Specifications | Fluke A20M-AF Computer Monitor User Manual

RPM4/HPMS A70M/A20M-AF™
Reference Pressure Monitor with
High Pressure Mounting System
Operation and Maintenance Manual
NSN 6685-01-529-6990 RN
(2 of 3)
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
High pressure liquids and gases are potentially hazardous. Energy stored in these liquids and gases can
be released unexpectedly and with extreme force. High pressure systems should be assembled and operated
only by personnel who have been instructed in proper safety practices.
This instrument is not to be operated in any other manner than that specified by the manufacturer.
© 2007 DH Instruments, a Fluke Company
All rights reserved.
Information in this document is subject to change without notice. No part of this document may be reproduced or transmitted in any
form or by any means, electronic or mechanical, for any purpose, without the express written permission of DH Instruments, a
Fluke Company 4765 East Beautiful Lane, Phoenix AZ 85044-5318, USA.
DH Instruments makes sincere efforts to ensure accuracy and quality of its’ published materials; however, no warranty, expressed
or implied, is provided. DH Instruments disclaims any responsibility or liability for any direct or indirect damages resulting from the
use of the information in this manual or products described in it. Mention of any product or brand does not constitute an
endorsement by DH Instruments of that product or brand. This manual was originally composed in English and was subsequently
translated into other languages. The fidelity of the translation cannot be guaranteed. In case of conflict between the English version
and other language versions, the English version predominates.
Products described in this manual are manufactured under international patents and one or more of the following U.S. patents:
5,142,483; 5,257,640; 5,331,838; 5,445,035. Other U.S. and international patents pending.
AutoRange, AutoZ, DH Instruments, DH, DHI, CalTool, COMPASS, GPC1-1000, PGC-1000-AF, RPM4, QDUT, Q-RPT, RPM4 and
SDS are trademarks, registered and otherwise, of DH Instruments, a Fluke Company.
Document No. 550136b-01
070627
Printed in the USA
© 2007 DH Instruments, a Fluke Company
TABLE OF CONTENTS
TABLE OF CONTENTS
TABLE OF CONTENTS ...............................................................I
TABLES .................................................................................. V
FIGURES................................................................................ VI
ABOUT THIS MANUAL ............................................................ VII
1.
INTRODUCTION ................................................................. 1
1.1
1.2
PRODUCT OVERVIEW ...........................................................................................................................1
SPECIFICATIONS ...................................................................................................................................2
1.2.1
1.2.2
1.2.2.1
1.2.2.2
2.
INSTALLATION .................................................................. 5
2.1
UNPACKING AND INSPECTION ............................................................................................................5
2.1.1
2.1.2
2.2
2.3
2.4
2.5
PREPARING FOR OPERATION ...................................................................................................................8
RPM4/HPMS FRONT, REAR AND SIDE VIEWS..........................................................................................8
RPM4/HPMS FRONT VIEW ......................................................................................................................8
RPM4/HPMS REAR VIEW.........................................................................................................................9
RPM4/HPMS SIDE VIEW ........................................................................................................................10
RPM4 FRONT AND REAR PANELS ..........................................................................................................10
RPM4 FRONT PANEL .............................................................................................................................10
RPM4 REAR PANEL................................................................................................................................11
POWER CONNECTION...............................................................................................................................11
FOOTSWITCH CONNECTION ....................................................................................................................11
TEST PORT CONNECTION ........................................................................................................................11
THE ATM PORTS OF RPM4 ...................................................................................................................12
CHECK/SET SECURITY LEVEL .................................................................................................................12
SETTING UP AUTOTEST FILES ................................................................................................................12
POWER-UP AND VERIFICATION.........................................................................................................13
2.5.1
2.5.2
2.5.2.1
2.5.2.2
2.6
2.7
REMOVING FROM PACKAGING .................................................................................................................5
INSPECTING CONTENTS.............................................................................................................................6
PGC-10000-AF SYSTEM.........................................................................................................................6
SITE REQUIREMENTS............................................................................................................................7
SETUP .....................................................................................................................................................8
2.4.1
2.4.2
2.4.2.1
2.4.2.2
2.4.2.3
2.4.3
2.4.3.1
2.4.3.2
2.4.4
2.4.5
2.4.6
2.4.6.1
2.4.7
2.4.8
3.
GENERAL SPECIFICATIONS.......................................................................................................................2
PRESSURE MEASUREMENT SPECIFICATIONS .......................................................................................3
QUARTZ REFERENCE PRESSURE TRANSDUCERS (Q-RPT)..............................................................3
ON-BOARD BAROMETER ........................................................................................................................3
SWITCH POWER ON ..................................................................................................................................13
CHECK PRESSURE MEASUREMENT OPERATION ................................................................................13
CHECKING ABSOLUTE MODE PRESSURE MEASUREMENT.............................................................13
CHECKING GAUGE MODE PRESSURE MEASUREMENT...................................................................13
SHORT TERM STORAGE .....................................................................................................................14
LONG TERM STORAGE AND/OR PREPARATION FOR SHIPPING ..................................................14
OPERATION ..................................................................... 15
3.1
USER INTERFACE ................................................................................................................................15
3.1.1
3.1.2
3.1.3
3.1.4
MAIN RUN SCREEN....................................................................................................................................15
FUNCTION / DATA KEYPAD LAYOUT AND PROTOCOL ........................................................................17
REMOTE [ENT] (ENTER) FOOTSWITCH...................................................................................................18
SOUNDS ......................................................................................................................................................18
Page I
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
3.2
GENERAL OPERATING PRINCIPLES .................................................................................................18
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5
3.2.6
3.3
DIRECT FUNCTION KEYS....................................................................................................................24
3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
3.3.6
3.3.6.1
3.3.6.2
3.3.6.3
3.3.6.4
3.3.6.5
3.3.6.6
3.3.6.7
3.3.7
3.3.8
3.3.9
3.3.9.1
3.3.9.2
3.3.10
3.3.10.1
3.3.10.2
3.4
[RANGE] ......................................................................................................................................................24
[UNIT]...........................................................................................................................................................26
[MODE] ........................................................................................................................................................27
[AUTORANGE] ............................................................................................................................................27
[LEAK CK] ...................................................................................................................................................29
[DISPLAY]....................................................................................................................................................31
AVG (AVERAGE) .....................................................................................................................................32
RATE ........................................................................................................................................................33
DEV (DEVIATION) ...................................................................................................................................34
RPT ..........................................................................................................................................................35
HI/LO ........................................................................................................................................................36
FREEZE ...................................................................................................................................................37
CLEAN .....................................................................................................................................................37
[HEAD] .........................................................................................................................................................38
[SDS]............................................................................................................................................................39
[AUTOZ].......................................................................................................................................................39
[AUTOZ] IN GAUGE MODE.....................................................................................................................39
[AUTOZ] IN ABSOLUTE MODE...............................................................................................................40
[ENT] (RUN AUTOTEST) ............................................................................................................................43
AUTOTEST INITIALIZATION...................................................................................................................44
TEST EXECUTION ..................................................................................................................................45
[SETUP] .................................................................................................................................................47
3.4.1
3.4.1.1
3.4.1.2
3.4.2
3.4.3
3.4.4
3.4.4.1
3.4.5
3.4.5.1
3.4.5.2
3.5
PRESSURE READY/NOT READY..............................................................................................................18
GAUGE MODE, DYNAMIC COMPENSATION FOR ATMOSPHERIC PRESSURE ..................................19
MULTIPE RANGES (Q-RPTS, AUTORANGE AND INFINITE RANGING) ................................................19
AUTOMATED TEST AND CALIBRATION SEQUENCES ..........................................................................20
HPMS (HIGH PRESSURE MOUNTING SYSTEM) .....................................................................................20
DIRECT FUNCTION KEYS SUMMARY ......................................................................................................24
<1RANGE> ..................................................................................................................................................47
SAVING AN AUTORANGE RANGE ........................................................................................................47
DELETING AUTORANGE RANGES .......................................................................................................48
<2RES> (RESOLUTION) .............................................................................................................................48
<3STAB>......................................................................................................................................................49
<4UL> (UPPER LIMIT) ................................................................................................................................50
OVER PRESSURE FUNCTION...............................................................................................................50
<5ATEST>....................................................................................................................................................51
DATA ........................................................................................................................................................51
FILE ..........................................................................................................................................................52
[SPECIAL] .............................................................................................................................................54
3.5.1
3.5.1.1
3.5.2
3.5.2.1
3.5.2.2
3.5.2.3
3.5.2.4
3.5.3
3.5.4
3.5.5
3.5.5.1
3.5.5.2
3.5.5.3
3.5.5.4
3.5.5.5
3.5.6
3.5.7
3.5.7.1
3.5.7.2
3.5.7.3
3.5.7.4
3.5.7.5
3.5.8
3.5.9
3.5.9.1
3.5.9.2
3.5.9.3
3.5.9.4
3.5.9.5
<1AUTOZ> ...................................................................................................................................................55
EDIT AUTOZ ............................................................................................................................................58
<2REMOTE> ................................................................................................................................................58
<1COM1, 2COM2> ..................................................................................................................................59
<3IEEE-488> ............................................................................................................................................59
<4FORMAT> ............................................................................................................................................59
<5RS232 SELF-TEST>............................................................................................................................59
<3HEAD> .....................................................................................................................................................60
<4SDS> ........................................................................................................................................................60
<5PREFS> ...................................................................................................................................................60
<1SCRSVR> ............................................................................................................................................61
<2SOUND> ..............................................................................................................................................61
<3TIME>...................................................................................................................................................62
<4ID>........................................................................................................................................................62
<5LEVEL> (SECURITY) ..........................................................................................................................63
<6PUNIT>.....................................................................................................................................................65
<7INTERNAL> .............................................................................................................................................66
<1BARO> .................................................................................................................................................67
<2READRT> ............................................................................................................................................67
<3RPT2X>................................................................................................................................................68
<4LO VNT> ..............................................................................................................................................68
<5LOG>....................................................................................................................................................68
<8CAL> ........................................................................................................................................................69
<9RESET> ...................................................................................................................................................69
<1SETS> ..................................................................................................................................................69
<2 UNITS> ...............................................................................................................................................70
<3ATEST>................................................................................................................................................70
<4 CAL> ...................................................................................................................................................71
<5 ALL> ....................................................................................................................................................71
© 2007 DH Instruments, a Fluke Company
Page II
TABLE OF CONTENTS
4.
REMOTE OPERATION ....................................................... 73
4.1
4.2
OVERVIEW ............................................................................................................................................73
INTERFACING.......................................................................................................................................73
4.2.1
4.2.1.1
4.2.1.2
4.2.1.3
4.3
PROGRAMMING FORMATS.................................................................................................................74
4.3.1
4.3.2
4.3.2.1
4.3.2.2
4.4
ERROR QUEUE...........................................................................................................................................97
STATUS BYTE REGISTER .........................................................................................................................98
STANDARD EVENT REGISTER .................................................................................................................99
READY STATUS REGISTER ....................................................................................................................100
IEEE STD. 488.2 COMMON AND STATUS PROGRAM MESSAGES ...............................................101
4.6.1
5.
PROGRAMMING MESSAGES ....................................................................................................................77
ERROR MESSAGESS.................................................................................................................................78
PROGRAM MESSAGE DESCRIPTION OVERVIEW..................................................................................79
PROGRAM MESSAGE DESCRIPTIONS....................................................................................................80
STATUS REPORTING SYSTEM ...........................................................................................................97
4.5.1
4.5.2
4.5.3
4.5.4
4.6
CLASSIC PROGRAM MESSAGE FORMAT ..............................................................................................75
ENHANCED PROGRAM MESSAGE FORMAT ..........................................................................................75
USING COMMAND TYPE COMMANDS .................................................................................................75
USING QUERY TYPE COMMANDS ...................................................................................................76
COMMANDS..........................................................................................................................................77
4.4.1
4.4.2
4.4.3
4.4.4
4.5
RS232 INTERFACE .....................................................................................................................................73
COM1 .......................................................................................................................................................73
IEEE-488 ..................................................................................................................................................74
COM2 .......................................................................................................................................................74
PROGRAM MESSAGE DESCRIPTIONS..................................................................................................101
MAINTENANCE,
5.1
5.2
OVERVIEW ..........................................................................................................................................105
RPM4 MAINTENANCE ........................................................................................................................105
5.2.1
5.2.1.1
5.2.1.2
5.2.2
5.3
REMOVING RPM4 FROM HPMS ..............................................................................................................114
OPENING AND CLOSING THE RPM4 ENCLOSURE ..............................................................................115
RELOADING EMBEDDED SOFTWARE INTO FLASH MEMORY ...........................................................115
SUBASSEMBLY DESCRIPTION AND LOCATION..................................................................................116
MICRO BOARD......................................................................................................................................116
POWER SUPPLY MODULE ..................................................................................................................117
DRIVER BOARD ....................................................................................................................................117
ON-BOARD BAROMETER ....................................................................................................................117
Q-RPT MODULE ....................................................................................................................................117
DISPLAY ................................................................................................................................................117
COOLING FAN.......................................................................................................................................118
Q-RPT MODULE PNEUMATIC SCHEMATIC...........................................................................................118
RPM4 ILLUSTRATED PARTS BREAKDOWN ...................................................................................118
HPMS MAINTENANCE........................................................................................................................ 124
5.6.1
5.7
PRINCIPLE ................................................................................................................................................107
PA AND PM COEFFICIENTS ................................................................................................................107
AS RECEIVED AND AS LEFT DATA ....................................................................................................108
EQUIPMENT REQUIRED ..........................................................................................................................108
SET-UP AND PREPARATION ..................................................................................................................109
RECOMMENDED CALIBRATION POINT SEQUENCE ...........................................................................110
TURNING OFF ABSOLUTE MODE CAPABILITY FOR A Q-RPT ...........................................................110
Q-RPT CALIBRATION USING CALTOOL FOR Q-RPTS SOFTWARE ...................................................111
EDITING AND VIEWING Q-RPT CALIBRATION INFORMATION ...........................................................111
Q-RPT ADJUSTMENT WITHOUT CALTOOL FOR Q-RPTS SOFTWARE..............................................112
RPM4 REPAIR.....................................................................................................................................114
5.4.1
5.4.2
5.4.3
5.4.4
5.4.4.1
5.4.4.2
5.4.4.3
5.4.4.4
5.4.4.5
5.4.4.6
5.4.4.7
5.4.5
5.5
5.6
AUTOZERO OF Q-RPTS...........................................................................................................................105
GAUGE MODE AUTOZERO..................................................................................................................105
ABSOLUTE MODE AUTOZERO ...........................................................................................................106
ADJUSTMENT OF THE ON-BOARD BAROMETER................................................................................106
RPM4 Q-RPT CALIBRATION.............................................................................................................. 107
5.3.1
5.3.1.1
5.3.1.2
5.3.2
5.3.3
5.3.4
5.3.5
5.3.6
5.3.7
5.3.8
5.4
ADJUSTMENTS A N D C A L I B R A T I O N . . . . . . . . . . . . . . 1 0 5
HPMS OVERHAUL ....................................................................................................................................124
HPMS ILLUSTRATED PARTS BREAKDOWN ...................................................................................125
Page III
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
6.
TROUBLESHOOTING .......................................................129
7.
APPENDIX ......................................................................133
7.1
UNIT CONVERSION ............................................................................................................................133
7.1.1
8.
WARRANTY ....................................................................135
8.1
9.
PRESSURE................................................................................................................................................133
OVERVIEW ..........................................................................................................................................135
GLOSSARY .....................................................................137
© 2007 DH Instruments, a Fluke Company
Page IV
TABLES & FIGURES
TABLES
Table 1. RPM4/HPMS A70M/A20M-AF Parts List....................................................................................... 6
Table 2. Settings and what they are specific to (range, measurement mode, Q-RPT, system)................ 20
Table 3. Summary of RPM4 function key operation .................................................................................. 24
Table 4. Settings made by AutoRange ...................................................................................................... 28
Table 5. AutoZ ON and OFF ...................................................................................................................... 56
Table 6. Security levels .............................................................................................................................. 64
Table 7. UNIT function - available units of measure.................................................................................. 66
Table 8. READRT - display update rates................................................................................................... 68
Table 9. Reset – Sets................................................................................................................................. 70
Table 10. Reset – Cal ................................................................................................................................ 71
Table 11. Reset – All.................................................................................................................................. 71
Table 12. COM1 pin designations and connections .................................................................................. 73
Table 13. COM2 DB-9F pin designations .................................................................................................. 74
Table 14. Program message list ................................................................................................................ 77
Table 15. Error #s and descriptions ........................................................................................................... 78
Table 16. 8 Bit status byte register ............................................................................................................ 98
Table 17. 8 bit standard event register ...................................................................................................... 99
Table 18. 8 bit ready status register......................................................................................................... 100
Table 19. Program message list .............................................................................................................. 101
Table 20. Calibration point sequence for A20M and A70M Q-RPTs ....................................................... 110
Table 21. RPM4 Front Panel Illustrated Parts Breakdown (see Figure 15)............................................ 118
Table 22. RPM4 Rear Panel Illustrated Parts Breakdown (see Figure 16) ............................................ 119
Table 23. RPM4 Illustrated Parts Breakdown of Display Assembly (see Figure 17)............................. 120
Table 24. RPM4 Illustrated Parts Breakdown of Internal Assembly (see Figure 18) ............................ 121
Table 25. RPM4 Illustrated Parts Breakdown of Internal Assembly (see Figure 19) ............................ 122
Table 26. RPM4 Illustrated Parts Breakdown of Electronic Chassis (see Figure 20) ........................... 123
Table 27. HPMS Assembly Illustrated Parts Breakdown (see Figure 21 and 22) .................................. 125
Table 28. Troubleshooting guide ............................................................................................................. 129
Table 29. Pressure unit of measure conversion coefficients ................................................................... 133
Table 30. DHI Authorized Service Providers ........................................................................................... 135
Page V
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
FIGURES
Figure 1. Typical PGC-10000-AF installation layout.................................................................................... 7
Figure 2. RPM4/HPMS front view ................................................................................................................ 8
Figure 3. RPM4/HPMS rear view................................................................................................................. 9
Figure 4. RPM4/HPMS side view............................................................................................................... 10
Figure 5. RPM4 front panel ........................................................................................................................ 10
Figure 6. RPM4 rear panel......................................................................................................................... 11
Figure 7. MAIN RUN screen display fields................................................................................................. 16
Figure 8. Keypad layout ............................................................................................................................. 17
Figure 9. RPM4/HPMS front view .............................................................................................................. 22
Figure 10. HPMS pneumatic schematic..................................................................................................... 23
Figure 11. Status register schematic ......................................................................................................... 98
Figure 12. RPM4/HPMS disassembly view ............................................................................................. 115
Figure 13. RPM4 internal view ................................................................................................................. 116
Figure 14. Pneumatic schematic of RPM4 Q-RPT Module ...................................................................... 118
Figure 15. RPM4 Illustrated Parts Breakdown of Front Panel .................................................................. 118
Figure 16. RPM4 Illustrated Parts Breakdown of Rear Panel................................................................... 119
Figure 17. RPM4 Illustrated Parts Breakdown of Display Assembly ........................................................ 120
Figure 18. RPM4 Illustrated Parts Breakdown of Internal Assembly........................................................ 121
Figure 19. RPM4 Illustrated Parts Breakdown of Internal Assembly........................................................ 122
Figure 20. RPM4 Illustrated Parts Breakdown of Electronic Chassis....................................................... 123
Figure 21. HPMS Schematic..................................................................................................................... 126
Figure 22. RPM4/HPMS-AF Assembly ..................................................................................................... 127
© 2007 DH Instruments, a Fluke Company
Page VI
ABOUT THIS MANUAL
ABOUT THIS MANUAL
This manual is intended to provide the user with the basic information necessary to operate an
RPM4/HPMS A70M/A20M reference pressure monitor with high pressure mounting system. It also
includes a great deal of additional information provided to allow you to optimize the use of the instrument
and take full advantage of its many features and functions.
Before using the manual, take a moment to familiarize yourself with the Table of Contents structure:
Sections 1, 2 and 3 should be read by all first time RPM4 users. Section 3 is most important for those
using the local front panel interface but should be read over by all users to familiarize themselves with
general RPM4 operating principles. Section 4 is for remote operation from an external computer. Section
5 provides maintenance and calibration information. Section 6 is a quick troubleshooting guide. Use it to
troubleshoot unexpected RPM4 behavior based on the symptom of that behavior. Certain words and
expressions have specific meaning as they pertain to RPM4. The Glossary, Section 9, is useful as a
quick reference for exact definition of specific words and expressions as they are used in the manual.
For those of you who “don’t read manuals”, go directly to Section 2.3 to set up your RPM4/HPMS and
then go to Section 2.4 for power-up and verification. This will get you up and running quickly with a minimal risk
of causing damage to yourself or your new instrument. THEN… when you have questions or start to wonder
about all the great features you might be missing, get into the manual!
RPM4/HPMS A70M/A20M-AF is usually delivered as part of an PGC-10000-AF system which includes a
PGC1-10000-AF pneumatic pressure controller and a GB-152-AF gas booster. The PGC1 and the GB-152 have
their own Operation and Maintenance Manuals.
Manual Conventions
(CAUTION) is used in throughout the manual to identify user warnings and cautions.
(NOTE) is used throughout the manual to identify operating and applications advice and additional
explanations.
[ ] indicates direct function keys (e.g., [RANGE]).
< > indicates RPM4 screen displays (e.g., <1yes>).
Page VII
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
NOTES
© 2007 DH Instruments, a Fluke Company
Page VIII
1. INTRODUCTION
1.
INTRODUCTION
1.1
PRODUCT OVERVIEW
RPM4/HPMS A70M/A20M-AF is the combination of an RPM4 A70M/A20M-AF reference pressure
monitor and an HPMS High Pressure Mounting System.
RPM4 A70M/A20M-AF is a stand-alone, microprocessor driven, reference pressure monitor intended to
accurately measure gas pressure in a variety of pressure calibration, measurement and testing
applications. It has been designed to provide very high performance and extensive features combined
with maximum versatility, ease of use and durability. RPM4 A70M/A20M-AF covers the range from 0 to
10 000 psi gauge and atmosphere to 10 000 psi absolute using two high accuracy quartz reference
pressure transducers (Q-RPTs) and an on-board barometer to measure pressure.
RPM4 A70M/A20M-AF is controlled locally by the operator using its front panel display, keypad and foot
pedal or remotely by a computer using ASCII character command strings over its RS-232 and IEEE-488
interfaces.
RPM4 A70M/A20M-AF uses an AutoRange feature to automatically select the most appropriate Q-RPT
and to optimize the RPM4 setup to cover the range.
The HPMS mounts the RPM4 at a convenient viewing angle and contains the hardware to isolate the
RPM4’s low pressure Q-RPT (A20M (3 000 psi)) when the high pressure Q-RPT (A70M (10 000 psi) ) is
in use.
RPM4/HPMS A70M/A20M-AF is typically delivered as part of a PGC-10000-AF Pneumatic Gauge
Calibrator. The PGC-10000-AF system includes a GPC1-10000-AF pneumatic pressure controller and a
GB-152-AF gas booster that have their own Operation and Maintenance Manuals.
Page 1
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
1.2
SPECIFICATIONS
1.2.1
GENERAL SPECIFICATIONS
Power Requirements:
Operating Temperature Range:
Storage Temperature Range:
Weight:
Dimensions:
Communication Ports
Fuses:
Pressure Range:
85 to 264 VAC, 50/60 Hz, 25 VA max consumption
and 12VDC, 1.2 A
18 to 28 °C
- 20 to 70 °C
11 kg (22 lb) approx.
23.5 cm H x 29.4 cm W x 37.5 cm D (9.3 in. x 11.6 in. x 14.8 in.)
RS232 (COM1, COM2), IEEE-488.2
1 A, 250 VAC fuse, 5 x 20 mm, time lag type fuse
Internal power supply fuse not replaceable by operator: 2.5A, 250 VAC
0 to 10 000 psi (70 MPa) in gauge mode
Atmosphere to 10 000 psi (70 MPa) in absolute mode
Operating Medium:
Pressure Connections:
Any clean, dry, non-corrosive gas
DH500 female
DH500 is a gland and collar type fitting for 6mm (1/4 in.) coned and left
hand threaded tubes equivalent to AE F250C, HIP HF4, etc.
Pressure Limits:
Maximum Working Pressure: 10 000 psi (70 MPa)
Maximum Pressure Without Damage: 12 000 psi (83 MPa)
When low Q-RPT is connected to pressure:
Maximum Working Pressure: 3 000 psi (20 MPa)
Maximum Pressure Without Damage: 3 600 psi (24 MPa)
PGC-10000-AF SYSTEM
Temperature:
Operating:
Storage:
Relative Humidity:
© 2007 DH Instruments, a Fluke Company
18 to 28 °C
-20 to 70 °C
Operating:
15 to 70%RH (non-condensing)
Storage:
10 to 90%RH (non-condensing)
Page 2
1. INTRODUCTION
1.2.2
PRESSURE MEASUREMENT SPECIFICATIONS
1.2.2.1
QUARTZ REFERENCE PRESSURE TRANSDUCERS (Q-RPT)
RPM4 A70M/A20M is configured with two quartz reference pressure transducers
(Q-RPT) modules to measure pressure.
The Q-RPTs can measure absolute and gauge pressure. Gauge pressure is
defined by offsetting atmospheric pressure and applying dynamic compensation
for atmospheric changes using the on-board barometer (see Section 3.2.2).
Warm Up Time
30 minute temperature stabilization recommended from
cold power up.
Compensated Temperature Range
5 to 35 °C
Operating Temperature Range
8 to 28 °C
Maximum Range
Resolution
Precision
A20M Q-RPT
A70M-QRPT
3 000 psi (20 MPa)
10 000 psi (70 MPa)
user adjustable to 1 ppm of Q-RPT maximum or 10 ppm
of active AutoRange, whichever is larger,
1
± 0.0175 % of reading, or
0.13 psi, whichever
is larger
± 0.004 of reading
2
Predicted Stability
3
Measurement Uncertainty
± 0.0175 % of reading, or
0.44 psi, whichever
is larger
± 0.02 % of reading, or
0.15 psi, whichever
is larger
± 0.02 % of reading, or
0.5 psi whichever
is larger
1. Combined linearity, hysteresis, repeatability.
2. Predicted Q-RPT measurement stability limit (k=2) over one year assuming regular use of AutoZero function. As stability
can only be predicted and varies from Q-RPT to Q-RPT, stability for a specific Q-RPT should be established from
experience.
3. Maximum deviation of the Q-RPT indication from the true value of applied pressure including precision, predicted one
year stability, temperature effect and calibration uncertainty (assumes calibration reference uncertainty of ±0.005% of
reading), combined and expanded (k=2) following the ISO “Guide to the Expression of Uncertainty in Measurement.”.
1.2.2.2
ON-BOARD BAROMETER
The measurement uncertainty of the on-board barometer is not significant to
RPM4 Q-RPT measurement uncertainty. It is used only to measure small, short
term changes in atmospheric pressure to provide dynamic compensation of the
Q-RPT’s atmospheric pressure offset when in gauge pressure measurement
mode (see Section 3.2.2)
Sensor Technology:
Warm Up Time:
Resolution:
Page 3
Micro-machined silicon
None required
0.1 Pa (0.000015 psi)
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
NOTES
© 2007 DH Instruments, a Fluke Company
Page 4
2. INSTALLATION
2.
INSTALLATION
2.1
UNPACKING AND INSPECTION
RPM4/HPMS A70M/A20M-AF is usually delivered as part of an PGC-10000-AF system which includes a
GPC1-10000-AF gas pressure controller and a GB-152-AF gas booster.
2.1.1
REMOVING FROM PACKAGING
RPM4/HPMS A70M/A20M-AF is delivered, along with its accessories, in a reusable molded
plastic, shipping container with polyurethane inserts to hold it in place.
Remove the RPM4/HPMS A70M/A20M-AF and its accessories from the shipping container
and remove each element from its protective plastic bag.
Retain the shipping container for repacking the RPM4/HPMS A70M/A20M-AF when it is
shipped for recalibration or repair.
Page 5
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
2.1.2
INSPECTING CONTENTS
Check that all items are present and have no visible damage. If damage is noted, report it to
your Receiving Department for appropriate action.
A new RPM4/HPMS A70M/A20M-AF includes all items listed in Table 1.
Table 1. RPM4/HPMS A70M/A20M-AF Parts List
DESCRIPTION
RPM4/HPMS A70M/A20M-AF Reference Pressure
Monitor/High Pressure Mounting System
PART NO.
402192
ACCESSORIES:
1 ea.
Transport case (with inserts) (used for original
shipment)
124198
1 ea.
Foot switch assembly
401613
1 ea.
PGC-10000-AF Documentation Disk including:
402189
• RPM4/HPMS A70M/A20M-AF Operation and
Maintenance Manual, p/n 550136
• GPC1-10000-AF Operation and Maintenance
Manual, p/n 550135
• GB-152-AF Operation and Maintenance Manual,
p/n 550137
2.2
1 ea.
Calibration Report
550100
1 ea.
Test Report (PGC-10000-AF) (if the RPM4/HPMS is
delivered as part of an PGC-10000-AF system)
550138
1 ea.
Power cord (7.5 ft)
100770
1 ea.
General Accessories Disk (white CD) (Important :
Includes system support software and
documentation)
102987
PGC-10000-AF SYSTEM
RPM4/HPMS A70M/A20M-AF is usually delivered as the reference pressure measurement component of
a PGC-10000-AF Pneumatic Gauge Calibrator. The PGC-10000-AF system includes:
•
RPM4/HPMS A70M/A20M-AF: Reference pressure monitor and high pressure mounting system used
as the pressure measuring reference of the calibration system.
•
GPC1-10000-AF: Gas pressure controller used to set and adjust high pressure gas in the calibration
system.
•
GB-152-AF: Gas booster package used to supply gas pressure up to 10 000 psi (70 MPa) to the
GPC1-10000-AF pressure controller.
© 2007 DH Instruments, a Fluke Company
Page 6
2. INSTALLATION
Each of the three components of the PGC-10000-AF system has its own Operation and Maintenance
Manual and individual setup and start up instructions. Figure 1 shows the typical setup configuration of a
complete PGC-10000-AF system.
RPM4/HPMS A70M/A20M Reference Pressure Monitor
GPC1-10000-AF
Gas Pressure Controller
CAUTION
GB152-AF
GB152
Setting
Drive Air
Control Kit
GB152-AF
GB152
Pressure
Gas Generation Component
Booster
Remote ENTER Footswitch
Figure 1. Typical PGC-10000-AF installation layout
2.3
SITE REQUIREMENTS
The RPM4/HPMS A70M/A20M-AF is usually delivered as part of an PGC-10000-AF pneumatic gauge
calibrator. The PGC-10000-AF also includes a GPC1-10000-AF and a GB-152-AF that each have their
own Operation and Maintenance Manual. See the GPC1 and GB-152 Operation and Maintenance
Manuals for information on their site requirements. Also see Section 2.2 for information on setup of a
complete PGC-10000-AF system.
Install RPM4 on a flat, stable surface at a convenient height. The front feet can be extended so that the
unit can be inclined for easier viewing. Consider the placement of the FOOT SWITCH which may need to
be accessed frequently while running calibrations.
Support facilities required for RPM4/HPMS A70M/A20M-AF include an electrical power source of 85 to
264 VAC, 47 to 440 Hz.
Page 7
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
2.4
SETUP
2.4.1
PREPARING FOR OPERATION
To prepare RPM4 for check out and operation:
Remove the plastic plug from the RPM4/HPMS rear panel TEST connection.
Remove the protective plastic sheet from the front panel display.
Familiarize yourself briefly with the RPM4 and HPMS front and rear panels (see Sections
2.4.2, 2.4.3).
2.4.2
RPM4/HPMS FRONT, REAR AND SIDE VIEWS
2.4.2.1
RPM4/HPMS FRONT VIEW
1. RPM4 A70M/A20M-AF Reference Pressure Monitor
2. Lo Q-RPT shut-off valve position LED
3. Lo Q-RPT shut-off valve
4. Lo Q-RPT active valve position LED
5. Lo Q-RPT active caution LED
Figure 2. RPM4/HPMS front view
© 2007 DH Instruments, a Fluke Company
Page 8
2. INSTALLATION
2.4.2.2
1.
RPM4/HPMS REAR VIEW
Foot switch (remote [ENT])
cable connector
2.
TEST port (DH500 F)
Figure 3. RPM4/HPMS rear view
Page 9
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
2.4.2.3
RPM4/HPMS SIDE VIEW
1. Lo Q-RPT shut off valve
2. RPM4/HPMS A70M/A20M Reference
Pressure Monitor
3. Pressure relief valve (3 300 psi)
4. Foot switch (remote [ENT]) cable connector
5. TEST port (DH500 F)
Figure 4. RPM4/HPMS side view
2.4.3
RPM4 FRONT AND REAR PANELS
2.4.3.1
RPM4 FRONT PANEL
1. Ready/Not Ready indicator
2. Display
3. Remote activity indicator
4. Cursor control keys
5. Multi-function keypad
Figure 5. RPM4 front panel
© 2007 DH Instruments, a Fluke Company
Page 10
2. INSTALLATION
2.4.3.2
RPM4 REAR PANEL
1. 12VDC Power Supply Connection
2. Accessories connector (to HPMS rear
panel FOOTSWITCH and LEDs)
3. IEEE-488 Connector
4. COM2 Connector
5. COM1 Connector
6. Power Switch
7. Fuse
8.
9.
10.
11.
12.
13.
14.
Electrical Power Connector
(IEC-320-C13)
Fan
TEST(+) Pressure Port, Lo Q-RPT
TEST(+) Pressure Port, Hi Q-RPT
ATM Pressure Port, Lo Q-RPT
ATM Pressure Port, Hi Q-RPT
Product Label (bottom of case)
Figure 6. RPM4 rear panel
2.4.4
POWER CONNECTION
Connect the supplied power cable to the RPM4 rear panel power module.
Connect the other end of the power cable to an electrical supply of 85 to 264 VAC,
50/60 Hz.
2.4.5
FOOTSWITCH CONNECTION
Connect the foot switch supplied in the RPM4/HPMS accessories to the HPMS rear panel
electrical connection labeled FOOT SWITCH. Place the foot switch on the floor at a convenient
location (see Section 2.2, Figure 1). The FOOT SWITCH function is equivalent to the RPM4 front
panel [ENT] key and may be used frequently while running tests and calibrations.
2.4.6
TEST PORT CONNECTION
A single high pressure TEST port is provided on the rear panel of the HPMS.
The test port connection is a DH500 F. DH500 is a gland and collar type fitting for 1/4 in.
(6 mm) coned and left hand threaded tube. DH500 is equivalent to AE F250C, HIP HF4, etc.
Connection to GPC1 if the RPM4/HPMS is Part of an PGC-10000-AF System
If the RPM4/HPMS was delivered as part of a PGC-10000-AF Pneumatic Gauge Calibrator, a
GPC1 Gas Pressure Controller was delivered with it. The GPC1 includes a fittings kit with
the necessary fittings to interconnect the RPM4/HPMS and GPC1 as well as instructions on
making the connection. See the GPC1-10000-AF manual.
Page 11
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
USE THE CORRECT PRESSURE CONNECTORS: The RPM4/HPMS TEST port fitting is a
DH500 F (see Section 1.2.1). It is NOT a 1/8 in. NPT F. Never use a fitting other than the
corresponding male fitting in these connectors. Damage to the connectors and dangerous failure
under pressure could result from using incorrect fittings.
DO NOT APPLY PRESSURE UNTIL YOU ARE FAMILIAR WITH OPERATION: The RPM4/HPMS
rear panel test port connects internally to both the RPM4’s 3 000 psi (20 MPa) and 10 000 psi
(70 MPa) Q-RPTs. The valve on the front of the HPMS isolates the low pressure Q-RPT when the
high pressure Q-RPT is in use. Do not apply pressure to the RPM4/HPMS until you are familiar
with its operation and know how to protect the low pressure Q-RPT from overpressure (see
Section 3.2.5). FAILURE TO PROTECT THE LOW PRESSURE Q-RPT FROM OVERPRESSURE MAY
DESTROY IT. DAMAGE DUE TO Q-RPT OVERPRESSURE IS NOT COVERED BY THE PRODUCT
WARRANTY.
2.4.6.1
THE ATM PORTS OF RPM4
The ATM ports on the RPM4 Q-RPT modules are connected to the RPM4’s
internal barometer to assure that the RPM4 gauge pressure measurements are
relative to ambient pressure. These ports should always be left completely
unobstructed and open to atmosphere.
NEVER plug, obstruct or connect a supply pressure to the RPM4 Q-RPT module
ATM ports. This may adversely affect GAUGE mode operation and AutoZeroing
functions.
2.4.7
CHECK/SET SECURITY LEVEL
RPM4 has a security system based on user levels. By default, the security system is set to
“low”, which includes access restriction to internal calibration coefficients, and there is no
password required to change the security level. See Section 3.5.5.5 for information on the
security level system. As part of the RPM4 startup, determine the security level that is
appropriate for the RPM4 and set a password if desired.
RPM4 is delivered with the security level set to “low” to avoid inadvertent altering of critical
internal settings but with access to changing security levels unrestricted. It is recommended that the
low security level be maintained at all times and password protection be implemented if control
over setting of security levels is desired.
2.4.8
SETTING UP AUTOTEST FILES
RPM4 supports automated test/calibration sequences. AutoTest sequence
parameters for testing specific DUTs can be stored in File AutoTest files and
recalled to run a test. Consider setting up File AutoTest files for frequently tested
DUTs as part of the RPM4 set up process (see Section 3.3.10, 3.4.5.2).
© 2007 DH Instruments, a Fluke Company
Page 12
2. INSTALLATION
2.5
POWER-UP AND VERIFICATION
2.5.1
SWITCH POWER ON
Actuate the power switch on the RPM4 rear panel. Observe the front panel display as RPM4
initializes, error checks and goes to the MAIN RUN screen (see Section 3.1.1). If the RPM4
fails to reach the main run screen, service is required. Record the sequence of operations
and displays observed and contact a DHI Authorized Service Provider (see Section 8,
Table 23).
Check that one of the two green Valve Status LEDs on the front panel of the HPMS is lit (the
red LED should NOT be ON). If neither of the green LEDs on the HPMS front panel lights,
check that the 12 pin circular connector at the rear of the RPM4 itself is properly connected to
the ACC. J1 connector.
2.5.2
CHECK PRESSURE MEASUREMENT OPERATION
2.5.2.1
CHECKING ABSOLUTE MODE PRESSURE MEASUREMENT
Let the RPM4 warm up with power ON for approximately 30 minutes.
Press [MODE] on the RPM4 and select absolute. If desired, change the
pressure unit of measure using [UNIT] (see Section 3.3.2).
Open the RPM4/HPMS TEST port to atmosphere. Put the valve knob in the
HPMS front panel into the Lo Q-RPT Active position. This opens the Lo and Hi
Q-RPTs to the HPMS TEST port.
Use [RANGE] (see Section 3.3.1) to select the Lo Q-RPT. Observe the RPM4
indicated pressure. Check that the agreement of the RPM4 indicated value with
a calibrated barometer in the same room is ± 0.15 psi. The calibrated barometer
must have a measurement uncertainty of ± 0.25% of better.
Use [RANGE] to select the Hi Q-RPT Check that the agreement of the RPM4
indicated value with a calibrated barometer in the same room is ± 0.5 psi.
If a Q-RPT does not agree within tolerance, it may need to be AutoZeroed (see
Section 3.3.9), calibrated (see Section 5.3) or repaired.
2.5.2.2
CHECKING GAUGE MODE PRESSURE MEASUREMENT
Let the RPM4 warm up with power ON for at approximately 30 minutes.
Open the RPM4/HPMS TEST port to atmosphere. Put the valve knob in the
HPMS front panel into the Lo Q-RPT Active position. This opens the Lo and Hi
Q-RPTs to the HPMS TEST port.
Use [RANGE] (see Section 3.3.1) to select the Lo Q-RPT. Press [MODE] on the
RPM4 and select gauge. If desired, change the pressure unit of measure using
[UNIT] (see Section 3.3.3).
The value indicated should be near zero. Press [AutoZ]. This runs AutoZ to
zero the Q-RPT reading (see Section 3.3.9.1). Upon return to the main run
screen, observe that the indication of measured pressure has zeroed.
Use [RANGE] to select the Hi Q-RPT and repeat the zeroing process.
If the display fails to zero properly for either Q-RPT, RPM4 may need repair.
Page 13
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
It is normal for RPM4 to indicate a value other than zero when vented when
gauge mode is first entered or ranges are changed, especially if AutoZ is OFF, RPM4
has been OFF for some time or its location has changed.
2.6
SHORT TERM STORAGE
The following is recommended for short term storage of RPM4/HPMS:
•
Vent the RPM4/HPMS TEST port.
•
Switch the RPM4 power OFF.
2.7
LONG TERM STORAGE AND/OR PREPARATION FOR
SHIPPING
The following is recommended for long term storage and or shipping of RPM4/HPMS:
•
Plug the HPMS TEST port.
•
Place the RPM4/HPMS in a plastic bag.
•
Place the RPM4/HPMS in the custom shipping/storage case in which it was delivered.
© 2007 DH Instruments, a Fluke Company
Page 14
3. OPERATION
3.
OPERATION
3.1
USER INTERFACE
RPM4/HPMS is designed to offer the optimum balance between simple, straight forward operation and
the availability of a wide variety of functions with a high level of operator discretion if desired.
The local operator interface is through the RPM4 front panel 2 x 20 character alpha-numeric display, a
function/data keypad, a cursor control pad, an [ENTER] footswitch and a Ready/Not Ready indicator.
Remote communications are also available via RS-232 or IEEE-488 interfaces (see Section 4).
The HPMS mounts the RPM4 at a convenient viewing angle and includes a valve and visual indicators to
isolate and protect the RPM4’s 3 000 psi Q-RPT (A20M) when using the 10 000 psi Q-RPT (A70M) (see
Section 3.2.5).
3.1.1
MAIN RUN SCREEN
The RPM4 MAIN RUN screen is its home display that is reached on power-up and from which
other functions and menus are accessed. It is the very top level of all menu structures.
The MAIN RUN screen is where RPM4 is left in normal operation. It displays the current
measured pressure as well as a variety of additional information if desired.
Figure 7 and its legend summarize the RPM4 MAIN RUN screen fields and their functions.
RPM4 has a screen saver function which causes the display to dim if no key is pressed for
10 minutes. Pressing a key restores full power to the display. The screen saver time can be
changed or screen saving can be completely suppressed (see Section 3.5.5.1).
Page 15
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
P R ES S URE 1 U NI T M h z R R
D D I SP L AYF U C NI O Nnn / n n
DISPLAY FIELD
NAME
PURPOSE
CONTENTS
1. PRESSURE1
Measured
pressure
Displays pressure
measured by the
active Q-RPT
Numerical pressure value and
sign.
1.2.2.1,
3.3.1
2. UNIT
Unit of
measure
Identifies unit of
measure in which
pressure values are
displayed
Pressure unit symbol
3.3.2
3. M
Measurement
mode
Identifies
measurement mode
of displayed pressure
<a>
<g>
absolute
gauge
3.3.3
4. h
Head
pressure
indicator
Indicates whether a
fluid head correction
is applied to
PRESSURE1
<h>
the fluid head is not
zero
<blank> fluid head is zero
3.3.7
5. z
AutoZero
indicator
Indicates whether
the AutoZero function
is ON or OFF for the
active Q-RPT and
measurement mode
<z>
AutoZ is ON
<blank> AutoZ is OFF
3.5.1,
3.3.9
6. RR
Active
Q-RPT
position
indicator
Indicates the position
of the active Q-RPT in
the RPM4
<Hi> Internal Hi
<Lo> Internal Lo
3.2.3
7. nn/nn
Sequence
progress
indicator
Indicates progress of
an ATest sequence,
during test execution
<nn/nn> Number of this point
over total number of points
in the sequence
3.3.10
8. DISPLAY
FUNCTION
Information
specific to
the DISPLAY
mode
Pressure indication
depending on current
RPM4 DISPLAY
function. Leading
character identifies
the value
Numerical pressure value
and sign.
3.3.6
9. D
Pressure
information
indicator
Pressure information
indicator depending
on current RPM4
DISPLAY function.
<σ>
3.3.6
<R>
<H>
<D>
<),
Display mode is
AVERAGE and value is
standard deviation
Display mode is RATE
and value is pressure rate
of change per second
Display mode is HI/LO and
value is high, then low
Display mode is
DEVIATION and value is
difference from current target
↑ , ↓ > Display mode is Q-
RPT and value is
measurement of inactive
Q-RPT
<F> Display mode is FREEZE
and value is last captured
reading
Blank, no character Current
display mode is CLEAN
Figure 7. MAIN RUN screen display fields
© 2007 DH Instruments, a Fluke Company
Page 16
SECTION
3. OPERATION
3.1.2
FUNCTION / DATA KEYPAD LAYOUT AND PROTOCOL
The RPM4 has a function/data keypad for local operator access to direct
functions, function menus and for data entry.
1. The Function/Data keys allow very
commonly used functions to be accessed
directly by a single keystroke when pressed
from the MAIN RUN screen (see Section
3.1.1).
The name of the function is on the bottom
half of the key. These keys enter numerical
values when editing.
2. The Editing and Execution keys are for
starting
and
suspending
command
execution, cursor control in menus and
editing entries.
3. The Menu/Data keys provide access to
function menus when pressed from the
MAIN RUN screen. The menu name is on
the bottom half of the key. The SETUP
menu is for more frequently used functions
(see Section 3.4). The SPECIAL menu is
for functions that are not generally used as
a part of day to day operation (see Section
3.5). These keys enter numerical values
when editing.
Figure 8. Keypad layout
Pressing the [ENT] key generally causes execution or forward movement in the
menu tree.
Pressing the [ESC] key moves back in the menu tree and/or causes execution to
cease or suspend. Pressing [ESC] repeatedly eventually returns to the MAIN RUN
screen and, from there, allows momentary viewing of the RPM4 introduction screen.
Pressing the [+/-] key changes a numerical sign when editing. It also toggles
through multiple screens when available and, from some run screens, is a
shortcut to a momentary display of active RANGE.
Pressing the [ ], [ ], [ ] and [ ] keys allows up, down, reverse and
forward cursor movement when editing data entry or moving in menus.
Some screens go beyond the two lines provided by the display. This is
indicated by a flashing arrow in the second line of the display. Press the cursor
control keys to move the cursor to access the lines that are not visible or directly
enter the number of the hidden menu choice if you know it.
Page 17
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
3.1.3
REMOTE [ENT] (ENTER) FOOTSWITCH
Operating the footswitch is the equivalent of pressing [ENT] on the front panel.
The remote ENTER feature can be particularly convenient when running AutoTests (see
Section 3.3.10) in which the operator’s hands are not free or attention is on the device under
test rather than the RPM4.
3.1.4
SOUNDS
RPM4 is equipped with a variable frequency tone device to provide audible feedback and
alarms. The beeper is used for the following indications.
3.2
Valid key press
Brief beep. Choice between three frequencies or NO
sound is available (see Section 3.5.5.2).
Invalid key press
Descending two tone “blurp”.
Change HPMS Lo Q-RPT
shut-off valve setting
Four one second beeps (see Section 3.2.5, 3.3.1).
Leak check completed
Three two second beeps (see Section 3.3.5).
Upper or lower limit exceeded
Intermittent one second beeps (see Section 3.4.4).
Pmax! (overpressure limit)
exceeded
Eight second high frequency beep (see Section 3.4.4.1).
Hi Q-RPT is selected but Lo
Q-RPT is being pressurized
Intermittent two second high frequency beep. The audible
alarm is combined with flashing of the red, Lo Q-RPT
Active LED on the HPMS (see Section 3.2.5, 3.3.1).
AutoTest in/out of tolerance
reading
Ascending triad/descending triad (see Section 3.3.10).
GENERAL OPERATING PRINCIPLES
3.2.1
PRESSURE READY/NOT READY
There is a Ready/Not Ready indicator LED on the RPM4 front panel. It is intended to provide
the user with a clear and objective indication of when a stable pressure has been achieved.
Ready is indicated when the current stability (rate of change) of pressure is less than the
stability limit. The user can set the stability limit (see Section 3.4.3) and the stability limit can
be set automatically by a AutoRange or AutoTest (see Section 3.3.4, 3.3.10). The Ready
indication is often used when comparing the RPM4 and a test device to indicate when a valid
reading can be made.
The Ready/Not Ready LED indications are:
<Green >
Pressure Ready
The pressure stability is within the stability limit.
<Red>
Pressure Not Ready
The pressure stability is NOT within the stability limit.
© 2007 DH Instruments, a Fluke Company
Page 18
3. OPERATION
3.2.2
GAUGE MODE, DYNAMIC COMPENSATION FOR
ATMOSPHERIC PRESSURE
The RPM4 A70M/A20M-AF Q-RPTs are intrinsically absolute but they are also used for gauge
measurement mode (see Section 3.3.3,  PRINCIPLE). Gauge measurement mode is achieved by
subtracting the value of atmospheric pressure, Poffset,G, from the Q-RPT’s absolute reading
using AutoZ (see Section 3.2.2). The AutoZ routine that measures Poffset,G, is run by pressing
[AutoZ] whenever RPM4 is in the vented condition. This assures the continuous updating of the
Poffset,G value corresponding to atmospheric pressure. Gauge pressure is the measured absolute
pressure, Pu, minus the atmospheric offset, Poffset,G.
Pgauge = Pu - Poffset,G
However, atmospheric pressure may change between opportunities to run AutoZ and update
the value of Poffset,G, for example when running an extended test without venting. RPM4 uses
dynamic compensation for atmospheric pressure to correct for changes in atmospheric
pressure between opportunities to run AutoZ and update Poffset,G. When AutoZ runs, and
Poffset,G is determined, the reading of RPM4’s on board barometer, Patm,0, is also recorded.
Later, when no longer vented, the change in atmospheric pressure, ΔPatm, since Poffset,G was
updated, is the difference between the current barometer reading, Patm, and the barometer
reading at the time of AutoZ execution, Patm,0:
ΔPatm = Patm - Patm,0
Dynamic compensation for atmospheric pressure uses ΔPatm to correct the value of Poffset,G,
thus always compensating real time for changes in atmospheric pressure:
Pgauge = Pu - Poffset,G - ΔPatm
The additional uncertainty in gauge pressure mode due to the dynamic compensation for
atmospheric pressure technique is a function of the resolution and short term stability of the
on-board barometer, not its absolute measurement uncertainty. This additional uncertainty is
completely insignificant in the range of pressure covered by the RPM4 A70M/A20M-AF.
3.2.3
MULTIPE RANGES (Q-RPTS, AUTORANGE AND INFINITE
RANGING)
RPM4 A70M/A20M-AF has two Quartz Reference Pressure Transducers (Q-RPTs). The A70M
(10 000 psi) Q-RPT is designated the Hi Q-RTP. The A20M (3 000 psi) Q-RPT is designated
the Lo Q-RTP. Which Q-RPT is currently active is continuously by characters in the upper
right hand corner of the MAIN RUN screen and most other screens.
Each RPM4 Q-RPT has a default range which is its maximum range. Additional ranges, lower
than the Q-RPT’s maximum, may also be created using AutoRange and AutoTest (see
Section 3.3.4, 3.3.10). Ranges created using AutoRange are temporary but may be saved with
all their settings for reactivation (see Section 3.4.1.1).
An RPM4 range is identified by a range screen showing the Q-RPT used by the range, its current unit
of measure and its full scale pressure in gauge and absolute measurement modes. The range
screen is:
1.
Q-RPT designator.
2.
Type of range. DF for the Q-RPT’s default range; AR for a range
created by AutoRange.
3.
Q-RPT position designator.
4.
Current pressure unit of measure.
5.
Full scale pressure in current unit of measure in gauge (<g>) and/or
absolute (<a>) measurement mode.
Active A70M
DF Hi
psi 10000g/10000a
Page 19
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
The ranges available on the RPM4 are accessed using [RANGE] (see Section 3.3.1) and/or
created using [AutoRange] (see Section 3.3.4).
Most settings made in an RPM4 range, such as unit of measure, measurement mode, display
resolution, and stability setting are specific to the range. Settings selected while one range is
active apply to that range and not to other ranges. The range specific settings are stored with
the range and recalled whenever the range is made active. This makes setting up ranges a
convenient way to store and recall frequently used operating configurations. See Table 2 for a listing
of RPM4 adjustments and settings and whether they are range, Q-RPT or system specific.
Table 2. Settings and what they are specific to
(range, measurement mode, Q-RPT, system)
SETTING
PURPOSE
SPECIFIC TO
SECTION
[UNIT]
Set pressure unit of measure
Range
3.3.2
[MODE]
Set pressure measurement mode
(absolute, gauge)
Range
3.3.3
[DISPLAY]
Set bottom line display function
System
3.3.6
[HEAD]
Set fluid head correction height, fluid, unit
of measure
System
3.3.7
[AutoZ]
Run AutoZ
Q-RPT and measurement mode
3.3.9
Resolution
Set pressure display resolution
Range
3.4.2
Stability
Set Ready/Not Ready stability test.
Range
3.4.3
Upper Limit (UL)
Set upper limit alarm
Range and measurement mode
3.4.4
AutoZ
AutoZ, ON/OFF, set and view values
Q-RPT and measurement mode
3.5.1
Screen Saver,
Sound, Time,
ID, Level
Set system user preferences
System
3.5.5
Cal
Various Q-RPT and barometer calibration
functions, including turning off absolute and
negative gauge modes
Q-RPT or barometer
3.5.8
3.2.4
AUTOMATED TEST AND CALIBRATION SEQUENCES
The RPM4 AutoTest function supports “Quick” and “File” automated calibration sequences.
These automatically AutoRange the RPM4, setting its resolution, stability limit and upper limit
based on the characteristics of the device under test. They also prompt the user through the
increments of the calibration sequence and log calibration data. The AutoTest function
should be used for most common calibration tasks, especially calibration of analog pressure
gauges (see Section 3.3.10).
3.2.5
HPMS (HIGH PRESSURE MOUNTING SYSTEM)
The HPMS (high pressure mounting system) holds the RPM4 at a convenient viewing angle
and includes a valve and visual indicators to isolate and protect the RPM4’s 2 000 psi (A20M)
Q-RPT when using the 10 000 psi (A70M) Q-RPT.
See Figure 10 for an HPMS schematic.
 OPERATION
Numerical references in this Section refer to Figure 9.
In normal use, the operator’s only interaction with the HPMS is to operate the isolation valve
knob to connect and disconnect the Lo Q-RPT from the TEST port. The valve’s operation is
prompted by the Valve Position LEDs (2, 4).
© 2007 DH Instruments, a Fluke Company
Page 20
3. OPERATION
The Lo Q-RPT isolation valve (3) isolates and protects the Lo Q-RPT from the TEST port
when it is closed (knob fully CCW) and opens the Lo Q-RPT to the TEST port when it is open
(knob fully CW).
The Valve Position LEDs (2, 4) indicate the position in which the valve knob should be set
based on the current Q-RPT selection on the RPM4. If the Hi Q-RPT is selected, the LO QRPT SHUT OFF LED (2) is lit indicating that the valve knob should be turned fully CW to
close the valve, protecting the Lo Q-RPT from high pressure. If the Lo Q-RPT is selected,
the LO Q-RPT ACTIVE LED (4) is lit indicating that the valve knob should be turned fully
CCW to open the valve, connecting the Lo Q-RPT to the test pressure.
The HPMS isolation valve (3) must always be in the closed position (knob fully CCW) when
operating at pressure greater than 3 000 psi (20 MPa).
The CAUTION LO Q-RPT ACTIVE LED (5) is used to indicate that the Lo Q-RPT is active and
provide an alert when the Lo Q-RPT is active but a Hi Q-RPT range is selected on the RPM4.
The CAUTION LO Q-RPT ACTIVE LED (5) is driven by the value of pressure currently measured
by the Lo Q-RPT , it is not driven by the valve position as there is no sensing of the valve position.
The CAUTION LO Q-RPT ACTIVE LED (5) has three possible conditions:
•
LED is OFF: The Lo Q-RPT is NOT active. The Lo Q-RPT is considered active when it
measures a pressure greater than about 30 psig (200 kPa).
•
LED ON continuously: The Lo Q-RPT IS active and the Lo Q-RPT is selected on
the RPM4. The LED is lit as a reminder that the Lo Q-RPT is active and pressure over its
maximum working pressure of 3 000 psi (20 MPa) should not be applied.
•
LED is flashing ON/OFF accompanied by high frequency beeps and <!!LO Q-RPT
ACTIVE!!> displayed by RPM4: Lo Q-RPT IS active and the Hi Q-RPT is selected on
RPM4. The Lo Q-RPT should NOT be exposed to pressure when the Hi Q-RPT is
selected. Exposing the Lo Q-RPT to pressures for which the Hi Q-RPT is normally used,
will overpressure and damage the Lo Q-RPT Vent pressure from the RPM4 and shut off
the Lo Q-RPT with the Lo Q-RPT shut off valve before continuing to use the Hi Q-RPT.
If the Hi RPT is selected with the Lo Q-RPT active, RPM4 goes into an alarm condition to avoid
accidental overpressure of the Lo Q-RPT while using a Hi Q-RPT. The pressure on the Lo Q-RPT must be
reduced to less than 30 psig (200 kPa) so that the CAUTION LO Q-RPT ACTIVE LED is OFF before
shutting the Lo Q-RPT shut off valve and selecting the Hi Q-RPT.
The HPMS pressure relief valve (Figure 10, Ref 3) is set to open at 110 % of the RPM4 Lo
Q-RPT maximum range. When the pressure applied to the Lo RPT reaches approximately
3 300 psi (23 MPa), the pressure relief valve will open exhausting gas to atmosphere and
reducing pressure. Prior to opening the pressure relief valve, the RPM4 will have gone into
an overpressure condition (see Section 3.4.4.1). If an overpressure condition occurs, reduce
pressure as soon as possible. The pressure relief valve will reseat automatically and close
when pressure is reduced.
Do NOT overpressure the Lo Q-RPT. The Lo Q-RPT may be damaged beyond repair by
pressure greater than 3 300 psi (23 MPa). Q-RPT damage from overpressure is logged in user
and factory maintenance pages and is not covered by the product warranty. The HPMS pressure
relief valve should only be considered a last resort means of protecting the Lo Q-RPT. Following
proper operating procedures, the Lo Q-RPT should never be overpressured.
Page 21
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
1. RPM4 A70M/A20M-AF Reference Pressure Monitor
2. Lo Q-RPT shut-off valve position LED
3. Lo Q-RPT shut-off valve
4. Lo Q-RPT active valve position LED
5. Lo Q-RPT active caution LED
Figure 9. RPM4/HPMS front view
© 2007 DH Instruments, a Fluke Company
Page 22
3. OPERATION
1. HPMS TEST port (DH500 F)
2. Connection to RPM4 Lo Q-RPT (A20M)
(3 000 psi)
3. Lo Q-RPT pressure relief valve (3 300 psi)
4. Lo Q-RPT shut off valve
5. RPM4 A70M/A20M-AF
Reference Pressure Monitor
6. Connection to RPM4 Hi Q-RPT
(A70M) (10 000 psi)
Figure 10. HPMS pneumatic schematic
Page 23
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
3.2.6
DIRECT FUNCTION KEYS SUMMARY
Table 3 provides a brief summary of RPM4 direct function key operation. It may be useful to
keep a copy of this summary near the RPM4/HPMS, especially when first becoming acquainted with its
operation.
Local operation of RPM4 is through the front panel keypad. To minimize multi-layered menu
structures, the keypad numerical keys also provide direct access to the most commonly used
functions. The function accessed is labeled on the bottom half of the key. Direct function
keys are active whenever RPM4 is in its MAIN RUN screen. Table 3 summarizes the
operation of the direct function keys.
Table 3. Summary of RPM4 function key operation
DIRECT FUNCTION KEYS ARE ACTIVE FROM THE MAIN RUN SCREEN
See corresponding manual Sections for full detail.
Adjust height of fluid head
correction. Set to zero to defeat
correction.
View active range and toggle
through available ranges. [ENT] on
a range activates it.
The SDS function is not used in
the A70M/A20M-AF configuration
of RPM4.
Select pressure unit of measure for
the active range. Choice of units
available in this menu can be
customized.
Run the AutoZ function to
AutoZero the active Q-RPT and
measurement mode.
Select the pressure measurement
mode for the active range (absolute,
or gauge).
Set up and optimize RPM4
features for a specific operating
range and measurement mode.
Menu of less commonly used internal
functions and settings.
Run automated
routine.
Menu of commonly used setup
features
including
save/delete
AutoRange ranges, set display
resolution, set stability limit, set
upper/lower, set up File AutoTest
sequences and view AutoTest data.
leak
checking
Select the display function for the
bottom line of the RPM4 display.
3.3
Start or set functions such as Leak
Check, AutoTest and Freeze.
ENTER values when editing.
DIRECT FUNCTION KEYS
3.3.1
[RANGE]
 PURPOSE
To view and/or change the active pressure measurement range and associated settings.
 PRINCIPLE
An RPM4 range is defined as a pressure span and associated settings (see Section 3.2.3).
An RPM4 may have multiple ranges. Each Q-RPT in the RPM4 system has a default range
which is its maximum span. The default ranges of the RPM4 A70M/A20M are 10 000 psi
(A70M) and 3 000 psi (A20M). Additional ranges, lower than the Q-RPT’s maximum span,
may also be created using AutoRange (see Section 3.3.4) or AutoTest (see Section 3.3.10).
© 2007 DH Instruments, a Fluke Company
Page 24
3. OPERATION
Ranges created using AutoRange or AutoTest may be saved, with their settings, for
reactivation (see Section 3.4.1).
The [RANGE] function key allows the available RPM4 pressure ranges to be viewed and selected.
 OPERATION
Pressing the [RANGE] function key activates the range viewing and selecting function. When
the [RANGE] function key is first pressed, the active range is displayed. For example:
1.
Q-RPT designator.
2.
Type of range. DF for the Q-RPT’s default range; AR for a range
created by AutoRange.
3.
Q-RPT position designator.
4.
Current pressure unit of measure.
5.
Range’s full scale pressure in current unit of measure in gauge and/or
absolute measurement mode depending on type of Q-RPT and range.
Active A20M
DF Lo
psi 3000g/3000a
Pressing the [+/-] key or the [RANGE] key again while in the RANGE functions toggles
through displays of the other available ranges, from lowest range to highest range.
To select a range to become the active range, press [ENT] while the range is displayed.
Any time a range change causes the active Q-RPT to change, the HPMS Lo Q-RPT
Isolation valve must be operated to connect or disconnect the Lo RPT from the TEST port.
The green Lo Q-RPT Valve Position LEDs indicate the correct position of the Lo Q-RPT
Valve Isolation Knob based on the RPM4 Q-RPT currently in use (see Section 3.2.5).
Pressing [ESC] while in the RANGE function returns to the MAIN RUN screen without
making a range change.
The HPMS Lo Q-RPT Isolation valve protects the Lo Q-RPT (3 000 psi max) from
overpressure when the Hi RPT is in use. Familiarize yourself with HPMS operation (see Section
3.2.5) before changing ranges and applying pressures. Always turn the Lo RPT Isolation Valve fully
in the direction of the lighted green LED before applying pressure.
Range full scale limits are given in the pressure unit that is currently active for that range.
Pressing [+/-] from the MAIN RUN screen provides a shortcut to a momentary view of the
active range.
Many RPM4 settings and functions are range specific. See Table 2 for identification of
range specific settings.
For best metrological performance, vent the RPM4 Q-RPT before changing ranges.
Page 25
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
3.3.2
[UNIT]
 PURPOSE
To select the unit of measure in which RPM4 displays pressure values.
To select the measurement mode (absolute, gauge), use [MODE] (see Section 3.3.3).
 PRINCIPLE
RPM4 allows the unit of measure in which pressure values are displayed to be changed.
RPM4 A70M/A20M-AF supports 13 standard pressure units of measure as well as user
defined units. To simplify operation, quick access to six units is made available under the
[UNIT] key. The [UNIT] key contents can be customized by the user to any configuration of
six units (see Section 3.5.6).
Internally, RPM4 always operates in Pascal (Pa), the SI unit of pressure. Values of pressure
are represented in other units by the application of conversion factors to convert from Pa (see
Section 7.1.1).
 OPERATION
To change the active pressure unit of measure for a
range, press [UNIT] from the MAIN RUN screen while
the range is active. The display is:
1psi 2MPa 3kPa
4bar
The cursor is on the number corresponding to the active pressure unit of measure for the active range.
To change the pressure unit of measure, select the desired unit. Making the selection returns
to the MAIN RUN screen with the selected unit active.
The pressure unit of measure selected is range specific. When in a given range, all functions
and settings are represented in the current measurement unit for that range. However, certain
internal and/or metrological functions (e.g., Q-RPT calibration coefficients) are always represented
in Pa regardless of the current range unit.
See Section 7.1.1 for tables of the conversion factors used by RPM4.
If the pressure unit selected is inWa (inches of water), the reference temperature for water
density must we specified in a separate menu (choices are 4ºC, 20ºC 60ºF). No reference
temperature selection is necessary for the unit mmWa as the only reference temperature
commonly used for mmWa is 4 ºC.
The choice of up to six units available under the UNIT function can be customized from a
wider selection by the user (see Section 3.5.6). The units available under the UNIT function can be
reset to default by reset (see Section 3.5.9.2).
© 2007 DH Instruments, a Fluke Company
Page 26
3. OPERATION
3.3.3
[MODE]
 PURPOSE
To set the measurement mode (absolute, gauge) for the active range.
To select the unit of measure, use [UNIT] (see Section 3.3.2).
 PRINCIPLE
RPM4 A70M/A20M-AF supports simple, one-step switching between two measurement
modes:
Absolute
Measures pressure relative to vacuum (zero is hard vacuum). Range is
from zero absolute to full scale.
Gauge
Measures pressure relative to atmosphere (zero is ambient pressure).
Range is from zero gauge to full scale, full scale must be greater than zero.
The RPM4 A70M/A20M-AF Q-RPTs measure pressure relative to a sealed vacuum reference
and are intrinsically absolute. Gauge mode is accomplished by offsetting of atmospheric
pressure with dynamic compensation for atmospheric pressure changes between offsets
using an on-board barometer (see Section 3.2.2). Access to absolute operation can be
turned OFF (see Section 5.3.5).
When changing modes for a range, if the full scale of the range is 100 psi (700 kPa) or greater,
the full scale is the same in both absolute and gauge modes. If the full scale is less than 100 psi,
the gauge mode full scale is 14.5 psi (100 kPa) lower than the absolute mode full scale.
Measurement mode selection is range specific.
 OPERATION
To change the active measurement mode for a range,
press [MODE] from the MAIN RUN screen while the
range is active. The display is:
Measurement mode:
1absolute 2gauge
Select the desired measurement mode and operation returns to the main run screen with the
selected measurement mode active. If absolute measurement mode has been turned OFF in
calibration (see Section 5.3.5), absolute mode is not available.
Certain RPM4 settings, including AutoZ ON/OFF (see Section 3.5.1) are range AND
measurement mode specific. See Table 2 for a listing of settings and what they are specific to.
Absolute mode capability can be turned OFF in the calibration function (see Section 5.3.5).
When absolute mode is turned OFF, only gauge mode can be activated. <Gauge mode only, other
modes OFF> is displayed when [MODE] is pressed.
3.3.4
[A UTO R ANGE ]
 PURPOSE
To automatically set up RPM4 to optimize its measurement characteristics and features for a
specific, user defined pressure range of operation.
Page 27
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
 PRINCIPLE
RPM4 A70M/A20M-AF is designed to support the calibration and test of a very wide variety of
test ranges in absolute and gauge measurement modes.
The AutoRange function simplifies the task of selecting the Q-RPT best suited to cover a
specific test range and setting measurement parameters appropriately for that specific range.
These are set automatically based on operator entry of desired measurement mode, pressure unit
of measure and range full scale. The selections and settings made by AutoRange are summarized
in Table 4.
A range set up using AutoRange and all its range specific settings, may be saved for recall
using [SETUP], <1range> (see Section 3.4.1). Saved ranges are available for later selection
using [RANGE] (see Section 3.3.1). If a range created by AutoRange is not saved, it is
overwritten by the next AutoRange or erased when another range is selected.
Press [ENT] from the main run screen in Rate DISPLAY mode to use the [AutoTest]
function to AutoRange RPM4 based on DUT tolerance (see Section 3.3.10).
Table 4. Settings made by AutoRange
SETTING/
SELECTION
PURPOSE
SETTING BY
[AUTORANGE]
SETTING BY
[AUTOTEST[
(see Section 3.3.10)
RELATED
SECTION
Unit
Set pressure unit of
measure
Operator specified
during AutoRange
Operator specified in
AutoTest definition
3.3.2
Mode
Set pressure
measurement mode
(absolute, gauge)
Operator specified
during AutoRange
Operator specified in
AutoTest definition
3.3.3
Full scale
Establish span
maximum
Operator specified
during AutoRange
Maximum pressure of
AutoTest definition
None
Q-RPT
Select most
appropriate Q-RPT to
cover range and mode.
Q-PRT with lowest
default full scale that is
greater than the
AutoRange full scale
Q-PRT with lowest
default full scale that is
greater than the
maximum pressure of
AutoTest definition
1.2.2.1
Upper limit
Set maximum pressure
alarm limit.
105 % of AutoRange
full scale pressure
105% of maximum
pressure of AutoTest
definition
3.4.4
Resolution
Set display resolution
10 ppm of AutoRange
span or
1 ppm of default QRPT span, whichever is
larger
10% of DUT tolerance
or
1 ppm of default QRPT span, whichever is
larger.
3.4.2
Stability Limit
Set Ready/Not Ready
stability criterion.
50 ppm of AutoRange
span or 2 ppm of
default Q-RPT span,
whichever is larger
10% of DUT tolerance
or
2 ppm of default QRPT span, whichever is
larger
3.4.3,
3.2.1
© 2007 DH Instruments, a Fluke Company
Page 28
3. OPERATION
 OPERATION
To use the AutoRange function, press [AutoRange] and respond to the RPM4’s prompts.
Select AutoRange measurement mode: The screen is identical in appearance and
function to the [MODE] screen (see Section 3.3.3).
Select pressure unit of measure: The screen is identical in appearance and function
to the [UNIT] screen (see Section 3.3.2).
Enter the AutoRange full scale pressure: Enter the full scale pressure value in the
<------> entry field and press [ENT]. If the full scale value entered cannot be covered by
RPM4, an error message appears. If the full scale value can be covered, AutoRange
proceeds to the range display.
View proposed AutoRange range: The proposed AutoRange range screen is:
1.
Indication that this is a screen of the proposed AutoRange range.
2.
Designator and position of the Q-RPT that AutoRange has selected
to cover the AutoRange full scale and measurement mode.
3.
Pressure unit of measure specified in AutoRange.
4.
AutoRange full scale pressure in gauge mode and absolute.
AutoRange A70M
psi 5000g/5000a
If AutoRange selects a Q-RPT but you would like to use the other one, the [ ] and [
control keys may be used to toggle between Q-RPTs so that the other can be selected.
Hi
] cursor
Accept proposed AutoRange: To accept the proposed AutoRange and go to the MAIN
RUN screen with the new AutoRange range active, press [ENT] or [AutoRange]. To
modify the AutoRange full scale, measurement mode or pressure unit of measure, use
[ESC] to back through the AutoRange screens and make changes.
The HPMS Lo Q-RPT Isolation Valve protects the Lo Q-RPT (3 000 psi max) from
overpressure when the Hi Q-RPT is in use. Familiarize yourself with HPMS operation (see Section
3.2.5) before changing ranges and applying pressures. Always turn the Lo Q-RPT Isolation Valve
fully in the direction of the lighted green LED before applying pressure.
To verify or confirm the range from the MAIN RUN screen, use [+/-] or [RANGE] to view the
active range (see Section 3.3.1).
See Table 4 for a listing of all selections and settings affected by AutoRange and their values.
3.3.5
[LEAK CK]
 PURPOSE
To run an automated leak check routine that determines the leak rate of the system
connected to the RPM4/HPMS TEST port.
 PRINCIPLE
The LEAK CHECK function is provided as a means of checking and quantifying the leaks that
may be present in the system connected to the RPM4/HPMS TEST port.
Page 29
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
The principle of the LEAK CHECK function is the measurement of the natural decrease or
increase of pressure in a fixed volume over time. The LEAK CHECK function allows a leak
check time to be set. The total pressure change and the average rate of change over the
leak check time are calculated and displayed.
 OPERATION
To run a leak check, first set the pressure to the desired leak check pressure.
Changing the pressure in a test system causes adiabatic temperature changes in the
pressurized medium that need to have dissipated before a valid leak measurement can be made.
In general, a 0.5 to 1 minute wait before running a leak check is adequate to allow the adiabatic
temperature change to dissipate and valid leak measurements to be made. However, stabilization
time may be much longer for large pressure changes and as volume and pressure increases.
To access the LEAK CHECK function, press [LEAK CHECK] from the MAIN RUN screen.
Select <1run> to run a leak test. The display is:
1.
Edit field for the time over which the leak rate will be
determined, in seconds.
Set leak check time:
15 s
Edit the leak check time if desired (minimum 1, maximum 999 seconds) and press [ENT].
Press [ENT] again when ready to start the leak test. The leak test display is:
1.
Standard MAIN RUN screen first line showing measured
pressure.
2.
Active Q-RPT position indicator
3.
Indication that leak test is running and countdown of time
remaining.
4566.8 psi g
Leak testing
Hi
13 s
[ESC] can be used to abort the running leak test. [ENT] while the leak test is running restarts
the leak check timer.
When the leak check timer countdown has completed,
RPM4 beeps three times and the leak check results screen is displayed:
1.
Total pressure change from start to finish of leak check time.
2.
Indicator of Q-RPT used to run the leak check.
3.
Average rate of change of pressure over the leak check
time period (∆P/time in seconds).
∆P - 0.12 psi g Hi
Rate 0.008 psi/sec
From the leak check results screen, press [ENT] to repeat the leak test.
Press [ESC] to return to leak check main menu and exit to the MAIN RUN screen.
To view the results of the most recently completed leak check, press <2view>. If NO leak
check data is stored (i.e., if the RPM4 has never run a leak test or a reset has cleared
previous leak test results), the results screen displays <Data NOT available> briefly and
returns to MAIN RUN screen. Press [ENT] or [ESC] to return to the MAIN RUN screen.
© 2007 DH Instruments, a Fluke Company
Page 30
3. OPERATION
Leak check is range specific in the sense that a leak check is run using the active range.
However, only one set of leak check results is maintained in memory and each leak test completed
overwrites the memory. View leak check always shows the results of the last leak check run
regardless of the range that is now active. The results screen includes the range indicator to
indicate the range in which the leak check was run.
3.3.6
[DISPLAY]
 PURPOSE
To select, from a variety of choices, the information that is displayed on the second line of the
RPM4 display.
 PRINCIPLE
RPM4 supports a variety of advanced pressure measurement functions that are displayed on
the second (bottom) line of the RPM4 display. In summary, the available display functions
included are:
AVERAGE
Calculates the average measured pressure over a user specified period of
time and displays the average, the standard deviation about the mean and a
countdown in seconds to the next average (see Section 3.3.6.1). This function is
often used to filter out pressure noise in an unstable system. The magnitude of
the noise is quantified by the standard deviation about the mean. A second Avg
screen allows the instantaneous pressure values to be viewed during an
averaging cycle.
RATE
Calculates and displays the current rate of change of pressure in current
pressure units/second (see Section 3.3.6.2). This function is a useful
indication of the stability of the pressure being measured. It is often used as
an indication of positive or negative leak rate and as a go/no go criterion of
when to take data when comparing RPM4 and a device under test, for
example in a calibration. Rate is used by the Ready/Not Ready function to
determine when a Ready condition exists (see Section 3.2.1).
DEVIATION
Continuously calculates and displays the difference between the pressure
measured by RPM4 and a target pressure entered by the user (see Section
3.3.6.3). This function is useful in monitoring the evolution of pressure around
and/or away from a desired set point.
RPT
Allows pressure measurement from the RPM4’s two Q-RPTs to be displayed
simultaneously (see Section 3.3.6.4).
HI/LO
Records and displays maximum and minimum pressures measured (see
Section 3.3.6.5). This function is used to keep track of the minimum and
maximum pressure observed in a system over a period of time or to monitor
if a pressure min/max limit has been exceeded..
FREEZE
Captures and displays the pressure measured by the active range of RPM4
when the [ENT] key is pressed (see Section 3.3.6.6). This function is useful
to record the pressure present at the time of an operator observed trigger
event, for example when the needle of an analog gauge is on the nominal
point or when a switch activates.
CLEAN
Blanks out the second line of the display (see Section 3.3.6.7). This function
is used when a simple display of pressure measured by the RPM4 active
range with minimal additional information is desired.
Page 31
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
 OPERATION
To set the DISPLAY function press [DISPLAY] from the main run screen.
1avg 2rate 3dev 4RPT
5HiLo 6freeze 7clean
The display is:
The cursor is on the active DISPLAY function. Selecting a DISPLAY function returns to the
main run screen with the selected function active. See Sections 3.3.6.1 to 3.3.6.7 for
information on each of the DISPLAY choices.
The DISPLAY selection is NOT range specific. A DISPLAY selection made in one range
applies to all ranges.
The default DISPLAY function is Rate which causes the second line of the display to show “R”
followed by the current rate of change of pressure in current pressure units per second.
3.3.6.1
AVG (AVERAGE)
 PURPOSE
To activate the Average DISPLAY and/or adjust the period of time over which
averaging occurs.
See Section 3.3.6.  Principle.
 OPERATION
To access the Average DISPLAY, press [DISPLAY], <1Avg>. The display is:
1.
Edit field for averaging period in seconds.
Default is 20. Minimum 1, maximum 999.
Averaging Period:
20 s
Edit the averaging time period if desired. Press [ENT] to return to the main run
screen with the Average DISPLAY active.
With the Average DISPLAY active the main run screen is:
1.
Average measured pressure
completed averaging period.
2.
Standard deviation in active pressure unit of
measure of last completed averaging period.
3.
Countdown in seconds until completion of ongoing averaging period.
© 2007 DH Instruments, a Fluke Company
Page 32
over
last
3001.57 psi a
Hi
δ 0.03
18Avg
3. OPERATION
The Average DISPLAY has a second screen that allows the instantaneous
pressure readings to be viewed while an averaging cycle is running.
The instantaneous Average screen is:
1.
Instantaneous pressure values at RPM4’s
normal update rate.
2.
Current rate of change of pressure in active
pressure unit/second.
3.
Countdown in seconds until completion of ongoing averaging period.
3001.51 psi a
Hi
R 0.01
18Avg
The [+/-] key toggles between the main run Average screen and the
instantaneous values Average screen.
Pressing [ENT] while in the Average DISPLAY aborts the current averaging
period and causes a new one to begin. [ENT] can thus be use to trigger a new
averaging period on demand.
In the Average DISPLAY the Ready/Not Ready indication applies to the result
of the previous averaging period (see Section 3.2.1).
Ready indicates that all
readings during the previous averaging period met the stability criterion. Not Ready
indicates that one or more readings were outside of the stability criterion.
Changing the pressure unit of measure, measurement mode or range while the
averaging screen is active, starts a new averaging period.
To go to a DISPLAY other than Average, press [DISPLAY] and make a new
DISPLAY choice (see Section 3.3.6).
3.3.6.2
Rate
 PURPOSE
To activate the Rate DISPLAY.
See Section 3.3.6,  Principle.
The AutoTest function (see Section 3.3.10) to AutoRange RPM4 based on DUT
characteristics and run an automated test sequence is accessed by pressing [ENT]
from the Rate run screen.
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
 OPERATION
To activate the Rate DISPLAY press [DISPLAY], <2Rate>. Pressing <2Rate>
returns to the main run screen with the Rate DISPLAY active.
With the Rate DISPLAY active the main run screen is:
1.
Current rate of change of pressure in current
pressure unit per second.
8455.25 psi a
R 0.03/sec
Hi
The Rate DISPLAY is different and separate from the stability setting which is
used to set the stability criterion on which the Ready/Not Ready indication is based
(see Sections 3.4.3 and 3.2.1). The Rate DISPLAY only causes the current rate of
change to be displayed and has NO affect on the stability setting or the Ready/Not
Ready condition.
The Rate DISPLAY is the default RPM4 main run screen display.
To go to a DISPLAY other than Rate, press [DISPLAY] and make a new
DISPLAY choice (see Section 3.3.6).
3.3.6.3
Dev (Deviation)
 PURPOSE
To activate the Deviation DISPLAY and/or set the deviation target value.
See Section 3.3.6,  Principle.
 OPERATION
To activate the Deviation DISPLAY press
[DISPLAY], <3Dev>. The display is:
Target:
9000.0 psi a
Edit the desired target value. Pressing [ENT] returns to the main run screen with
the Deviation DISPLAY active using the entered target value.
The target value is the value from which deviations (D) are measured by the
Deviation DISPLAY following:
D = current pressure - target pressure
© 2007 DH Instruments, a Fluke Company
Page 34
3. OPERATION
With the Deviation DISPLAY active the main run screen is:
1.
Deviation of current pressure from the target
value.
2.
Target value.
8998.2
D -1.8
psi a zH3
T9000.0
Pressing [ENT] from the main run screen when the Deviation DISPLAY is active
goes directly to the Target editing screen. This allows the target value to be changed
and without going through the DISPLAY menu.
If the pressure measurement unit or mode is changed while the Deviation
DISPLAY is active the target value remains at the same numerical value. It is NOT
converted.
To go to a DISPLAY other than Deviation, press [DISPLAY] and make a new
DISPLAY choice (see Section 3.3.6).
3.3.6.4
RPT
 PURPOSE
To activate the RPT DISPLAY.
See Section 3.3.6,  Principle.
 OPERATION
For the sake of clarity, when describing the RPT DISPLAY, the Q-RPT displayed on
the top line of the display when the RPT function is selected is referred to as the “active”
Q-RPT. The other Q-RPT to be displayed on the second (bottom) line of the RPM4 display
is referred to as the “inactive” Q-RPT. It is “inactive” in the sense that all RPM4 functions
and settings such as UNIT and RES still apply to the “active” Q-RPT. To make changes to
the “inactive” Q-RPT, for example to change its pressure measurement unit, it must be
made the active Q-RPT by a conventional range change (see Section 3.3.1).
To activate the RPT DISPLAY, press [DISPLAY], <4RPT>. Operation returns to
the MAIN RUN screen with the inactive Q-RPT displayed on the display’s bottom
line. The range of the inactive Q-RPT is always the default range, not an
AutoRanged range (see Section 3.2.3).
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
With the RPT DISPLAY active the main run screen is:
1.
Active Q-RPT display.
2.
Inactive Q-RPT display with Ready/Not Ready
indicator on far left (<*> indicates Ready).
2010.66 psi a
*14.27 psi g
zHi
zLo
When the RPT display is active, executing a range change to a range on the
inactive Q-RPT makes the inactive Q-RPT the active Q-RPT. The DISPLAY defaults
back to Rate ( Section 3.3.6.2).
To go to a DISPLAY other than RPT , press [DISPLAY] and make a new DISPLAY
choice (see Section 3.3.6).
3.3.6.5
Hi/Lo
 PURPOSE
To activate the Hi/Lo DISPLAY.
See Section 3.3.6,  Principle..
 OPERATION
To activate the Hi/Lo DISPLAY press [DISPLAY], <5Hi/Lo>. Pressing <5Hi/Lo>
resets the Hi/Lo values and returns to the main run screen with the Hi/Lo
DISPLAY active.
With the Hi/Lo DISPLAY active the main run screen is:
1.
Highest pressure observed since Hi/Lo reset.
2.
Lowest pressure observed since Hi/Lo reset.
9989.2 psi a zHi
H 9991.5
L 9987.3
The Hi/Lo values change each time a new Hi or Lo pressure is observed.
The Hi/Lo record can be reset at any time by pressing [ENT]. This allows a
Hi/Lo reset without going back through the DISPLAY menu.
If the pressure measurement unit, mode or range is changed while the Hi/Lo
DISPLAY is active, Hi/Lo resets.
To go to a DISPLAY other than Hi/Lo, press [DISPLAY] and make a new
DISPLAY choice (see Section 3.3.6).
© 2007 DH Instruments, a Fluke Company
Page 36
3. OPERATION
3.3.6.6
Freeze
 PURPOSE
To activate the Freeze DISPLAY.
See Section 3.3.6,  Principle.
 OPERATION
To activate the Freeze DISPLAY press [DISPLAY], <6Freeze>. Pressing
<6Freeze> returns to the main run screen with the Freeze DISPLAY active.
With the Freeze DISPLAY active the main run screen is:
1.
Pressure measured by active range of RPM4
when [ENT] was pressed (displays 0.00 by
default when Freeze DISPLAY is first
activated).
4435.6 psi a
F 4420.7
zHi
Pressing [ENT] causes the current pressure measured by the active RPM4 Q-RPT
to be captured and displayed.
If the pressure measurement unit, mode or range is changed while the Freeze
DISPLAY is active, the Freeze value defaults back to zero.
To go to a DISPLAY other than Freeze, press [DISPLAY] and make a new
DISPLAY choice (see Section 3.3.6).
3.3.6.7
Clean
 PURPOSE
To activate the Clean DISPLAY.
See Section 3.3.6,  Principle..
 OPERATION
To activate the Clean DISPLAY press [DISPLAY], <7Clean>. Pressing <7Clean>
returns to the main run screen with the Clean DISPLAY active.
With the Clean DISPLAY active the main run screen is:
1.
Conventional main run screen first line.
2.
“Clean” second line.
99.76 psi a
zHi
To go to a DISPLAY other than Clean, press [DISPLAY] and make a new
DISPLAY choice (see Section 3.3.6).
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
3.3.7
[HEAD]
 PURPOSE
To cause a pressure fluid head correction to be added to or subtracted from the pressure
measured by the RPM4 reference pressure transducer in order to predict the pressure at a
height other than the RPM4/HPMS’s reference level.
 PRINCIPLE
RPM4/HPMS measures gauge or absolute pressure at the height of the rear panel TEST port.
Frequently, when performing a calibration or test, the device or system under test is at a different
height than the RPM4/HPMS’s TEST port. This difference in height, frequently called head, can
cause a significant difference between the pressure measured by the RPM4/HPMS at its TEST
port height and the pressure actually applied to the device under test which is at a different height.
In this case, it is useful to make a head correction to the pressure measured by the RPM4 in order
to predict the pressure actually applied at a different height.
RPM4 can accurately determine “head” pressures for gases (nitrogen, helium and air) and
liquids (oil, water) as the pressurized medium. In calculating the head value, standard gravity
(9.80665 m/s2) is used. Gas densities are calculated from the selected gas’s standard
density correcting for temperature of 20°C and the measured pressure using the gas’s
compressibility factor to 100 MPa (15 000 psi) and extrapolated above 100 MPa. Oil density
is taken to be 850 kg/m3, the density of typical calibration oils at 20°C. Water density is taken
to be 998.2321kg/m3 (20°C). A custom liquid density may also be specified.
The [HEAD] function key is used to specify the height difference between the RPM4/HPMS
TEST port and another height. Entering a height of zero turns the function off. The height
units and the test medium can be changed using [SPECIAL], <3Head> (see Section 3.5.3).
As a general rule with RPM4 A20M/A70M-AF, use of the HEAD function to assure in
tolerance measurements with RPM4 A70M/A20M-AF is necessary only when the head exceeds 10
in. (25 cm) if the medium is a gas.
 OPERATION
To access the HEAD function, press [HEAD]. The display is:
Edit head height:
+ 8 in
N2
1.
Edit field for head height.
2.
Test gas currently specified for the head correction.
Edit the head height to the desired value. Press [ENT] to return to the MAIN RUN screen
with the new head correction active. Press [ESC] to return with no changes.
The reference height of the RPM4
pressure measurement is the middle of the
RPM4 TEST port. The head height should be
entered as a positive value if the device or
system under test is higher than the RPM4
and negative if it is lower.
The HEAD function is NOT range specific. The HEAD ON or OFF status remains the same
as Q-RPTs and ranges are changed. Edits made to the head settings are independent of active
range or Q-RPT.
© 2007 DH Instruments, a Fluke Company
Page 38
3. OPERATION
When a head correction is being applied, it is indicated by <h> in the fourth character from
the right in the top line of the MAIN RUN screen (see Section 3.1.1). When the head correction is
zero, the <h> is not shown.
The default head height unit is inches and the fluid species is Nitrogen (N2).To change units
of head height between inches and centimeters and to change the test fluid species, use
[SPECIAL], <3head> (see Section 3.5.3).
3.3.8
[SDS]
 PURPOSE
The SDS function is not used in RPM4 A70M/A20M-AF.
3.3.9
[A UTO Z]
 PURPOSE
To run the AutoZ function that rezeros the active Q-RPT between full calibrations.
See Section 3.5.1,  Principle for a full explanation of the AutoZ function.
 PRINCIPLE
Run AutoZ is the function by which the current Q-RPT reading is compared to a reference,
Pstd,0, at atmospheric pressure to determine a new value of Poffset. The value of Poffset is then
used by AutoZ to automatically correct the Q-RPT for possible changes in zero over time
(see Section 3.5.1,  PRINCIPLE).
3.3.9.1
[AUTOZ] IN GAUGE MODE
 PURPOSE
To “rezero” the active Q-RPT in gauge measurement mode.
See Section 3.51,  Principle for a full explanation of the AutoZ function.
 OPERATION
For the AutoZ function key to run AutoZ, AutoZ must be turned ON for the
active range and measurement mode. AutoZ ON is indicated by <z> to the left of the
Q-RPT designator on the first line of the main run screen. AutoZ ON and OFF is set
using [SPECIAL], <1AutoZ> (see Section 3.51). If AutoZ is OFF for the active Q-RPT,
and measurement mode, <AutoZ is off> is displayed when [AutoZ] is pressed.
To run AutoZ in gauge measurement mode, use [MODE] to set gauge as the
measurement mode (see Section 3.3.3) and press [AutoZ] from the main run
screen. <Running gauge AutoZ> is displayed briefly before returning to the
main run screen.
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
Before running AutoZ in gauge mode, ensure that the pressure applied to the
Q-RPT is truly zero gauge (atmospheric pressure). If running AutoZ in gauge mode
results in a zero offset that RPM4 considers unusually large, <Confirm 0 gauge P!> is
displayed. Check that zero gauge pressure is applied to the Q-RPT module rear panel
TEST(+) port and the ATM port is open to atmosphere and unobstructed.
Allow the RPM4 to stabilize at atmospheric pressure and ambient temperature
for 2 to 3 minutes before running AutoZ in gauge mode.
3.3.9.2
[AUTOZ] IN ABSOLUTE MODE
 PURPOSE
To “rezero” the active Q-RPT in absolute measurement mode
See Section 3.5.1,  Principle for a full explanation of the AutoZ function.
 OPERATION
For the AutoZ function key to run AutoZ, AutoZ must be turned ON for the
active Q-RPT and measurement mode. AutoZ ON is indicated by <z> to the left of
the range designator on the first line of the main run screen. AutoZ ON and OFF is
set using [SPECIAL], <1AutoZ> (see Section 3.5.1). If AutoZ is OFF for the active
range, and measurement mode, <AutoZ OFF> is displayed when [AutoZ] is pressed.
To run AutoZ in absolute measurement mode, use [MODE] to set absolute
measurement mode (see Section 3.3.3) and press [AutoZ] from the main run
screen. The display is:
1.
Active Q-RPT designator.
2.
Current measurement mode (absolute).
3.
Selection of source of Pstd,0 reference to which
to AutoZ.
AutoZ Hi abs by:
13ntry 2COM2 3Lo RPT
Selecting <1entry> allows the value of Pstd,0 to be entered from the front panel keypad.
Selecting <2COM2> allows the value of Pstd,0 to be read automatically from another
DHI RPMx connected to RPM4’s COM2 communications port.
Selecting <3Lo RPT > is shown only if the Hi Q-RPT is active. This selection
allows the value of Pstd,0 for the Hi Q-RPT to be read automatically from the
RPM4s Lo Q-RPT.
Allow the RPM4 to stabilize at atmospheric pressure and ambient temperature
for 5 to 10 minutes before running AutoZ in absolute mode.
© 2007 DH Instruments, a Fluke Company
Page 40
3. OPERATION
If running AutoZ results in a value of Poffset that is greater than ± 0.005 % FS
of the span of the Q-RPT that is being AutoZeroed, the Q-RPT and/or the reference used
as the source of Pstd,0 may be out of tolerance or the AutoZ process may have been faulty.
Before activating a new Poffset greater than ± 0.005 % FS of the active Q-RPT, check to
be sure that both the Q-RPT and the reference were in good working order, properly
vented to stable atmospheric pressure, at the same height, and reading in the same
pressure units when AutoZ was run.
When the run AutoZ selection is made, if a HEAD correction is currently active (see
Section 3.3.7) the head correction is momentarily disabled while running AutoZ to
avoid “zeroing out” the head value.
The value of Poffset is always displayed and entered in Pascal (Pa).
Run AutoZ by Entry
Before running AutoZ in absolute mode, use <SETUP>, <2res> to set the
resolution of the active range to 0.001 or 0.0001%FS.
AutoZ by entry allows the value of Pstd,0 (see Section 3.5.1,  PRINCIPLE) to be
entered manually from the RPM4 front panel. This provides a simple way of
AutoZeroing relative to an independent reference device such as a house
barometer that does not interfaced directly with RPM4.
To run AutoZ by entry press [AutoZ], <1entry>. The display is:
1.
Real time pressure reading (without head
correction), pressure unit of measure and
measurement mode of the active Q-RPT.
2.
Active Q-RPT position designator.
3.
Entry field for the value of Pstd,0. in the current
pressure unit of measure.
14.03 psi a
Pstd,0:0.00
Hi
Enter the value of the AutoZ reference (Pstd,0) in the same unit of measure as the
top line display and press [ENT]. RPM4 logs the reading and calculates a new
AutoZ offset value. The next display is:
Press [ENT] to activate the new value of
Poffset or [ESC] to start over with entry of a
new AutoZ reference (Pstd,0) value.
Old Poffset: 0 Pa
New Poffset: 2745 Pa
The value of Poffset is always in Pascal (Pa). The value of Pstd,0 is entered in the
current pressure unit of measure.
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
Run AutoZ by COM2
AutoZ by COM2 allows the value of Pstd,0 (see Section 3.5.1  Principle) to be read
automatically from a DHI RPMx connected to the RPM4 COM2 communications
port. The RPMx is read and the new Poffset is calculated automatically.
To access run AutoZ by COM2 press [AutoZ], <2COM2>. The display is:
1.
Real time pressure reading (without head
correction), pressure unit of measure and
measurement mode of the active Q-RPT.
2.
Active Q-RPT position designator.
3.
Real time reading from the RPMx connected
to RPM4’s COM2 communications port.
14.03 psi a
Pstd,0:0.00
Hi
Observe the displayed pressures and verify that they are stable. When ready,
press [ENT] to cause AutoZ to run. RPM4 logs both readings and calculates a
new AutoZ offset value. The display is:
Press [ENT] to activate the new value of
Poffset or [ESC] to start over.
For RPM4 to
RPM4 and the
(see Section 3.5.2).
when running AutoZ
detected>.
Old Poffset: 0.0 Pa
New Poffset: 2745 Pa
communicate with an RPMx connected to its COM2 port, the
RPMx RS-232 interfaces must be set up properly
If, the RPM4 is unable to communicate with an RPMx via COM2
by COM2, it times out after 6 seconds and displays <RPM NOT
The value of Poffset is always displayed and entered in Pascal (Pa).
Run AutoZ by Lo RPT
AutoZ by Lo RPT is available only when the active Q-RPT is the Hi Q-RPT.
AutoZ by Lo RPT allows the Lo Q-RPT in an the RPM4 to serve as the AutoZ
reference (source of Pstd,0) (see Section 3.5.1,  PRINCIPLE).
The Lo Q-RPT is read and the new Poffset is calculated automatically.
To access run AutoZ by Lo Q-RPT press [AutoZ], <3Lo RPT >. The display is:
1.
Real time pressure reading (without head
correction), pressure unit of measure and
measurement mode of the active Q-RPT.
2.
Active Q-RPT position designator.
3.
Real time reading from the Lo Q-RPT.
14.03 psi a
Pstd,0: 14.08
Hi
Observe the displayed pressures and verify that they are stable. When ready,
press [ENT] to cause AutoZ to run. RPM4 logs both readings and calculates a
new AutoZ offset value. The display is:
Press [ENT] to activate the new value of
Poffset or [ESC] to start over.
Old Poffset: 0 Pa
New Poffset: -345 Pa
The value of Poffset is always displayed and entered in Pascal (Pa).
© 2007 DH Instruments, a Fluke Company
Page 42
3. OPERATION
3.3.10
[ENT] (RUN AUTOTEST)
 PURPOSE
To run the AutoTest function which runs a calibration test sequence (Quick Test or File Test).
Run AutoTest is accessed by pressing [ENT] from the Rate or Clean DISPLAY mode (see
Section 3.3.6). In other DISPLAY modes, the function of [ENT] is specific to the mode.
 PRINCIPLE
RPM4 supports AutoTest automated sequences to assist in the testing or calibration of
analog gauges and other pressure sensitive devices.
The AutoTest function is intended to:
•
AutoRange the RPM4 (see Section 3.3.4) to the range of the DUT being tested with
settings appropriate for the tolerance of the DUT.
•
Step the operator through a planned sequence of test pressure increments if desired.
•
Alert the operator to possible out of tolerance conditions at each test point.
•
Log test data in RPM4 that can be viewed following the test.
There are two types of AutoTest: Quick AutoTest and File AutoTest.
•
Quick AutoTest: The DUT and test parameters are entered “on the fly” during the
initialization of the test, then the test is executed if desired. In Quick AutoTest tests, the
test points are defined in % of test FS pressure.
•
File AutoTest: The DUT and test parameters are stored in a file (see Section 3.4.5.2) and
retrieved when a DUT is to be tested. In File AutoTests, test points are defined individually.
AutoTest operation is oriented towards running tests in which the pressure is set to the DUT
cardinal point indication and then the actual reference pressure present is read from the RPM4.
AutoTest Settings and Calculations
The data required to initialize an AutoTest is either entered “on the fly” (Quick AutoTest) or
retrieved from a file (File AutoTest). The data items required are:
•
Pressure measurement mode (gauge or absolute).
•
Pressure unit of measure.
•
DUT full scale in pressure unit of measure.
•
DUT tolerance in ± % FS (full scale).
•
Test increment in % FS (Quick AutoTest) or number of test increments and the value of
each increment in the pressure unit of measure (File AutoTest).
•
Test point sequence: ascending, descending or both (Quick AutoTest only).
The initialization data is used to AutoRange the RPM4 appropriately for the DUT and test to
be run. At the end of the AutoTest initialization, the RPM4 is AutoRanged as follows (see
Section 3.3.4, Table 4):
•
Q-RPT: The Lo Q-RPT is active if the maximum pressure in the AutoTest is less than
20 MPa (3 000 psi), the Hi Q-RPT is active if the maximum pressure in the AutoTest is
greater than 20 MPa (3 000 psi).
•
Pressure measurement mode and unit: As specified in the AutoTest initialization.
•
Display resolution: The DUT tolerance divided by 10 and rounded to the nearest digit, or
1 ppm of Q-RPT span, whichever is greater.
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
•
Stability test for Ready/Not Ready indication(see Section 3.2.1): The DUT tolerance
divided by 10, or 2 ppm of Q-RPT span, whichever is greater.
•
Upper limit (UL): The DUT full scale plus 5 %, or the Q-RPT’s maximum UL, whichever is
less (see Section 3.4.4).
To AutoRange the RPM4 based on DUT characteristics but not execute an AutoTest, the
AutoTest can be aborted just after the initialization. Then the RPM4 is set up appropriately
for the DUT to be tested but the AutoTest increments don’t execute.
See OPERATION in this Section for information on running a Quick or File AutoTest.
See Section 3.4.5.2 for information on setting up File AutoTest files.
See Section 3.4.5.1 for information on viewing the data files that result from running a File
AutoTest.
 OPERATION
To run an AutoTest, press [ENT] from the Rate, RPT
or Clean run screen (DISPLAY modes that do not use
[ENT] (see Section 3.3.6)). The display is:
Run AutoTest:
1Quick 2File
Select <1Quick> to run a Quick AutoTest or <2File> to run a File AutoTest (see PRINCIPLE
above in this Section).
If <2File> is selected, the File AutoTest file number must be specified (see Section 3.4.5.2).
The test is initialized automatically using the information in the File AutoTest file and test
execution begins with the <SET VALVE FOR RPT> screen (see Section 3.2.10.2).
If <1Quick> is selected, test initialization begins with the <Measurement mode:> screen
(see Section 3.2.10.1)
3.3.10.1
AUTOTEST INITIALIZATION
When <2File> is selected to run a File AutoTest, the test initialization information
is obtained from the file selected. Operation proceeds directly to the test
confirmation. The RPM4 asks the operator to confirm the range of the AutoTest
(<ENTER to run…>), AutoRanges (see Section 3.3.4) and operation proceeds
directly to test execution (see Section 3.3.10.2).
When <1Quick> is selected to run a
Quick AutoTest, the display is:
Run current Quick
AutoTest:
1yes 2no
This selection provides the choice between running the last Quick AutoTest,
including AutoRanging the RPM4 based on the previously entered DUT
characteristics or setting up a new Quick AutoTest definition. Select <1yes> to
rerun the last Quick AutoTest (see below in this Section). Select <2no> to define
a new Quick AutoTest.
When <2no> is selected from the <Run current Quick AutoTest> screen, the
AutoTest set-up/edit routine is accessed. The information needed to AutoRange
RPM4 based on the DUT characteristics is then collected in successive screens
as follows.
•
<Measurement mode:>: Select <1gauge> or <2absolute> depending on
the measurement mode of the DUT being tested (see Section 3.3.3).
•
<Pressure units of measure>: The units of measure screen from the [UNIT]
function key is presented (see Section 3.3.2). Select the desired pressure unit of
measure. The choice of units may be modified (see Section 3.5.6).
•
<DUT full scale:>: Enter the full scale pressure (maximum pressure) of the
DUT in the measurement mode and pressure units that have been specified
in the previous two steps.
© 2007 DH Instruments, a Fluke Company
Page 44
3. OPERATION
•
<DUT tolerance:>: Enter the DUT measurement uncertainty, accuracy or
precision specification as desired in ± % FS (percent of full scale). This value will
be used to determine appropriate RPM4 resolution and stability test settings.
•
<Test increment:>:
Enter the test increment in % FS of the DUT.
When executing the test, the test increments will be from zero to the DUT full
scale, dividing by the value of the increment. If a non-even increment value is
entered, the actual increments will be rounded to the lower number of
increments. For example, if the DUT full scale is 10 000 psi and the increment
specified is 42 %, the Sequence will run points of 0, 5 000 and 10 000 psi
because 42 % goes into 100 less than three but more than two times.
•
<Test point sequence:>: Select <1up> for the AutoTest sequence to run
from zero to the DUT full scale; <2down> for the sequence to start at the
DUT full scale and run down to zero, <3u&d> for the sequence to run from
zero to the DUT full scale and back to zero; <4d&u> for the sequence to run
from the DUT full scale down to zero and back to the DUT full scale.
After the last test definition entry, a screen is offered for the user to check that
the correct test has been defined or selected and that it does not exceed the
range of the device or system being tested. :
1.
Indication of minimum and maximum
pressure included in the sequence which is
about to run.
ENTER to run psi g
0.000 to 5000.0
Pressing [ESC] returns to the AutoTest selection screen without AutoRanging the
RPM4 and without sequence execution. Pressing [ENT] causes the RPM4 to
AutoRange based upon the DUT characteristics (see Section 3.3.4) and the
AutoTest proceeds to text execution (see Section 3.3.10.2). To AutoRange the
RPM4 based on DUT characteristics but not run a test sequence, [ESC] right
after AutoRanging completes (at the <Set valve for …> screen).
3.3.10.2
TEST EXECUTION
The last step of test initialization is to AutoRange the RPM4 (see Section
3.3.10.1), then test execution begins.
The first step of test execution is to set
the HPMS Lo Q-RPT isolation valve
correctly for the Q-RPT that will be used
to run the test (see 3.2.5). The RPM4
display is (<XX> is Lo or Hi):
Set valve for XX RPT
Set supply to DUT FS
Set the HPMS isolation valve to shut off or use the RPM4’s Lo Q-RPT as indicated
by the HPMS valve indicator LED (see Section 3.2.5). Turn the valve knob fully
towards the lit valve indicator LED until it reaches its stop. If using a GPC1 to adjust
pressure, set the GPC1 supply regulator so the GPC1 supply is equal to the DUT full
scale pressure (see the GPC1 Operation and Maintenance Manual). Press [ENT]
when ready to proceed with the test.
To abort the test but use the RPM4 with the settings for the DUT that was
initialized, press [ESCAPE] from the <SET VALVE FOR xx PRT> screen. This can be
useful for setting up the RPM4 to make DUT adjustments or run tests other than
the one defined by the AutoTest.
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
0.0 psi g
Lo
Exercise DUT & [ENT]
The display is:
The top line is the standard RPM4 run screen indicating the current measured
pressure (see Section 3.1.1). Exercise the DUT if desired using the top line indication
of the measured pressure and press [ENT] when complete.The display is:
1.
Standard RPM4 run screen indicating current
measured pressure.
2.
Number of this test point/the total number of
test points in the sequence.
3.
Pressure to set for this increment in current
pressure unit of measure and measurement
mode.
0.0 psi g
Set 0.0
Lo
1/11
Adjust the pressure to the <Set nnnn> value indicated. Set the pressure so
that the DUT, NOT the RPM4, indicates the <Set nnnn> value.
Once the specified pressure has been set, press [ENT]. If the RPM4 pressure
reading is in Not Ready condition (see Section 3.2.1), the RPM4 makes an
invalid entry sound and displays <Pressure NOT READY, TRY AGAIN>.
Correct the conditions that are causing the RPM4 reading to be excessively
unstable and press [ENT] again. If the RPM4 pressure reading is in Ready
condition, the RPM4 makes a valid entry sound and the display is:
1.
Standard RPM4 run screen indicating current
measured pressure.
2.
Number of this test point/the total number of
test points in the sequence.
3.
<F> to indicate freeze (see Section 3.3.6.7)
followed by the RPM4 pressure reading in
current units of measure captured when [ENT]
was pressed in the previous <Set> screen.
This is the reference pressure that was
applied to the DUT when the DUT indicated
the cardinal point. The frozen pressure value
flashes if the reading was out of tolerance
(definition of out of tolerance is: Set point –
RPM4 reading > DUT tolerance)..
497.7 psi g
F497.6
OT
Lo
2/11
Press [ENT] to accept this test point and proceed to the next test point or [←] to
repeat the point.
Repeat the set pressure, take reading and accept data procedure until all points
in the sequence have been accepted.
After the last pressure point in the sequence
has been accepted the display is:
AutoTest complete
1data 2new 3repeat
Select <1data> to view the data collected in the AutoTest that was just
completed (see Section 3.4.5.1).
Select <2new> to run a new Quick or File AutoTest.
Select <3repeat> to repeat the AutoTest that was just completed.
Press [ESCAPE] to return to the main run screen.
© 2007 DH Instruments, a Fluke Company
Page 46
3. OPERATION
3.4

[SETUP]
PURPOSE
[SETUP] accesses a menu of functions and features commonly used in setting up and using RPM4.

OPERATION
1range 2res 3stab
4UL 5ATest
To access the SETUP menu, press [SETUP] from the MAIN RUN
screen. The display is:
SETUP menu choices include:
<1range>
Save and delete ranges created by AutoRange (see Section 3.4.1).
<2res>
Adjust the resolution of pressure displays (see Section 3.4.2).
<3stab>
Adjust the pressure stability limit that is the criterion for the Ready/Not Ready indication
(see Section 3.4.3).
<4UL>
Adjust upper pressure limit alarm (see Section 3.4.4).
<5ATest>
Set up File AutoTest files and view data files resulting from running AutoTests (See
Section 3.4.5).
3.4.1
<1RANGE>
 PURPOSE
Save AutoRange ranges and associated settings for recall. Delete previously saved AutoRange ranges.
 PRINCIPLE
The RPM4 AutoRange function creates a range and automatically sets various operating
parameters proportionally to the range (see Section 3.3.4). Operating settings can then be
changed by the user. Many operating settings are specific to the current range (see Table 2).
[SPECIAL], <1range> allows the AutoRange range and associated settings to be saved for
recall using the [RANGE] key (see Section 3.3.1). This can avoid having to recreate
frequently used ranges and settings.
[SPECIAL], <1range> is also used to delete ranges that have been saved but are no longer needed.
3.4.1.1

SAVING AN A UTO R ANGE RANGE
OPERATION
To save a range created by AutoRange, the range must be the active range.
Use AutoRange or AutoTest to create the range (sees Sections 3.3.4, 3.3.10)
and then make any desired feature and setting adjustments.
Once the AutoRange range is set up as desired, press [SETUP], <1range>,
<1save>. The display is:
1.
Indication that this is a range to be saved.
2.
Designator and position of the Q-RPT used by
the range to be saved.
3.
Pressure unit of measure of the range to be
saved.
4.
Full scale pressure of the range to be saved in
gauge mode and absolute mode if available.
Page 47
Save range A70M
Hi
psi
4000g/4000a
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
Press [ENT] to save the range or [ESC] to return to the MAIN RUN screen without
saving the range.
Default (<DF>) Q-RPT ranges cannot be saved. They are permanent.
Duplicate AutoRange ranges cannot be saved. A duplicate AutoRange range is
a range that has the same measurement mode and full scale and uses the same QRPT as a range that has already been saved.
3.4.1.2

DELETING A UTO R ANGE RANGES
OPERATION
To delete a single saved AutoRange range, press [SETUP], <1range>, <2delete>.
If there are any saved ranges available to delete, the display is:
1.
Indication that the cursor control keys may be
used to toggle through the saved ranges to
select the one to be deleted.
2.
Designator and position of the Q-RPT used by
the range to be deleted.
3.
Pressure unit of measure of the range to be
deleted.
4.
Full scale pressure of the range to be deleted
in gauge mode and absolute mode if available.
< and > A70M
Hi
psi
4000g/4000a
Use the cursor control keys to toggle through the ranges available to be deleted.
When the desired range to be deleted is displayed, press [ENT]. If you are sure you
want to delete this range, press [ENT] again in response to the <Delete?> query.
[ESC] returns to the <AutoRange:> screen without deleting a range.
To delete all of the saved AutoRange ranges, press [SETUP], <1range>,
<3delete all>. If you are sure you want to delete all the ranges, respond <1yes>
to the <Delete all saved ranges?> query. If not, respond <2no>.
3.4.2
<2RES> (RESOLUTION)
 PURPOSE
To set the resolution with which measured pressures and other pressure indications and
settings are displayed.
 PRINCIPLE
The resolution with which RPM4 displays pressure values can be adjusted. This feature can be
used to reduce the resolution when lower precision measurements are being made and excess
resolution might confuse or distract the operator.
The resolution setting determines the number of digits with which pressure is displayed. The
resolution is calculated based on the span of the range and then rounded to the furthest digit to
the right. For example, resolution of 0.001 % on a range of 1 500 psi is 1 500 X 0.001 % = 0.015
which is rounded down to 0.01 psi.
Default resolution is 10 ppm of active range span. Resolution is set automatically by
AutoRange (see Section 3.3.4) and by AutoTest initialization (see Section 3.3.10).
© 2007 DH Instruments, a Fluke Company
Page 48
3. OPERATION
 OPERATION
To access the resolution function, press [SETUP],
<2res>. The display is:
Display resltn:
Hi
0.0010 %FS
< and >
Use the cursor control keys to set the desired level of resolution. Press [ENT] to return to the
MAIN RUN screen with the new resolution setting active or [ESC] to make no changes.
The resolution setting is range specific. A resolution setting made in one range does NOT
affect other ranges.
The maximum resolution setting is limited in AutoRange ranges that are less than 10% of
the Q-RPT default full scale.
3.4.3
<3STAB>
 PURPOSE
To view and/or adjust the stability test that is the Ready/Not Ready criterion for the active QRPT and range.
See Section 3.2.1 Pressure Ready/Not Ready.
 PRINCIPLE
RPM4 continuously monitors the rate of change of pressure measured by the active Q-RPT
and compares this rate to the active stability limit to make a Ready/Not Ready determination
(see Section 3.2.1). The stability function allows the stability limit to be adjusted by the user
to increase or decrease the stability required for a Ready condition to occur.
Default stability when using AutoRange is + 0.005% FS of active range span. Default
statbility when AutoRanging as part of an AutoTest is 10% of the DUT tolerance (see Section
3.3.4, Table 4).
The stability limit is separate and different from the Rate DISPLAY function (see Section
3.3.6.2) which allows the current rate of change of pressure to be displayed.
 OPERATION
To access the stability setting adjustment, press
[SETUP], <3stab>. The display is:
Stability limit:
0.5 psi/s
Hi
Edit the desired stability limit setting. [ENT] activates the stability limit for the active range
and returns to the main run screen Press [ESC] to return to the MAIN RUN screen with no
change to the stability limit.
The stability setting is range specific. A stability setting made in one range does NOT
affect other ranges.
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
3.4.4
<4UL> (UPPER LIMIT)
 PURPOSE
To set the upper pressure limit value for a pressure range and measurement mode.
 PRINCIPLE
The UPPER LIMIT function provides the user with a settable pressure limit at which an alarm
sounds.
When the limit is reached, RPM4’s beeper sounds intermittently as long as pressure is above
the limit.
The UPPER LIMIT function has two purposes. First, when UL is set to its default value, it serves
as a warning that the maximum pressure of the active range is about to be exceeded.
Second, UL can be set by the user to a value other than the default value to provide an alarm
that a specific pressure limit has been exceeded. This feature is often used to help protect a
system to which RPM4 is connected. For example, it might be set just over the full scale of a
device under test (DUT) that is being calibrated. Note that using AutoRange or AutoTest
automatically sets the UL to just above the AutoRange full scale (see Sections 3.3.4, 3.3.10).
The default upper limit is 105 % of AutoRange span or 102 % of Q-RPT default (maximum)
range when AutoTest is used, whichever is lower.
 OPERATION
To view or edit upper limit of the active range press [SETUP], <4UL>.
The display is:
1.
Entry field for upper limit value in active pressure unit of
measure and measurement mode.
Upper limit:
10200 psi a
Hi
Edit the upper limit value as desired. The maximum upper limit is 105 % of span in an
AutoRange range or 102 % of default Q-RPT full scale, whichever is smaller. Press [ENT] to
return to the MAIN RUN screen with the new upper limit active. Press [ESC] to return to the
MAIN RUN screen with no change to the upper limit.
When the upper limit has been exceeded, the display of current pressure flashes and a beep
sounds for 3 seconds on/2 seconds off intervals. Reduce the pressure applied to RPM4 so
that it is below the upper limit to return to normal operation.
Upper limit values are specific to each range and measurement mode. Be careful not to
assume that the upper limit set in one measurement mode will apply to the other.
For example, if you change the upper limit in gauge mode, the upper limit will not be changed in
absolute mode.
3.4.4.1
OVER PRESSURE FUNCTION
In addition to the UL function, RPM4 has an over pressure function.
The over pressure function executes when a Q-RPT measures a pressure that is
greater than 104 % of the Q-RPT’s default span. This is 3120 psi (215.2 MPa)
for the A20M Q-RPT and 10400 psi (717.2 MPa) for the A70M Q-RPT.
© 2007 DH Instruments, a Fluke Company
Page 50
3. OPERATION
The over pressure function causes the measured pressure display to flash. The
overpressure function also logs the time and date of the overpressure condition in
both user and factory logs to assist in incident diagnosis (see Section 3.5.7.5).
To recover from an overpressure condition, cycle RPM4 power. Before cycling
power, be sure to correct the condition that caused the overpressure.
3.4.5
<5AT EST >
 PURPOSE
To view data collected while running an AutoTest and/or to view and edit File AutoTest
definition files.
See Section 3.3.10, PRINCIPLE for information on the AutoTest function.
 OPERATION
To access the ATest menu select [SETUP], <5ATest>. The display is:
Select <1data> to view AutoTest results data (see
Section 3.4.5.1).
Select <2file> to view or edit an AutoTest definition
file (see Section 3.4.5.2).
3.4.5.1

AutoTest:
1data 2file
DATA
PURPOSE
To view the data files that are created when an AutoTest is run.

PRINCIPLE
RPM4 supports AutoTest automated tests (see Section 3.3.10). When an
AutoTest is run, the RPM4 pressure measurement accepted by the operator at
each point is logged. The logged pressure measurements and an identifying
header are stored in a data file. The data file can be viewed immediately
following the last point of the sequence by selecting <1data>. In addition, the
last ten data files recorded can be viewed anytime by selecting [SETUP],
<5ATest>, <1data>.
Data File Protocol
Up to ten data files are buffered, ten at a time, in RPM4 memory. When a new
AutoTest run is completed, its data file goes to the back of the queue and the
oldest data file is deleted.
Data files are identified by a header whose first line is the full scale of the DUT
and the number of test points in the AutoTest. The second line is the date
(YYYYMMDD) and time (HH:MM:SS) at which the last point of the sequence
was accepted.
Following the data file header, each test point is recorded including the pressure
reading of the RPM4 with head, AutoZ and range status as well as an indication
of whether the reading was out of tolerance and the test point number over the
total number of test points in the Sequence.

OPERATION
To access the AutoTest results data file viewing function press [SETUP],
<5ATest>, <1data>.
The first display is the data file header which can be used to toggle through
data files:
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
1.
Full scale of the AutoTest with pressure unit of
measure and measurement mode.
2.
Number of test points executed/total number
of points in the AutoTest.
3.
Date and time that the last point in the
AutoTest was executed.
6000 psig
6/6
20050922 10:51:01 am
Press [+/-] or [→] to scroll through the headers of the other AutoTest data files
available. RPM4 stores up to ten AutoTest data files in order of execution with a
new data file pushing all the files back and deleting the oldest one. When the
header of the AutoTest data file you would like to view appears, press [ENT] to
view the first point of the identified AutoTest data file.
The display is:
1.
RPM4 reading logged for the test point.
2.
Head, AutoZ and Q-RPT indicator (same as in
the RPM4 main run screen) (see Section
3.1.1).
3.
Indication that this is an AutoTest data file
view screen.
4.
<FA> indicating that the AutoTest was a File
AutoTest or <QA> indicating a Quick
AutoTest. This is preceded by <OT> if the
test point was out of tolerance (definition of
out of tolerance is Set point – RPM4 reading >
DUT tolerance).
5.
Number of this test point over total number of
points in the AutoTest.
0.00 psig
View data
hzHi
FA 1/10
Press [ENT] to move to the next data point. Press [←] or [→] to scroll backward
and forward through the test points. The data file header is between the first
point and the last point.
Press [ESC] to exit the data file. Confirmation is required to exit the data view
function.
Up to ten data files are buffered, ten at a time, in RPM4 memory. When a new
AutoTest run is completed, its data file goes to front of the queue and the oldest
data file is deleted.
3.4.5.2

FILE
PURPOSE
To view and edit File AutoTest definition files.

PRINCIPLE
RPM4 supports AutoTests (see Section 3.3.10,  PRINCIPLE). There are two
types of AutoTests:
•
Quick AutoTests in which the DUT and test parameters are entered “on the
fly” during the initialization of the test.
•
File AutoTests in which the DUT and test parameters are stored in a file and
retrieved when the file is selected to run an AutoTest.
File AutoTest parameters are stored in definition files. [SETUP], <5AutoTest>,
<2file> allows File AutoTest definition files to be viewed and edited. Up to 40
File AutoTest definition files with up to 21 test points in each file can be created.
© 2007 DH Instruments, a Fluke Company
Page 52
3. OPERATION
A File AutoTest definition file defines:
•
The identifying number of the File AutoTest definition file.
•
Pressure measurement mode (gauge or absolute).
•
Pressure unit of measure.
•
DUT full scale in pressure unit of measure and measurement mode.
•
DUT tolerance (% FS).
•
Number of test points or pressure targets to include in the AutoTest.
•
Numerical value of each test point or pressure target.
See Section 3.3.10,  OPERATION for information on running a Quick or File
AutoTest.
See Section 3.4.5.1 for information on viewing the data files that result from
running a Sequence.

OPERATION
See Section 3.3.10, OPERATION, for information on RUNNING a Quick or File
AutoTest.
To access the AutoTest definition viewing and editing functions press [SETUP],
<5ATest>, <2file>. Select <1view> to view an AutoTest definition file. Select
<2edit> to edit an AutoTest definition file.
When <2edit> is selected the display is:
Edit File AutoTest #
1
Enter the number (1 - 40) of the File AutoTest to be edited.
To create a File AutoTest definition file similar to an existing definition file
without entering all the definition information, edit an existing definition file and at
the end of the editing process, save it as a different file number.
Measurement mode:
1absolute 2gauge
The display is:
The cursor is on the current selection. Select the desired pressure measurement
mode for the AutoTest (see Section 3.3.3).
1psi 2MPa 3kPa
4bar
The display is:
The unit of measure selection screen is the current [UNIT] selection screen (see
Section 3.3.2). Select the desired pressure measurement unit for the AutoTest.
DUT full scale:
6000 psi g
File1
The display is:
Enter the full scale pressure of the DUT to be calibrated with this File AutoTest.
The value entered will be used along with the DUT tolerance to AutoRange
RPM4 settings when the File AutoTest is run (see Section 3.3.10,
 PRINCIPLE).
DUT tolerance:
0.25% FS
File1
The display is:
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
Enter the tolerance in % of full scale (measurement uncertainty, precision or
accuracy as desired) of the DUT to be calibrated using this File AutoTest. The
value entered will be used along with the DUT full scale to determine RPM4
AutoRange settings when the AutoTest is run (see Section 3.3.10,
 PRINCIPLE).
The display is:
Number of targets:
1
File1
Enter the total number of pressure points or target pressures to be included in
the AutoTest. The maximum number of points is 21. If data is to be taken at
“zero” pressure, include the “zero” points in the point count.
Pressure target N:
0.00 psi g
File1
The display is:
Enter the numerical value of the target pressure point <N>. Repeat until all of the
points in the File AutoTest have been defined.
After entering the last pressure target, the
display is:
Save as File
AutoTest #:1
Enter the identifying number under which this File AutoTest definition file should
be saved. A confirmation is required to overwrite and existing sequence.
While editing a File AutoTest, pressing [ESC] backs through entries until editing
of the pressure target values has begun. Then [ESC] can only be used to
abandon editing.
3.5

[SPECIAL]
PURPOSE
[SPECIAL] accesses a menu of RPM4 functions and features that are less commonly used or not
normally used in regular operation.

OPERATION
1AutoZ 2remote 3head
Press [SPECIAL] from the MAIN RUN screen to access the
SPECIAL menu. The display is:
4SDS 5prefs 6Punit
7intern 8cal 9reset
Some screens, such as the SPECIAL menu, go beyond the two lines provided by the display. This is indicated
by a flashing arrow in the second line of the display. Press the cursor control keys to move the cursor to access the
lines that are not visible or directly enter the number of the hidden menu choice if you know it.
SPECIAL menu choices include:
<1AutoZ>
<2remote>
<3head>
<4SDS>
<5prefs>
<6Punit>
Manage the AutoZero function for the active Q-RPT (see Section 3.5.1).
View and edit COM port (RS-232) and IEEE-488 interface settings. Select remote syntax
style (see Section 3.5.2).
Set HEAD function fluid and height unit of measure (see Section 3.5.3).
Feature not used in this RPM4 model.
View and set screen saver time, keypad sound frequency, unit ID number, time/date,
security protection level (see Section 3.5.5).
Customize the [UNIT] key pressure unit of measure selections (See section 3.5.6).
© 2007 DH Instruments, a Fluke Company
Page 54
3. OPERATION
<7intern>
<8cal>
<9reset>
Access internal functions including on-board barometer viewing, read rate adjustment, incident
log viewing (see Section 3.5.7).
View and adjust RPM4 Q-RPT and barometer calibration coefficients (see Sections 3.5.8, 5.2, 5.3).
Access RPM4’s various reset functions (see Section 3.5.9).
3.5.1
<1A UTO Z>
 PURPOSE
To turn ON and OFF the AutoZ function that offsets the RPM4 Q-RPT readings relative to a
reference value in order to compensate for possible Q-RPT zero drift between full
recalibrations. To view and adjust the value of the AutoZ offset.
To RUN the AutoZ routine that rezeroes the Q-RPT, use [AutoZ] (see Section 3.3.9).
 PRINCIPLE
AutoZ Purpose and Principle
The main component of the change over time of the RPM4 Q-RPTs is change in zero or
offset, independent of span. Offsetting or “rezeroing” RPM4 Q-RPTs relative to a reference
between recalibrations allows measurement uncertainty specifications to be maintained with
less frequent full calibrations. The RPM4 AutoZero function (AutoZ) provides full on-board
support for the rezeroing process to simplify its regular application by the user.
The AutoZero function uses three values:
1. Pstd,0: The pressure value indicated by the AutoZ reference, the device that is acting as the
reference relative to which to offset the RPM4 Q-RPT.
In absolute measurement mode, the pressure at which AutoZ is performed is normally
atmospheric pressure and the Pstd,0 value can be supplied a) by manual entry, b)
automatically from a DHI RPMx connected to RPM4’s COM2 communications port, or c)
automatically from the Lo Q-RPT for the Hi Q-RPT.
In gauge measurement mode, Pstd,0 is always zero (atmospheric pressure) which is
supplied by definition when the Q-RPT is vented to atmosphere.
2. Pu,0:
The pressure reading of the Q-RPT, with no AutoZ offset, at the time AutoZ is
performed.
3. Poffset,G and Poffset,A: The difference between the reading of the Q-RPT with no AutoZ offset
(Pu,0) and the AutoZ standard (Pstd,0) for gauge (G) and absolute(A) measurement mode:
Poffset = Pu,0 - Pstd,0
Poffset represents the difference between the Q-RPT reading (Pu,0) and the AutoZ standard
(Pstd,0). The AutoZ function manages the determination, storage and application of Poffset to
correct the zero offset in absolute and gauge measurement modes.
When the Q-RPT is calibrated, Poffset is set to zero. Poffset is then redetermined at regular
intervals using the AutoZ function. The most recent value of Poffset is applied to the Q-RPT
reading to correct for zero drift.
The AutoZ function can be turned ON and OFF. Table 5 summarizes the effect of AutoZ ON
and OFF in absolute and gauge measurement modes.
AutoZ in absolute measurement mode
The RPM4 A70M/A20M-AF Q-RPTs are intrinsically absolute. They have an evacuated and
sealed reference and naturally measure absolute pressure (difference from vacuum).
In absolute measurement mode, the source of Pstd,0 must be an absolute pressure, nominally
atmospheric pressure, with uncertainty significantly better than that of the Q-RPT that is
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
being AutoZeroed. Given the high pressure range of the RPM4 Q-RPTs, adequate
uncertainty is easily available from a variety of digital barometers or, for the Hi Q-RPT, by the
Lo Q-RPT.
In absolute measurement mode, with AutoZ ON, absolute pressure is calculated as:
Pabs = Pu - Poffset,A
In absolute measurement mode, running the AutoZ function to update the AutoZ value
(Poffset,A), is initiated by the operator using [AutoZ] (see Section 3.3.9.1).
AutoZ in gauge measurement mode, dynamic compensation for atmospheric pressure
The RPM4 A70M/A20M-AF Q-RPTs are intrinsically absolute but they are also used in gauge
measurement mode (difference from atmosphere). Gauge measurement mode is achieved
by subtracting the value of atmospheric pressure from the Q-RPT’s absolute reading using
AutoZ and by dynamically compensating for changes in atmospheric pressure between
opportunities for AutoZ to execute (see Section 3.2.2,  PRINCIPLE).
In gauge measurement mode, the value of Pstd,0 is always zero gauge pressure. Zero gauge
pressure, by definition, is applied to the Q-RPT when it is vented to atmosphere. Gauge
pressure is the measured absolute pressure, Pu, minus Poffset,G.
Pgauge = Pu - Poffset,G
When AutoZ is ON, dynamic compensation for atmospheric pressure is also applied to
compensate for changes in atmospheric pressure as measured by RPM4’s on-board barometer
(ΔPatm) between AutoZ updates (see Section 3.2.2). The measured gauge pressure is
calculated using ΔPatm to correct the value of Poffset.G.
Pgauge = Pu - Poffset.G - ΔPatm
In gauge measurement mode, running AutoZ is initiated by the operator pressing [AutoZ]
(see Section 3.3.9.1) when the RPM4 is vented. This assures regular updating of the value
of Poffset,G and Patm,0. ΔPatm is continuously updated automatically.
When gauge mode is first activated, the value of Poffset.G subtracted from the absolute
pressure reading to achieve gauge pressure is standard atmosphere of 101.325 kPa. This can
cause a large zero error when gauge mode is activated if atmospheric pressure is significantly
different from standard atmospheric pressure. When gauge mode is activated, always vent the
RPM4 Q-RPT and press [AutoZ] to run AutoZ and obtain an actual value of Poffset.G .
AutoZ ON/OFF
The AutoZ function can be turned ON and OFF separately for gauge and absolute
measurement modes. Table 5 summarizes the effect of AutoZ ON and OFF. Generally,
AutoZ should always be left ON.
Table 5. AutoZ ON and OFF
MEASUREMENT
MODE
Absolute
AutoZ
STATUS
Poffset
APPLIED
ON
YES
OFF
NO
ON
Not Applicable
YES
OFF
NO
Page 56
AutoZ
ROUTINE
RUNS
When initiated
by operator
Not available
YES
Gauge
© 2007 DH Instruments, a Fluke Company
ΔPatm
APPLIED
When initiated
by operator
3. OPERATION
Recommendations for the Use of the AutoZ Function
The AutoZ function provides a powerful and easy to use tool for improving the stability over
time of RPM4 Q-RPTs and maximizing the recalibration interval by compensating for zero
drift between full recalibrations. The following simple recommendations will help assure that
you use this feature to best advantage.
•
In gauge mode: Always leave AutoZ ON. Use [AutoZ] to run AutoZ whenever RPM4 is
vented and displays a significantly non-zero value. Wait at least 2 minutes after venting before
running AutoZ.
•
In absolute measurement mode: Always leave AutoZ ON. Use [AutoZ] to run AutoZ every
approximately every 30 days or when RPM4 has been exposed to a temperature change
exceeding 15 ºC (36 ºF). AutoZero the Lo Q-RPT against a barometer with measurement
uncertainty of ± 0.04 psi (275 Pa) or better (note that this is only 0.3% of atmospheric pressure
so a relatively low accuracy barometer is adequate). AutoZero the Hi Q-RPT against the Lo QRPT. Wait 5 to 10 minutes before running AutoZero in absolute mode.
 OPERATION
The AutoZ function and values are Q-RPT AND measurement mode (gauge or absolute)
specific.
To RUN the AutoZ routine that rezeroes the Q-RPT, use [AutoZ] (see Section 3.3.9).
To access the RPM4 AutoZ function press [SPECIAL], <1AutoZ>. The display is:
1.
Active Q-RPT designator.
2.
Indication of active measurement mode (<abs> for absolute,
<gage> for gauge).
3.
Indication of whether AutoZ is currently ON or OFF for this
Q-RPT and measurement mode.
1off 2view
3edit
Hi
abs ON
Select <1off> (or <1on>) to change the AutoZ status for the current Q-RPT and
measurement mode from ON to OFF or vice versa.
AutoZ ON is indicated by a <z> in the MAIN RUN screen, top line, third character from the
right. When AutoZ is OFF, the character is blank.
Select <2view> to view the current value of Poffset for the active Q-RPT and measurement mode.
Poffset should be zero in absolute measurement mode when the RPM4 is new or has just been
calibrated. Poffset should be roughly equal to atmospheric pressure when the Q-RPT is in gauge
measurement mode.
Select <3edit> to edit the value of Poffset for the active Q-RPT and measurement mode
(see Section 3.5.1.1).
The value of Poffset is always displayed and entered in Pascal (Pa).
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
3.5.1.1
EDIT AUTOZ
The edit AutoZ function should be used only with great care as entering
inappropriate values may result in out of tolerance measurements. In normal
operation, the value of the AutoZ offset, Poffset, should be changed by running AutoZ
using [AutoZ] (seen Section 3.3.9). Before editing Poffset, see Section 3.5.1, 
PRINCIPLE.
To edit the current Poffset value for the active Q-RPT and measurement mode,
press [SPECIAL], <1AutoZ>, <3edit>. The display is:
1.
Indication of active measurement mode
(<abs> for absolute, <gage> for gauge).
2.
Active Q-RPT for which Poffset is being viewed.
3.
Edit field for value of Poffset.
Poffset, Abs
275 Pa
Hi
Edit Poffset as desired and press [ENT] to activate the new value. Press [ESC] to
abandon changes.
The value of Poffset is always displayed and entered in Pascal (Pa).
3.5.2
<2REMOTE>
 PURPOSE
To configure the RPM4 COM1, COM2 and IEEE-488 (GPIB) communication ports. To test COM1
and COM2 communications. To select the remote programming communications format.
 PRINCIPLE
The RPM4 has two RS-232 communications ports referred to as COM1 and COM2 and a
single IEEE-488 (GPIB) port. COM1 or the IEEE-488 port is for communicating with a host
computer (see Section 4), and COM2 is reserved for communicating with an external device
(e.g. an RPMx, a multimeter, etc.). These ports’ settings can be viewed and changed using
[SPECIAL], <2remote>.
RPM4 has two remote communications formats, classic and enhanced (see Section 4.3). The
active format can be selected.
A self test is supplied for RS-232 communications. The self test allows verification that the
RPM4 RS232 ports (COM1 and COM2) are operating properly and that a valid interface
cable is being used.
 OPERATION
To access the communications settings, press [SPECIAL], <2Remote>.
•
Select <1COM1> to view and edit COM1 settings (see Section 3.5.2.1.).
•
Select <2COM2> to view and edit COM2 settings (see Section 3.5.2.1.).
•
Select <3IEEE> to view and edit IEEE-488 settings (see Section 3.5.2.2).
•
Select <4format> to select the remote communications command format (see Section 3.5.2.3).
•
Select <5RS232test> to run the COM1 and COM2 communications test (see Section 3.5.2.4).
© 2007 DH Instruments, a Fluke Company
Page 58
3. OPERATION
3.5.2.1
<1COM1, 2COM2>
The COMx ports can be set for specific communications settings. The settings
are baud rate, parity, data bits and stop bits. The available options are:
Baud
300, 600, 1 200, 2 400, 4 800, 9 600, 19 200, 28 800, 38 400
Parity
NONE, ODD or EVEN
Length
7 or 8
Stop Bit
1 or 2
The default is <2 400, E, 7,1> for both COM1 and COM2.
The user can also specify one or two termination characters, referred to as
“Term1” and “Term2”, as well as define these characters. These define the
characters that mark the end of commands that are sent to the RPM4 as well as
mark the end of replies sent back to the host computer. The RPM4 typically uses
the <Term1> character to mark the end, and will ignore the <Term2> character.
The characters can be any decimal number from 1 to 255. The defaults are
<13> (carriage return) and <10> (line feed) and usually should not be changed.
3.5.2.2
<3IEEE-488>
The IEEE-488 port’s primary address can be set from 1 to 31 in this screen.
The factory default value is 10. Secondary addressing is not used or supported.
This address must not conflict with the address of any other device on the same
IEEE-488 bus.
The receiving terminating character must be a line feed and EOI. Carriage returns
are ignored if received. The RPM4 sends a line feed and asserts the EOI line to
terminate a reply. These settings are fixed to agree with IEEE Std. 488.2. If you
change the address, the IEEE interface will reset (PON) and become idle.
3.5.2.3
<4FORMAT>
The RPM4 has two different syntax formats available for the remote program
commands.
The classic remote command format is highly intuitive and conforms with previous DHI
PPC and RPM products.
The enhanced remote command format generally uses the same commands as the
classic format, but in addition it follows the syntax, format, and status reporting
features of IEEE Std 488.2.
The details of each format are covered in Section 4.3.
[SPECIAL], <2remote>, <4format> allows the remote program command syntax to
be selected. The cursor is on the active format. Select <1classic> or <2enhanced>
as desired.
3.5.2.4
<5RS232 SELF-TEST>
The RS232 self-test is provided to check the RPM4 COM ports and the interface
cable independently of an external device or computer.
If you are having difficulty communicating with RPM4 from a host computer
using RS232, the RS232 self test can help establish that the RPM4 COM1 port
you are trying to communicate with and the interface cable you are using are good.
To run a self test of the RS232 ports (COM1 and COM2), press [SPECIAL],
<2remote>, <5RS232test>.
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
The display prompts you to connect COM1 to COM2 using a standard pin-to-pin
DB-9F to DB-9M RS232 cable (see Section 4.2.1.1, 4.2.1.3).
Once the cable has been installed, press [ENT] to run the self-test. The test is first
executed in the COM1→COM2 direction and then in the COM2→COM1 direction.
If the COM1→COM2 test passes:
<PASSED> displays briefly and the test
proceeds to COM2→COM1.
If COM2→COM1 passes:
<PASSED> is displayed briefly followed by the
conclusion, <The RS232 test has PASSED>.
If a test fails:
Execution is suspended until [ENT] is pressed.
The RPM4 RS232 test can fail for three reasons:
1.
The RS232 cable being used is incorrect (Section 4.2.1.1, 4.2.1.3 for information
on the correct cable).
2.
COM1 and COM2 do NOT have the same serial communications settings and
therefore cannot communicate together (see Section 3.5.2.1 to set the
COM ports).
3. COM1 or COM2 is defective.
The reason for failed communications is almost always a cable or incorrect RS232
interface settings. Be sure that these are correct before concluding that a COM port
is defective.
3.5.3
<3HEAD>
 PURPOSE
To view or change the properties of the HEAD function (see Section 3.3.7) including the unit of
measure of length for head height entry and the test fluid type and species for density calculations.
 OPERATION
From the MAIN RUN screen, press [SPECIAL], <3Head>.
Select the desired height unit of measure and press [ENT].
Select <1gas> or <2liqud> depending on the pressurized medium between the RPM4 and
the height at which pressure is to be calculated. Select the gas or liquid species. The liquid
selection <3User>, is to create a custom liquid with a user entered density.
Use [HEAD] to set a head height if desired.
3.5.4
<4SDS>
 PURPOSE
This feature is not used in RPM4 A70M/A20M-AF.
3.5.5
<5PREFS>
 PURPOSE
To access a menu of RPM4 operational preferences and functions.
 OPERATION
© 2007 DH Instruments, a Fluke Company
Page 60
3. OPERATION
To access the PREFS menu press [SPECIAL],
<5prefs>. The display is:
1ScrSvr 2sound 3time
4ID 5level
The PREFS menu includes:
<1ScrSvr>
View and change the screen saver activation time (see Section 3.5.5.1).
<2sound>
View and change the key press sounds (see Section 3.5.5.2).
<3time>
View and edit the internal time and date settings (see Section 3.5.5.3).
<4ID>
View the RPM4 serial number (SN) and view or edit the ID number
(see Section 3.5.5.4).
<4level>
View and set the user security level and/or password (see Section 3.5.5.5).
3.5.5.1

<1S CR S VR >
PURPOSE
To adjust the idle time after which RPM4’s SCREEN SAVER activates.

PRINCIPLE
RPM4 has a SCREEN SAVER function which causes the display to dim after a
front panel key is NOT pressed for a certain amount of time. The default is for the
screen saver to activate after 10 idle minutes. The screen saver activation time
can be adjusted by the user or screen saving can be completely eliminated.
Setting screen saver time to zero eliminates the SCREEN SAVER function so
that the display permanently remains at full brightness.

OPERATION
To access the SCREEN SAVER function, press [SPECIAL], <5prefs>,
<1ScrSav>. Edit, in minutes, the idle time after which screen saver will activate
to dim the screen. Set the time to zero to eliminate the SCREEN SAVER function.
3.5.5.2

<2SOUND>
PURPOSE
To adjust or suppress the RPM4 valid key press sound.
See Section 3.1.4 for information on the complete list of sounds made by
RPM4 and their meanings.

PRINCIPLE
RPM4 provides audible feedback by a brief “beep” when a valid key press is
made. The tone frequency of this beep may be selected from three choices or it
may be completely suppressed. Invalid key presses are indicated by a
descending two tone “blurp” which cannot be suppressed.

OPERATION
To access the keypad sound adjustment function press [SPECIAL], <5prefs>, <2sound>.
Select between <2lo>, <3mid> or <4hi> to adjust the valid key press tone frequency.
Select <1none> to suppress the valid key press tone.
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
The sound function only affects the valid key press tone. The invalid key press
tone and other RPM4 sounds cannot be adjusted or suppressed.
3.5.5.3

<3TIME>
PURPOSE
To view and edit the RPM4 internal time and date settings.

OPERATION
To
access
the
TIME
function
press [SPECIAL], <5prefs>, <3time>.
The display is:
Edit: 1time 2date
08:32:11 am 20030125
Select <1time> to edit the time. Edit hours, then minutes, then am/pm by
pressing [ENT] after each entry. Seconds go to zero when minutes are entered.
This can be used to synchronize the time with a time standard.
Select <2date> to edit the date. The date must be specified in YYYYMMDD format.
The RPM4 date and time are set to United States Mountain Standard Time in
the final test and inspection process at the factory. If desired, use the TIME and
DATE function to set your local time and date.
3.5.5.4

<4ID>
PURPOSE
To view or edit the RPM4 user ID and to view the RPM4 serial number.

OPERATION
To access the ID function press [SPECIAL], <5prefs>, <2ID>.
Select <1view> to view the current ID.
Select <2edit> to edit the ID.
The ID has twelve characters. When the edit screen is opened, the cursor is on
the first character. Numerical values can be entered directly from the keypad. In
addition, the cursor control keys can be used to toggle through a list of available
alphanumeric characters. Holding the key slews through the characters.
Character order going up is: blank space, symbols, lower case letters, upper
case letters, numbers. After selecting a character, press [ENT] to activate it and
move to the next character field.
When a character is selected the cursor moves to the next character. To leave a
blank character, press [ENT] with the field for that character blank. Use this for
the trailing characters if the ID being entered is less than twelve characters.
After the last of the twelve characters has been entered, the <Save ID?> option is offered.
Select <1no> to return to the ID edit screen. Select <2yes> to save the edited ID.
The ID can be set remotely from a computer which is quite a bit more
convenient than entering characters from the keyboard (see Section 4.4.4, “ID”
command).
The ID is not cleared or reset by any RESET function
(see Section 3.5.9).
© 2007 DH Instruments, a Fluke Company
Page 62
3. OPERATION
3.5.5.5

<5LEVEL> (SECURITY)
PURPOSE
To set user protection levels to restrict access to certain functions and to edit the
password required for changing user levels.

PRINCIPLE
RPM4’s front panel user interface provides the means to access all RPM4 user
defined data, settings and functions including calibration data. Inadvertent,
uninformed or unauthorized altering or deleting of data, settings and functions
could require extensive reconfiguration by the user and might cause invalid
readings and behavior. For these reasons, depending upon the application in
which RPM4 is being used, it may be desirable to restrict access to some
functions. The user level function provides a means of restricting access to certain
functions. Four different levels of security are available.
Access to changing security levels can be left open, or be protected by a password.
Security Levels
The security levels are structured to support typical operating environments as follows:
None
This level is intended for use only by the system manager and/or
calibration facility. It allows access and editing in all areas including
critical metrological information.
Low
Low security is designed to protect the specific metrological
information and SYSTEM DIAGNOSTIC AND MAINTENANCE
functions of the system against accidental alteration. It is intended for
an advanced operator performing many different tasks. Low security
is the default user level setting.
Medium
Medium security is designed to protect specific metrological
information in the system and to assure that the RPM4 is operated
using consistent operational parameters.
High
High security is designed to protect all operating parameters. It is
intended to minimize operator choices, for example to perform
repeated identical calibrations under consistent conditions.
RPM4 is delivered with the security level set at low to avoid inadvertent altering
of critical internal settings but with access to changing security levels unrestricted.
It is recommended that the low security level be maintained at all times. If there is a
risk of unauthorized changing of the security level, changing authority should be
password protected (see  OPERATION of this section).
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
The security levels are structured to support typical levels of operation as shown
in Table 6. Specifically, the security levels prevent execution of the functions
accessed by the key strokes marked by “•”:
Table 6. Security levels
FUNCTION
LOW
MEDIUM
[RANGE]
[ENT] (AutoTest)
[UNIT]
[MODE]
•
[AutoRange]
[LEAK CK]
•
[DISPLAY]
[HEAD]
HIGH
•
•
•
•
•
•
•
•
[SDS] (NOT USED IN THIS RPM4 MODEL)
•
[AutoZ] (in absolute mode)
[SETUP]
•
•
•
•
[SETUP], <1range>
[SETUP], <2res>
[SETUP], <4UL>
[SETUP], <5ATest>
[SPECIAL]
[SPECIAL], <1AutoZ>
[SPECIAL], <1AutoZ>, <1on/1off>
[SPECIAL], <1AutoZ>, <3edit>
•
•
•
•
•
[SPECIAL], <2remote>
[SPECIAL], <2remote>, make changes
[SPECIAL], <3head>
[SPECIAL], <4SDS> (NOT USED IN THIS RPM4 MODEL)
[SPECIAL], <5pref>, <1ScrSvr>
[SPECIAL], <5pref>, <2sound>
[SPECIAL], <5pref>, <3time>
[SPECIAL], <5pref>, <3time>, make changes
SPECIAL], <5pref>, <4ID>, <2edit>
•
•
[SPECIAL], <6Punit>
[SPECIAL], <7internal>
[SPECIAL], <7internal>, <3RPT2x> (NOT USED))
[SPECIAL], <7interrnal>, <5log>, clear log
•
•
[SPECIAL], <8cal>
[SPECIAL], <8cal>, <2edit> under any selection
•
[SPECIAL], <4reset>
[SPECIAL], <4reset>, <4cal>
[SPECIAL], <4reset>, <5all>
•
•
Remote communications disabled
“•” indicates the function/menu is NOT accessible.
© 2007 DH Instruments, a Fluke Company
Page 64
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
3. OPERATION

OPERATION
RPM4 is delivered with no active password and access to the User Level menu is
open. The user level is set to <1Low>. User levels can be changed freely until a
password has been created.
To
access
the
LEVEL
function
press [SPECIAL], <5prefs>, <5level>.
The display is:
1change user level
2edit password
Selecting <1change user level> brings
up the restriction menu:
Restrictions: 1none
2low 3medium 4high
The cursor is on the current restriction level.
or [ESC] back to the MAIN RUN screen.
If no password is active, selecting
<2edit password> displays the user
password and allows it to be edited.
Select a different level or
Password: pppppp
0 disables password
Once a password has been entered, the user level cannot be changed without
reentering the password.
Passwords can be up to six numbers in length and cannot start with a zero.
If <0> is entered, the password is made inactive and the user will not be required
to enter a password to access the user level menu. This condition, with a
security level of <2low>, is the factory default.
If there is an active password, the
RPM4 password entry screen appears.
The user must enter the user defined
password or the factory secondary
password to proceed further:
RPM4 SNnnnn-xx
Password: pppppp
The first field, <nnnn>, is the serial number of the RPM4, followed by a second field,
<xx>, that represents the number of times that a secondary password has been
used. The second field, <xx>, increments each time a secondary password is
used. The third field, <pppppp> is for user entry of the normal password.
The factory secondary password is available in case the user’s password has
been misplaced or forgotten. It can be obtained by contacting a DHI Authorized
Service Center (see Table 23). The factory secondary password is different for all
RPM4’s and changes each time it is used.
3.5.6
<6PUNIT>
 PURPOSE
To customize the selection of pressure units of measure that are available in the [UNIT] key menu.
 PRINCIPLE
The [UNIT] function key makes available a choice of four default pressure units (psi, MPa,
kPa, bar) (see Section 3.3.2). RPM4 also supports many commonly used units other than those
included in the default set up. These units can be made available for active selection by
customizing the UNIT function using [SPECIAL], <6PresU>. This allows RPM4 to offer a
very wide selection of units while simplifying day to day operation. The typical user
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
customizes the [UNIT] function key to support his/her most commonly used units. Up to six
units can be included in the [UNIT] screen.
 OPERATION
To customize the [UNIT] function key, press [SPECIAL], <6PresU> from the MAIN RUN
screen. The display is:
1.
Entry field to specify which unit position (1 to 6) of the [UNIT]
function key menu is to be changed.
Set up unit #6
Unit#6 1SI 2other
3altitude 4user
Enter the number of the unit position that you would
like to change. The display becomes:
Select the desired pressure unit category (SI units include units based on SI units such as
mmHg), then select the desired unit from the unit menu. Note: <3altitude> is not available in
this RPM4 model.
The units of measure available are listed in Table 7.
Table 7. UNIT function - available units of measure
<1SI>
<2OTHER>
<3ALTITUDE
>
<1Pa>
<2hPa>
<3kPa>
<4MPa>
<5mbar>
<6bar>
<7mmHg>
<8mmWa>
<1psi>
<2psf>
<3inHg>
<4inWa>
<5kcm2>
Not available
in this RPM4
model
<4USER>
If <4user> is selected, the user unit must be defined. The display is:
1.
Define user unit:
1.000000 unit/Pa
Entry field.
Enter the number of user units per Pascal (Pa) in the entry field. Pressing [ENT] defines the
user unit and returns to the <Set up unit #n> screen.
The user defined unit label can be customized to any alphanumeric, four character label
using the remote command “UDU” (see Section 4.4.4).
See Section 7.1.1 for the pressure unit conversion factors used by RPM4.
3.5.7
<7INTERNAL>
 PURPOSE
To view, set, adjust, and maintain various aspects of RPM4’s internal operation.
 OPERATION
To access the internal selections press [SPECIAL],
<7internal>. The display is:
© 2007 DH Instruments, a Fluke Company
Page 66
1baro 2ReadRt 3RPT2x
4lo vnt 5log
3. OPERATION
The INTERNAL menu choices include:
<1baro>
View the real time output of the RPM4 on-board barometer (see Section
3.5.7.1).
<2ReadRt>
Turn ON and OFF RPM4’s automated, rate of change dependent, reading
and integration and display rate feature (see Section 3.5.7.2).
<3RPT2x>
Feature not used in this RPM4 model.
<4lo vnt>
Feature not used in this RPM4 model.
<5log>
View the RPM4 incident log (see Section 3.5.7.5).
3.5.7.1

<1BARO>
PURPOSE
To view the value of atmospheric pressure as measured by the RPM4 on-board
barometer.

PRINCIPLE
RPM4 A70M/A20M-AF is equipped with an on-board barometer. The atmospheric
pressure measurements made by the on-board barometer are used for dynamic
compensation of atmospheric pressure when making gauge pressure measurements
(see Sections 3.2.2, 3.3.3,  PRINCIPLE).
See Section 5.4,4 Figure 13 and Section 5.4.5, Figure 14 for a photo and
schematics showing the position of the on-board barometer in RPM4.
The on-board barometer is a low accuracy sensor used only for measuring
small changes in atmospheric pressure over short periods of time
(see Section 3.2.2). RPM4 measurement uncertainty does not depend on the
measurement uncertainty of the on-board barometer.

OPERATION
To view the current reading of the on-board barometer press [SPECIAL],
<7internal>, <1baro>. The display is in the active pressure unit of measure
(see Section 3.3.2). The display resolution is fixed to 0.1 Pa, or its equivalent.
3.5.7.2

<2R EAD R T >
PURPOSE
To turn ON and OFF RPM4’s automated, rate of change dependent, reading
integration and display rate feature.

PRINCIPLE
To obtain maximum resolution from RPM4 Q-RPT pressure measurements, an
integration time of about 1.2 second per reading is used. In most situations,
maximum precision is needed when pressures are stable so a relatively slow
display update rate presents no disadvantage. However, when pressure is
changing quickly, more rapid pressure updates are usually more important than
obtaining maximum precision on individual readings. The RPM4 read rate
function automatically adjusts pressure measurement integration time depending
on the rate of change of pressure. When pressure is changing rapidly, reading
rate is increased. When pressure is evolving slowly, reading rate is decreased
and maximum precision is obtained.
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
When the automated read rate function is ON, three pressure rate of change
dependent read rates are used. The result is three display update rates:
Table 8. READRT - display update rates
PRESSURE
RATE OF CHANGE
DISPLAY
UPDATE
> 3 % of range span/s
≈ 0.2 s
> 0.5 and < 3 % of range span/s
≈ 0.6 s
< 0.5 % of range span/s
≈ 1.2 s
For situations in which maximum reading precision is desired regardless of pressure
rate of change, the RPM4 automated read rate function can be turned OFF.
In this case, the reading rate is always the high resolution rate of about 1.2 readings
per second.

OPERATION
To turn the automated read rate function ON or OFF or check its current status,
press [SPECIAL], <7internal>, <3ReadRt>.
Auto read rate:
1on 2off
The display is:
H3
The cursor is on the current selection.
Selecting <1on> activates the automated reading rate and returns to the MAIN
RUN screen. Selecting <2off> turns OFF the automated reading rate and
returns to the MAIN RUN screen.
The default RPM4 condition is auto read rate ON.
Auto read rate ON/OFF is NOT Q-RPT or range specific. Turning auto read rate
ON or OFF in one range turns it ON or OFF for all RPM4 ranges.
3.5.7.3

<3RPT2 X >
PURPOSE
This feature is not used in this RPM4 model.
3.5.7.4

<4LO VNT>
PURPOSE
This feature is not used in this RPM4 model.
3.5.7.5

<5LOG>
PURPOSE
To view and/or clear the RPM4 event log.

PRINCIPLE
RPM4 records to a log each time one of the following events occurs:
•
Pmax! of an internal RPM4 Q-RPT is exceeded (see Section 3.4.4.1).
•
A memory fault occurs.
© 2007 DH Instruments, a Fluke Company
Page 68
3. OPERATION

OPERATION
To view the event log press [SPECIAL], <7internal>, <5log>. The oldest logged
event appears. Pressing [ENT] steps through the logged events from the oldest
to the most recent and ending with the option to clear the log, <1no>, <2yes>.
The log clear choice is not available in all security levels (see Section 3.5.5.5, Table 6).
When all events have been viewed, <End of log> displays.
3.5.8
<8CAL>
 PURPOSE
To calibrate the RPM4 Hi and Lo Q-RPTs and adjust the on-board barometer. These
functions are considered part of RPM4 maintenance and are covered in the maintenance
section of this manual (see Sections 5.2, 5.3).
3.5.9
<9RESET>
 PURPOSE
To reset various RPM4 settings to default or factory values.
 PRINCIPLE
RPM4 stores its user definable settings in non-volatile memory. The reset menu allows the
user to selectively or completely reset these settings to factory defaults. This clears any
settings that the user has made, and should be used only to restore the RPM4 to a known
state. RPM4 goes through its power up sequence after any type of reset is executed.
RPM4 reset functions will change current settings to factory defaults. These may include
settings vital to RPM4 operation and affecting the calibration of the quartz reference pressure
transducers (Q-RPTs). Reset functions should only be used by qualified personnel with knowledge of
reset consequences. Reset functions should never be used “experimentally”.
 OPERATION
To access the RESET menu, press [SPECIAL],
<9reset>. The display is:
1sets 2units 3ATest
4cal 5all
RESET menu choices include:
<1set>
to reset general system operating parameters (see Section 3.5.9.1).
<2units>
to reset unit of measure functions (see Section 3.5.9.2).
<3ATest> to reset AutoTest parameters, clear File AutoTest files and clear the AutoTest data
log (see Section 3.5.9.3).
<4cal>
to reset internal calibration coefficients and modes (see Section 3.5.9.4).
<5all>
to reset all settings except ID and security password to factory default values
(see Section 3.5.9.5).
3.5.9.1

<1SETS>
PURPOSE
Sets most general operating parameters back to default values. Does not affect
calibration coefficients, remote interfaces or AutoRange ranges. The Reset – Sets
resets are itemized in Table 9.
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© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
Table 9. Reset – Sets
RESET
RESULT
SEE SECTION
[UNIT]
Pressure unit of measure to first of the six available (psi)
3.3.2
[MODE]
Measurement mode to the native mode of the Q-RPT (absolute)
3.3.3
[RANGE]
Hi Q-RPT default range (10000 psi)
3.3.1
[HEAD]
0 cm height and Nitrogen medium
3.3.7
Stability Limit
0.005 % of Hi Q-RPT default range
3.4.3
Upper Limit
Hi Q-RPT default range default value
3.4.4
Resolution
0.001 % FS of Hi Q-RPT default range
3.4.2
AutoZ
AutoZ ON for both Q-RPTs and gauge and asbsolute
measurement modes. Zoffset value not affected
3.5.1
AutoZ
Patm,0 set to 101.325 kPa a
Leak Check
15 second run time. Clear logged results
Screen Saver
10 minutes to activation
3.5.5.1
Key Sounds
Medium tone valid key press sound
3.5.5.2
Lo Vnt
Automatic
3.5.7.4
ReadRate
Automatic
3.5.7.2
3.5.9.2

3.5.1, 3.2.2
3.3.5
<2 UNITS>
PURPOSE
Sets the pressure units available under the UNIT function to default selections
depending (see Section 3.3.2).
Sets the user defined unit to 1.000/Pa (see Section 3.5.6).
Sets the reference temperature for inWa unit to 20°C.
3.5.9.3

<3AT EST >
PURPOSE
•
Resets Auto Tests to default characteristics (see Section 3.3.10).
•
Clears File AutoTest definition files (see Section 3.4.5.2).
•
Clears AutoTest results data logs (see Section 3.4.5.1).
© 2007 DH Instruments, a Fluke Company
Page 70
3. OPERATION
3.5.9.4

<4 CAL>
PURPOSE
The Reset - Cal function will reset the Q-RPT and barometer calibration
coefficients and reset AutoZ values to zero. This will change the RPM4 calibration
and could cause it to make out of tolerance measurements.
Clears all user values affecting the calibration of Q-RPTs and the on-board
barometer. The Reset – Cal resets are itemized in Table 10.
Table 10. Reset – Cal
RESET
RESULT
SEE SECTION
All Q-RPT calibration
coefficients
PA to zero, PM to 1
5.3.1
Q-RPT absolute mode
ON
5.3.5
On-board barometer
calibration coefficients
PA to zero, PM to 1
5.2.2
Calibration date
Set all dates to 19800101
5.3.7
AutoZ values
All Poffset values to zero for absolute mode and
101325 Pa for gauge and negative gauge modes
3.5.1
AutoZ function
ON, all Q-RPT s, all measurement modes
3.5.1
3.5.9.5

<5 ALL>
PURPOSE
The reset - all function clears and deletes large amounts of user defined
information including critical calibration data.
Combines all resets in one global reset command that clears the entire user
section of non-volatile memory except the ID function (see Section 3.5.5.4) and
the security level password (see Section 3.5.5.5) returning RPM4 to the
“as delivered” condition. The Reset – All resets are itemized in Table 11.
Table 11. Reset – All
RESET
RESULT
SEE SECTION
Reset – Sets
All the resets of Reset - Sets
3.5.9.1
Reset – Units
All the resets of Reset - Units
3.5.9.2
Reset – Atest
All the resets of Reset - ATest
3.5.9.3
Reset – Cal
All the resets of Reset - Cal
3.5.9.4
Remote Interfaces
COM1, COM2 and IEEE-R88 interfaces to
default settings.
Remote Communications
Remote command format to Classic
3.5.2.3
Level (Security)
Reset security level to low
3.5.5.5
Parallel Measurement Mode
Off
3.5.7.3
Page 71
3.5.2
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
NOTES
© 2007 DH Instruments, a Fluke Company
Page 72
4. REMOTE OPERATION
4.
REMOTE OPERATION
4.1
OVERVIEW
Most of the RPM4 front panel functions can also be executed by commands from a remote computer.
The host computer can communicate to the RPM4 using the RPM4’s COM1 RS232 port or it’s IEEE-488 port.
Before writing code using RPM4 remote commands, familiarize yourself with its operating principles by
reviewing Section 3 of this manual.
4.2
INTERFACING
Sending a program message to the RPM4 places it into remote mode. The remote indicator to the right
of the display window lights when the RPM4 is in remote mode. It also flickers when a program message
is received. The menus usually accessed from the front panel are locked out while in remote. The [ESC]
key returns the RPM4 to local operation unless the <REMOTE> program message, which locks out all
keypad operation, was sent to the unit.
4.2.1
RS232 INTERFACE
4.2.1.1
COM1
The RPM4 COM1 RS232 interface is located on the back of the unit. It is a 9-pin
male DB-9F connector configured as a DCE device. Data is transmitted out of
the unit using pin 2, and is received on pin 3. This allows a normal pin-to-pin
DB-9M to DB-9F RS232 cable to be used to connect to a DTE host.
Handshaking is not required or supported. The COM1 receive buffer is
80 bytes deep. If you overflow the buffer by sending too much data, the data will
be lost. Because of this, you must send a single program message at a time
and you must wait for the RPM4 to reply from the previous command before
issuing another command.
Table 12. COM1 pin designations and connections
RPM4 COM1 DB-9F PIN DESIGNATIONS
PIN #
FUNCTION
2
TxD
This pin transmits serial data from the RPM4 to the host.
DESCRIPTION
3
5
RxD
Grn
This pin accepts serial data from the host computer.
This pin is the common return for the TxD and RxD signals.
IBM PC/XT DB-9F
CONNECTIONS
IBM PC/XT DB-9M TO RPM4 DB9F
CONNECTION
DB-25M
DB-9F
DB-9M
2
3
3
3
3
7
2
5
2
5
2
5
Page 73
DB-9F
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
4.2.1.2
IEEE-488
The RPM4 IEEE-488 interface is located on the back of the unit. The physical
and electrical interface conforms to IEEE Std 488.1-1987 Subset E2 and IEEE
Std. 488.2-1992. You should not attempt to communicate with the IEEE-488
interface while using the COM1 interface. The IEEE-488 receive buffer is 250
bytes deep. If you attempt to overflow the buffer, the RPM4 will hold off release
of the NRFD handshake line until it can service and empty the receive buffer.
This keeps the buffer from overflowing. It is recommended that you check for
errors using the “ERR?” query after sending a group of non-query program
messages. When using queries, ensure that you wait for a reply to each query to
ensue proper operation and order of command execution. Replies to queries
remain in the reply queue until the host gets them, so they can “stack up”,
causing replies to appear out of sequence.
4.2.1.3
COM2
The RPM4 COM2 RS232 interface is located on the back of the unit. It can be used
to allow the host computer to communicate with another device through the RPM4.
This allows the user to use one host COM port to communicate with the RPM4 and
an additional RS232 device. Refer to the “#” remote program command for
details.
COM2 is a 9-pin female DB-9F connector configured as a DTE device. Data is
transmitted out of the RPM4 using pin 3, and is received on pin 2. This allows a normal
pin-to-pin DB-9M to DB-9F RS232 cable to be used to connect to a DCE device.
Handshaking is not required or supported.
Table 13. COM2 DB-9F pin designations
4.3
PIN #
FUNCTION
2
RxD
This pin transmits serial data from the RPM4 to a device.
DESCRIPTION
3
4
5
TxD
DTR
Grn
This pin accepts serial data from the external device.
This pin is Data Terminal Ready (DTR) (held at + 5 V).
This pin is the common return for the TxD and RxD signals.
PROGRAMMING FORMATS
RPM4 supports two program message formats, the “classic”, and the “enhanced” formats. The user
must select which format to use. Selection can be accomplished from the front panel (see Section
3.5.2.3) or remotely using the “L2” or “L3” program message (see Section 4.4.4). The ”MSGFMT”
command can also be used to select the format, but is not recommended for new designs.
The main difference between the “classic” and “enhanced” formats is that when using the IEEE-488 interface,
a query operator “?” must be included in an enhanced command to yield a reply from the RPM4. When using
the COM1 port in classic or enhanced mode or using the IEEE-488 port in classic mode, every command has
a reply which the host must wait for before continuing. In addition, the enhanced message format supports
IEEE Std 488.2 syntax, format and status reporting. The default is the classic format.
In either format, it is recommended that you start out a command sequence with the “*CLS” command,
which clears all of the communication and error queues. The basic commands are similar for both the
classic and enhanced formats, but the usage, syntax, format and status reporting are different.
Many RPM4 classic and enhanced commands are common with DHI PPC2+, PPCK+ and PPC3
Pressure/Controller Calibrators.
© 2007 DH Instruments, a Fluke Company
Page 74
4. REMOTE OPERATION
4.3.1
CLASSIC PROGRAM MESSAGE FORMAT
Each program message sent is also a query. You can only send one program message to
the RPM4 at time. After sending any program message, you must wait for the RPM4 to reply
before sending another program message. This reply will contain data, or a numeric error
message if the program message was invalid. You must wait for this reply before issuing
another program message to the RPM4. This insures that the RPM4 has completed the
program message. Most remote program messages will return a reply within 500 ms except:
“PR?”, “PRR?”, “SR?”, “ATM?”, “RATE?”: Up to 2 seconds.
“RPT”, “ARANGE”, “AUTOZERO=RUN”: Up to 3 seconds
The syntax and format used for each program message in the classic mode is listed next to
the keyword “Classic”’ in each program message summary in Section 4.4.4.
4.3.2
ENHANCED PROGRAM MESSAGE FORMAT
The enhanced program message format uses the IEEE Std. 488.2 format, syntax and status
reporting. Errors are reported using the IEEE Std. 488.2 status reporting model. If an error is
reported, the error is put into an Error Queue and the “ERR?” query program message can
be used to get a text description of the most recent error. If you are using the IEEE-488 port,
the service request line can be setup to be asserted if this occurs (see Section 4.5.2). In the
enhanced format, there are two possible program message types for every program
message. Each of these two types starts with the same basic text referred to as the program
message header. The two types are COMMAND type and QUERY type commands.
4.3.2.1
USING COMMAND TYPE COMMANDS
Enhanced format commands DO NOT reply when using the IEEE-488 interface
unless a “?” is included in the command. Do not expect a response from the RPM4’s
IEEE-488 interface to non-query (no “?”) commands as there is none. Remote
software will time-out waiting for a response from RPM4. However, in RS232
communications, there is always a response and the response MUST be read prior to
issuing another command.
The COMMAND type of program message executes a process and can
additionally send data to the RPM4 in the form of comma delimited arguments.
This data is usually a setting of some sort that is stored in the RPM4. If data is
specified, it must be preceded by at least one white space from the program
message header and be within the range and format described in the program
message description. The keyword “Command:” appears to the left of the
required syntax in each program message description in Section 4.4.4.
If you are using the IEEE-488 port, the Command type does not generate a reply
unless you place a query operator “?” immediately after the command. You also
may send multiple program messages at once by separating each program
message with a semicolon. The commands are queued and executed in as
received order after the entire message stream has been received, so care in
determining order of execution is needed.
If you are using the RS232 port COM1, the Command type will always generate
a reply so you must wait for a reply before issuing another program message.
Because of this, you can only send one Command program message at a time
while using the COM1 port.
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© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
Examples:
•
IEEE-488 enhanced mode command series using query operator:
“*CLS?”
“UNIT? KPA”
“MMODE? A”
“PR?”
•
IEEE-488 enhanced mode commands without query operator:
“*CLS”
“UNIT KPA”
“MMODE A”
“ERR?”
•
(Clear the error queue. Wait for reply)
(Generates a reply. User must wait for reply before continuing)
(Generates a reply. User must wait for reply before continuing)
(Generates a reply. User must wait for reply before continuing)
(Clear the error queue. No reply)
(No reply)
(No reply)
(Wait for reply. User should use “ERR?” query following a
series of non query commands to check for errors that may
have occurred)
IEEE-488 enhanced mode multiple commands without query operator:
“*CLS”
“UNIT KPA;MMODE A”
“ERR?”
•
(Clear the error queue. No reply)
(Two command at once. No reply)
(Wait for reply. User should use “ERR?”
query following a series of non query
commands to check for errors that may
have occurred)
COM1 enhanced mode command:
“*CLS” or “*CLS?”
“UNIT KPA” or “UNIT? KPA”
“MMODE A” or “MMODE? A”
“PR” or “PR?”
4.3.2.2
(Clear the error queue. Wait for reply)
(Generates a reply. User must wait for
reply before continuing)
(Generates a reply. User must wait for
reply before continuing)
(Generates a reply. User must wait for
reply before continuing)
USING QUERY TYPE COMMANDS
The QUERY type of program message just requests data from the RPM4.
Placing the query operator “?” immediately after the command creates a query.
You must wait for a reply with a query. If you send any type of program
message to the RPM4 after a query before receiving a reply, the program
message is discarded and an error is generated. Errors are reported using the
IEEE Std. 488.2 status reporting model. A Query program message always ends
with a question mark. Most queries return a reply within 200 ms except:
“PR?”, “PRR?”, “SR?”, “ATM?”, “RATE?”: Up to 2 seconds.
“RPT”, “ARANGE”, “AUTOZERO RUN”: Up to 3 seconds
The syntax for using a QUERY program message is listed next to the keyword
“Query:” in each program message summary in Section 4.4.4. Please note that
queries in enhanced mode via the IEEE-488 port that results in an error will not
result in a reply. You must check the error queue (use the “ERR” querie) to see if
an error has occurred.
© 2007 DH Instruments, a Fluke Company
Page 76
4. REMOTE OPERATION
4.4
COMMANDS
4.4.1
PROGRAMMING MESSAGES
Some commands accept an optional suffix. This suffix can be used to specify the explicit Q-RPT
to address. In most cases, each Q-RPT in the RPM4 operates as an independent measurement
device. If the suffix is not specified, then the “Active” Q-RPT is assumed.
The “RANGE” or “ARANGE” command can be used to select the “Active” Q-RPT. See the
program message descriptions for suffix use with a specific command.
Table 14. Program message list
COMMAND
‘n’ indicates an
optional suffix
#
ABORT
ARANGEn
ATM
AUTOZEROn
AUTOZEROn=RUN
CALAMB
COM1
COM2
CONTn
DATE
ERR
GPIB
HEAD
ID
L2
L3
LOCAL
MEM
MMODEn
MSGFMT
PCALn
PCAL:XX
PRn
PRRn
QPRRn
RANGE
RATEn
READRATEn
READYCKn
REMOTE
RESn
RESET
RPTn
SCRSAV
SN
SRn
SSn
SS%n
TIME
UCOEFn
UDU
ULn
UNITn
VER
ZOFFSETn
ZOFFSET:XX
DESCRIPTION
Send a command string out of the RPM4 COM2 port.
Stop pending operations
Read or set a new AutoRange to use.
Read the current atmospheric pressure (on-board barometer).
Read or set the status of the AutoZ automatic zeroing function.
Run AutoZero.
Read or set the on-board barometer calibration
Read or set the configuration of the COM1 port.
Read or set the configuration of the COM2 port.
Enable continuous measurements
Read or set the current date.
Read the last error message.
Read or set the GPIB interface address.
Read or set the fluid head settings.
Read or set the RPM4 alphanumeric asset ID tag.
Selects “classic” program message format
Selects “enhanced” program message format
Return control to the RPM4 front panel.
Read the power-up memory test status.
Read or change the active measurement mode.
Read or set the type of program message format to use.
Read or set the user Lo Q-RPT calibration information.
Read or set the user Lo Q-RPT calibration information (old command).
Read the next RPM4 pressure.
Read the next RPM4 pressure, rate, and ATM.
Read the last RPM4 pressure, rate and ATM.
Select a Q-RPT to be “active” in it’s default full scale range
Read the next available rate of change of pressure.
Read or set the Q-RPT measurement read rate and mode
Read or set a flag that is cleared by a Not Ready condition.
Enable remote local lockout operation.
Read or set the pressure display resolution for the current transducer and range.
Reset the RPM4 to default user parameters.
Read the available Q-RPT data.
Read or set the front panel screen saver period.
Read the serial number of the RPM4.
Read the next available pressure status (Ready/Not Ready).
Read or set the stability required for a Ready condition.
Read or set the stability required for a Ready condition (% span/ s).
Read or set the current time of day.
Convert a pressure in Pascal to pressure in the current units.
Read or set the user defined pressure unit.
Read or set the upper limit for the current range.
Read or set the pressure unit of measure for the current range.
Read the RPM4 software version.
Read or set the AutoZero Zoffset for the specified Q-RPT.
Read or set the AutoZ Zoffset for the specified Q-RPT (old command).
Page 77
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
4.4.2
ERROR MESSAGESS
Table 15. Error #s and descriptions
REPLY
ERR# 0
ERR# 2
ERR# 3
ERR# 4
ERR# 5
ERR# 6
ERR# 7
ERR# 8
ERR# 9
ERR# 10
ERR# 11
ERR# 12
ERR# 13
ERR# 14
ERR# 17
ERR# 18
ERR# 19
ERR# 20
ERR# 21
ERR# 22
ERR# 23
ERR# 25
ERR# 26
ERR# 27
ERR# 28
ERR# 29
ERR# 30
ERR# 31
ERR# 32
ERR# 37
ERR# 38
ERR# 39
ERR# 45
ERR #46
ERR #52
ERR# 53
© 2007 DH Instruments, a Fluke Company
DESCRIPTION
“OK”
“Text argument is too long”
“Arguments cannot be 0”
“External device not detected”
Not used
“Numeric argument missing or out of range”
“Missing or improper command argument(s)”
“External device time-out error”
“Unknown command”
“Missing or invalid command suffix”
“Command missing argument”
“System overpressured” or “overpressure may result”
“Text queue overflow”
“User unit not defined”
Not used
“Command not yet available”
“Not available with absolute units”
“Not available with gauge device”
Not used
“Pressure is not stable”
“Option not available or installed”
Not used
“COM port failed to initialize”
“Internal device failure”
“Device failure”
“Device not available”
“Must be on range HI”
“Exceeds upper or lower limit”
“Not stable enough”
“Data table is full”
“Selected range is not available”
“Data verify error”
“Argument not allowed”
“Argument cannot be negative”
“Command obsolete”
“Not Available”
Page 78
4. REMOTE OPERATION
4.4.3
PROGRAM MESSAGE DESCRIPTION OVERVIEW
Each program message description is separated into the following sections:
Purpose
Command
Query
Classic
Suffix
Arguments
Default
Remarks
Example
Errors
See Also
A brief description of the programs message’s function.
This is the Enhanced program message syntax to send data to the RPM4 or to execute
an RPM4 function. The RPM4 must be set to use the enhanced format (see Section
3.5.2.3) to use the syntax and style shown. It may be sent alone, or followed by at least
one white space and additional argument(s) to show that arguments can be passed. If
there are multiple arguments, then commas must separate them. If you are using the IEEE488 port, multiple command type program messages can be sent in one message if you
separate them with a semicolon. There will be no reply from the RPM4 using the IEEE488 port unless the command is immediately followed by the query operator “?”. If you
are using the COM1 port, the PPC1 will reply and you must wait for this reply. If this field
is not listed in the program message description, then the Command type is not supported
when using the Enhanced format.
This is the Enhanced program message syntax to request data from the RPM4. The RPM4
must be set to use the enhanced format (see Section 3.5.2.3). The RPM4 will always
reply to a query. You must wait for this reply before issuing another program message.
If this field (Query) is not listed in the program message description, then the Query type
for the program message is not supported when using the Enhanced format.
This is the Classic program message syntax to send data to the RPM4, to execute an
RPM4 function, or to query for data. The RPM4 must be set to use the classic format
(see Section 3.5.2.3). The command may be followed by a ‘(=)’ and additional argument
characters to show that argument(s) can be passed. If there are multiple arguments, then
commas must separate them. The RPM4 will always reply to a Classic program message.
You must wait for this reply before issuing another program message. If this field is not listed
in the program message description, then it is not supported when using the classic
format.
Some commands support an optional suffix. This suffix is used to specify a Q-RPT to which
the command applies, since many settings are Q-RPT specific:
Suffix of ‘1’ for Hi Q-RPT access
Suffix of ‘2’ for Lo Q-RPT access
Suffix of ‘3’ for HL Q-RPT access.
If an optional suffix is allowed but not given, then the “Active Q-RPT” will be addressed. The
“Active Q-RPT” is the Q-RPT that is currently displayed on the top line of the front panel of the
RPM4, and is identified by the text label in the upper right of the pressure display screen. The
last Q-RPT ranged or selected using the “RANGE” or “ARANGE” commands is the “Active” QRPT. The “ARANGE”, “RANGE” or “RPT” command query can be used to determine which
Q-RPT is currently active. With the Hi Q-RPT In differential mode of operation, there are some
limitations on access to the Lo Q-RPT, and with the HL Q-RPT there are limitations on access
to both the Hi and the Lo Q-RPTs independently.
If the program message can be used to set data inside the RPM4, then this section describes
the arguments and their limits.
If the program message can be used to set data inside the RPM4, then this line shows
(using the enhanced format) the default setting from the factory.
This field has the details and remarks about the command.
Examples are given for the enhanced and classic methods.
Enhanced:
An example of the use of an enhanced format program message to be
sent to the RPM4 is shown. The message sent to the RPM4 appears after
the “Cmd sent:” label. If only a Query type exists, the “Query sent:”
label is shown instead. Directly under this label, “Query reply” shows a
typical reply to a query type. “Reply:” shows that a query format does
not exist. It may have a short description next to it.
Classic:
An example of the use of a classic program message to be sent to the
RPM4 is shown. The command sent to the RPM4 appears after the
“Cmd sent:” label. The “Reply” label shows a typical reply to the
“Sent” example. It may have a short description next to it.
If the program message can report an argument error, the types of errors are listed.
If using the classic format or the COM1 port, the error message is replied after receiving
the program message. If using the enhanced format via the IEEE-488 port, the error
condition is handled by the status reporting model which stores the errors in an Error
Queue and can be programmed to assert the IEEE-488 SRQ line to signal an error has
occurred. In either case, the “ERR” or “ERR?” program message can be used to
retrieve a text description of the error.
Indicates related commands (“----“) and refers to manual sections giving detail on RPM4
operation corresponding to the program message.
Page 79
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
4.4.4
#
Purpose
Classic
Arguments
Remarks
Example
(classic)
See Also
ABORT
Purpose
Command
Classic
Remarks
Example
(enhanced)
Example
(classic)
See Also
PROGRAM MESSAGE DESCRIPTIONS
To allow the host PC to communicate with a device connected to the RPM4 COM2 port.
“#xx”
The string to send out of the RPM4 COM2 port. It must be less than
xx:
40 characters long.
The RPM4 COM2 port can be used to communicate to another RS232 device (such as
another RPM4). This allows the user to use a single COM port or IEEE-488 port on the
host computer to communicate with the RPM4 and another RS232 device. A carriage
return and a line feed (<CR><LF>) are added to the string.
After this program message is issued, the RPM4 will reply back every string received by
the RPM4 COM2 port that is terminated with a carriage return. Line feeds are discarded.
This will discontinue when the next query is sent to the RPM4.
There is no other reply from this program message. Prior to using this program message,
you must ensure that the RPM4 COM2 port is correctly set up to communicate with the
device on COM2. Refer to the “COM2=“ program message.
Sent:
“#VER”
Reply:
“DH INSTRUMENTS, INC RPM4 us A1000/A0015 Ver2.00 ”
This example assumes that a second RPM4’s COM1 port is connected to the RPM4
COM2 port. This example gets the version of the second RPM4.
“COM2”
3.5.2
Cancels any pending data requests by the “PR”, “PRR” “RATE”, “SR” or “CONT”
commands.
“ABORT”
“ABORT”
This program message is usually used to ensure the RPM4 is in an idle condition.
Cmd sent:
“ABORT”
Reply:
“ABORT” (no reply if IEEE-488)
Sent:
“ABORT”
Reply:
“ABORT”
“PR”, “PRR” “RATE”, “SR” or “CONT”
© 2007 DH Instruments, a Fluke Company
Page 80
4. REMOTE OPERATION
ARANGEn
Purpose
Command
Query
Classic
Query
Optional Suffix
Arguments
Remarks
Example
(enhanced)
Example
(classic)
Example
(enhanced)
Example
(classic)
Example
(enhanced)
Example
(enhanced)
Errors
See Also
ATM
Purpose
Query
Classic
Remarks
Example
(enhanced)
Example
(classic)
Errors
See Also
Read or set a new AutoRange range to use.
“ARANGEn Range, unit, mode (,RptLabel)”
(set to user defined range)
“ARANGE Q-RPTLabel”
(set to Q-RPT default range)
“ARANGEn?”
“ARANGEn= Range, units, mode (,RptLabel)”
(set to user defined range)
“ARANGE= Q-RPTLabel”
(set to Q-RPT default range)
“ARANGEn”
A suffix may be used instead of “RptLabel”
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
The AutoRange maximum pressure. Cannot be negative.
Range:
The unit of measure of the Range argument.
Unit:
The measurement mode of the Range argument:
Mode:
“A” for absolute
“G” for gauge
One of the Q-RPTs that is available.
RptLabel:
(optional)
“IH”: Hi Q-RPT
“IL”: Lo Q-RPT
The ARANGE command is used to define an RPM4 range by specifying a desired unit of
measure, measurement mode and maximum pressure, and have the RPM4 pick the best
available Q-RPT and make adjustments to optimize operation in that range.
The optional suffix or the “RptLabel” argument can be used to specify which Q-RPT you
wish to use for the AutoRange range instead of allowing the RPM4 to pick the best QRPT. By using this option you can override the internal logic that picks the most suitable QQ-RPT. This Q-RPT specified must be valid for the maximum pressure and measurement
mode specified.
The reply indicates the current range data, including the Q-RPTLabel used for the range.
If “inWa” is specified for the unit, the temperature reference can be given after the unit
text (“inWa4”, “inWa20” or “inWa60” corresponding to inWa at 4 °C, 20 °C or 60 °F). If no
number is given, a default of 20 °C is assumed. There is no indication of the temperature
reference in the reply.
If you just specify the Q-RPTLabel without any other arguments, the Q-RPT specified will
become active in it’s last range and settings. The previously set unit and measurement
mode for the Q-RPT specified will become active.
Cmd sent:
“ARANGE?”
(read the current range in the current units)
Query reply:
“100.00, psi, A, IH”
Cmd sent:
“ARANGE”
(read the current range in the current units)
Query reply:
“100.00, psi, A, IH”
Cmd sent:
“ARANGE? 250, inWa4, G (range of 250 inWa @ 4 °C in gauge mode)
Query reply:
“250.00 inWa, G, IH”
(Lo Q-RPT is used)
Cmd sent:
“ARANGE=500, kPa, G
(range of 500 kPa in gauge mode)
Query reply:
“500.00 kPa, G, IL”
(Lo Q-RPT is used)
Cmd sent:
“ARANGE2 50, psi, A
(range of 50 psi in absolute mode on
the Lo Q-RPT)
Query reply:
“50.000 psi, A, IL”
(No reply if GPIB-488)
“ARANGE IH
(Hi Q-RPT’s previous range made active)
Cmd sent:
“500.000 kPa, A, IH”
(No reply if GPIB-488)
Query reply:
“Range“ maximum pressure exceeds available Q-RPTs or is negative.
ERR# 6:
RPT specified by the optional suffix is not valid for the current operating
ERR#10:
conditions
Cannot Range to ‘0’ with absolute units.
ERR# 19:
Cannot Range to ‘0’ with gauge units.
ERR# 20:
Correct type of Q-RPT for the selected “Mode” is not available.
ERR# 29:
RPT specified is not available.
ERR# 53:
“RPT”, “RANGE”, “MMODE”, “UNIT”
3.3.4, .3.2.3, 3.3.3, 3.3.2
Reads the next measured pressure from RPM4’s on-board barometer (if present).
“ATM?”
“ATM”
The atmospheric pressure as measured by the RPM4 on-board barometer is returned in
the current pressure units of the active Q-RPT (always absolute). This measurement is
followed by the units text. Not all RPM4s are equipped with an on-board barometer.
Query sent:
“ATM?”
Query reply:
“97.12348 kPa a”
Sent:
“ATM”
Reply:
“97.12384 kPa a”
ERR# 23:
RPM4 is not equipped with a barometer.
3.5.7.1, 3.2.2
Page 81
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
AUTOZEROn
Purpose
Command
Query
Classic
Read or set the status of the AutoZ function.
“AUTOZEROn state”
“AUTOZEROn?”
“AUTOZEROn= state”
“AUTOZEROn”
“AUTOZERO1”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
Default
Optional Suffix
Arguments
‘state’:
’0’ Autozero OFF
’1’ Autozero ON
The RPM4 AutoZ function can be turned ON and OFF. There is a separate AutoZ flag for
the gauge, absolute, and differential measurement modes for each Q-RPT. This
command sets the AutoZ status for the current mode of the specified or the active Q-RPT
only. To set the sate of AutoZ for a measurement mode, you must be in that mode.
Cmd sent:
“AUTOZERO 0”
Query reply:
“0”
(No reply if GPIB-488)
Sent:
“AUTOZERO=0”
Query reply:
“AUTOZERO=0”
ERR# 7:
The argument was other than ‘0’ or ‘1’.
ERR# 10:
The suffix is invalid.
“ZOFFSET”, “MMODE”
3.5.1
Remarks
Example
(enhanced)
Example
(classic)
Errors
See Also
AUTOZEROn=RUN
Purpose
Command
Query
Classic
Optional Suffix
Arguments
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(classic)
Errors
See Also
CALAMB
Purpose
Command
Query
Classic
Defaults
Arguments
Remarks
Example
(enhanced)
Example
(classic)
Errors
See Also
Run the AutoZero routine.
“AUTOZEROn RUN (,Pref)”
“AUTOZEROn? RUN (,Pref)”
“AUTOZEROn= RUN (,Pref)”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
‘Pref’:
The AutoZ reference pressure in Pa. Optional when the RPM4 is not in
absolute measurement mode, as the reference is usually “0”.
The RPM4 AutoZ function can be remotely run with this command only if AutoZero is ON.
You should ensure that the pressure is stable for valid determination of Zoffset.
Cmd sent:
“AUTOZERO RUN”
Query reply:
“OK”
(No reply if GPIB-488)
Cmd sent:
“AUTOZERO? RUN, 97283” (abs AutoZero to 97283 Paa)
Query reply:
“OK”
Sent:
“AUTOZERO=RUN”
Query reply:
“OK”
An argument was not given for the AutoZ reference in absolute mode.
ERR# 6:
Invalid suffix
ERR# 10:
AutoZero is currently OFF.
ERR# 53
“ZOFFSET”, “MMODE”, “AUTOZERO”
3.3.9, 3.5.1
Read or set the on-board barometer calibration.
“CALAMB adder, mult, CalDate”
“CALAMB?”
“CALAMB=adder, mult, CalDate”
“CALAMB”
“CALAMB = 0.0, 1.0, 19800101”
The Barometer calibration adder (PA), in Pascal.
Adder:
The Barometer calibration multiplier (PM) from 0.1 to 100.
Mult:
The date of the calibration in the format “YYYYMMDD”
CalDate:
The barometer calibration information can be accessed with this program message. Using this
program message overwrites the current calibration coefficients, so caution must be used.
Changes made take effect immediately.
Cmd sent:
“CALAMB? 2.1, 1.000021, 20011201”
Query reply:
“
2.10, 1.000021, 20011201”
Sent:
“CALAMB=2.1, 1.000021, 20011201”
Reply:
“
2.10, 1.000021, 20011201”
ERR# 6:
One of the arguments is out of range.
3.5.7.1, 5.2.2
© 2007 DH Instruments, a Fluke Company
Page 82
4. REMOTE OPERATION
COM1
Purpose
Command
Query
Classic
Arguments
Defaults
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(classic))
Errors
See Also
COM2
Purpose
Command
Query
Classic
Arguments
Defaults
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(classic)
Errors
See Also
Read or set the RS232 settings for the COM1 port.
“COM1 baud, parity, data, stop”
“COM1?”
“COM1=baud, parity, data, stop”
“COM1”
The baud rate. This may be ‘300’, ‘600’,’1200’,’2400’,’4800’, ‘9600’ or ‘19200’.
Baud:
The data parity. This may be ‘O’ for odd, ‘E’ for even, or ‘N’ for none.
Parity:
The number of data bits. This may be ‘7’ or ‘8’.
Data:
The number of stop bits. This may be ‘1’ or ‘2’.
Stop:
“COM1 2400,E,7,1”
The COM1 port is used to communicate to the RPM4. When the COM1 port configuration of the
RPM4 is changed, the program message reply (COM1 use only) is sent at the old COM1 settings,
but all subsequent communications are accomplished at the new COM1 settings.
A 250ms or longer delay after receiving the reply to this command will ensure that the RPM4 has
changed the COM port settings and is ready for communications at the new settings.
Cmd sent:
“COM1 9600,N,8,1”
Query reply:
“9600,N,8,1”
(No reply if GPIB-488)
Cmd sent:
“COM1? 9600,N,8,1”
Query reply:
“9600,N,8,1”
Sent:
“COM1=9600,N,8,1”
Reply:
“9600,N,8,1”
ERR# 7:
Missing or improper program message argument(s).
“COM2”
3.5.2.1
Read or set the RS232 settings for the COM2 port.
“COM2 baud,parity,data,stop”
“COM2?”
“COM2= baud,parity,data,stop”
“COM2”
baud:
The baud rate. This may be ‘300’, ‘600’,’1200’,’2400’,’4800’, ‘9600’ or ‘19200’.
parity:
The data parity. This may be ‘O’ for odd, ‘E’ for even, or ‘N’ for none.
The number of data bits. This may be ‘7’ or ‘8’.
Data:
stop:
The number of stop bits. This may be ‘1’ or ‘2’.
“COM2 2400,E,7,1”
COM2 is generally used to allow the host computer to communicate through the RPM4 to an
additional device connected to COM2. This can be useful if the host computer does not have 2
serial ports available.
Cmd sent:
“COM2 9600,N,8,1”
Query reply:
“9600,N,8,1”
(No reply if GPIB-488)
Cmd sent:
“COM2? 9600,N,8,1”
Query reply:
“9600,N,8,1”
Sent:
“COM2=9600,N,8,1”
Reply:
“9600,N,8,1”
ERR# 7:
Missing or improper program message argument(s).
“COM1”
3.5.2.1
Page 83
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
CONTn
Purpose
Query
Classic
Optional Suffix
Remarks
Example
(enhanced)
Example
(classic)
See Also
DATE
Purpose
Command
Query
Classic
Arguments
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(classic)
Errors
See Also
ERR
Purpose
Query
Classic
Remarks
Example
(enhanced):
Example
(classic)
See Also
Have the RPM4 reply continuously as each new measurement becomes available.
“CONTn?”
“CONTn”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
This command is somewhat different from most as it enables the RPM4 to continuously output the
selected Q-RPT’s measurement without further queries. This continues until the next query is
received by the RPM4, or if the ABORT” or “*CLS” command is received. The frequency of the
measurements is determined by the readrate of the Q-RPT. The data returned includes the
pressure of the specified or active Q-RPT, current unit of measure and measurement mode.
Query sent:
“CONT1?”
Query reply:
“1936.72 kPa a” (repeats every measurement cycle)
Query sent:
“CONT”
Reply:
“1936.72 kPa a” (repeats every measurement cycle)
“PR”, “READRATE”, “ABORT”
Read or set the RPM4 date.
“DATE date”
“DATE?”
“DATE= date”
“DATE”
date:
The date in the numerical only format “YYYYMMDD”
The RPM4 has an internal real time calendar clock. The span of acceptable dates ranges
from 19800101 to 20791231. The reply is always in the YYYYMMDD format.
Cmd sent:
“DATE 20030115”
Query reply:
“20030105”
(No reply if GPIB-488)
Cmd sent:
“DATE? 20030105”
Query reply:
“20030105”
Sent:
“DATE=20021201”
Reply:
“20021201”
ERR# 6:
Missing or improper program message argument(s).
“TIME”
3.5.5.3
Read the new available error message from the Error Queue.
“ERR?”
“ERR”
This program message obtains additional details about an error that has occurred. If the user
receives an “ERR# nn” reply, or the enhanced mode is enabled using the IEEE-488 interface and
an error has been detected, the error is put into a FIFO Error Queue. The “ERR” program
message pulls and replies the oldest error message available. In “classic” mode only the most recent
error can reside in the queue. “OK” is replied if there are no error messages left. If an error occurs in
enhanced mode using the IEEE-488 interface, no reply is generated even if the command was a
query.
Query sent:
“ERR?”
Query reply:
“Numeric argument missing or out of range”
Sent:
“ERR”
Reply:
“Numeric argument missing or out of range”
4.4.2
© 2007 DH Instruments, a Fluke Company
Page 84
4. REMOTE OPERATION
GPIB
Purpose
Command
Query
Classic
Defaults
Arguments
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(classic)
Errors
See Also:
HEAD
Purpose
Command
Query
Classic
Defaults
Arguments
Remarks
Example
(enhanced)
Example
(classic)
Errors
See Also:
ID
Purpose
Command
Query
Classic
Arguments
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(classic)
Errors
See Also
Read or set the GPIB interface address.
“GPIB addr”
“GPIB?”
“GPIB=addr”
“GPIB”
“GPIB 10”
The address of the IEEE-488 (GPIB) interface (1 to 30)
Addr:
The GPIB address is changed following the reply of this command. Each device on a GPIB
interface bus requires a unique address.
Cmd sent:
“GPIB 21”
Query reply
“21”
(No reply if GPIB-488)
Cmd sent:
“GPIB? 21”
Query reply
“21”
Sent:
“GPIB=21”
Reply:
“21”
ERR# 6:
The argument is not within given limits.
3.5.2.2
Read or set the fluid head settings.
“HEAD height, units, fluid”
“HEAD?”
“HEAD=height, units, fluid”
“HEAD”
“HEAD 0, cm, N2”
The height of the test in relation to the RPM4. The value is positive if the test is
height:
above the RPM4, or negative if below the RPM4. The value can be between 9999 and 9999. Setting the value to ‘0’ disables the head correction.
The height units. This must be “in” or “cm”.
units:
The fluid type. This must be “N2”, “Air”, “He”, “Oil”, “H2O”, or “User”.
gas:
The RPM4 can make a fluid head correction to allow it to display the pressure at a level other than
the reference level of the RPM4.
Cmd sent:
“HEAD? 10,in,N2”
Query reply:
“10, in, N2”
Sent:
“HEAD=10,in,N2”
Reply:
“10, in, N2”
The fluid text is too long
ERR# 2:
The height is not within given limits or the unit is invalid.
ERR# 6:
The fluid text is invalid
ERR #7:
3.3.7, 3.5.3
Read or set the user defined instrument identification label.
“ID string”
“ID”
“ID=string”
“ID”
An alphanumeric string up to 12 characters long.
String:
The user defined ID label can be used to allow the user to “tag” the RPM4 with a unique
identifier. This ID is stored in non-volatile memory and cannot be erased by a power failure,
system fault or reset. The ID should not be changed frequently, as the non-volatile memory
may fail after 100,000 write operations.
Cmd sent:
“ID RPM4 #A01”
Query reply
“RPM4 #A01”
(No reply if GPIB-488)
Cmd sent:
“ID? RPM4 #A01”
Query reply
“RPM4 #A01”
Sent:
“ID=RPM4 #A01”
Reply:
“RPM4 #A01”
ERR# 6
The ‘string’ argument was longer than 12 char.
3.5.5.4
Page 85
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
L2 / L3
Purpose
Command
Defaults
Remarks
Example
(enhanced)
Example
(classic)
See Also
LOCAL
Purpose
Command
Classic
Remark
Example
(enhanced)
Example
(enhanced)
Example
(classic)
See Also
MEM
Purpose
Query
Classic
Remarks
Example
(enhanced)
Example
(classic)
See Also
Read or set the type of program command format to use (classic or enhanced).
“L2”
enables “classic” mode
“L3”
enables “enhanced” mode
“L2”
(Classic mode)
The user can select the type of remote command format using these simplified commands.
There is no query format. This format must agree with the format sent to the RPM4. This
command is a replacement for the “MSGFMT” command.
Cmd sent:
“L3”
Query reply:
“L3”
(No reply if IEEE-488)
Sent:
“L2”
Reply:
“L2”
“MSGFMT”
4.3, 3.5.2.3
Returns control to the RPM4 front panel.
“LOCAL”
“LOCAL”
The REMOTE program message can lock the front panel out completely. The user can return
to local operation by sending the LOCAL program message, sending the IEEE-488 ‘GTL’
command (if in enhanced format), or by cycling RPM4 power.
Cmd sent:
“LOCAL”
Reply:
“LOCAL”
(no reply if IEEE-488)
Cmd sent:
“LOCAL?”
Reply:
“LOCAL”
Sent:
“LOCAL”
Reply:
“LOCAL”
“REMOTE”
Read the status from the power-up memory test.
“MEM?”
“MEM”
The RPM4 system memory stores the user settings (units, resolution) and retains them when
the unit is OFF. On power-up, this memory is checked. If this memory is corrupted, all user
settings are reset to default , and the MEM status is set to reflect this.
Query sent:
“MEM?”
Reply:
“0” RPM4 data corrupted and was set to factory defaults.
“1” The memory was found to be OK on power-up.
Sent:
“MEM”
Reply:
“MEM=0” RPM4 data corrupted and was set to factory defaults.
“MEM=1” The memory was found to be OK on power-up.
3.5.9, 3.5.7.5
© 2007 DH Instruments, a Fluke Company
Page 86
4. REMOTE OPERATION
MMODEn
Purpose
Command
Query
Classic
Optional Suffix
Arguments
Read or change the active measurement mode.
“MMODEn mode”
“MMODEn?”
“MMODEn=mode”
“MMODEn ”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
Mode:
"A"
"G"
Absolute mode
Gauge mode
Measured pressure values are returned with “g” to identify measurement
mode for both gauge and negative gauge measurement modes. Differential mode
restricts access to settings on the Lo Q-RPT.
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(enhanced)
Errors
See Also
MSGFMT
Purpose
Command
Query
Classic
Arguments
Defaults
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(classic)
Errors
See Also
The measurement mode can also be set using the “UNIT” command but the “UNIT” command
does not distinguish between gauge and negative gauge in it’s reply, while the “MMODE”
does. Measurement mode is range specific.
Cmd sent:
“MMODE A”
Query reply:
“A”
(No reply if IEEE-488)
Cmd sent:
“MMODE? A”
Query reply:
“A”
Cmd sent:
“MMODE=G”
Query reply:
“G”
Invalid argument text.
ERR# 6:
Abs mode only with altitude units or gauge mode only with gauge Q-RPT.
ERR# 7:
The suffix indicating the Q-RPT is invalid for the current conditions.
ERR#10:
Absolute or negative gauge mode not available with gauge Q-RPT.
ERR# 20:
Absolute Q-RPT with an absolute and negative gauge OFF calibration.
The current range cannot support gauge mode.
Gauge mode range would be negative.
ERR# 53:
Lo Q-RPT not suitable for differential mode.
“UNIT”, “ARANGE”
3.3.3
Read or set the type of program command format to use (enhanced or classic).
“MSGFMT mode
“MSGFMT?”
“MSGFMT= mode
“MSGFMT”
‘1’ to use the enhanced command format.
mode:
‘0’ to use the classic command format.
“MSGFMT 0”
The user can select the type of remote command format to use. This format must agree with the
format sent to the RPM4
The enhanced query form of this command (“MSGFMT? n”) should always be used to set the
desired format, as it will be accepted regardless of the current format (classic or enhanced).
It is recommended to use the “L2” and “L3” commands instead of this command for new designs.
Cmd sent:
“MSGFMT 1”
Query reply:
“1”
(No reply if IEEE-488)
Cmd sent:
“MSGFMT? 1”
Query reply:
“1”
Sent:
“MSGFMT=1”
Reply:
“MSGFMT=1”
ERR# 6:
Missing or improper program message argument(s).
“L2 / L3”
4.3, 3.5.2.3
Page 87
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
PCALn
Purpose
Command
Query
Classic
Defaults
Optional Suffix
Arguments
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(enhanced)
Example
(classic)
Errors
See Also
PRn
Purpose
Query
Classic
Optional Suffix
Remarks
Example
(enhanced)
Example
(classic)
See Also
Read or set the calibration information for the Hi or Lo Q-RPT.
“PCALn adder, mult, CalDate”
“PCALn?”
“PCALn= adder, mult, CalDate”
“PCALn”
“PCALn = 0.0, 1.0, 19800101”
The active Q-RPT is assumed if no suffix is given. The Hi Q-RPT is assumed if the HL
“n”
Q-RPT is active and no suffix is given.
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
The Q-RPT calibration adder (PA). In Pascal.
Adder:
The Q-RPT calibration multiplier (PM) from 0.1 to 100.
Mult:
The date of the calibration in the format “YYYYMMDD” by default. Any other
CalDate:
format up to 8 characters long is also accepted, and the replied format is in th
previously entered format.
The user defined pressure calibration information for the specified Q-RPT (Hi or Lo) can be
accessed with this program message. The HL Q-RPT does not have it’s own calibration
information. Using this program message overwrites the current calibration coefficients, so caution
must be used. Changes made using this program message take effect immediately.
For compatibility with the obsolete style PPC3 “PCAL:HI” and “PCAL:LO” commands, “:HI” and
“:LO” can be used in place of the suffix “n” but this is not recommended for new applications.
Cmd sent:
“PCAL2? 2.1, 1.000021, 20011201”
Query reply:
“ 2.10 Pa, 1.000021, 20011201” (No reply if GPIB-488)
Cmd sent:
“PCAL? 2.1, 1.000021, 20011201”
Query reply:
“ 2.10 Pa, 1.000021, 20011201”
Cmd sent:
“PCAL:HI? 2.1, 1.000021, 20011201” (PPC3 style is OK)
Query reply:
“ 2.10 Pa, 1.000021, 20011201”
Sent:
“PCAL1=2.1, 1.000021, 20011201”
Reply:
“ 2.10 Pa, 1.000021, 20011201”
ERR# 6:
One of the arguments is out of range.
ERR# 10:
The suffix is invalid.
5.3
Read the next available pressure measurement.
“PRn?”
“PRn”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
The next available pressure value for the specified or active Q-RPT is read in the current pressure
units. The data returned also contains Ready/Not Ready information, and the pressure unit of
measure and measurement mode.
The reply field is always 20 characters long. The first 3 characters of the reply are reserved for the
ready status. The ready status is described in the “SR” program message. The pressure value and
pressure unit of measure are right justified in this field.
After receiving this program message, the RPM4 replies back with the data after a new pressure
measurement cycle is complete. This can take up to the current read rate period (1.2 seconds by
default).
Query sent:
“PR?”
Query reply:
“R
1936.72 kPa a”
Query sent:
“PR”
Reply:
“R
1936.72 kPa a”
“PRR”, “QPRR”, “SR”, “ABORT”, “READRATE”, “CONT”
3.1.1, 3.2.1, 3.5.7.2
© 2007 DH Instruments, a Fluke Company
Page 88
4. REMOTE OPERATION
PRR
Purpose
Query
Classic
Optional Suffix
Remarks
Example
(enhanced)
Example
(classic)
See Also
QPRR
Purpose
Query
Classic
Optional Suffix
Remarks
Example
(enhanced)
Example
(classic)
See Also
Read the next available Ready condition, pressure measurement, rate and on-board
barometer reading.
“PRR?”
“PRR”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
The next available Ready condition, Q-RPT pressure measurement, rate of pressure change,
and barometric pressure is replied in the current pressure unit of measure. . This can take up
to the current read rate period (1.2 seconds by default). Each data field is separated by a
comma, and is returned in the following order:
ready, pressure UNITS, rate UNITS/s, atm UNITS
Here are the field descriptions:
ready:
Three character ready status field. Refer to the “SR” command.
pressure:
The measured pressure for the active Q-RPT in the current pressure unit.
This is followed by the current pressure unit.
rate:
The measured rate of pressure change for the active Q-RPT in the current
pressure unit per second. This is followed by the current pressure unit of measure.
atm:
The pressure measured by the RPM4 on-board barometer in the current
pressure unit (and always absolute). This is followed by the current pressure
unit. Not all RPM4s are equipped with an on-board barometer. This field is
missing if the RPM4 is not equipped with an on-board barometer.
Query sent:
“PRR?”
Query reply:
“R,2306.265 kPaa,0.011 kPa/s,97.000 kPa a”
“R,2306.265 kPaa,0.011 kPa/s”
(no barometer)
Query sent:
“PRR”
Reply:
“R,2306.265 kPaa,0.011 kPa/s,97.000 kPa a”
“PR”, “QPRR”, “SR”
3.1.1, 3.2.1, 3.5.7.1
Read the last Q-RPT pressure measurement, pressure rate and on-board barometer output
immediately.
“QPRR?”
“QPRR”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
The last measured Ready/Not Ready condition, active Q-RPT pressure measurement, rate of
pressure change, and barometric pressure is replied in the current pressure unit of measure
immediately. This program message is useful when a rapid response of measured pressure
is needed. It does not result in quicker pressure measurements. Each data field is separated
by a comma, and is returned in the following order:
Ready, pressure UNITS, rate UNITS/s, atm UNITS
Here are the field descriptions:
ready:
Three character ready status field. Refer to the “SR” command.
pressure:
The measured pressure for the selected Q-RPT in the current pressure unit.
This is followed by the current pressure unit and measurement mode.
rate:
The measured rate of pressure change for the active Q-RPT in the current
unit of pressure per second. This is followed by the current pressure unit.
atm:
The pressure measured by the RPM4 on-board barometer in the current
pressure unit (but always absolute). This is followed by the current pressure
unit. Not all RPM4s are equipped with an on-board barometer. This field is
missing if the RPM4 is not equipped with a barometer.
Query sent:
“QPRR?”
Query reply:
“R,2306.265 kPa a,0.011 kPa/s,97.000 kPa a”
“R,2306.265 kPa a,0.011 kPa/s” (no barometer)
Query sent:
“QPRR”
Reply:
“R,2306.265 kPa a,0.011 kPa/s,97.000 kPa a”
“PR”, “PRR”, “SR”
3.1.1, 3.2.1, 3.5.7.1
Page 89
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
RANGE
Purpose
Command
Query
Classic
Default
Remarks
Example
(enhanced)
Example
(classic)
Example
(classic)
Errors
See Also
RATEn
Purpose
Query
Classic
Optional Suffix
Remarks
Example
(enhanced)
Example
(classic)
See Also
READRATEn
Purpose
Command
Query
Classic
Optional Suffix
Arguments
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(classic)
Errors
See Also
Change the active range to the default range of the Hi or Lo. Replies the active range full
scale, pressure unit and measurement mode.
“RANGE Rng”
“RANGE?”
“RANGE= Rng”
“RANGE ”
“RANGE IH”
“IH” for the Hi Q-RPT
Rng:
“IL” for the Lo Q-RPT
The active Q-RPT must be selected before making changes to settings that are dependent on the
range. Q-RPTs selected with this command are used with their full default pressure range. The reply
indicates the active range in psi if the RPM4 is a “US” version or in kPa if the RPM4 is an “SI” version.
Used as a simple query, the active range is returned, which can be an AutoRanged range or a
default range (see “ARANGE” cmd).
Cmd sent:
“RANGE? IL”
(select internal Lo Q-RPT in it’s full default range)
Query reply:
“2.2 psi g,IL”
Sent:
“RANGE= IH”
(select internal Hi Q-RPT in it’s full default range)
Reply:
“1000 psi a, IH”
Sent:
“RANGE”
(request current range)
Reply:
“220 psi a,IL”
ERR# 6:
Invalid Rng argument.
ERR# 29:
The selected Q-RPT is not available.
“ARANGE”, “RPT”
3.2.3, 3.3.1, 3.3.4
Read the next available pressure rate of change.
“RATEn?”
“RATEn”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
The next available pressure rate of change in the current pressure unit per second is returned.
After receiving this program message, the RPM4 replies back with the data once a new pressure
measurement cycle is complete. This can take up to the current read rate period (1.2 seconds
by default).
Query sent:
“RATE?”
Query reply:
“0.01 kPa/s”
Sent:
“RATE2”
Reply:
“0.03 kPa/s”
“PRR”, “QPRR”.”READRATE”
3.3.6.2
Read or set the specified or active Q-RPT read rate or auto read rate mode.
“READRATEn period”
“READRATEn?”
“READRATEn= period”
“READRATEn”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
Period to integrate the measurement over (ms). Can be from 200 ms to 20000
“period ":
ms. Set to ‘0’ to enable automatic read rate.
The RPM4 can have the speed in which it integrates each measurement (“read rate”) automatically
adjusted based on the rate, or it can manually set to a fixed period. Increasing the read rate increases
the reply time for pressure and rate queries. In differential mode and when using the HL Q-RPT, the
Lo Q-RPT read rate is always set to the same read rate as the Hi.
Cmd sent:
“READRATE 1000”
Query reply:
“1000”
(No reply if GPIB-488)
Cmd sent:
“READRATE? 1000”
Query reply:
“1000”
Sent:
“READRATE=1000”
Reply:
“1000”
ERR# 6:
The “period” argument is out of range.
ERR#10:
The suffix ‘n’ is invalid
“PR”, “PRR”, “SR”
3.5.7.2
© 2007 DH Instruments, a Fluke Company
Page 90
4. REMOTE OPERATION
READYCKn
Purpose
Command
Query
Classic
Optional Suffix
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(enhanced)
Example
(classic)
Example
(classic)
Errors
See Also
REMOTE
Purpose
Command
Classic
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(classic)
See Also
RESn
Purpose
Command
Query
Classic
Default
Optional Suffix
Arguments
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(classic)
Errors
See Also
Read or set the Ready check flag.
“READYCKn 1”
“READYCKn?”
“READYCKn=1”
“READYCKn”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
The internal ready check flag is cleared whenever the specified or active Q-RPT reaches a
Not Ready (NR) condition. The “READYCK” query returns the status of the flag. The flag is
set by sending the “READYCK 1” program message while the Q-RPT is in a Ready condition.
The “READYCK” program message query can then be used at a later time to determine
whether a Not Ready condition has occurred since the ready check flag was set.
Cmd sent:
“READYCK1 1”
Query reply:
“1” (no reply if GPIB-488)
Cmd sent:
“READYCK1?”
Query reply:
“1”
Cmd sent:
“READYCK?”
Query reply:
“1” (if Q-RPT condition has stayed Ready)
“0” (if Q-RPT condition has NOT stayed Ready)
Sent:
“READYCK=1”
Query reply:
“READYCK=1”
Sent:
“READYCK”
Query reply:
“READYCK=1” (if Q-RPT condition has stayed Ready)
“READYCK=0” (if Q-RPT condition has NOT stayed Ready)
ERR# 6:
Argument is not a ‘0’ or a ‘1’.
“SR”
3.2.1
Lock out the front panel keypads during remote operation.
“REMOTE”
“REMOTE”
The RPM4 goes into remote mode whenever communications take place. The user can
return to local operation by pressing the [ESC] key. The REMOTE program message locks
out the front panel completely. The only way to unlock the front panel after the “REMOTE”
command is using the “LOCAL” program message, the IEEE-488 “GTL” command, or by
cycling the RPM4 power.
Cmd sent:
“REMOTE”
Reply:
“REMOTE” (no reply if IEEE-488)
Cmd sent:
“REMOTE?”
Reply:
“REMOTE”
Sent:
“REMOTE”
Reply:
“REMOTE”
“LOCAL”
To read or set the pressure display resolution for the active range.
“RESn res”
“RESn”
“RESn= res”
“RESn”
“RESn=0.001”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
The pressure display resolution in % span of the specified Q-RPT range (0.0001 to 1 %
FS).
The pressure display resolution is defined as % span of the active range. The setting is
separate for each range, and changes as the range is changed.
Cmd sent:
“RES .01”
Query reply:
“0.01” (No reply if GPIB-488)
Cmd sent:
“RES? .01”
Query reply:
“0.01”
Sent:
“RES=.01”
Reply:
“0.01”
ERR# 6
The argument is invalid.
3.4.2
res:
Page 91
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
RESET
Purpose
Command
Classic
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(classic)
See Also
RPTn
Purpose
Query
Classic
Optional Suffix
Remarks
Example
(enhanced)
Example
(classic)
Errors
See Also
SCRSAV
Purpose
Command
Query
Classic
Arguments
Default
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(classic)
Errors
See Also
Reset the user’s settings to factory defaults. Corresponds to front panel “Reset – Sets”.
“RESET”
“RESET”
The RPM4 has user settings (units, resolution, etc.) that can be reset to factory defaults. The
remote “RESET” program message corresponds to the front panel “Reset - Sets”. System
calibration coefficients and communications settings are not affected. The reset cycle takes up
to 3 seconds to complete. Remote communications should not take place during this period.
Cmd sent:
“RESET”
Reply:
“RESET”
(no reply if IEEE-488)
Cmd sent:
“RESET?”
Reply:
“RESET”
Sent:
“RESET”
Reply:
“RESET”
3.5.9.1, 3.5.9
Read the available Q-RPT identification data.
“RPTn”
“RPTn”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
Up to two internal Q-RPTs can be available for use in an RPM4. You can query the RPM4 for
information about each particular Q-RPT. The Q-RPT data is returned in the following format:
RPTLabel, Q-RPTLocator, Serial#, RngGa, RngAbs, Q-RPTMode
RngLabel:
RPT type label. This label identifies the Q-RPT type and range. This is
the same label used on the RPM4 front panel screen.
RptLocator:
Text field identifying the Q-RPT position in the RPM4 system.
“IH” identifies this as an internal, Hi Q-RPT
“IL” identifies this as an internal, Lo Q-RPT
Serial#:
The serial number of the Q-RPT.
RngGa:
The Q-RPT default gauge mode range in the current pressure unit.
RngAbs:
The Q-RPT default absolute mode range in the current pressure unit.
“NONE” appears in the field if the Q-RPT is a Gxxx, BGxxx or Axxx with
absolute and negative gauge modes OFF.
RptMode:
‘A’ if Q-RPT is Axxx and supports absolute, gauge and negative gauge
measurement modes.
‘G’ if Q-RPT is gauge Gxxx or Axxx with absolute and negative gauge
modes OFF and supports only gauge measurement mode.
‘N’ if Q-RPT is BGxxx and supports gauge and negative gauge
measurement modes.
Cmd sent:
“RPT2?”
(Get information on the Lo Q-RPT)
Query reply:
“A350K, IL, 82345, 35, 50,A”
Cmd sent:
“RPT3”
(Get information on the HL Q-RPT)
Query reply:
“A7M, HL, 82345, 1000, 1000,A”
ERR#4:
External device not detected.
ERR# 10:
Invalid suffix.
3.2.3
Read or set the front panel display screen saver activation time.
“SCRSAV n”
“SCRSAV?”
“SCRSAV=n”
“SCRSAV”
The inactivity period (0 – 99 minutes) after which screen saver activates.
n:
“SCRSAV 10”
The RPM4 front panel will dim after a period of keyboard and remote inactivity. Setting this
value to ‘0’ disables this feature.
Cmd sent:
“SCRSAV 30”
Query reply:
“30”
(No reply if GPIB-488)
Cmd sent:
“SCRSAV? 30”
Query reply:
“30”
Sent:
“SCRSAV=30”
Reply:
“30”
ERR# 6
The argument was invalid.
3.5.5.1
© 2007 DH Instruments, a Fluke Company
Page 92
4. REMOTE OPERATION
SN
Purpose
Query
Classic
Remarks
Example
(enhanced)
Example
(classic)
See Also
SR
Purpose
Query
Classic
Optional Suffix
Remarks
Example
(enhanced)
Example
(classic)
See Also
SS%n
Purpose
Command
Query
Classic
Optional Suffix
Arguments
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(classic)
Errors
See Also
To read the serial number of the RPM4.
“SN?”
“SN”
The RPM4 is serialized. The serial number can be read using this program message.
Query sent:
“SN?”
Query reply:
“321”
Sent:
“SN”
Reply:
“321”
3.5.5.4
Read the next available Ready/Not Ready status.
“SR?”
“SR”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
The current Ready status can be read using this program message.
Possible replies:
“NR”
The pressure is not ready within the limits defined by the stability criterion.
“R ”
The pressure meets the ready criteria. The status is replied when the next
pressure measurement is finished.
“UL”
The pressure of one of the active Q-RPTs has exceeded the user defined upper or
lower limits.
“OP”
The pressure of one of the Q-RPTs has exceeded the Q-RPT’s maximum limits.
“ER”
An internal device failure has occurred.
Query sent:
“SR?”
Query reply:
“NR”
Sent:
“SR”
Reply:
“NR”
“PR”, “PRR”, “HS”, “SS”, “UL”, “LL”
3.2.1, 3.4.4, 3.4.4.1
Read or set the current stability limit as a % of range.
“SS% limit”
“SS%?”
“SS%=limit”
“SS%”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
The stability limit in %FS of the current active range.
limit:
The stability limit can be read and set as a percent of the full scale range of the Q-RPT range.
Cmd sent:
“SS% .1”
Query reply:
“0.10 %”(No reply from GPIB-488)
Cmd sent:
“SS%? .1”
Query reply:
“0.10 %”
Sent:
“SS%=.1”
Reply:
“0.10 %”
ERR# 6:
The argument was invalid.
ERR# 10:
Invalid or missing command suffix.
“SS”
3.4.3
Page 93
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
SSn
Purpose
Command
Query
Classic
Optional Suffix
Arguments
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(classic)
Errors
See Also
TIME
Purpose
Command
Query
Classic
Arguments
Example
(enhanced)
Example
(enhanced)
Example
(classic)
Errors
See Also
UCOEFn
Purpose
Query
Classic
Optional Suffix
Remarks
Example
(enhanced)
Example
(classic)
See Also
Read or set the current pressure stability limit.
“SS limit”
“SS?”
“SS=limit”
“SS”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
The stability limit in the current pressure unit of measure.
Limit:
The stability limit can be read and set as a pressure. The stability limit is used as the
Ready/Not Ready criteria..
Cmd sent:
“SS .1”
Query reply:
“0.10 kPa/s”
(No reply from GPIB-488)
Cmd sent:
“SS? .1”
Query reply:
“0.10 kPa/s”
Sent:
“SS=.1”
Reply:
“0.10 kPa/s”
ERR# 6:
The argument was invalid.
ERR# 10:
Invalid or missing command suffix.
“SS%”
3.4.3
Read or set the RPM4 internal clock.
“TIME hh:mmXX”
“TIME?”
“TIME=hh:mmXX”
“TIME”
The time in a 12 hour format using a colon delimiter
hh:mm:
”am” or “pm”
XX:
Cmd sent:
“TIME 12:52PM”
Query reply:
“12:52pm”
(No reply if GPIB-488)
Cmd sent:
“TIME? 12:52PM”
Query reply:
“12:52pm”
Sent:
“TIME=12:52PM”
Reply:
“12:52pm”
ERR# 7:
Missing or improper program message argument(s).
“DATE”
3.5.5.3
To identify the coefficient used to convert 1 Pascal to the current pressure unit of measure.
“UCOEFn?”
“UCOEFn”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
The RPM4 handles all pressure values internally in Pascal. The coefficient replied is
equivalent of 1 Pa in the current pressure unit of measure. This program message allows the
user to convert pressures
Query sent:
“UCOEF?”
Query reply:
“0.0010000000”
Sent:
“UCOEF”
Reply:
“0.0010000000”
3.3.2, 3.5.6, 7.1.1
© 2007 DH Instruments, a Fluke Company
Page 94
4. REMOTE OPERATION
UDU
Purpose
Command
Query
Classic
Default
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(enhanced)
Errors
See Also
Uln
Purpose
Command
Query
Classic
Optional Suffix
Arguments
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(classic)
Errors
See Also
Read or set the user defined pressure unit.
“UDU label, ucoef”
“UDU?”
“UDU=label, ucoef”
“UDU”
User unit label (4 alphanumeric char maximum). It cannot be an already
label:
supported unit label.
Ucoef:
“User unit conversion coefficient (units/Pa).
“UDU USER,1.0”
The user defined unit must be set up with the program message prior to remote or local
selection.
Cmd Sent:
“UDU MYUN, .001”
Query reply:
“MYUN, 0.001000”
(No reply if GPIB-488)
Cmd Sent:
“UDU? MYUN, .001”
Query reply:
“MYUN, 0.001000”
Sent:
“UDU=MYUN, .001”
Reply:
“MYUN, 0.001000”
3.5.6, 3.3.2
Read or set an upper limit for the specified or active Q-RPT.
“Uln limit”
“Uln?”
“Uln=limit”
“ULn”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
The upper limit pressure in the specified Q-RPT’s current pressure unit and
“limit":
measurement mode. If the unit is meters, this value is be interpreted in kPa. If
the unit is feet, this value is be interpreted in psi.
The RPM4 has an upper limit for each range and for each measurement mode (gauge, absolute). If
the pressure does exceed the upper limit, the pressure display flashes. This feature should
always be used to prevent accidental over pressure of a device under test.
Cmd sent:
“UL 1000”
Query reply:
“1000.00 kPa a” (No reply if GPIB-488)
Cmd sent:
“UL? 1000”
Query reply:
“1000.00 kPa a”
Sent:
“UL=1000”
Reply:
“1000.00 kPa a”
ERR# 6:
The “limit” argument is out of range.
3.4.4
Page 95
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
UNITn
Purpose
Command
Query
Classic
Optional Suffix
Arguments
Remarks
Example
(enhanced)
Example
(enhanced)
Example
(classic)
Errors
See Also
VER
Purpose
Query
Classic
Remarks
Example
(enhanced)
Example
(classic)
See Also
Read or set the pressure unit of measure unit and measurement mode.
“UNITn unit (, ref”)”
“UNITn unitn (, ref”)”
“UNITn unitg (, ref”)”
“UNITn unita (, ref”)”
“UNITn unitd (, ref”)”
“UNITn?”
“UNITn=unit (, ref”)”
“UNITn=unitn (, ref”)”
“UNITn=unitg (, ref”)”
“UNITn=unita (, ref”)”
“UNITn=unitd (,ref”)”
“UNITn”
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
The text corresponding to the pressure unit of measure. A unit mode
character can optionally be added to the end of the units:
‘a’ for absolute measurement mode.
ref:
‘g’ for gauge measurement mode.
The optional unit reference temperature only if the unit is “InWa”
This program message determines what unit of measure and what measurement mode is used to
display pressure values. Refer to Table 7 for a detailed list of the units available and their labels.
If the unit text is not followed by an explicit mode character (‘a’, ‘g’) then “gauge” mode is assumed.
There can be a space between the unit text and the ‘a’ or ‘g’.
If the unit specified is “InWa”, an optional second argument “ref” can be set. The “ref” can be 4, 20,
or 60 corresponding to InWa at 4 °C, 20 °C or 60 °F. If this second argument is not given when the
unit is “InWa”, then the reference temperature is assumed to be 20 °C. This can also be added
directly onto the end of the Unit argument if desired.
The fifth character of the reply is always ‘a’ for absolute mode or ‘g’ for gauge/negative gauge
mode. White spaces precede this character if needed. The temperature reference is added to the
reply only if the unit is “InWa”.
The reply includes the measurement mode character in the fifth position, with an ‘a’ indicating
absolute mode or a ‘g’ indicating gauge.
The “MODE” command can also be used to set the desired measurement mode only.
“UNIT? kPaa”
Cmd sent:
“kPaa”
Query reply:
“UNIT? InWag, 4”
Sent:
“inWag, 4”
Query reply:
“UNIT? InWaa60”
Sent:
“inWaa, 60”
Query reply:
Cmd sent:
“UNIT psi n”
Query reply:
“psi g”
(‘g’ used to indicate both gauge & neg gauge modes)
“UNIT=kPaa”
Sent:
“kPaa”
Reply:
“UNIT=InWag, 4”
Sent:
“inWag, 4”
Reply:
The unit is invalid.
ERR# 7:
The ref is invalid.
ERR# 6:
Absolute measurement mode and altitude units are not allowed with a gauge Q-RPT.
ERR# 20:
“MMODE”, “MODE”
3.3.2, 3.3.3, 3.5.6, 7.1.1
Unit:
Identify the RPM4, US or SI units, the Q-RPT labels and the software version.
“VER?”
“VER”
The software version of the RPM4 can be read. This is useful for checking for the presence of the
RPM4 and for reference purposes. It indicates the internal Q-RPT(s) and software version.
Query sent:
“VER?”
Query reply:
“DH INSTRUMENTS, INC RPM4 us A350K/BG15K Ver1.00 ”
Query sent:
“VER?”
Query reply:
“DH INSTRUMENTS, INC RPM4 us A350K/BG15K Ver1.00 ”
“ID”, “*IDN?”
None
© 2007 DH Instruments, a Fluke Company
Page 96
4. REMOTE OPERATION
ZOFFSETn
Purpose
Command
Query
Classic
Defaults
Optional Suffix
Arguments
Remarks
Example
(enhanced)
Example
(classic)
Errors
See Also
4.5
Read or set the AutoZ pressure offset (Poffset) for the specified or active Q-RPT in the current
measurement mode.
“ZOFFSETn GaOffset , AbsOffset , DifOffset”
“ZOFFSETn?”
“ZOFFSETn =GaOffset , AbsOffset , DifOffset”
“ZOFFSETn”
“ZOFFSETn = 0.0, 0.0, 0.0”
(Gauge Q-RPT)
“ZOFFSETn = 101325, 0.0, 0.0”
(Absolute Q-RPT)
The active Q-RPT is assumed if no suffix is given.
“n”
‘1’ or “:HI” Specify the Hi Q-RPT
‘2’ or “:LO” Specify the Lo Q-RPT
The Q-RPT pressure offset (“Poffset”) for Gauge measurement mode (Pa).
GaOffset:
The Q-RPT pressure offset for absolute measurement mode (Pa)
AbsOffset:
The pressure offset (Poffset) for the specified Q-RPT (Hi or Lo) can be accessed with this
program message. There are separate offsets for gauge and absolute modes.
Using this program message overwrites the current offset, so caution must be used.
Changes made using this program message take effect immediately.
Cmd sent:
“ZOFFSET1 2.1, 0, 0”
Query reply:
“ 2.10 Pa, 0.00 Pa, 0.00 Pa”
Sent:
“ZOFFSET=97293.1, 3.02, 0”
Reply:
“ 97293.10, 3.02, 0.00”
ERR# 6:
One of the arguments is out of range.
3.5.1
STATUS REPORTING SYSTEM
The RPM4 status reporting system is used to track and report system status and errors. It follows the
model of the IEEE Std 488.2 and works for the COM1 and the IEEE-488 port with slight differences. The
RPM4 can be programmed to respond to various status conditions by asserting the SRQ of the IEEE-488
interface. The COM1 port cannot be supported in such a way, so polling must be used.
4.5.1
ERROR QUEUE
The RPM4 keeps track of remote errors by using an error queue. If an error occurs, it is pushed
onto the Error Queue. If you are using the COM1 port, the error number is immediately
replied in the form “ERR#nn where nn is the error code from 0 to 99. The “ERR?” (or “ERR”)
query can then be used to pull the error from the Error Queue in it’s descriptive text format.
If you are using the enhanced program message format, the Error Queue will accumulate
errors until full unless they are pulled from the queue. If you are using the classic program
format, the Error Queue is cleared every time a new program message is received.
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
4.5.2
STATUS BYTE REGISTER
The RPM4 contains an 8 bit Status Byte Register that reflects the general status of the RPM4.
Table 16. 8 Bit status byte register
OPER
(128)
RQS/MSS
(64)
ESB
(32)
MAV
(16)
N/A
(8)
ERROR
(4)
N/A
(2)
RSR
(1)
This register is affected by the RPM4 reply output queue, the Error Queue, the Standard
Event Status register and the Ready Event Status register.
Status Byte Register
(“∗STB?” or ”∗SRE n”)
OPER
(128)
RQS/MSS
(64)
Standard Event Status Register
(“∗ESR?” or “∗ESE n”)
URQ
CMD
EXE
DDE
QYE
(64)
(32)
(16)
(8)
(4)
ESB
(32)
←←←
MAV
(16)
N/A
(8)
ERROR
(4)
N/A
(2)
RSR
(1)
←←←
OUTPUT
QUEUE
←←←
ERROR
QUEUE
←←←
PON
(128)
N/A
(128)
MEAS
HI
(64)
Ready Event Status Register
(“RSR?” or ” RSE n”)
NDRY
RDY
N/A
HI
LO
(8)
(32)
(16)
MEAS
HI
(4)
RQC
(2)
OPC
(1)
NRDY
HI
(2)
RDY
HI
(1)
Figure 11. Status register schematic
The Status Byte Register can be read using the “*STB?” query, or by performing a serial poll
on the IEEE-488 bus. If you read this using a serial poll then Bit 6 is the RQS. If the
“*STB?” query is used, then bit 6 is the MSS bit. All of the other bits are common to both
types of query.
Each of these status bits can cause a SRQ to occur. The Service Request Enable Register
(“*SRE” program message ) determines which of these flags are able to assert the SRQ line.
This enable register has a matching set of bits that each will enable the designated bit to
cause a SRQ, except for the RQS/MSS bit(s) which cannot cause a SRQ. If you set this
register to 20 ($14 hex), an SRQ will occur if the MAV or the ERROR bit are set. The
description of these bits are given as:
OPER
RQS
MSS
ESB
N/A Bit 7 (128)
Requested Service Bit 6 (64)
Indicates that the SRQ line of the IEEE-488 interface has been asserted by the
RPM4. This bit is cleared when a serial poll is performed on the RPM4, and is a
part of the Status Byte Register when read using a serial poll. This bit does not
apply if the COM1 port is being used.
Master Summary Status Bit 6 (64)
Indicates that an event or events occurred that caused the RPM4 to request service
from the Host, much like the RQS bit. Unlike the RQS bit, it is READ ONLY and can
be only cleared when the event(s) that caused the service request are cleared.
Event Summary Bit 5 (32)
Indicates if an enabled bit in the Standard Event Status Register became set
(see Section 4.5.3).
© 2007 DH Instruments, a Fluke Company
Page 98
4. REMOTE OPERATION
MAV
ERROR
RSR
4.5.3
Message Available Bit 4 (16)
Indicates that at least one reply message is waiting in the RPM4 IEEE-488 output
queue.
Error Queue Not Empty Bit 2 (4)
Indicates that at least one command error message is waiting in the RPM4 IEEE-488
error message queue. Use the “ERR?” query to get this message.
Ready Summary Bit 0 (1)
Indicates that an enabled bit in the Ready Status Register became set.
STANDARD EVENT REGISTER
The RPM4 contains an 8 bit Standard event register that reflects specific RPM4 events.
Enabled events in this register will set or clear the ESB bit of the Status Byte Register.
Table 17. 8 bit standard event register
PON
URQ
CMD
EXE
DDE
QYE
RQC
OPC
(128)
(64)
(32)
(16)
(8)
(4)
(2)
(1)
This register can be read using the “*ESR?” query, Each of these status bits can set the ESB
bit of the Status Byte Register, causing a SRQ to occur IF the ESB bit is enabled to do so.
The Standard Event Status Enable Register (“*ESE” program message ) determines which of
these flags are able to assert the ESB bit. The description of these bits are given as:
PON
Power On Bit 7 (128)
Indicates that the RPM4 power has been cycled since the last time this bit was
read or cleared.
URQ
User Request Bit 6 (64)
Indicates that the RPM4 was set to local operation manually from the front panel
by the user (pressing the [ESC] key).
CMD
Command Error Bit 5 (32)
Indicates that a remote command error has occurred. A command error is
typically a syntax error in the use of a correct program message.
EXE
Execution Error Bit 4 (16)
Indicates if a remote program message cannot be processed due to device
related condition.
DDE
Device Dependent Error Bit 3 (8)
Indicates that an internal error has occurred in the RPM4 such as a transducer timeout.
QYE
Query Error Bit 2 (4)
Indicates that an error has occurred in the protocol for program message
communications. This is typically caused by a program message being sent to
the RPM4 without reading a waiting reply.
RQC
Request Control Bit 1 (2)
This bit is not supported as the RPM4 cannot become the active controller in charge.
OPC
Operation Complete Bit 0 (1)
Indicates that the RPM4 has completed all requested functions.
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© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
4.5.4
READY STATUS REGISTER
The RPM4 contains an 8 bit Ready Status Register that reflects specific RPM4 Q-RPT
measurement ready events. Enabled events in this register will set or clear the RSB bit of the
Status Byte Register.
Table 18. 8 bit ready status register
N/A
(128)
MEAS
LO
NRDY
LO
RDY
LO
(64)
(32)
(16)
N/A
(8)
MEAS
HI
NRDY
HI
RDY
HI
(4)
(2)
(1)
This register can be read using the “*RSR?” query, Each of these status bits can set the
RSB bit of the Status Byte Register, causing a SRQ to occur IF the RSB bit is enabled to do so.
The Standard Event Status Enable Register (“*RSE” program message ) determines which
of these flags are able to assert the RSB bit. The description of these bits are given as:
MEAS LO Lo-RPT measurement ready Bit 6 (64)
Indicates that the Hi Q-RPT has completed a Q-RPT measurement.
NRDY LO Lo Q-RPT pressure Not Ready Bit 5 (32)
Indicates that the Hi Q-RPT made a transition from Ready to Not Ready as
defined by the stability settings (see Section 3.2.1).
RDY LO
Lo Q-RPT pressure Ready Bit 4 (16)
Indicates that the Hi Q-RPT is Ready as defined by the stability settings (see
Section 3.2.1).
MEAS HI
Hi Q-RPT measurement ready Bit 2 (4)
Indicates that the Hi Q-RPT has completed a Q-RPT measurement.
NRDY HI
Hi Q-RPT pressure Not Ready Bit 1 (2)
Indicates that the Hi Q-RPT made a transition from Ready to Not Ready as
defined by the stability settings (see Section 3.2.1).
RDY HI
Hi Q-RPT pressure Ready Bit 0 (1)
Indicates that the Hi Q-RPT is Ready as defined by the stability settings (see
Section 3.2.1).
© 2007 DH Instruments, a Fluke Company
Page 100
4. REMOTE OPERATION
4.6
IEEE STD. 488.2 COMMON AND STATUS PROGRAM
MESSAGES
The RPM4 supports a set of commands that are common to all instruments conforming to IEEE Std. 488.2.
These command make it easy to perform basic function for any device that supports these commands.
These commands also cover the status reporting commands. See Section 4.5 for details on the status
registers mentioned in these commands.
Table 19. Program message list
∗CLS
Clear all of the status & event structures.
∗ESE
Read or set the Standard Event Status Enable Register.
∗ESR
Read the Standard Event Status Register.
∗IDN
Identify the RPM4 version, range, and serial number.
∗OPC
Set the operation complete bit when all operations have completed.
∗OPT
Read the list of installed RPM4 options.
∗RST
Reset the RPM4 settings to factory settings.
∗TST
Read the power on self test status.
∗SRE
Read or set the Service Request Enable Register.
∗STB
Read the Status Byte Register.
∗RSE
Read or set the Ready Status Enable Register.
∗RSR
Read the Ready Status Register.
4.6.1
∗CLS
Purpose
Command
Remarks
Example
∗ESE
Purpose
Command
Query
Default
Arguments
Remarks
Example
(enhanced)
Errors
∗ESR
Purpose
Command
Remarks
Example
(enhanced)
PROGRAM MESSAGE DESCRIPTIONS
Clear all of the status & event structures.
“∗CLS”
This program message clears the following events and status registers:
Standard Byte Register (STB)
Standard Event Status Register (ESR)
Error Queue
Pending OPC operations
Sent:
“∗CLS”
Reply:
none
Read or set the Standard Event Status Enable Register.
“∗ESE n”
“∗ESE?”
“∗ESE 0”
’0 to 255’ This is the decimal representation of the bit(s) to enable. To enable
n:
the PON and QYE bits, the argument would be 128 + 4 = 132.
The Standard Event Status Enable register determines which bits in the standard Event
Status Register are enabled and included in the Status Byte Register (ESB bit), and can
assert the SRQ line. The reply is in decimal numeric form.
Sent:
“∗ESE=128”(enables the PON bit)
Query reply:
“128” (no reply if IEEE-488)
ERR# 6:
n is not valid.
Read the Standard Event Register.
“∗ESR?”
The Standard Event Register contents are cleared after reading. The reply is in decimal
numeric form.
Sent:
“∗ESR?”
Reply:
“20” (the QYE and EXE bits are set)
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
∗IDN
Purpose
Query
Remarks
Example
(enhanced)
∗OPC
Purpose
Command
Query
Remarks
Example
(enhanced)
∗OPT
Purpose
Query
Remarks
Example
(enhanced)
∗RST
Purpose
Command
Remarks
Example
(enhanced)
See Also
∗SRE
Purpose
Command
Query
Default
Arguments
Remarks
Example
(enhanced)
Errors
∗STB
Purpose
Command
Remarks
Example
(enhanced)
∗TST
Purpose
Query
Remarks
Example
(enhanced)
Identify the RPM4 version, range, and serial number.
“∗IDN?”
The identification reply is made up of the manufacture, the model, the serial number and the
software version. Each is separated by a comma.
Sent:“∗IDN?”
Reply:“DH INSTRUMENTS INC, RPM4 A0100/A0015, 1234, Ver2.00 -dhf”
Sets the operation complete bit when all operations have completed.
“∗OPC”
“∗OPC?”
This Command enables the RPM4 to set the OPC bit in the Standard Event Status Register
when it has completed all pending functions.
The Query replies with a “1” when all functions are complete.
Sent:
“∗OPC”
Query reply:
“1”
Reads the list of installed RPM4 options.
“∗OPT?”
This Query returns any registered option(s) installed in the RPM4. Each option is separated
by a comma. Possible options:
“IEEE-488:0”
The IEEE-488 option is installed,
Sent:
Reply:
“∗OPT?”
“IEEE-488:0”
Resets the RPM4 settings to factory settings.
“∗RST””
This Command sets the RPM4 settings to factory settings. This equivalent to a front panel
executed RESET/SET. This does not affect the communications settings.
Sent:
“∗RST”
Reply:
“∗RST” (no reply if IEEE-488)
Section 3.5.9.1, Reset – Sets
Read or set the Service Request Enable Register.
“∗SRE n”
“∗SRE?”
“∗SRE 0”
’0 to 255’ This is the decimal representation of the bit(s) to enable. To allow the
n:
MAV and ESB bits to assert the SRQ line, the argument would be 32 + 16 = 48.
Bit 6 (64) is reserved and cannot be set.
The Service Request Enable Register determines which bits of the Status Byte can set the MSS
bit of the Status Byte and request service by asserting the SRQ line of the IEEE-488 interface.
Sent:
“∗SRE=48” (enables the MAV and ESB bits)
Query reply:
“48” (no reply if IEEE-488)
ERR# 6:
n is not valid.
Read the Status Byte Register.
“∗STB?”
The Status Byte Register reflects the general status of the RPM4. The ‘MSS’ bit state is
represented by bit 6.
Sent:
“∗STB?”
Reply:
“80” (The MSS and MAV bits are set)
Read the power on self test status.
“∗TST?””
The RPM4 system memory stores the user settings (units, resolution) and retains them when
the unit if OFF. On power-up, this memory is checked. If this memory is corrupted, all user
settings are reset to default (as if the “∗RST” program message was executed), and the ∗TST
query will return a non zero value. If the RPM4 passed the test on power-up OR if the ∗TST
query was used at least once since the RPM4 was powered up the reply will be a ‘0’.
Sent:
“∗RST?”
Reply:
“1”
© 2007 DH Instruments, a Fluke Company
Page 102
4. REMOTE OPERATION
*RSE
Purpose
Command
Query
Default
Arguments
Remarks
Example
(enhanced)
Errors
*RSR
Purpose
Command
Remarks
Example
(enhanced)
Read or set the Ready Status Enable Register.
“RSE n”
“RSE?”
“RSE 0”
’0 to 255’ This is the decimal representation of the bit(s) to enable. To enable
the RDY bit, the argument would be 1.
The Ready Status Enable Register determines which bits in the Ready Status Register are
enabled and included in the Status Byte Register (RSR bit), and can assert the SRQ line.
The reply is in decimal numeric form.
Sent:
“∗RSE=1” (enables the RDY bit)
Query reply:
“1” (no reply if IEEE-488)
ERR# 6:
n is not valid.
n:
Read the Ready Status Register.
“RSR?”
The Ready Status Register contents are cleared after reading.
numeric form.
Sent:
“RSR?”
Reply:
“6” (The MEAS and NRDY)
Page 103
The reply is in decimal
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
NOTES
© 2007 DH Instruments, a Fluke Company
Page 104
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS
5.
MAINTENANCE,
ADJUSTMENTS A N D
CALIBRATION
5.1
OVERVIEW
RPM4 A70M/A20M-AF was designed for maintenance free operation. No maintenance is required other than:
•
Regular AutoZeroing of quartz reference pressure transducers (Q-RPTs) (see Section 3.5.1).
•
Periodic calibration of Q-RPTs (see Section 5.3).
•
Adjustment of the on-board barometer (see Sections 5.2.2).
From a maintenance, calibration and repair point of view, the RPM4 and HPMS are treated as separate
sub-systems.
RPM4/HPMS A70M/A20M-AF is a sophisticated pressure measuring instrument with advanced onboard features and functions. Before assuming that unexpected behavior is caused by a system defect or
failure, use this manual and other training facilities to become thoroughly familiar with RPM4 operation.
For rapid assistance in specific situations see Chapter 6 for troubleshooting information.
RPM4 is covered by a limited one (1) year warranty. Unauthorized service or repair during the warranty
period is undertaken at the owner’s risk and may cause damage that is not covered under warranty and/or may
void the warranty. For warranty service, contact a DHI Authorized Service Provide (see Table 23).
5.2
RPM4 MAINTENANCE
5.2.1
AUTOZERO OF Q-RPTS
See Section 3.5.1 for complete information on Autozeroing of RPTs.
5.2.1.1
GAUGE MODE AUTOZERO
Since gauge mode AutoZeroing is so easily performed, it is good practice to
AutoZero whenever the RPM4 is vented (open to atmosphere). Before
AutoZeroing, allow at least two minutes for full system stabilization after venting;
be sure that the pressure applied is truly zero (i.e., the RPT is truly
vented/connected to atmosphere with no back pressure) and be sure to consider
the influence of fluid heads.
To cause the range to Autozero, press [AutoZ].
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
If the RPM4 is used only in gauge mode, Autozeroing in absolute mode is not
necessary and vice-versa.
Gauge and absolute mode Autozeroing are
completely independent one from the other.
See Section 3.5.1 for complete information on Autozeroing of RPTs.
5.2.1.2
ABSOLUTE MODE AUTOZERO
When operated in absolute mode, a Q-RPT should be Autozeroed about once a
month or when the RPM4 has been exposed to a temperature change exceeding
15 ºC (36 ºF). Whether or not AutoZeroing is necessary can also be evaluated by
comparing the reading of the RPM4 Q-RPT to the reading of a barometer when
the RPM4 is vented at atmospheric pressure. The barometer should have
measurement uncertainty of 0.04 psi (0.28 kPa) or better. For the Lo Q-RPT, if
the disagreement is greater than 0.05 psi (0.35 kPa), the Q-RPT should be
rezeroed against the barometer. For the Hi Q-RPT, if the disagreement is
greater than 0.15 psi (1 kPa), it should be rezeroed against the Lo Q-RPT or
against the barometer.
Follow the procedures described in Section 3.3.9.2 to perform absolute mode
Autozeroing.
5.2.2
ADJUSTMENT OF THE ON-BOARD BAROMETER
 PURPOSE
To adjust the output of the on-board barometer (see Section 3.5.7.1).
 PRINCIPLE
The on-board barometer output can be adjusted using PA and PM values following the same
principles as for the Q-RPTs (see Section 5.3.1.1).
Since the on-board barometer is not a source of traceable pressure values, it does not have
to be formally calibrated. It should be offset to agree with a reference barometer. To offset
the barometer, change the barometer pressure adder (PA).
The on-board barometer is used only for measuring changes in atmospheric pressure over
short periods of time (see Section 3.2.3. RPM4 measurement accuracy does NOT depend on the
absolute accuracy of the on-board barometer.
 OPERATION
To view or edit the values of PA and PM for RPM4’s on-board barometer, press [SPECIAL],
<8cal>, <3barometer>. Pressing [ENT] steps through displays of the calibration date
[YYYYMMDD] and PA and PM. In edit mode, the values can be edited. Pressing [ENT]
after the last screen activates the edited values.
To view the current output of the on-board barometer, press [SPECIAL], <7Internal>,
<3baro> from the main run screen.
A pressure standard may be connected to the on-board barometer by connecting to one of
the ATM ports on the RPM4 rear panel Q-RPT modules (10-32 UNF). The operating span of the
barometer is 10 psi (70 kPa) to 16 psi (110 kPa).
© 2007 DH Instruments, a Fluke Company
Page 106
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS
Never apply a pressure greater than 16 psi (110 kPa) to the barometer port. Overpressure
and possible damage may result.
5.3
RPM4 Q-RPT CALIBRATION
5.3.1
PRINCIPLE
RPM4 A70M/A20M-AF has two quartz reference pressure transducers (RPTs) that are the
source of low pressure measurement uncertainty for the system.
To adjust a Q-RPT, pressures from a reference standard are applied to the Q-RPT at
ascending and descending pressure increments over the range. The pressure defined by the
standard and the corresponding Q-RPT readings are recorded at each point. After all of the
pressures have been applied and recorded, adjustments are made to fit the Q-RPT pressure
readings to the standard. Fitting the readings means performing a least squares linear
regression to arrive at the lowest value of the residuals of errors of the Q-RPT relative to the
standard. The Q-RPT output is adjusted by user settable coefficients: PA (an adder or offset)
and PM (a multiplier or span set) (see Section 5.3.1.1).
The calibration process is performed independently on each Q-RPT to arrive at its optimal fit.
RPM4 is delivered with an interactive Q-RPT calibration utility (CalTool for RPTs) that steps
the operator through the complete Q-RPT calibration procedure including applying the
necessary pressures, collecting data automatically, calculating new PA and PM values,
previewing the results of the new calibration and activating the results of the new calibration
(see the CalTool for Q-RPTs manual on the RPM4 A70M/A20M-AF Support Disk). RPM4
also provides complete front panel and remote access to Q-RPT calibration parameters so
that Q-RPT calibrations can be performed without using CalTool software (see Section 5.3.8).
CalTool for RPTs software supports the calibration process of RPM4 Q-RPTs. CalTool and
its documentation are provided on the RPM4 A70M/A20M-AF Support Disk which is delivered with
a new RPM4 A70M/A20M-AF. CalTool for RPTs can also be downloaded from www.dhinstruments.com.
The use of CalTool software to assist in the calibration of RPM4 is highly recommended.
If RPM4 will be used in both gauge and absolute measurement modes, it must be calibrated
in absolute measurement mode, applying absolute pressures. If RPM4 will be used in gauge
measurement mode only, it may be calibrated in gauge mode by applying gauge pressures.
In this case, it will no longer have known measurement uncertainty in absolute mode and
access to absolute mode operation should be turned OFF (see Section 5.3.5).
5.3.1.1
PA AND PM COEFFICIENTS
The coefficients used to adjust Q-RPT readings are designated PA (an adder or
offset) and PM (a multiplier or span set). The coefficients affect the Q-RPT
reading following:
Corrected reading = (uncorrected reading • PM) + PA
PA is expressed in units of pressure (always the SI unit, Pascal).
PM is dimensionless.
Each Q-RPT has its own unique PA and PM values. The PA and PM values
currently in use can be viewed and edited from the front panel in the CAL
function (see Section 5.3.7). PA and PM values are automatically edited when
CalTool software results are activated.
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© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
As editing PA and PM values changes Q-RPT calibration, they should only be
edited by qualified personnel as part of the calibration process. Caution should be
taken to avoid accidental editing and a security system is available to prevent access
(see Section 3.5.5.5). Incorrect editing of PA and PM values can cause out of
tolerance measurements.
A new RPM4 is delivered with PA and PM values set to zero and 1 for all
Q-RPTs. This does not mean that the RPM4 has not been calibrated. In the original
factory calibration, privileged factory coefficients are used for calibration with the
user PA and PM set to zero and 1.
5.3.1.2
AS RECEIVED AND AS LEFT DATA
Frequently, calibration procedures require that as received and as left data be
reported. The necessary information to report as received and as left data on the
calibration of RPM4 Q-RPTs can be obtained in several ways.
When the RPM4 CalTool calibration assistance software is used, as received
data is displayed while running the calibration and is automatically recorded and
reported if desired. As left data is also calculated and presented.
At any time, a) reference pressures applied; b) associated Q-RPT readings;
c) PA, PM and Poffset (AutoZ offset) values, can be used to calculate as received and as
left values. For example, backing out PA and PM on the as left data yields the QRPT readings with PA = 0 and PM = 1. Then applying the as received PA, PM
and Poffset values to the readings calculates as received readings (the readings
that the transducer would have made with the old PA, PM and Poffset).
It is recommended that “as received” values of PA, PM and Poffset be recorded for
each range prior to running the calibration. The current PA, PM and Poffset can be
viewed by pressing [SPECIAL], <8cal>, <1view>. Poffset is only relevant if absolute mode
AutoZero is used in normal operation.
5.3.2
EQUIPMENT REQUIRED
The recommended calibration standard for the RPM4 A70M/A20M-AF Q-RPTs is a DHI
PG7202 piston gauge with a DHI RPM4 A100K reference pressure monitor connected to the
PG7202 as its external barometer. Contact DHI for additional information.
Gas operated piston gauge (deadweight tester), with the following characteristics:
Do not put oil or other liquids into RPM4 A70M/A20M-AF Q-RPTs.
•
Measurement uncertainty of ± 0.005 % of reading or better. A standard with higher
measurement uncertainty may be used but RPM4 measurement uncertainty may be
degraded proportionally from normal specifications.
•
Able to apply absolute pressures. If, after calibration, the RPM4 will be used in
absolute measurement mode, the calibration must be performed using absolute
© 2007 DH Instruments, a Fluke Company
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5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS
pressures. Absolute pressures are be defined by adding atmospheric pressure measured
by a barometer to gauge pressure defined by the piston gauge. If, after calibration, the RPM4
will not be used in absolute measurement mode (as is often the case for higher pressure
Q-RPTs) it may be calibrated in gauge mode using a gauge pressure standard.
Q-RPTs calibrated in gauge measurement mode by applying gauge reference pressure values
should be used in gauge mode only (see Sections 3.3.3,  PRINCIPLE, 5.3.5).
•
Able to supply the recommended sequence of pressure points in the range to be
calibrated: See Section 5.3.4 for information on the recommended calibration point
sequence.
5.3.3
SET-UP AND PREPARATION
To set-up and prepare the RPM4 for calibration of its Q-RPTs:
THE RPM4 SHOULD NOT BE REMOVED FROM THE HPMS BRACKET FOR CALIBRATION. THE
RPM4/HPMS SHOULD ALWAYS BE KEPT TOGETHER AS AN INTEGRATED UNIT UNLESS
DISASSEMBLY IS REQUIRED FOR MAINTENANCE OR REPAIR.
Set the RPM4/HPMS on a stable surface near the calibration standard at a height as
close as possible to the calibration standard’s reference height. Consider the high
pressure gas connection that needs to be made to the TEST port on the rear of the HPMS
and access to the front panel display, keypad and Lo Q-RPT isolation valve.
Connect the calibration standard output to the HPMS rear TEST port. The TEST port
connection is DH500 F (DH500 F: gland and collar type fitting for coned and left hand
threaded 1/4 in. OD tube, equivalent to AE F250C, HIP HF4, etc.). The HPMS TEST port
connects to BOTH of the RPM4 A70M/A20M-AF quartz reference pressure transducers
(see Section 3.2.5).
Take care to avoid overpressure of the Lo Q-RPT (A20M with maximum pressure of 3 000
psi). The HPMS rear TEST port connects to both the A20M (3 000 psi) and the A70M
(10 000 psi) Q-RPTs. Use the Lo RPT Isolation Valve on the HPMS front panel to isolate the Lo
RPT when applying pressure to the Hi RPT (see Section 3.2.5). If RPM4 is removed from the
HPMS, note that the RPM4 has separate Lo and Hi TEST(+) ports, one for each Q-RPT. Exposing
the Lo RPT to pressure greater than 3 600 psi (24 MPa) may damage it beyond repair. The
product warranty does not cover Q-RPT damage due to overpressure.
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
5.3.4
RECOMMENDED CALIBRATION POINT SEQUENCE
Calibration adjustments to RPM4 Q-RPTs are made by altering calibration coefficients,
PA and PM (see Section 5.3.1.1). To adjust these coefficients to optimum values giving the
best results over the Q-RPTs’ complete operating range, the specific calibration point
sequence defined in Table 20 is recommended.
Prior to running the calibration point sequence, the Q-RPT should be exercised:
a) Set full scale pressure.
b) Dwell at full scale pressure for 5 minutes.
c) Return to atmospheric pressure (vented).
d) Dwell for ten (10) minutes.
A dwell time of 60 seconds is recommended before taking data at each pressure increment.
The calibration pressure standard is not required to apply precisely the nominal pressure
value of each calibration point as long as the exact value of the applied pressure is known. Best
results are obtained if the actual applied pressure is within 5 % of the recommended nominal
point.
Table 20. Calibration point sequence for A20M and A70M Q-RPTs
CALIBRATION
SEGMENT
Ascending
Descending
POINT
NO.
1
2
3
4
5
6
7
8
9
POINT
[% OF SPAN]
Atmospheric pressure
25 %
50 %
75 %
100 %
75 %
50 %
25 %
Atmospheric pressure
A Q-RPT that will NOT be used in absolute measurement mode after calibration may be
calibrated in gauge measurement mode with a gauge pressure standard. The Q-RPT should then
be used in gauge mode only (see Sections 3.3.3,  PRINCIPLE, 5.3.5).
5.3.5
TURNING OFF ABSOLUTE MODE CAPABILITY FOR A Q-RPT
 PURPOSE
To prevent operation in absolute measurement mode on a Q-RPT that has been calibrated
for gauge mode only.
 PRINCIPLE
RPM4 A70M/A20M Q-RPTs are frequently used in gauge measurement mode only (see
Section 3.3.3,  PRINCIPLE). Q-RPTs that are used in gauge mode only, may be calibrated
in gauge mode with a reference that applies gauge pressures. Calibration with an absolute
reference is not necessary. However, if a Q-RPT is calibrated in gauge mode, it is not
possible to know if it is in or out of tolerance in absolute modes. To avoid using absolute mode
with a Q-RPT that is calibrated for gauge mode only, access to absolute mode can be turned
OFF. This is accomplished in the [SPECIAL], <8cal> menu.
© 2007 DH Instruments, a Fluke Company
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5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS
 OPERATION
See Section 5.3.7 for more detailed information on editing and viewing Q-RPT calibration
information.
Turning absolute mode operation ON and OFF for a Q-RPT occurs in the same area in which
calibration coefficients are edited. To access the Q-RPT calibration editing area press
[SPECIAL], <8cal> and select the desired Q-RPT. Then select <1edit> to make changes.
[ENT] through the calibration information screens.
After viewing the values of PA and PM the display is:.
Allow absolute
Hi
meas mode: 1off 2on
The cursor is on the number corresponding to the current selection. Make the desired selection.
<1no> causes absolute mode to be unavailable for the Q-RPT.
5.3.6
Q-RPT CALIBRATION USING CALTOOL FOR Q-RPTS SOFTWARE
To calibrate RPM4 Q-RPTs using CalTool software, refer to Sections 5.3.1, 5.3.2, 5.3.3
and 5.3.4 in this manual and then refer to the CalTool for Q-RPTs Software Manual.
CalTool for Q-RPTs software and manual are supplied on the RPM4 A70M/A20M
Support Disk and can be downloaded from www.dhinstruments.com.
5.3.7
EDITING AND VIEWING Q-RPT CALIBRATION INFORMATION
 PURPOSE
View and/or edit Q-RPT calibration information fields including:
•
The calibration date – This field is normally used to record the date on which the Q-RPT is
calibrated.
•
The value of absolute mode AutoZero Poffset – See Section 3.5.1 for complete AutoZero
information. This value is must be set to zero for a Q-RPT that just been calibrated. It
should be set to zero before making adjustments.
•
The value of PA – The pressure adder for the selected Q-RPT (see Section 5.3.1.1).
•
The value of PM – The pressure multiplier for the selected Q-RPT (see Section 5.3.1.1).
•
Absolute measurement mode ON or OFF – See Section 3.3.3,  PRINCIPLE for
complete information on measurement modes. This is set to OFF if a Q-RPT was
calibrated in gauge mode with a gauge pressure standard.
 OPERATION
As editing PA and PM values will change the calibration of the Q-RPTs, the edit function
should only be used by qualified personnel as part of the calibration process. Caution should be
taken to avoid accidental editing. A user level security system is available to control access (see
Section 3.5.5.5).
A new RPM4 is delivered with PA and PM values set to zero and 1 for all ranges. This does not
mean that the RPM4 has not been calibrated. In the original factory calibration, privileged factory
coefficients are used for calibration with the user PA and PM set to zero and 1.
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
To access Q-RPT calibration information viewing or editing press [SPECIAL], <8Cal>.
Select the desired Q-RPT. The <1view> selection displays the calibration information fields.
The <2edit> function displays the fields and allows them to be edited. The display is:
1.
Date of last calibration in YYYYMMDD format.
2.
Position designator of the Q-RPT being viewed.
3.
Current value of absolute mode Poffset.
Cal date:20050425 Hi
AbsPoffset: 2410 Pa
If in edit mode, the calibration information fields can be edited. Edits to Poffset are common
with the AutoZ edit or run function (see Sections 3.3.9, 3.5.1). Pressing [ENT] on the last
field goes to the next view/edit screen:
1.
Value of PA.
2.
Position designator of the Q-RPT being viewed.
3.
Value of PM.
PA: 0.0 Pa
PM: 1.000000
Hi
If in edit mode, the calibration fields can be edited. If the selected Q-RPT is an Axxx Q-RPT,
pressing [ENT] in the PM field goes to the next calibration information display (this display is
skipped if the Q-RPT is a Gxxx or BGxxx type):
1.
Position designator of the Q-RPT being viewed.
2.
Cursor is on current ON or OFF selection.
Allow absolute
Hi
meas mode: 1on 2off
The cursor is on the current setting. If in edit mode, the ON or OFF status can be changed
by selecting <1on> or <2off> (see Section 5.3.5). [ENT] in view mode returns to the view/edit
screen. [ENT] in edit mode goes to confirmation of change activation if changes have been made
in any of the calibration screens. Pressing [ESC] in any edit screen exits the edit screen without
activating any changes.
The value of PA is always in Pascal (Pa). The value of PM is dimensionless.
5.3.8
Q-RPT ADJUSTMENT WITHOUT CALTOOL FOR Q-RPTS
SOFTWARE
 PRINCIPLE
The RPM4 Q-RPTs can be adjusted without using CalTool for Q-RPTs software. This requires:
•
Setting Poffset to zero.
•
Applying pressures with a calibration standard and recording the pressures measured by RPM4.
•
Calculating new PA and PM values and entering them.
© 2007 DH Instruments, a Fluke Company
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5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS
Before proceeding to adjust a Q-RPT without using CalTool for Q-RPTs software, Sections
5.3.1, 5.3.2, 5.3.3 and 5.3.4.
 OPERATION
The typical procedure for adjusting a Q-RPT is:
Set-up and prepare the RPM4 for calibration (see Sections 5.3.2, 5.3.3).
Use the [RANGE] function key to select the Q-RPT to be calibrated (see Section 3.3.1).
Be sure to set the DF range (not an AutoRanged range).
Use [HEAD] to set the HEAD to zero (see Section 3.3.7). Use [UNIT] to set the desired
pressure unit of measure (see Section 3.3.2). Use [MODE] to set the desired pressure
measurement mode (see Section 3.3.3). Q-RPTs that will be used in gauge
measurement mode only after the adjustments are made, may be calibrated in gauge
measurement mode with a gauge pressure standard (see Section 5.3.5).
Use [SPECIAL], <1AutoZ> to access the AutoZ function (see Section 3.5.1). Turn
AutoZ OFF. If you are only verifying the Q-RPT, “as received” prior to adjustments, leave
AutoZ ON.
Use [SPECIAL], <8cal>, <1Hi Q-RPT > or <2Lo Q-RPT >, <1edit>, to read and record the
current values of PA and PM for the Q-RPT to be calibrated. If verifying a calibration in
absolute mode, also record the value of Poffset.
Run the recommended calibration point sequence for the Q-RPT (see Section 5.3.4).
Record the pressure applied by the standard and the RPM4 reading at each calibration point.
Dwell at least 60 seconds at each point after setting the reference pressure to allow full
stabilization.
Enter the calibration pressures and RPM4 readings into a spreadsheet. Calculate the
“non-corrected” RPM4 readings by backing out the PA and PM recorded in Steps and
above, following:
non-corrected reading = (corrected reading - PA)/PM
If calibrating in absolute mode, AutoZ was ON and the value of Poffset was not set to zero,
also add the value of Poffset to each reading.
Perform a linear regression to find the offset and slope that best fit the non-corrected
RPM4 readings to the calibration standard pressures. The offset is the new value of PA,
the slope is the new value of PM.
Press [SPECIAL], <8Cal>, <1Hi Q-RPT > or <2Lo Q-RPT >, <2edit> and write the new
calibration date and the new values of PA and PM for the Q-RPT calibrated (see Section
5.3.7). If the calibration was performed in gauge mode, turn absolute mode OFF so it won’t
be used after the calibration.
Calculate as left data for the calibration if desired following:
as left reading = (non-corrected reading • new PM) + new PA
Perform additional verification pressure runs as desired.
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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
5.4
RPM4 REPAIR
5.4.1
REMOVING RPM4 FROM HPMS
The RPM4/HPMS is an integrated assembly. The RPM4 should not be removed from the HPMS
unless it is necessary for RPM4 and/or HPMS repairs. The RPM4 should be calibrated in the HPMS
mounting system as the RPM4 orientation may affect its calibration.
To remove the RPM4 A20M/A70M-AF from the HPMS High Pressure Mounting System,
proceed as follows (numerical references refer to Figure 12):
n Turn the HPMS upside down. Set it on its top on a flat surface.
o Disconnect the J1 ACC. circular connector from the RPM4 rear panel and remove the RPM4
power cable.
p Remove the Lo Q-RPT connection tube (5): Fully loosen the Lo Q-RPT TEST(+) connection
on the RPM4 rear panel (3). Use a 7/16 in. wrench to loosen the swage nut (3). Do not
remove the NPT thread adapter that is in the Q-RPT TEST(+) port.
Fully loosen the gland nut (6) connecting the Lo Q-RPT connection tube (5) to the Lo Q-RPT
isolation valve rear port (6). Use a 1/2 in. wrench.
Gently pull the Lo Q-RPT connection tube (5) away from the RPM4 rear panel adapter (3)
until the tube tip is free from the adapter in the Lo Q-RPT TEST(+) port.
q Remove the Hi Q-RPT connection tube (9): Fully loosen the Hi Q-RPT TEST(+) connection
on the RPM4 rear panel (2). Use a 7/16 in. wrench to loosen the swage nut (2). Do not
remove the NPT thread adapter that is in the Q-RPT TEST(+) port.
Fully loosen the gland nut (7) connecting the Hi Q-RPT connection tube (9) to the Lo Q-RPT
isolation valve side port (7).
Fully loosen the gland nut (1) connecting the Hi Q-RPT connection tube (9) to the HPMS rear
panel TEST port adapter (1). Use a 5/8 in. wrench.
Carefully pull the Hi Q-RPT connection tube (9) out of the valve side port (7). Then, gently pull
the tube away from the RPM4 rear panel adapter (2) until the tube tip is free from the adapter.
r Remove the four nuts and lock washers (8) that hold the RPM4 rack mount brackets (10) to
the front of the HPMS bracket. Use a 7 mm wrench.
s Loosen but do remove the two nuts and lock washers (13) that hold the RPM4 rear support
bracket (12) to the rear of the HPMS bracket. Use a 7 mm wrench.
Remove the four screws and washers (11) that hold the RPM4 rear support bracket (13) to
the RPM4 rack mount brackets (10). Use a 3 mm allen wrench.
Grasp the RPM4 (4) and rack mount brackets (10) and move them away from the front of the
HPMS bracket and studs (8). The rear support bracket (13) should move away freely
because of the loosened nuts (13) holding it onto the HPMS brackets.
Once the rack mount brackets (10) clear the studs (8), the brackets can be removed from the
RPM4 and the RPM4 can move to the side out of the HPMS. Take care not to drop the
RPM4 when removing the rack mount brackets.
To reassemble, reverse the procedure. When reassembling the high pressure gland and
collar fittings, protect the conical tip from damage and be sure that the collar is fully threaded
on the nipple (left hand thread) before tightening the gland nut. Leak check all connections
after reassembly.
© 2007 DH Instruments, a Fluke Company
Page 114
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS
1.
2.
3.
4.
5.
6.
7.
HPMS TEST port connection
RPM4 Hi Q-RPT connection
RPM4 Lo Q-RPT connection
RPM4 A70M/A20M-AF
Lo Q-RPT connection tube
Lo RPT shutoff valve rear connection
Lo RPT shutoff valve side connection
8. RPM4 rack mount/HPMS connection
9. TEST port (DH500 F)
10. Hi Q-RPT connection tube
11. Rack mount bracket/rear support
bracket connection
12. Rear support bracket
13. Rear support bracket/HPMS connection
Figure 12. RPM4/HPMS disassembly view
5.4.2
OPENING AND CLOSING THE RPM4 ENCLOSURE
To open the RPM4 case, first remove the RPM4 from the HPMS (see Section 5.4.1). Once
the RPM4 is removed from the HPMS, proceed as follows:
n Place the RPM4 bottom side up on a stable, flat surface.
o Remove the four (4) Phillips head screws at the four corners of the RPM4 bottom panel.
p Remove the four plastic feet by sliding the away from the case. Do not pull them straight
up as this will damage their retaining tab.
q While holding the bottom panel and cover together, turn the RPM4 over and place it
bottom side down.
r Lift the top cover off of the bottom panel leaving the front and rear panels behind with the
bottom panel. The front and rear panel fit into guide slots on the top cover.
s To reassemble, reverse the procedure. Before putting the cover on, check that the front
is well seated in its guide slots on the bottom panel.
5.4.3
RELOADING EMBEDDED SOFTWARE INTO FLASH
MEMORY
RPM4 uses FLASH memory. This allows the embedded software that controls RPM4
operations and functions to be loaded into RPM4 over its COM1 port from a computer with a
simple FLASH loading utility program.
To replace corrupted software or upgrade your software, access the DHI web site at
www.dhinstruments.com and go to SOFTWARE. A FLASH loading utility and the latest
RPM4 software are available for download at no charge. If you do not have access to the
Page 115
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
web or have difficulty downloading or loading software, contact your DHI representative or a
DHI Authorized Service Provider (see Table 23) for assistance.
If you believe you have discovered an error or “bug” in RPM4 software, please report it with
complete details by email to cal.repair@dhinstruments.com.
The DHI flash software loading utility and RPM4 embedded software are available for
download from www.dhinstruments.com in the SOFTWARE section.
5.4.4
SUBASSEMBLY DESCRIPTION AND LOCATION
1.
2.
Micro card
Power Supply Module
(beneath Driver Board)
3.
4.
Driver Board
On-Board Barometer
5.
Lo Q-RPT module (A20M)
6.
7.
Hi Q-RPT module (A70M)
Display
Figure 13. RPM4 internal view
5.4.4.1
MICRO BOARD
The micro board supports a Motorola 68302 micro-controller, EPROM,
EEPROM, 128k x 16 bit NVRAM, 8 Mbit flash memory; RS-232 and IEEE-488.2
communications; keypad and display control. An I/O port controls other ports
and devices in RPM4.
© 2007 DH Instruments, a Fluke Company
Page 116
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS
5.4.4.2
POWER SUPPLY MODULE
+ 12 V DC (± 2 %) @ 2.1 Amps
5.4.4.3
DRIVER BOARD
The driver board is controlled by the mini micro board (see Section 5.4.4.1). It supports:
•
Frequency counters (2) for reading Q-RPTs (see Section 5.4.4.5)
•
On-board barometer power and output (see Section 5.4.4.4)
•
Power to the system cooling fan
•
Remote [ENT]
•
Keypad and display
•
Beeper
5.4.4.4
ON-BOARD BAROMETER
The on-board barometer supports a board mounted, barometric range,
micromachined silicon sensor and an ambient temperature sensor. The
barometer readings are used for dynamic atmospheric pressure compensation
when measuring gauge pressure with an absolute quartz reference pressure
transducer (see Section 3.2.2). The temperature sensor is used for temperature
compensation of the barometric sensor.
5.4.4.5
Q-RPT MODULE
The Q-RPT module is an integrated Quartz Reference Pressure Transducer (QRPT) assembly. The module includes a Q-RPT, brackets to hold the transducer,
interconnecting tubing and a manifold with TEST(+)and ATM ports.
A Q-RPT provides very high precision, low uncertainty pressure measurement.
The basic sensing principle is the measurement of the change in the natural
oscillating frequency of a quartz tuning fork in response to changes in
temperature and mechanical stress resulting from the change in pressure applied
to a connecting bellows or bourdon tube. Two independent quartz elements are
used. One quartz element is subjected to pressure related stress. The other quartz
element is used only to monitor temperature. See Section 1.2.2.1 for Q-RPT
specifications.
See Section 5.4.5, Figure 14 for a pneumatic schematic of the Q-RPT module
configuration.
HI Q-RPT MODULE
The RPM4 A70M/A20M-AF Hi Q-RPT is an A70M. The A70M has a pressure
range of atmosphere to 10 000 psi (70 MPa) absolute, 0 to 10 000 psi (70 MPa)
gauge.
LO Q-RPT MODULE
The RPM4 A70M/A20M-AF Lo Q-RPT is an A20M. The A20M has a pressure
range of atmosphere to 3 000 psi (20 MPa) absolute, 0 to 3 000 psi (20 MPa)
gauge.
5.4.4.6
DISPLAY
2 x 20 character vacuum fluorescent display.
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© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
5.4.4.7
COOLING FAN
The cooling fan is mounted on the RPM4 rear panel and connected to the main
board. It is a 12V brushless DC fan.
5.4.5
Q-RPT MODULE PNEUMATIC SCHEMATIC
Figure 14. Pneumatic schematic of RPM4 Q-RPT Module
5.5
RPM4 ILLUSTRATED PARTS BREAKDOWN
Table 21. RPM4 Front Panel Illustrated Parts Breakdown (see Figure 15)
# REQUIRED
DESCRIPTION
PART NO.
1
Enclosure, top
103041
4
Feet, set
103042
4
Screw, feet
1
Key pad overlay
103295-z
123560
Figure 15. RPM4 Illustrated Parts Breakdown of Front Panel
© 2007 DH Instruments, a Fluke Company
Page 118
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS
Table 22. RPM4 Rear Panel Illustrated Parts Breakdown (see Figure 16)
# REQUIRED
DESCRIPTION
PART NO.
1
Rear panel
124154
8
Screw
.30C100MXFS
1
Fan
D2510M12B
1
Fan guard
JGW25
2
Screw
.25C160MXPS
1
Power entry module
06AK2D
2
Fuse,1A/250V,SLO-BLO,5X20
218001
1
DC power jack
103285
1
IEEE-488 assembly
401420
2
Screw lock kit
102073
1
J1 Accessory assembly
402195
2
Adaptor
2CM2-316
Figure 16. RPM4 Illustrated Parts Breakdown of Rear Panel
Page 119
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
Table 23. RPM4 Illustrated Parts Breakdown of Display Assembly (see Figure 17)
# REQUIRED
DESCRIPTION
PART NO.
1
Display assembly
103122
1
Ribbon cable
401963
1
Panel, front
123566
2
Standoff, M3
SS-5172-14.0-00
4
Screw, M3
.30C60KCSS
11
Washer
.30NWSFS
5
Lock washer
.30NLOCS
1
Retainer plate
123568
1
Nut, M3
.30CNFHS
Figure 17. RPM4 Illustrated Parts Breakdown of Display Assembly
© 2007 DH Instruments, a Fluke Company
Page 120
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS
Table 24. RPM4 Illustrated Parts Breakdown of Internal Assembly (see Figure 18)
# REQUIRED
DESCRIPTION
PART NO.
1
Bracket, barometer
123549
1
Barometer assembly
401898-06
1
Cable assembly, barometer
401966
8
Screw
.30C60KCSS
14
Lock washer
.30NLOCS
6
Screw
122037-Z
1
Adaptor
APCR206CR16WN
1
Tubing, vinyl
APO2PV170
1
Tubing, polyurethane
3814-7-BK-RL
1
Ferrite sleeve
ZCAT1518-0730T
1
Electronic chassis
123565
5
Nut
123707
5
Screw
100550-Z
Figure 18. RPM4 Illustrated Parts Breakdown of Internal Assembly
Page 121
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
Table 25. RPM4 Illustrated Parts Breakdown of Internal Assembly (see Figure 19)
# REQUIRED
DESCRIPTION
PART NO.
1
Manifold, A20M
123521
1
Manifold, A70M
124410
14
Screw, M3
.30C60KCSS
14
Lock washer, M3
.30NLOCS
4
o-ring, 5-193
5-193-V884-75
2
Bracket, transducer
123583
2
Cowling, transducer
123511
2
Transducer
807029
1
Tee
209-1
2
Union
SS-100-6
2
Adaptor, ss
SS-100-1-0S
2
Adaptor, barb
MH-1012-V
1
Plug, ss
124411
Figure 19. RPM4 Illustrated Parts Breakdown of Internal Assembly
© 2007 DH Instruments, a Fluke Company
Page 122
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS
Table 26. RPM4 Illustrated Parts Breakdown of Electronic Chassis (see Figure 20)
# REQUIRED
DESCRIPTION
PART NO.
1
Micro card
401365
4
Standoff
SS-5172-200-00
10
Screw
.30C80KCSS
11
Lock washer
.30NLOCS
1
Driver board
401745
1
Power supply
103284
4
Standoff
.30C300SFTS
4
Washer
.30NWSFS
1
Cable assembly, DC power
401962
1
Cable assembly, AC power
401964
Figure 20. RPM4 Illustrated Parts Breakdown of Electronic Chassis
Page 123
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
5.6
HPMS MAINTENANCE
There are no HPMS maintenance procedures other than the overhaul procedure.
5.6.1
HPMS OVERHAUL
RPM4/HPMS A70M/A20M-AF is generally overhauled as one common assembly.
Removal of RPM4 from the HPMS is not recommended unless required to perform
RPM4 and/or HPMS repairs. See Section 5.4.1 if it is necessary to remove the RPM4 from
the HPMS.
Any or all of the following items may be included as part of an RPM4/HPMS A70M/A20MAF overhaul:
•
Check that RPM4 rear panel mounted cooling fan operates when RPM4 is powered.
•
Clean and inspect HPMS rear panel TEST port connection.
•
Check that internal fittings, screws, bolts and nuts are tight.
•
Perform system leak and operational check.
•
Check Lo Q-RPT pressure relief valve for proper operation. It should crack at about
3 300 psi. Do not apply pressure greater than 3 600 psi to the RPM4 Lo Q-RPT as it
may be damaged beyond repair. The RPM4 warranty does not cover damage due
to Q-RPT overpressure.
•
Clean RPM4 and HPMS front panel.
•
Verify that RPM4 internal barometer reads atmospheric pressure within ± 0.15 psi
(1 kPa). Adjust if necessary (See Section 5.2.2).
•
Perform calibration of quartz reference pressure transducers (Q-RPTs), if necessary (see
Section 5.3)
© 2007 DH Instruments, a Fluke Company
Page 124
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS
5.7
HPMS ILLUSTRATED PARTS BREAKDOWN
Table 27. HPMS Assembly Illustrated Parts Breakdown (see Figure 21 and 22)
# REQUIRED
DESCRIPTION
PART NO.
1
HPMS bracket
124142
1
RPM4 mounting bracket, rear
124143
1
RPM4 mounting bracket, side
124155
1
High pressure manaul valve
1
Valve nut
122039
1
Valve seat
122034
1
Tube weld assembly
124146
1
Tube weld
124147
1
Tee connector
SS-200-3
1
Tube, 248 mm
304-F2-125
1
Tube, 40 mm
304-F2-125
1
Bracket, Relief valve
123118
1
Pressure relief valve
402188
1
DH500 bulkhead
1
Foot switch cable assembly (Not Pictured)
402196
1
LED, green
252-122
2
LED, red
252-121
4
Rubber foot pad
1
Adaptor
2
DH200 gland
20-2LM4
2
DH200 collar
20-2L4
1
DH500 gland
60-2HM4
1
DH500 collar
60-2H4-316
2
Adaptor
2CM2-316
14
Lockwasher, M4
.40NLOCS
11
Washer, M4
.40NWSAS
12
Nut, M4
.40CNFHS
2
Screw, M3 x 10
.30C100MXFS
4
Screw, M4 x 10
.40C100KCSS
400902-02
123812-01
2959-405-BLK
SS-200-R-4
Page 125
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
Figure 21. HPMS Schematic
© 2007 DH Instruments, a Fluke Company
Page 126
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS
Figure 22. RPM4/HPMS-AF Assembly
Page 127
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
NOTES
© 2007 DH Instruments, a Fluke Company
Page 128
6. TROUBLESHOOTING
6.
TROUBLESHOOTING
RPM4 is a sophisticated pressure setting and measuring instrument with advanced on-board features and
functions. Before assuming that unexpected behavior is caused by a system defect or breakdown, the
operator should use this manual and other training facilities to become thoroughly familiar with RPM4
operation. This troubleshooting guide is intended as an aid in identifying the reason for RPM4 behavior
and determining whether the behavior is normal operation or due to an internal or external problem.
Identify the symptom or unexpected behavior you are observing from the SYMPTOM list below.
A PROBABLE CAUSE is provided and a SOLUTION is proposed including references to manual
sections that provide information that may be of assistance.
Table 28. Troubleshooting guide
SYMPTOM
PROBABLE CAUSE
SOLUTION
Will not power up.
Blown fuse.
Replace fuse.
Cannot access certain functions
>ACCESS RESTRICTED<
User level has been set that restricts access
to certain functions.
Change user level or consult system
manager. 3.5.5.5
Displays <FATAL ERROR> or
<FATAL FAULT>.
Encountered unresolved internal software
conflict.
Cycle power to clear. Please record
conditions leading up to event including
the numbers displayed when [ENT] is
pressed and report to your DHI
Authorized Service Provider. Table 23
Front panel keys seem to be
disabled.
”remote” command has been sent from a
host computer.
Send ”local” command from host
computer or cycle RPM4 power. 4, 4.4.4
Measured pressure display or
other displays have too much/not
enough resolution.
Resolution setting needs to be changed.
Change resolution setting using the
resolution function, using AutoRange or
by initializing an AutoTest. 3.4.2, 3.3.4,
3.3.10
Can’t increase resolution to level
desired in AutoRanged range.
Resolution setting is limited when
AutoRanging under 10 % of Q-RPT default
range.
Operation is normal. 3.3.4, Table 6
Values that should be non-zero
are displayed as zero.
Resolution setting needs to be increased to
view significant digits.
Change resolution setting. 3.4.2
Keypad presses make undesired
sounds or NO sounds.
Keypad sound settings are incorrect.
Use SOUND function to set keypad
sounds as desired. 3.5.5.2
Bottom line of display has
changed and you want to change
it back.
The DISPLAY function has been used to
change the display.
Use [DISPLAY] to set bottom line to
desired display. 3.3.6
Bottom line of display is blank.
DISPLAY mode is “clean”.
Use [DISPLAY] to change bottom line
display if desired. 3.3.6
The pressure units available
under the [UNIT] function key are
not the ones you want.
UNIT function needs to be customized.
Use PresU function to customize the
UNIT function or reset units to default.
3.5.6, 3.5.9.2
Front panel display is dim.
Screen saver option has activated.
Operation is normal. Press any key to
resume full screen power. Adjust screen
saver time, if desired. 3.5.5.1
Page 129
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
SYMPTOM
PROBABLE CAUSE
SOLUTION
The Q-RPT range does not cover the
specified AutoRange full scale pressure.
Check that Q-RPT default range is high
enough to cover the AutoRange. 3.2.3
The specified operating mode is absolute
and absolute is OFF for the desired Q-RPT
Check that absolute measurement mode is
ON for the Q-RPT. 5.3.5
Pressure display is flashing and
beeper is sounding intermittently.
Current upper limit of active range has been
exceeded.
Reduce pressure. Change UL and/or
change active range using [RANGE],
[AUTORANGE] or AutoTest. 3.4.4,
3.3.4, 3.3.10
“Hi (or Lo) Q-RPT EXCEEDED
PMAX” displays alternating with
normal display.
RPM4 Q-RPT has been overpressured
(Pmax! exceeded).
Correct the overpressure condition and
cycle power ON and OFF to clear.
Q-RPT may be damaged! 3.4.4.1
Display is
<!!!LO RPT ACTIVE!!!>
the HPMS CAUTION LO RPT
ACTIVE light is flashing and
RPM4 is beeping.
The Lo Q-RPT is receiving pressure but the
Hi Q-RPT is currently selected.
Since the Hi Q-RPT is selected on
RPM4, the Lo Q-RPT should be shut off
by the LO Q-RPT SHUTOFF valve.
Reduce pressure and close the
LO Q-RPT SHUTOFF valve or select the
Lo Q-RPT on the RPM4. Do not apply
more than 3 000 (20 MPa) to the
Lo Q-RPT. 3.2.5
A Ready (green Ready/Not Ready
indicator) indication is never
achieved.
Stability settings is too tight and/or existing
conditions will not allow Ready to be
achieved.
Adjust stability setting or correct other
conditions. Consider using an AutoTest to
set stability appropriately. 3.4.3, 3.2.1,
3.3.10
Cannot select absolute
measurement mode.
Absolute measurement mode has been
turned off in the calibration function.
Check that absolute is ON for the Q-RPT.
5.3.5
Display update rate of indicated
pressure changes when changing
pressure.
RPM4 automated read rate function is ON to
automatically adjust read rate depending
upon rate of change of pressure.
Operation is normal. Turn automated
read rate function OFF if desired. 3.5.7.2
Display update of indicated
pressure is too slow when
pressure is changing quickly.
RPM4 automated read rate function is OFF.
Turn automated read rate function ON to
automatically adjust read rate depending
on pressure rate of change. 3.5.7.2
Pressure is changing but display
of pressure is NOT and the
bottom right hand corner of the
display is a numerical countdown
followed by <avg>.
Average DISPLAY function is ON and
pressure display is updating only with the
average value at the end of each averaging
cycle.
Go to a DISPLAY function other than
average or press [+/-] to get the
instantaneous value Average DISPLAY.
3.3.6
Pressure measurement seems
erratic.
The RPM4 and/or the connection to the test
system and or the GPC1 pressure controller
is contaminated with liquids.
Purge and clean affected systems.
Contact DHI Authorized Service
Provider if RPM4 is contaminated
internally. 8, Table 23
These is a leak in the pressure system to
which RPM4 is connected.
Find and correct leak. Consider using
RPM4 leak check function. 3.3.5
The pressure applied to the RPM4 has
recently been changed and the pressure is
still stabilizing.
The time it takes for pressure to stabilize
after making a pressure change
increases with the size of the pressure
change and size of the test volume. Up
to five minutes or more can be required
for pressure to stabilize within 0.001% of
the measured pressure
The RPM4 display resolution is higher than
is necessary and you are observing normal
evolution of the pressure (Note: if viewed
with enough resolution, pressure is
NEVER perfectly stable).
Use the resolution setting function,
AutoRange or AutoTest to reduce
resolution to a level that is appropriate
for the test being run or the uncertainty of
the device being calibrated. 3.4.2, 3.3.4,
3.3.10
Disagreement between two Q-RPTs
in system appears excessive.
Difference is actually within tolerance and
acceptable disagreement.
Compare differences observed to
tolerances on Q-RPT measurements.
1.2.2.1
Apparent inaccurate pressure
control/measure and little or no
response from Q-RPT:
Reference transducer destroyed by
overpressure.
Contact DHI Authorized Service Provider.
8, Table 23
AutoRange is not selecting the
desired Q-RPT for the specified
range.
Pressure indicated by RPM4
never becomes stable.
© 2007 DH Instruments, a Fluke Company
Page 130
6. TROUBLESHOOTING
SYMPTOM
PROBABLE CAUSE
SOLUTION
Incorrect pressure units and/or measurement
mode (gauge or absolute).
Set desired pressure units and/or
measurement mode. Consider reference
temperature if unit is inWa. 3.3.2, 3.3.3
Q-RPT calibration coefficients have been
altered.
Check and correct calibration coefficients if
needed. 5.3
AutoZ has been run and turned ON with an
incorrect standard for zero.
Check value of Poffset. Rerun AutoZ with a
valid reference. 3.5.1
An unplanned “head” correction is active or
head height or fluid is incorrect.
Operation is normal. Remove or change
“head” correction. 3.3.7
A head correction is applied and current
indication is the value of the head.
Operation is normal. 3.3.7, 3.3.9.1, 3.5.1
Need to run AutoZ to rezero in gauge mode.
Run AutoZ. 3.3.9.1
Current measurement mode is absolute and
RPM4 is indicating atmospheric pressure.
Check measurement mode setting and
set to gauge if gauge pressure
measurements are desired. 3.3.3
Pressure applied is atmospheric
but RPM4 indicates near zero.
Current measurement mode is gauge and
RPM4 is indicating zero gauge pressure.
Check measurement mode setting and
set to absolute if absolute pressure
measurements are desired. 3.3.3
Is NOT reading pressure applied
to the Lo Q-RPT.
HPMS Lo Q-RPT Shut Off Valve is closed
shutting off the Lo Q-RPT from the HPMS
TEST port.
RPM4 has two TEST ports and pressure to
be measured is connected to correct port but
active Q-RPT is NOT the Q-RPT on that
TEST port.
You are in a Display mode other than Rate
that uses the [ENT] key.
Familiarize yourself with the HPMS
configuration and operation. Open the
Lo Q-RPT Shut Off Valve. 3.2.5
Familiarize yourself with your RPM4
configuration. Set active Q-RPT and
range to read on desired test port.
2.4.3.2, 3.2.3, 3.3.1
Press [DISPLAY] and set the Display
mode to Rate. 3.3.6.2
Apparent inaccurate pressure
measurement.
Apparent inaccurate pressure
measurement and <h> is
displayed on top line of screen.
AutoZ was just run in gauge mode
but measurement indication is
NOT zero. <h> is displayed on
top line of screen.
Pressure applied is zero gauge
but reading is NOT zero.
Is NOT reading pressure applied
to RPM4 TEST port.
[ENT] is not accessing
AutoTest function.
the
Page 131
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
NOTES
© 2007 DH Instruments, a Fluke Company
Page 132
7. APPENDIX
7.
APPENDIX
7.1
UNIT CONVERSION
7.1.1
PRESSURE
RPM4 performs all internal calculations in SI units. Numerical values input or output in other units
are converted to SI immediately after entry and back to other units just before output as needed.
Table 28 provides the conversion coefficients used by RPM4 to convert numerical values
expressed in SI units to corresponding values expressed in other units.
Table 29. Pressure unit of measure conversion coefficients
TO CONVERT FROM Pa To
MULTIPLY BY
Pa
Pascal
1.0
mbar
millibar
1.0 E-02
hPa
hecto Pascal
1.0 E-02
kPa
kilo Pascal
1.0 E-03
bar
Bar
1.0 E-05
mmWa @ 4°C
millimeter of water
1.019716 E-01
mmHg @ 0°C
millimeter of mercury
7.50063 E-03
psi
pound per square inch
1.450377 E-04
psf
pound per square foot
1.007206 E-06
inWa @ 4°C
inch of water
4.014649 E-03
inWa @ 20°C
inch of water
4.021732 E-03
inWa @ 60°F
inch of water
4.018429 E-03
inHg @ 0°C
inch of mercury
2.953 E-04
kilogram force per centimeter square
1.019716 E-05
User
User defined coefficient
kcm
2
user
Page 133
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
NOTES
© 2007 DH Instruments, a Fluke Company
Page 134
8. WARRANTY
8.
WARRANTY
8.1
OVERVIEW
Except to the extent limited or otherwise provided herein, DH Instruments, a Fluke Company warrants
for one year from purchase, each new product sold by it or one of its authorized distributors, only against
defects in workmanship and/or materials under normal service and use. Products which have been
changed or altered in any manner from their original design, or which are improperly or defectively
installed, serviced or used are not covered by this warranty.
DH Instruments and any of its Authorized Service Providers’ obligations with respect to this warranty are
limited to the repair or replacement of defective products after their inspection and verification of such
defects. All products to be considered for repair or replacement are to be returned to DH Instruments or
its Authorized Service Provider after receiving authorization from DH Instruments or its Authorized
Service Provider. The purchaser assumes all liability vis a vis third parties in respect of its acts or
omissions involving use of the products. In no event shall DH Instruments be liable to purchaser for any
unforeseeable or indirect damage, it being expressly stated that, for the purpose of this warranty, such
indirect damage includes, but is not limited to, loss of production, profits, revenue, or goodwill,
even if DH Instruments has been advised of the possibility thereof, and regardless of whether such
products are used individually or as components in other products.
Items returned to DHI under warranty claim but determined to not have a defect covered under warranty
or to not have a defect at all are subject to an evaluation and shipping charge as well as applicable repair
and/or calibration costs.
The provisions of this warranty and limitation may not be modified in any respect except in writing signed
by a duly authorized officer of DH Instruments.
The above warranty and the obligations and liability of DH Instruments and its Authorized Service
Providers exclude any other warranties or liabilities of any kind.
Table 30. DHI Authorized Service Providers
DH INSTRUMENTS, A FLUKE COMPANY
AUTHORIZED SERVICE PROVIDERS
COMPANY
TELEPHONE,
FAX & EMAIL
ADDRESS
NORMAL SUPPORT
REGION
DH Instruments, a Fluke
Company
4765 East Beautiful Lane
Phoenix AZ 85044-5318
USA
Tel 602.431.9100
Fax 602.431.9559
cal.repair@dhinstruments.com
Worldwide
Minerva Meettechniek B.V.
Chrysantstraat 1
3812 WX Amersfoort
the NETHERLANDS
Tel (+31) 33.46.22.000
Fax (+31) 33.46.22.218
info@minervaipm.com
European Union
Ohte Giken, Inc.
Technology Center
258-1, Nakadai
Kasumigaura-machi,
Niihari-Gun,
Ibaraki 300-0133
Tel 81/29.840.9111
Fax 81/29.840.9100
tech@ohtegiken.co.jp
Japan/Asia
Page 135
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
NOTES
© 2007 DH Instruments, a Fluke Company
Page 136
9. GLOSSARY
9.
GLOSSARY
Axxx
A type of Q-RPT with a built-in vacuum reference that is intrinsically absolute (e.g. A10M).
Axxx Q-RPTs support absolute, gauge and negative gauge measurement modes.
Absolute Mode
Measurement mode in which the Q-RPT indicates absolute pressure (difference from vacuum).
Active Q-RPT
The Q-RPT that is currently selected to be displayed on the top line of the RPM4
display. Most function selections affect the active Q-RPT.
AutoRange
A function that optimizes RPM4 measurement and control for a specific, user defined
range of operation.
AutoRanged Range
An RPM4 pressure measurement range created using the AutoRange function.
AutoTest or ATest
RPM4 on-board automated testing sequences and their results.
AutoZero or AutoZ
A process by which a Q-RPT and measurement mode is rezeroed (offset) relative to a standard.
Barometer
RPM4’s on-board atmospheric pressure measuring sensor. Also referred to as on-board barometer.
BGxxx
A type of Q-RPT that is intrinsically gauge and is capable of operating bi-directionally,
above and below atmosphere, through zero. BGxxx Q-RPTs support gauge and
negative gauge measurement modes.
Default Range (DF)
A Q-RPT’s maximum range that is always available using [RANGE] and cannot be deleted.
Deviation
A DISPLAY function in which the deviation of the current pressure from a target pressure
is displayed.
DUT
Device Under Test. The device or devices pneumatically connected to the RPM4
TEST(+) port that the RPM4 is being used to test or calibrate.
Differential mode
Measurement mode in which the measured pressure is the different between the Hi and
Lo Q-RPT (Hi – Lo).
FS
Abbreviation of “full scale”. The full scale value is the maximum pressure of a measurement
range. Limits and specifications are often expressed as % FS. Also see span.
Gxxx
A type of Q-RPT that is intrinsically gauge but only measures pressure greater than
atmosphere. Gxxx Q-RPTs support gauge measurement mode only.
Gauge Mode
Measurement mode in which the Q-RPT indicates gauge pressure (difference from
atmospheric pressure), but only in the positive direction (above atmosphere).
Head
A difference in height between the RPM4 reference level and the DUT.
HiLo
A DISPLAY function in which the highest and lowest pressure measurements since
reset are recorded and displayed.
Hi Q-RPT
The designation of a single Q-RPT in an RPM4, or, if there are two, the one that has the
highest full scale default range. This is the A70M (10 000 psi) in the RPM4
A70M/A20M-AF.
HL Q-RPT
The designation of the pseudo Q-RPT that results from the combination of using two QRPTs simultaneously in parallel measurement mode.
HPMS
High pressure mounting system: Bracket used to hold the RPM4 and isolate the Lo QRPT from the test pressure when it is not in use.
Inactive Q-RPT
In an RPM4 with two Q-RPTs, the Q-RPT that is not currently displayed on the top line
of the display. The inactive Q-RPT may be displayed on the second line of the RPM4
display using the Q-RPT DISPLAY function.
Lo Q-RPT
The designation of a the Q-RPT with the lower full scale default range in RPM4s with
two Q-RPTs. This is the A20M (3 000 psi) in the RPM4 A70M/A20M –AF.
Measurement Mode
Whether pressure is being measured relative to absolute zero or vacuum (absolute mode)
or relative to atmospheric pressure (gauge mode).
Negative gauge or
compound gauge
Measurement mode in which the Q-RPT indicates gauge pressure (difference from
atmospheric pressure), in both positive and negative directions (above and below
atmosphere).
Page 137
© 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
Poffset
The difference between a Q-RPT reading and the AutoZero reference at the time AutoZ
is run. Used by the AutoZ function when Auto Z is ON to compensate Q-RPT readings
for changes in zero over time.
Pstd,0
AutoZero reference value. Value indicated by the device against which the Q-RPT is
zeroed by AutoZ.
PA
Pressure adder, used to offset a Q-RPT or barometer to calibrate it.
PM
Pressure multiplier, used to adjust span of a Q-RPT or barometer to calibrate it.
Parallel Measurement
Mode
Operating mode of RPM4s with two Q-RPTs in which both Q-RPTs are used to measure
together in parallel and the indicated pressure is the average of their readings. This
creates a pseudo Q-RPT designated HL.
Pmax!
The maximum pressure limit of a Q-RPT. If the pressure measured by the Q-RPT
exceeds Pmax!, an overpressure condition occurs.
PPC3
Pressure controller calibrator manufactured by DHI. RPM4 can be used as an external
reference device for a PPC3. PPC3 automates RPM4 pressure control.
Q-RPT
(Quartz Reference
Pressure Transducer)
The transducer used by RPM4 for low uncertainty pressure measurement. May be
designated as Hi, Lo or HL depending on its position and role in t he RPM4.
Q-RPTs are designated by a leading A, G or BG (absolute, gauge or bi-directional
gauge) followed by three numbers and a letter indicating the maximum range of the QRPT in kPa (nnnK) or MPa (nnnM).
Rate
A DISPLAY function in which the rate of change of pressure in pressure unit/second is
displayed.
Ready/Not Ready
Front panel LED indication of when the pressure measured by RPM4’s active Q-RPT is
stable within the stability limit. Leading character of the second line when the inactive
Q-RPT is displayed on the second line in Q-RPT DISPLAY mode.
RPT2x
Parallel measurement mode in which both Q-RPTs of an RPM4 with two Q-RPTs are
used together and the indicated pressure is the average of their measurements.
SDS (Self Defense
System)
A system to protect Q-RPTs from overpressure made up of isolation and vent valves
and internal operating logic. SDS is not used in RPM4 A70M/A20M-AF.
Span
The difference between FS and the lowest point in a range. For example, the span of a
100 kPa FS range in negative gauge mode is nominally 200 kPa (from - 100 kPa to 100 kPa).
Stability Limit
A limit expressed in units of pressure per second (e.g., kPa/second). The stability limit is used
as the Ready/Not Ready criterion. Ready if rate of change is less than stability limit.
Not Ready if rate of change is greater than stability limit.
Target
The value from which deviations are measured in the Deviation DISPLAY function.
UL (Upper Limit)
A user settable maximum pressure limit. When pressure exceeds UL, RPM4 beeps
intermittently. In negative gauge measurement mode, there is also a user settable lower limit.
User Level
Levels of security that can be set to protect certain RPM4 functions from being accessed.
QDUT
On-board automated test sequence that AutoRanges RPM4 based on characteristics of
the Device Under Test (DUT).
© 2007 DH Instruments, a Fluke Company
Page 138
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