Vaisala HUMICAP HMP41 User`s guide

USER'S GUIDE
®
Vaisala HUMICAP Humidity and
Temperature Transmitter Series
HMT130
M211280EN-A
PUBLISHED BY
Vaisala Oyj
P.O. Box 26
FI-00421 Helsinki
Finland
Phone (int.): +358 9 8949 1
Fax:
+358 9 8949 2227
Visit our Internet pages at http://www.vaisala.com/
© Vaisala 2010
No part of this manual may be reproduced in any form or by any means, electronic or
mechanical (including photocopying), nor may its contents be communicated to a third
party without prior written permission of the copyright holder.
The contents are subject to change without prior notice.
Please observe that this manual does not create any legally binding obligations for
Vaisala towards the customer or end user. All legally binding commitments and
agreements are included exclusively in the applicable supply contract or Conditions of
Sale.
________________________________________________________________________________
Table of Contents
CHAPTER 1
GENERAL INFORMATION............................................................................ 7
About This Manual ................................................................... 7
Contents of This Manual ....................................................... 7
Version Information ............................................................... 8
Related Manuals ................................................................... 8
Documentation Conventions ................................................. 8
Safety......................................................................................... 9
ESD Protection ......................................................................... 9
Recycling .................................................................................. 9
Regulatory Compliances ....................................................... 10
Patent Notice .......................................................................... 10
Trademarks ............................................................................. 10
License Agreement ................................................................ 10
Warranty.................................................................................. 11
CHAPTER 2
PRODUCT OVERVIEW................................................................................ 13
Introduction to the HMT130................................................... 13
Accessories ......................................................................... 14
Fixed and Remote Probe Models ....................................... 14
Optional Display .................................................................. 14
Interchangeable Probe........................................................ 14
Constant Output Probe ....................................................... 15
Transmitter Components..................................................... 16
CHAPTER 3
INSTALLATION............................................................................................ 17
Mounting ................................................................................. 17
Wall Mounting ..................................................................... 17
Installation with Rain Shield ................................................ 18
Installation with Radiation Shield ........................................ 19
Duct Installation Kit ............................................................. 20
Probe Assembly with Duct Installation Kit ..................... 21
Drilling Instructions for Duct Installation Kit ................... 21
Probe Mounting Flange....................................................... 22
Probe Mounting Clamp ....................................................... 23
Connections............................................................................ 24
RS-485 Bus Termination..................................................... 26
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User's Guide ______________________________________________________________________
CHAPTER 4
OPERATION.................................................................................................27
Using the Service Port ...........................................................27
Installing the Driver for the USB Cable................................27
Terminal Application Settings..............................................28
List of Serial Commands .......................................................30
Device Information and Status..............................................31
Show Device Information ....................................................31
Set/Show Available Quantities ............................................31
Set/Show Calibration Date ..................................................32
Set/Show Calibration Information........................................32
Show Analog Output Status ................................................33
Show System Information ...................................................34
Show Firmware Version ......................................................34
Serial Line Output Commands ..............................................34
Start Continuous Outputting ................................................34
Stop Continuous Outputting ................................................35
Set/Show Output Interval ....................................................35
Output a Reading Once.......................................................35
Calibration Commands ..........................................................36
Calibrate Humidity Measurement ........................................36
Restore Probe RH Factory Calibration................................37
Calibrate Temperature Measurement .................................37
Restore Probe T Factory Calibration...................................38
Calibrate Analog Output ......................................................38
Configuring Serial Line Operation ........................................39
Set/Show Serial Line Settings .............................................39
Set/Show Terminal Echo.....................................................39
Set/Show Serial Interface Mode..........................................40
Configuring Measurement Parameters ................................40
Set/Show Environmental Parameters .................................40
Configuring Analog Output ...................................................41
Set/Show Analog Output Mode ...........................................41
Set/Show Analog Output Error Levels.................................42
Set/Show Analog Output Quantity and Scaling...................42
Test Analog Outputs............................................................44
Configuring Relay Output......................................................44
Set/Show Relay Quantity ....................................................44
Set/Show Relay Operating Mode ........................................45
Show Relay Settings ...........................................................45
Other Commands ...................................................................46
Set/Show Displayed Quantities ...........................................46
Set/Show Output Formatting ...............................................47
Display Command List ........................................................48
Display Active Errors ...........................................................48
Save Changed Settings.......................................................48
Restore Saved Settings.......................................................49
Reset Transmitter ................................................................49
Restore Factory Settings.....................................................49
Set/Show Output Unit..........................................................50
2 ___________________________________________________________________ M211280EN-A
________________________________________________________________________________
Operating the User Port (RS-485) ......................................... 50
Networking Commands....................................................... 50
SERI............................................................................... 50
SERI2............................................................................. 50
ECHO............................................................................. 51
SMODE .......................................................................... 51
SDELAY ......................................................................... 51
INTV ............................................................................... 52
ADDR ............................................................................. 52
SEND ............................................................................. 52
OPEN ............................................................................. 53
CLOSE ........................................................................... 53
CHAPTER 5
MAINTENANCE ........................................................................................... 55
Replacing the HUMICAP® Sensor ......................................... 55
Fixed and Remote Probe Models ....................................... 55
Removing and Fastening the Probe..................................... 56
Fixed Probe Model .............................................................. 56
Remote Probe Model .......................................................... 57
Calibration and Adjustment .................................................. 58
HMT130 Push-Button Calibration ....................................... 58
Humidity and Temperature Adjustment .............................. 59
Adjustment with HM70 ........................................................ 62
Field Checking and Adjustment Using a Calibrated
Reference Probe ............................................................ 63
One-Point Adjustment Using a Calibrator...................... 63
Two-Point Adjustment Using a Calibrator...................... 65
LiCl-NaCl Adjustment..................................................... 65
Temperature Field Check and Adjustment by Using a
Calibrated Reference Probe .......................................... 66
Adjustment with HMI41 ....................................................... 67
Connections and Selecting the Calibrator Function....... 68
Offset and Gain Adjustments ......................................... 69
HMI41 as a Reference Meter.................................... 70
HMI41 as a Terminal................................................. 71
Troubleshooting ............................................................. 72
Analog Output Tests .............................................................. 73
CHAPTER 6
TROUBLESHOOTING ................................................................................. 75
Error Codes............................................................................. 75
Solving Typical Problems ..................................................... 76
Analog Output Error Notification.......................................... 77
Technical Support .................................................................. 77
CHAPTER 7
TECHNICAL DATA ...................................................................................... 79
Specifications ......................................................................... 79
Options and Accessories ...................................................... 81
Transmitter Dimensions ........................................................ 82
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User's Guide ______________________________________________________________________
APPENDIX A
CALCULATION FORMULAS.......................................................................85
Dewpoint Temperature...........................................................85
Dew/frostpoint Temperature..................................................86
Mixing Ratio ............................................................................87
Absolute Humidity..................................................................87
Enthalpy...................................................................................87
Saturation Vapor Pressure ....................................................88
Water Vapor Pressure ............................................................89
INDEX ...........................................................................................................91
4 ___________________________________________________________________ M211280EN-A
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List of Figures
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19
Figure 20
Figure 21
Figure 22
Figure 23
HMT130 Components .............................................................. 16
HMT130 Wall Mounting............................................................ 17
HMT130 Installation with Rain Shield ...................................... 18
Installation of the Probe with Radiation Shield......................... 19
Probe Installation with the Duct Installation Kit ........................ 20
Assembly of the Probe with Duct Installation Kit...................... 21
Drilling Instructions ................................................................... 21
Optional Probe Mounting Flange ............................................. 22
Optional Probe Mounting Clamp .............................................. 23
HMT130 Component Board ..................................................... 24
Power Supply And Voltage Outputs......................................... 25
Serial Communication and Relay............................................. 26
PuTTY Terminal Application .................................................... 29
Removing the Humidity Probe (Fixed Probe Model)................ 56
Removing the Humidity Probe (Remote Probe Model)............ 57
Adjustment Buttons .................................................................. 58
Location of the MI70 Probe and Cable Connector Ports ......... 62
Example of the MI70 Adjustment Menu ................................... 64
Example of the MI70 Adjustment Mode Graph Display ........... 64
Location of the HMI41 Calibration Connector .......................... 67
HMT130 Output Voltage Measurement ................................... 73
Dimensions of the Fixed Probe Model in mm (inches) ............ 82
Dimensions of the Remote Probe Model in mm (inches)......... 83
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User's Guide ______________________________________________________________________
List of Tables
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
Table 8
Table 9
Table 10
Table 11
Table 12
Table 13
Table 14
Manual Revisions .......................................................................8
Related Manuals.........................................................................8
Wiring Table..............................................................................26
Default Serial Interface Setting.................................................28
Serial Port Commands .............................................................30
Common Problems During Adjustment and Their Remedies ..72
Error Codes and Texts .............................................................75
Troubleshooting Table..............................................................76
Relative Humidity Measurement Specifications .......................79
Temperature Measurement Specifications...............................79
Operating Environment Specifications .....................................80
Inputs and Outputs ...................................................................80
Mechanical Specifications ........................................................81
Options and Accessories..........................................................81
6 ___________________________________________________________________ M211280EN-A
Chapter 1 ________________________________________________________ General Information
CHAPTER 1
GENERAL INFORMATION
This chapter provides general notes for the manual and HMT130.
About This Manual
This manual provides information for installing, operating, and
maintaining the Humidity and Temperature Transmitter HMT130.
Contents of This Manual
This manual consists of the following chapters:
- Chapter 1, General Information, provides general notes for the manual
and HMT130.
- Chapter 2, Product Overview, provides general information about the
Vaisala Humidity and Temperature Transmitter HMT130
- Chapter 3, Installation, provides information on the installation of
Vaisala Humidity and Temperature Transmitter HMT130
- Chapter 4, Operation, contains information that is needed to operate
the HMT130.
- Chapter 5, Maintenance, provides information that is needed in basic
maintenance of the product.
- Chapter 6, Troubleshooting, describes error messages and analog
output error behavior, introduces some common problems, their
probable causes and remedies and provides contact information for
Technical Support
- Chapter 7, Technical Data, provides the technical data of the product.
- Appendix A, Calculation Formulas, contains the formulas used for the
calculated output quantities.
- INDEX
VAISALA ________________________________________________________________________ 7
User's Guide ______________________________________________________________________
Version Information
Table 1
Manual Code
M211280EN-A
Manual Revisions
Description
November 2010. First version.
Related Manuals
Table 2
Manual Code
M210185EN
M210297EN
M210316EN
M211060EN
Related Manuals
Manual Name
Humidity Calibrator HMK15 User's Guide
Hand-held Humidity and Temperature Meter
HM70 User's Guide
HMI41 Indicator and HMP41/45/46 Probes
Operating Manual
HMP60/110 Probe User's Guide
Documentation Conventions
Throughout the manual, important safety considerations are highlighted
as follows:
WARNING Warning alerts you to a serious hazard. If you do not read and follow
instructions very carefully at this point, there is a risk of injury or even
death.
CAUTION
Caution warns you of a potential hazard. If you do not read and follow
instructions carefully at this point, the product could be damaged or
important data could be lost.
NOTE
Note highlights important information on using the product.
8 ___________________________________________________________________ M211280EN-A
Chapter 1 ________________________________________________________ General Information
Safety
The Humidity and Temperature Transmitter HMT130 delivered to you
has been tested for safety and approved as shipped from the factory. Note
the following precautions:
CAUTION
Do not modify the unit. Improper modification can damage the product
or lead to malfunction.
ESD Protection
Electrostatic Discharge (ESD) can cause immediate or latent damage to
electronic circuits. Vaisala products are adequately protected against
ESD for their intended use. However, it is possible to damage the product
by delivering electrostatic discharges when touching, removing, or
inserting any objects inside the equipment housing.
To make sure you are not delivering high static voltages yourself:
- Handle ESD sensitive components on a properly grounded and
protected ESD workbench. When this is not possible, ground yourself
to the equipment chassis before touching the boards. Ground yourself
with a wrist strap and a resistive connection cord. When neither of the
above is possible, touch a conductive part of the equipment chassis
with your other hand before touching the boards.
- Always hold the boards by the edges and avoid touching the
component contacts.
Recycling
Recycle all applicable material.
Dispose of batteries and the unit according to statutory regulations. Do
not dispose of with regular household refuse.
VAISALA ________________________________________________________________________ 9
User's Guide ______________________________________________________________________
Regulatory Compliances
Vaisala HUMICAP® Humidity and Temperature Transmitter Series
HMT130 is in conformity with the provisions of the following EU
directives:
-
EMC-Directive (2004/108/EC)
Conformity is shown by compliance with the following standards:
- EN 61326-1: Electrical equipment for measurement, control and
laboratory use – EMC requirements – for use in industrial locations.
- EN 55022 + Am1: Information technology equipment – Radio
disturbance characteristics – Limits and methods of measurement.
Patent Notice
The HMT130 is protected by the following patents and their
corresponding national rights:
Finnish patent 98861, French patent 6650303, German patent 69418174,
Japanese patent 3585973, UK patent 0665303, U.S. patent 5607564.
Trademarks
HUMICAP is a registered trademark of Vaisala Oyj.
License Agreement
All rights to any software are held by Vaisala or third parties. The
customer is allowed to use the software only to the extent that is provided
by the applicable supply contract or Software License Agreement.
10 __________________________________________________________________ M211280EN-A
Chapter 1 ________________________________________________________ General Information
Warranty
For certain products Vaisala normally gives a limited one-year warranty.
Visit our Internet pages for more information and our standard warranty
terms and conditions: www.vaisala.com/services/warranty.html.
For certain products Vaisala normally gives a limited one-year warranty.
Please observe that any such warranty may not be valid in case of
damage due to normal wear and tear, exceptional operating conditions,
negligent handling or installation, or unauthorized modifications. Please
see the applicable supply contract or Conditions of Sale for details of the
warranty for each product.
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User's Guide ______________________________________________________________________
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12 __________________________________________________________________ M211280EN-A
Chapter 2 __________________________________________________________ Product Overview
CHAPTER 2
PRODUCT OVERVIEW
Thank you for choosing the Vaisala HUMICAP® Humidity and
Temperature Transmitter Series HMT130. This chapter introduces you to
its features.
The Vaisala range of relative humidity measurement instruments covers
all the applications from ventilation to process control in demanding
conditions. For more information about other Vaisala relative humidity
instruments, please contact your Vaisala representative or visit
www.vaisala.com.
Introduction to the HMT130
The Vaisala HUMICAP® Humidity and Temperature Transmitter Series
HMT130 measures relative humidity and temperature and outputs the
measurements to voltage outputs and RS-485. Other quantities, such as
dewpoint (Td) can be calculated from the basic RH and T values
according to the device configuration. HMT130 is powered with a
10 ... 35 VDC or a 24 VAC supply (15 ... 35 VDC or 24 VAC required
when using 0 ... 10 V output). It outputs two analog voltage signals with
nominal 0 ... 10 V range. HMT130 has also an RS-485 digital interface
and a relay.
HMT130 transmitter's output quantities are configurable. Available
quantities for outputs are limited to two at the time. These two quantities
can be used freely at any outputs (display, service port and voltage
outputs).
Available quantities are RH, T, Td, Td/f, a, x, h, Tw, pws and pw.
The default output quantities are set at the factory during order time.
These factory preset quantity selections can be changed afterwards via
the service port if necessary.
The HMT130T and HMT130H models are single-parameter transmitters.
The only output quantity of HMT130T is temperature. The output of the
HMT130H can be configured to be any one of the humidity-related
quantities (RH, Td, Td/f, a, x, h, Tw, pws and pw).
VAISALA _______________________________________________________________________ 13
User's Guide ______________________________________________________________________
Accessories
The following accessories are optionally available:
-
Duct installation kit
Rain shield with installation kit
Rain/solar radiation shield installation kit (for pole installation)
Probe mounting flange
Probe mounting clamp
Constant output probe (HMP110REF, gives constant RH and T
values)
Fixed and Remote Probe Models
The HMT130 is available either with a fixed probe directly attached to
the transmitter housing or a remote probe with different (3/5/10m) cable
lengths. All extension cables can be easily cascaded in order to obtain
longer reach; see Options and Accessories on page 81.
Optional Display
The HMT130 is also available with an optional graphical 128*64
resolution LCD display. The display shows the measurement results of
selected parameters in selected units (defined at the time of ordering).
The parameters are displayed simultaeously at two separate rows on the
display.
Interchangeable Probe
The HMP110 relative humidity probe used in the HMT130 transmitter is
fully interchangeable. You can easily remove the probe and replace it
with a new one without having to adjust the transmitter. You have the
following options when purchasing a new probe from Vaisala:
- Order a new probe and keep your current one.
- Order a new probe and return the old one to Vaisala (replacement
probe).
NOTE
Only probes that have a compatible digital output (VDIGI mode) can be
used with HMT130 transmitter. Compatible probes have the letter "V" as
the first letter in their order code. The order code is written on the probe.
14 __________________________________________________________________ M211280EN-A
Chapter 2 __________________________________________________________ Product Overview
Constant Output Probe
The constant output probe is a testing accessory that can be used to check
transmitter's functions and measurement signal transfer chain all the way
to the control system. The constant output probe does not measure
humidity and temperature; instead, it outputs constant humidity and
temperature readings.
The values output by the constant output probe are specified when
ordering. These values are written on an additional label on the probe
body.
The procedure for using the constant output probe is simply to replace
the original probe for the duration of the testing:
1.
2.
3.
4.
NOTE
Disconnect the normal probe from transmitter.
Connect the constant output probe to the transmitter.
Check that all used outputs (analog, display, serial line) show the
correct measurement values.
After checking the outputs, disconnect the constant output probe
and reconnect the original probe.
The transmitter goes to the error state for a short time when the probe is
changed. This is normal.
VAISALA _______________________________________________________________________ 15
User's Guide ______________________________________________________________________
Transmitter Components
Figure 1 below illustrates the main features of HMT130. On the left is a
remote probe model without display, and on the right is a fixed probe
model with the optional display. The numbers and arrows indicate the
main components of the transmitters.
1007-001
Figure 1
HMT130 Components
The following numbers refer to Figure 1 above:
1
2
3
4
5
=
=
=
=
=
Transmitter enclosure
Cable bushing: cable gland, cable grommet, or conduit fitting.
Probe cable
HMP110 probe
Plastic grid filter
See section Options and Accessories on page 81 for accessory parts and
their numbers.
16 __________________________________________________________________ M211280EN-A
Chapter 3 _______________________________________________________________ Installation
CHAPTER 3
INSTALLATION
Mounting
Wall Mounting
1.
2.
Open the HMT130 cover by pushing the releasing button at the
bottom of the transmitter housing and gently pulling the bottom
part of the cover towards yourself.
Make sure that the HMT130 Humidity and Temperature
Transmitter is correctly aligned and attach it directly to the wall
with up to four screws (not included in the package).
91
78
92
1011-160
Figure 2
HMT130 Wall Mounting
VAISALA _______________________________________________________________________ 17
User's Guide ______________________________________________________________________
NOTE
Select the size and type of the fastening screws according to the wall
material (wood, stone, etc.). Even though using all four screws is
strongly recommended, the HMT130 enclosure fastening holes are
initially covered with a thin plastic membrane, so less than four screws
could be also be used without sacrificing the ingress protection (IP) class
of the enclosure. The diameter of the fastening screws is typically
between 3.5 and 4mm.
Installation with Rain Shield
The installation kit with rain shield includes a metal mounting plate and
a rain shield for the transmitter. Vaisala order code: 215109.
1
3
2
1011-161
Figure 3
1.
2.
3.
HMT130 Installation with Rain Shield
Fasten the metal mounting plate to the wall or pole with screws
(see Figure 3 above). Note the arrow on the mounting plate. Attach
the mounting plate with the arrow pointing upwards.
Drill holes for the screws in the HMT130 frame, and fasten
HMT130 Humidity and Temperature Transmitter to the metal
mounting plate with four (M4) screws.
Fasten the rain shield to the metal mounting plate with two (M6)
mounting screws.
18 __________________________________________________________________ M211280EN-A
Chapter 3 _______________________________________________________________ Installation
Installation with Radiation Shield
DTR502 with probe installation kit includes a rain/solar radiation shield
DTR502 and a plastic installation support for the humidity probe. Vaisala
order code: DTR502B. If you already have the DTR502 shield and need
only the installation support for the probe, it is available with Vaisala
order code 210623.
1.
2.
3.
Fasten the probe to the installation support with two cable ties
(items 3 and 4 in Figure 4 below).
Insert and attach the support to the radiation shield by tightening
the plastic nut (2).
Attach the entire radiation shield/probe assembly to a pole mast
(pole mast diameter: 30 ... 60 mm/1.2 ... 2.3") with the U-bolt and
support arm.
1
6
2
5
3
4
0505-248
Figure 4
Installation of the Probe with Radiation Shield
The following numbers refer to Figure 4 above:
1
2
3, 4
5
6
=
=
=
=
=
DTR502
Plastics nut
Cable tie
Adapter DRW213054 (installation support)
Probe
VAISALA _______________________________________________________________________ 19
User's Guide ______________________________________________________________________
Duct Installation Kit
The duct installation kit includes a plastic pipe with a flange (Vaisala
order code: 215619). To install the HMP110 probe with the duct
installation kit, drill a hole to the duct wall, assemble the probe to the
duct installation kit, slide the probe head through the hole, and attach the
flange to the duct wall with four screws. See section Probe Assembly
with Duct Installation Kit on page 21 for details.
24
1
L
0505-176
Figure 5
Probe Installation with the Duct Installation Kit
The following explanations refer to Figure 5 above:
1
=
Tension screw
Distance L can be adjusted and locked in place with the tension screw.
20 __________________________________________________________________ M211280EN-A
Chapter 3 _______________________________________________________________ Installation
Probe Assembly with Duct Installation Kit
1
2
3
0505-177
Figure 6
Assembly of the Probe with Duct Installation Kit
The following numbers refer to Figure 6 above:
1
2
3
1.
2.
3.
=
=
=
HMP110
Duct installation kit
Probe cable
Slide the probe cable through the duct installation kit plastic pipe.
Attach the probe cable to the HMP110 Humidity Probe.
Attach probe assembly to the duct.
Drilling Instructions for Duct Installation Kit
.2
Ø3
42
4
Ø2
3
2
1
0505-178
Figure 7
Drilling Instructions
The following numbers refer to Figure 7 above:
1
2
3
=
=
=
Mounting screw
Tension screw
HMP110 assembled in duct installation kit plastic pipe
VAISALA _______________________________________________________________________ 21
User's Guide ______________________________________________________________________
Drill the holes for the duct installation kit as follows:
1.
2.
Use a 24-mm drill bit to drill a hole to the duct wall for the
humidity probe.
Drill holes for the duct installation kit mounting screws around the
hole in a square arrangement, 42 mm apart from each other. Use a
3.2-mm drill bit to drill the holes for the mounting screws (four
ST4.2×16-C-Z DIN 7981 screws).
Probe Mounting Flange
The probe mounting flange (Vaisala order code: 226061) is a general
purpose mounting flange for 12 mm diameter probes. It can be used to
hold the HMP110 probe in a through-wall installation.
NOTE
The coaxial silicone plug that is delivered with the flange is not suitable
for use with the probe cable of the HMT130.
0911-109
Figure 8
Optional Probe Mounting Flange
22 __________________________________________________________________ M211280EN-A
Chapter 3 _______________________________________________________________ Installation
Probe Mounting Clamp
The optional mounting clamp (Vaisala order code: 226067) makes it easy
to install the probe on the wall of the measurement environment. The
probe can be detached for calibration simply by loosening the lower
screw.
Installing the entire probe in the measurement environment prevents heat
conduction to the sensor, and is the recommended installation method.
1001-138
Figure 9
CAUTION
Optional Probe Mounting Clamp
Attaching the probe mounting clamp to a conductive wall material
should be avoided, since the potential galvanic connection to the power
supplies and uncontrolled earth current loops could cause measurement
errors or even damage to the HMT130 transmitter
VAISALA _______________________________________________________________________ 23
User's Guide ______________________________________________________________________
Connections
1
C
A
L
2
RH
T
ADJ
3
+
CH1
SGND
4
CH2
-
485 TERM
485+
VIN +
485-
VIN –
SERVICE PORT
SHIELD
5
GND
REL
6
7
8
9
1011-162
Figure 10
HMT130 Component Board
The following numbers refer to Figure 10 above:
1
2
3
4
5
6
7
8
9
=
=
=
=
=
=
=
=
=
Optional LCD display
Indicator LEDs
Adjustment buttons
RS-485 bus termination switch
Service port
Relay terminals
RS-485 bus
Analog outputs
Power supply connectors
24 __________________________________________________________________ M211280EN-A
Chapter 3 _______________________________________________________________ Installation
-
V
VIN+
Close the cover by keeping it slightly tilted and first attaching it to
the fixing snaps at the top of the enclosure base and then pushing
the lower part of the cover firmly forward until it locks. The
transmitter is ready for use.
SGND
5.
VIN-
4.
SHIELD
3.
CH2
2.
Open the transmitter cover by pressing the releasing button at the
bottom side of the transmitter.
Insert the signal wires through the selected cable gland/conduit
fitting in the bottom of the transmitter or alternatively through the
rubber grommet at the back side of the transmitter.
Connect the wires as indicated in Figure 11, Figure 12, and in
Table 3 below. Suitable wire size is between 0.5mm2 and 1.5mm2.
Switch on the RS-485 bus termination switch if necessary. For
more information on the RS-485 bus termination switch see section
CH1
1.
+
10 ... 35 VDC
24 VAC
V
1011-163
Figure 11
NOTE
Power Supply And Voltage Outputs
15 ... 35 VDC or 24 VAC is needed when using the 0 ... 10 V output.
VAISALA _______________________________________________________________________ 25
User's Guide ______________________________________________________________________
7
485-
8
485+
9
GND
10
REL
11
1011-164
Figure 12
Serial Communication and Relay
Table 3
Wiring Table
Terminal
1
2
3
4
5
6
7
8
9
10
11
Description
SGND (signal ground)
CH1+ (signal +)
CH2+ (signal +)
Cable shield (optional)
Vin- (power supply - or VAC)
Vin+ (power supply + or VAC)
485485+
GND (ground)
Relay
Relay
Numbers 1 ... 6 in the first column of the wiring table refer to Figure 11
on page 25 and numbers 7 ... 11 to Figure 12 above.
RS-485 Bus Termination
If you use RS-485 to connect just one HMT130 to a master computer,
enable the internal termination of HMT130 by switching switches 1 and
2 ON. Make sure that the master's end of the line is also terminated (by
using master's internal termination or with a separate terminator).
If you are connecting many transmitters to the same RS-485 bus, make
sure that switches 1 and 2 are OFF and terminate the bus with separate
terminators at both ends. This allows removing any transmitter without
blocking the bus operation.
26 __________________________________________________________________ M211280EN-A
Chapter 4 ________________________________________________________________ Operation
CHAPTER 4
OPERATION
This chapter contains information that is needed to operate the HMT130.
Using the Service Port
HMT130 motherboard has an 8-pin RJ-45 connector for service use.
Service port uses RS-232 signaling levels. Vaisala offers an optional
USB cable (Vaisala order code 219685) for connecting the transmitter to
your PC.
NOTE
The service port is intended for short-term use such as calibration. For
permanent installation, use the analog output or the RS-485 serial line.
Connecting a PC to the service port may cause erroneous analog output
because of a possible ground loop. Use the service port for service only,
and disconnect the PC after the service operation.
The cable can also provide operation power to the transmitter, so the
wires at the screw terminals need not to be connected in order to operate
the transmitter.
If you have not used the HMT130 USB cable before, install the driver
that came with the cable. Refer to section Installing the Driver for the
USB Cable below for detailed instructions.
Installing the Driver for the USB Cable
Before taking the USB cable into use, you must install the provided USB
driver on your PC. When installing the driver, you must acknowledge
any security prompts that may appear. The driver is compatible with
Windows 2000, Windows XP, Windows Server 2003, and Windows
Vista.
1.
Check that the USB cable is not connected. Disconnect the cable if
you have already connected it.
VAISALA _______________________________________________________________________ 27
User's Guide ______________________________________________________________________
2.
Insert the media that came with the cable, or download the driver
from www.vaisala.com.
3.
Execute the USB driver installation program (setup.exe), and
accept the installation defaults. The installation of the driver may
take several minutes.
4.
After the driver has been installed, connect the USB cable to a USB
port on your PC. Windows will detect the new device, and use the
driver automatically.
5.
The installation has reserved a COM port for the cable. Verify the
port number, and the status of the cable, using the Vaisala USB
Instrument Finder program that has been installed in the
Windows Start menu.
Windows will recognize each individual cable as a different device, and
reserve a new COM port. Remember to use the correct port in the
settings of your terminal program.
There is no reason to uninstall the driver for normal use. However, if you
wish to remove the driver files and all Vaisala USB cable devices, you
can do so by uninstalling the entry for Vaisala USB Instrument Driver
from the Add or Remove Programs (Programs and Features in
Windows Vista) in the Windows Control Panel.
Terminal Application Settings
The default settings of the HMT130 serial interface are presented in
Table 4.
Table 4
Property
Baud rate
Parity
Data bits
Stop bits
Flow control
Default Serial Interface Setting
Value
19200
None
8
1
None
The steps below describe how to connect to the HMT130 using the
PuTTY terminal application for Windows (available for download at
www.vaisala.com) and the USB serial interface cable:
1.
2.
Connect the USB cable between your PC and the service port of the
HMT130.
Start the PuTTY application.
28 __________________________________________________________________ M211280EN-A
Chapter 4 ________________________________________________________________ Operation
3.
4.
5.
6.
Select the Serial settings category, and check that the correct COM
port is selected in the Serial line to connect to field.
Note: You can check which port the USB cable is using with the
Vaisala USB Instrument Finder program that has been installed
in the Windows Start menu.
Check that the other serial settings are correct for your connection,
and change if necessary. Flow control should be set to None unless
you have a reason to change it.
Click the Open button to open the connection window and start
using the serial line.
Note: If PuTTY is unable to open the serial port you selected, it
will show you an error message instead. If this happens, restart
PuTTY and check the settings.
You may need to adjust the Local echo setting in the Terminal
category to see what you are typing on the serial line. To access the
configuration screen while a session is running, click the right
mouse button over the session window, and select Change
Settings... from the pop-up menu.
0807-004
Figure 13 PuTTY Terminal Application
VAISALA _______________________________________________________________________ 29
User's Guide ______________________________________________________________________
List of Serial Commands
All commands can be issued either in uppercase or lowercase. The
notation <cr> refers to pressing the carriage return (ENTER) key on your
computer keyboard. Enter a <cr> to clear the command buffer before
starting to enter commands.
Whenever you change any of the parameters and want to store the
changes permanently, use the SAVE command.
Table 5
Command
?
??
ACAL
ADDR
AERR
AMODE
AOUT
ASEL
ATEST
CALCS
CDATE
CLOSE
CRH
CRHCLR
CT
CTCLR
CTEXT
DSEL
ECHO
ENV
ERRS
FORM FRESTORE
HELP
INTV
OPEN
R
RESET
RESTORE
RMODE
ROUT
RSEL
S
SAVE
SDELAY
SEND
SERI
SERI2
SMODE
SYSTEM
UNIT VERS
Serial Port Commands
Description
Show transmitter information
Show transmitter information (POLL mode)
Calibrate analog outputs
Set/show device address
Set/show analog output error levels
Set/show analog output mode
Show analog output status
Set/show analog output quantities and scaling
Test analog outputs
Set/show measured quantities
Set/show calibration date
Start POLL mode
Calibrate probe RH
Restore probe RH factory calibration
Calibrate probe T
Restore probe T factory calibration
Set/show calibration info
Set/show displayed quantities
Set/show terminal echo mode
Set/show environmental parameters
Display active errors
Set/show output formatting
Restore all transmitter settings to factory defaults
List available commands
Set/show the continuous output interval
Stop POLL mode
Start continuous outputting
Reset transmitter
Restores the latest saved settings
Set/show relay operating mode
Show all relay-related parameters
Set/show relay quantity
Stop continuous outputting
Save changed settings to FLASH memory
Set/show RS-485 turnaround time for User Port
Output the reading once
Set/show Port settings (Default: 19200 N 8 1)
Set/show User Port settings (Default: 19200 N 8 1)
Set the serial interface mode
Show transmitter information and build date
Set/show output unit
Show firmware version of the transmitter
30 __________________________________________________________________ M211280EN-A
Chapter 4 ________________________________________________________________ Operation
Device Information and Status
Show Device Information
The ? command outputs a listing of device information.
?<cr>
Example:
>?
Device Name
SW Name
SW model
SW version
Serial number
Address
Unit
Ch1 Status
Ch2 Status
Probe name
Probe SW
Probe SW date
Probe SN
>
:
:
:
:
:
:
:
:
:
:
:
:
:
HMT130
HMT120/130
HMT130
0.9.3.389
"F2220101"
0
METRIC
ON
ON
"HMP110"
"1.01.1"
""
"F0740011"
Set/Show Available Quantities
The CALCS command shows the abbreviations of the quantities
measured by HMT130. The command can also be used to select the
desired quantities for measurement. Only after the quantities have been
set with the CALCS command, can these quantities be selected for
different outputs (see commands DSEL, ASEL, and FORM). The
quantities in DSEL, ASEL, RSEL, and FORM must match with
CALCS.
CALCS [q1 q2]<cr>
Where
q1, q2
=
Any two of the allowed quantity parameters, i.e. RH, T,
TD, TDF, A, X, H, TW, PWS, PW
Examples:
>calcs
RH Td
>
calcs td t
>
VAISALA _______________________________________________________________________ 31
User's Guide ______________________________________________________________________
NOTE
Single-parameter transmitters HMT130H and HMT130T have only one
quantity (T for HMT130T, and RH, TD, TDF, A, X, H, TW, PWS, PW
for HMT130H.)
Set/Show Calibration Date
Use the CDATE command to show or set the calibration date field.
(Calibration refers to the calibration of the HMT130's analog outputs.)
CDATE [date]<cr>
where
date
=
Calibration date in format yyyy-mm-dd
Examples:
>cdate
Calibrated
>
: "NOT SET"
>cdate 2009-06-22
Calibrated
>
: "2009-06-22"
Set/Show Calibration Information
Use the CTEXT command to show or set the calibration info field.
(Calibration refers to the calibration of the HMT130's analog outputs.)
CTEXT [location]<cr>
where
location
= Freely defined text string typically indicating the
calibration location
Examples:
>ctext
Calib. info: "VAISALA HELSINKI"
>
>ctext "Calibration lab 2"
Calib. info: "Calibration lab 2"
>
32 __________________________________________________________________ M211280EN-A
Chapter 4 ________________________________________________________________ Operation
Show Analog Output Status
The AOUT command shows the following information:
-
-
Analog out mode is the output mode for the channel, for example
0 ... 10 V.
Error level is the level that the analog output is set to in case of
transmitter error.
Status indicates the current status of the channel. The statuses are
ON: Normal measurement operation.
OFF: No quantity selected for the channel using the ASEL
command. See section Set/Show Analog Output Quantity and
Scaling on page 42.
ERROR: Transmitter error, channel set to error level.
TEST: Analog channel being tested using the ATEST
command. See section Test Analog Outputs on page 44.
AOUT<cr>
Example:
>aout
*** ANALOG OUTPUT 1
Ch1 Analog out mode
Ch1 Error level
Ch1 Quantity
Ch1 Status
RH lo
RH hi
RH
Ch1 Voltage
*** ANALOG OUTPUT 2
Ch2 Analog out mode
Ch2 Error level
Ch2 Quantity
Ch2 Status
T lo
T hi
T
Ch2 Voltage
>
***
: 0_10V
: 10.8
: RH
: ON
: 0
: 100
: 36.64 %
: 3.66 V
***
: 0_10V
: 10.8
: T
: ON
: -60
: 100
: 23.85 'C
: 5.24 V
VAISALA _______________________________________________________________________ 33
User's Guide ______________________________________________________________________
Show System Information
SYSTEM<cr>
Example:
>system
Device Name
SW Name
SW model
SW version
Serial number
>
:
:
:
:
:
HMT130
HMT120/130
HMT130
1.0.0.500
A1234567
Show Firmware Version
VERS<cr>
Example:
>vers
HMT130 / 0.1.0.103
>
Serial Line Output Commands
Start Continuous Outputting
Use the R command to start the continuous outputting of measurement
values as an ASCII text string to the serial line. The output always
includes the readings of the currently selected analog output quantities.
R [X]<cr>
Example:
>r
RH= 25.10% T= 24.77'C
RH= 25.12% T= 24.96'C
…
Outputting the results continues in intervals issued with the command
INTV. You can stop the output by entering the S command.
Output data formatting can be defined with FORM command. With X
parameter the transmitter will output RH + T value in predefined format
regardless of what quantities are selected.
34 __________________________________________________________________ M211280EN-A
Chapter 4 ________________________________________________________________ Operation
Stop Continuous Outputting
Use the S command to stop the continuous measurement output:
S<cr>
Set/Show Output Interval
Use the INTV command to show or set the output interval of the serial
line measurement messages (applies when R command or RUN mode is
used). The shortest output interval is one second. This command has no
effect on the operation of the analog outputs.
INTV [n xxx]<cr>
where
n
xxx
=
=
Time interval in range 1 ... 255
Time unit = "S", "MIN", or "H"
Examples:
>intv
Value
Unit
>
: 1
: S
>intv 3 min
Value
Unit
>
: 3
: MIN
Output a Reading Once
Use the SEND command to output a single measurement reading from
the transmitter.
SEND [X]<cr>
Example:
>send
RH= 25.12 % T= 24.91 'C
>
With X parameter the transmitter will output RH + T value in predefined
format regardless of what quantities are selected.
VAISALA _______________________________________________________________________ 35
User's Guide ______________________________________________________________________
Calibration Commands
Serial commands that are related to calibration are described below. For
the actual calibration procedures, see section Calibration and
Adjustment on page 58.
Calibrate Humidity Measurement
Use the CRH command to perform a one-point or two-point humidity
(RH) calibration.
CRH<cr>
When performing a one-point calibration, you need to place the probe in
a single humidity reference with RH < 50%. Run the command and enter
the exact RH of the reference after the measurement has stabilized. Exit
the command by pressing the ESC key before proceeding to the second
point (see example below). To update the value, press ENTER without
inputting a value.
For two-point calibration, the first point requires a RH < 35% humidity
reference, the second point must be RH > 50%.
Example 1: One-point calibration
>crh
RH:
11.29915720 Ref1 ? 11.3
Press ENTER to continue or ESC to exit
OK
>
Example 2: Two-point calibration
>crh
RH:
11.29915720 Ref1 ? 11.3
Press ENTER to continue or ESC to exit
RH:
75.04306440 Ref2 ? 75
OK
>
Example 3: No calibration, only updating the value
>crh
RH:
20.28000200 Ref1 ?
RH:
20.14000000 Ref1 ?
Calibration terminated with ESC
>
36 __________________________________________________________________ M211280EN-A
Chapter 4 ________________________________________________________________ Operation
Restore Probe RH Factory Calibration
Use the CRHCLR to restore the probe RH factory calibration.
CRHCLR<cr>
Example:
>crhclr
OK
>
Calibrate Temperature Measurement
Use the CT command to perform a one-point or two-point temperature
(T) calibration.
CT<cr>
When performing a one-point calibration, you need to place the probe in
a single temperature reference. Run the command and enter the exact
temperature of the reference after the measurement has stabilized. Exit
the command by pressing the ESC key before proceeding to the second
point. To update the value, press ENTER without inputting a value.
For two-point calibration, the second reference point must be at least
20 ºC warmer than the first. The measurement reading for the second
point will appear when this requirement is met.
Example 1: One-point calibration
>ct
T 21.9827 Ref1 ? 22
Press ENTER to continue or ESC to exit
OK
>
Example 2: Two-point calibration
>ct
T 22.0007 Ref1 ? 22
Press ENTER to continue or ESC to exit
T 44.9847 Ref2 ? 45
OK
>
Example 3: No calibration, only updating the value
>ct
T 22.0007 Ref1 ?
T 22.0145 Ref1 ?
Calibration terminated with ESC
>
VAISALA _______________________________________________________________________ 37
User's Guide ______________________________________________________________________
Restore Probe T Factory Calibration
Use the CTCLR to restore the probe T factory calibration.
CTCLR<cr>
Example:
>ctclr
OK
>
Calibrate Analog Output
Use the ACAL command to calibrate the analog voltage outputs.
ACAL<cr>
After you give this command, the CH1 analog output of the transmitter
is set to the low limit (0V). Measure the output and enter the measured
value. After entering the low limit, you must measure and enter the high
limit also (for example 10V, depends on the output mode of the
channel). The same procedure is then repeated with CH2.
Calculated coefficients are printed after the measured values are given.
Example:
>acal
Ch1 V1 (V) ? 0.11
Ch1 V2 (V) ? 10.21
1.92308600E+02 a0
2.58811860E+03 a1
OK
Ch2 V1 (V) ? 0.11
Ch2 V2 (V) ? 10.20
1.92024420E+02 a0
2.59068400E+03 a1
OK
NOTE
Question mark is displayed after certain stabilization time has expired.
Values should be entered only after question mark is displayed. Values
entered before question mark will be discarded.
38 __________________________________________________________________ M211280EN-A
Chapter 4 ________________________________________________________________ Operation
Configuring Serial Line Operation
Set/Show Serial Line Settings
Use the SERI command to show or set the serial line settings for the
serial port that you are currently using (service port or user port).
Use the SAVE command after changing the settings to store them. The
new settings will be taken into use when the transmitter is reset or
powered up.
SERI [b p d s]<cr>
where
b
p
d
s
=
=
=
=
baud rate (9600, 19200, 38400, 76800, 115200)
parity (n = none, e = even, o = odd)
data bits (7 or 8)
stop bits (1 or 2)
Examples:
>seri
Baud P D S
>
: 19200 N 8 1
>seri 9600 e 7 1
Baud rate
: 9600
Parity
: E
Data bits
: 7
Stop bits
: 1
>save
Saving settings...done
>
Set/Show Terminal Echo
To show or set the terminal echo status, use the ECHO command.
ECHO [ON/OFF]<cr>
Examples:
>echo
COM1 Echo
>
>echo on
COM1 Echo
: OFF
: ON
VAISALA _______________________________________________________________________ 39
User's Guide ______________________________________________________________________
Set/Show Serial Interface Mode
Use the SMODE command to show or set the serial interface mode. Note
that a separate SAVE command is not needed to store the new serial
interface mode setting.
SMODE [STOP/RUN]<cr>
In STOP mode: outputting only when command is issued, any command
can be used.
In RUN mode: outputting automatically, only command S can be used.
Example:
>smode stop
Output mode
>
: STOP
Configuring Measurement Parameters
Set/Show Environmental Parameters
Use the ENV command to show or set the environmental compensation
values. In HMT130, the humidity measurement can be compensated for
ambient pressure. The value set using ENV command is a permanent
value which will survive a restart.
ENV [x.xxxx]<cr>
where
x.xxxx
=
Absolute pressure in the measuring environment.
The default is 1.013. The pressure unit is bar.
Example:
>env
Pressure (bar)
>
: 1.013
>env 0.980
Pressure (bar)
: 0.98
>save
Saving settings...done
>
NOTE
You can use the Vaisala Humidity Calculator to simulate the effect of
pressure change to dewpoint. The Humidity Calculator can be found at:
www.vaisala.com/humiditycalculator
40 __________________________________________________________________ M211280EN-A
Chapter 4 ________________________________________________________________ Operation
Configuring Analog Output
Set/Show Analog Output Mode
Use the AMODE command to show or set the analog output mode.
AMODE [CH1mode CH2mode] [CH1lowlimit CH1highlimit]
[CH2lowlimit CH2highlimit]<cr>
Where
CH1mode
CH2mode
= 0_5V (Output scale 0 … 5V)
0_10V (Output scale 0 … 10V)
X_YV (Output scale lowlimit … highlimit)
CH1lowlimit = Low limit for output voltage
CH2lowlimit
CH1highlimit = High limit for output voltage
CH2highlimit
Example (Channel 1 limits configured as 1 ... 6 volts and Channel 2 as
0 ... 5 volts):
>amode x_yv 0_5V 1 6
Ch1 Analog out mode :
Ch2 Analog out mode :
Ch1 low limit
:
Ch1 high limit
:
>
X_YV
0_5V
1
6
Example (User prompted to accept currently used channel limits or enter
new limits):
>amode x_yv
Ch1 Analog out mode : X_YV
Ch2 Analog out mode : 0_10V ?
Ch1 low limit
: 0 ?
Ch1 high limit
: 10 ? 1
>
VAISALA _______________________________________________________________________ 41
User's Guide ______________________________________________________________________
Set/Show Analog Output Error Levels
Use the AERR command to show or set the analog output error levels.
AERR [level1 level2]<cr>
where
level1 level2 = Error levels for analog output channel
Examples:
>aerr
Ch1 Error level
Ch2 Error level
>
: 0.0
: 0.0
>aerr 10.8 10.8
Ch1 Error level
Ch2 Error level
>
: 10.8
: 10.8
Set/Show Analog Output Quantity and
Scaling
After you have defined the quantities with the CALCS command, use the
ASEL command to show or set the quantity output by the analog
channels, and the scaling that is used. If you do not enter scaling limits,
default values are used. Valid quantities are: RH, T, TD, TDF, A, X, H,
TW, PWS, PW and NONE. NONE parameter disables analog output and
output is forced to error level.
ASEL [q1 q2] [lo1 hi1 lo2 hi2]<cr>
where
q1 q2
lo1 lo2
hi1 hi2
= Analog output channel quantities
= Low limits of scaling
= High limits of scaling
Syntax for single-parameter transmitters:
ASEL [q] [lo hi]<cr>
Where
q
lo
hi
= Analog output channel quantity
= Low limit of scaling
= High limit of scaling
42 __________________________________________________________________ M211280EN-A
Chapter 4 ________________________________________________________________ Operation
Examples:
>asel
Ch1 Quantity
RH lo
RH hi
Ch2 Quantity
T lo
T hi
>
:
:
:
:
:
:
RH
0
100
T
-60
100
>asel rh td
Ch1 Quantity
RH lo
RH hi
Ch2 Quantity
Td lo
Td hi
>
:
:
:
:
:
:
RH
0
100
TD
-40
60
>asel t td 0 60 -20 60
Ch1 Quantity
: T
T lo
: 0
T hi
: 60
Ch2 Quantity
: TD
Td lo
: -20
Td hi
: 60
>
>asel rh none
Ch1 Quantity
RH lo
RH hi
Ch2 Quantity
>
:
:
:
:
>asel none none
Ch1 Quantity
Ch2 Quantity
>
: NONE
: NONE
RH
0
100
NONE
VAISALA _______________________________________________________________________ 43
User's Guide ______________________________________________________________________
Test Analog Outputs
Use the ATEST command to test the analog outputs. The ATEST
command will force the output to the given value, which can then be
measured with a calibrated multimeter.
ATEST command affects only the analog outputs and hence it does not
disable measurement functions. ATEST without parameters will exit the
test mode and let the measurement continue. It will also indicate the the
current analog output levels in normal measurement state.
ATEST [val1 val2]<cr>
where
val1 val2
=
Analog channel output value (V)
Examples:
>atest
CH1: 2.360000
CH2: 3.765010
>
>atest 5.0 5.0
CH1: 5.000000
CH2: 5.000000
>
Configuring Relay Output
Set/Show Relay Quantity
After you have defined the quantities with the CALCS command, use the
RSEL command to show or set the relay quantity. Valid quantity
parameters are RH, T, TD, TDF, A, X, H, TW, PWS and PW.
RSEL [q]<cr>
where
q
= Quantity to define relay state.
Example:
>RSEL T
Relay quantity
: T
44 __________________________________________________________________ M211280EN-A
Chapter 4 ________________________________________________________________ Operation
Set/Show Relay Operating Mode
Use the RMODE command to set/show relay mode, low and high limits.
Relay modes are OFF, LO_OPEN and HI_OPEN. Low and high values
specify relay operation limits for the selected quantity.
RMODE [xxxx] [lo] [hi]<cr>
where
xxxx
lo
hi
= OFF, LO_OPEN or HI_OPEN
= Low limit
= High limit
In OFF mode:
In LO_OPEN
mode:
In HI_OPEN
mode:
relay contacts are always open
relay contacts are opened when the value is below
the set low limit and closed when value is above
the high limit.
relay contacts are opened when the value is above
the set high limit and closed when value is below
the low limit.
Example:
>RMODE LO_OPEN 10 20
Relay mode
: LO_OPEN
Relay low
: 10
Relay high
: 20
Show Relay Settings
Use the ROUT command to show the current relay settings.
ROUT<cr>
Example:
>ROUT
*** RELAY OUTPUT ***
Relay quantity
:
RH
:
Relay mode
:
Relay low
:
Relay high
:
Relay status
:
RH
22.35 %
LO_OPEN
10
20
CLOSED
VAISALA _______________________________________________________________________ 45
User's Guide ______________________________________________________________________
Other Commands
Set/Show Displayed Quantities
After you have defined the quantities with the CALCS command, use the
DSEL command to show or set the displayed quantities. Number of
parameters determine the display mode (ie. one or two rows). If one
quantity is given, display will switch to one row mode. If two quantities
are given, two row mode is used. Valid quantities are: RH, T, TD, TDF,
A, X, H, TW, PWS and PW.
DSEL [q1 q2]<cr>
where
q1 q2
= Quantities to be shown on transmitter display
Syntax for single-parameter transmitters:
DSEL [q]<cr>
where
q
= Quantity to be shown on transmitter display
Examples:
>dsel
1. quantity
2. quantity
>
: RH
: T
>dsel rh t
1. quantity
2. quantity
>
: RH
: T
>dsel t
1. quantity
>
: T
46 __________________________________________________________________ M211280EN-A
Chapter 4 ________________________________________________________________ Operation
Set/Show Output Formatting
After you have defined the quantities with the CALCS command, use the
FORM command to set the output format for SEND and R commands.
FORM [format]<cr>
where
format = A formatting string, which can consist of following fields:
“”
String constant
x.y
Value length modifier. x is numbers before dot
and y is numbers after dot.
Ux
Unit field length. U…U format is also supported.
Q
Quantity name (e.g. rh, t, td etc.)
#t or \t Tabulator
#r or \r Carriage return
#n or \n Line feed (new line)
Note 1. Quantity must be after x.y and Ux modifiers.
Note 2. There must be a space between parameters, #r#n or \r\n is not supported.
Note 3. Max. string length is 80 characters.
Note 4. If Ux parameter is not used, unit is not displayed.
Examples:
>form "RH= " 3.2 U2 rh #r #n
>send
RH= 32.16 %
>
>form "t=" 4.1 U3 t \t "rh=" 3.2 U2 rh \r \n
>send
t= 22.5 'C
rh= 29.12 %
>
>form "t=" 4.1 U3 t \t "rh=" rh \r \n
>send
t= 22.3 'C
rh= 29.5 %
>
>form 3.2 UUU "RH=" rh \t "T=" t \r \n
>send
RH= 27.99 %
T= 23.34 'C
>
>form 3.3 rh " " t \r \n
>send
26.740 23.660
>
>form "->" "RH=" 3.2 U2 rh " " "T=" 3.1 U3 t #r #n
>send
->RH= 27.79 % T= 23.4 'C
>
VAISALA _______________________________________________________________________ 47
User's Guide ______________________________________________________________________
Display Command List
Use the HELP command to display a list of available commands.
HELP<cr>
Display Active Errors
Use the ERRS command to display the currently active error codes. For
troubleshooting active errors, see Table 7 on page 75.
ERRS<cr>
Example (no active errors):
>errs
No errors.
>
Save Changed Settings
Use the SAVE command to save changed settings to the transmitter
FLASH memory. Most settings have to be saved or the changes are lost
at the next reset or power down.
NOTE
The SMODE command saves the new serial mode immediately;
a separate SAVE command is not needed.
The probe calibration commands (CRH, CT, CRHCLR, CTCLR) store
the parameters into the probe's memory automatically without a separate
SAVE command.
SAVE<cr>
Example:
>save
Saving settings...done
>
48 __________________________________________________________________ M211280EN-A
Chapter 4 ________________________________________________________________ Operation
Restore Saved Settings
Use the RESTORE command to restore saved settings from transmitter
FLASH memory to RAM. All unsaved changes will be lost.
RESTORE<cr>
Example:
>restore
Restoring default settings...done
>
Reset Transmitter
Use the RESET command to reset the transmitter. Upon reset or powerup, the transmitter enters the serial mode that has been set with the
SMODE command.
After reset the configuration is loaded from FLASH memory. That
configuration can be altered with SAVE-command.
RESET<cr>
Example (transmitter set to serial mode STOP, will output transmitter
software version at reset):
>reset
HMT130 / 0.1.0.001
Type "help" for command list
>
Restore Factory Settings
Use the FRESTORE command to restore the factory settings to the
transmitter. All user settings, including the user-performed calibration
corrections, will be lost. The transmitter will revert back to the factory
calibrated settings. Note that this only returns the factory settings of the
transmitter and not of the interchangeable probe (see section Restore
Probe RH Factory Calibration on page 37 and section Restore Probe T
Factory Calibration on page 38).
FRESTORE<cr>
Example:
>frestore
Restoring factory defaults...done
>
VAISALA _______________________________________________________________________ 49
User's Guide ______________________________________________________________________
Set/Show Output Unit
Use the UNIT command for output unit selection (metric or non-metric).
UNIT [METRIC/NON_METRIC]<cr>
Example:
>unit
Unit
>
: METRIC
>unit non_metric
Unit
>
: NON_METRIC
Operating the User Port (RS-485)
The RS-485 interface enables communication between RS-485 network
and HMT130 transmitter. The RS-485 interface is not isolated.
Networking Commands
Set the RS-485 interface by using the following commands. The other
serial line commands are presented in section List of Serial Commands
on page 30.
SERI
Use the SERI command to input RS-485 bus settings. This command
affects the serial port where the settings are given (service port or user
port).
SERI [b p d s]<cr>
where
b
=
p
d
s
=
=
=
bit rate (1200, 2400, 4800, 9600, 19200, 38400, 57600,
115200)
parity (n = none, e = even, o = odd)
data bits (7 or 8)
stop bits (1 or 2)
SERI2
The SERI2 command is equivalent to the SERI command, but it affects
only the user port settings. The main purpose of the command is to
change the user port settings via the service port.
SERI2 [b p d s]<cr>
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ECHO
Use the ECHO command to enable/disable echo of characters received
over the serial line.
ECHO [x]<cr>
where
x
=
ON/OFF (default = OFF)
When using 2-wire connection, echo must be always disabled.
SMODE
Use the SMODE command to set the default serial interface mode.
SMODE [xxxx]<cr>
where
xxxx = STOP, RUN or POLL
In STOP mode: measurements output only by command SEND, all
commands can be used
In RUN mode:
outputting automatically, only command S can be
used to stop.
In POLL mode: measurements output only with command SEND
[addr].
When several transmitters are connected to the same line, each
transmitter must be entered an own address in the initial configuration,
and POLL mode must be used.
SDELAY
Use the SDELAY command to set the answer delay (RS-485 turnaround
time) for the User Port.
SDELAY [delay]<cr>
where
delay = RS-485 turnaround time in milliseconds, range 0 ... 1000 ms.
Example:
>sdelay 100
Turnaround time
>
: 100
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User's Guide ______________________________________________________________________
INTV
Use the INTV command to set the RUN mode output interval.
INTV [n xxx]<cr>
where
n =
xxx =
1 - 255
S, MIN or H
This command sets the RUN mode output interval. The time interval is
used only when the RUN mode is active. For example, the output interval
is set to 10 minutes.
>INTV 10 min
Output intrv.
>
:
10 min
Setting RUN output interval to zero enables the fastest possible output
rate.
ADDR
Addresses are required only for POLL mode (see serial line command
SMODE on page 51). Use the ADDR command to input the RS-485
transmitter address.
OPEN [aa]<cr>
where
aa =
address (0 ... 99) (default = 0)
Example: the transmitter is configured to address 99.
>ADDR
Address : 2 ?
>
99
SEND
Use the SEND command to output the reading once in POLL mode:
SEND [aa]<cr>
where
aa =
address of the transmitter
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OPEN
When all transmitters on the RS-485 bus are in POLL mode the OPEN
command sets one transmitter temporarily to STOP mode so that other
commands can be entered.
OPEN [aa]<cr>
where
aa =
address of the transmitter (0 ... 99)
CLOSE
The CLOSE command switches the transmitter back to the POLL mode.
CLOSE<cr>
Example:
>OPEN 2
(opens the line to transmitter 2, other
transmitters stay in POLL mode)
>CRH
...
>CLOSE
(for example, calibration performed)
(line closed)
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Chapter 5 ______________________________________________________________ Maintenance
CHAPTER 5
MAINTENANCE
This chapter provides information that is needed in basic maintenance of
the product.
Replacing the HUMICAP® Sensor
Fixed and Remote Probe Models
1.
2.
3.
4.
Remove the filter (plastic grid or sintered stainless steel).
Remove the damaged sensor and insert a new one.
Recalibrate the probe.
Replace a dirty filter to ensure a maximum lifetime and a fast
response for the sensor. Do not attempt to clean the filter.
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User's Guide ______________________________________________________________________
Removing and Fastening the Probe
Fixed Probe Model
Remove and replace the probe as follows:
1.
Loosen the metal locking bushing by carefully turning it counter
clockwise.
Remove the probe from the transmitter by pulling it gently
downwards.
Attach the new probe to the four pin M8 panel connector at the
transmitter (only one position possible).
Tighten the locking bushing to the M8 panel connector by turning
it clockwise
2.
3.
4.
2
3
1
1011-153
Figure 14
Removing the Humidity Probe (Fixed Probe Model)
The following numbers refer to Figure 14 above:
1
2
3
=
=
=
Locking bushing
Holder bushing (attached permanently to the probe)
HMP110 probe
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Chapter 5 ______________________________________________________________ Maintenance
Remote Probe Model
1.
2.
Unscrew the small sleeve that secures the probe in place at the end
of the probe cable and pull out the probe.
Replace the probe and screw the small sleeve back on, securing the
probe tightly in place.
1
2
3
1011-154
Figure 15
Removing the Humidity Probe (Remote Probe Model)
The following numbers refer to Figure 15 above:
1
2
3
=
=
=
Probe cable
Sleeve securing the probe to the cable
HMP110 probe
VAISALA _______________________________________________________________________ 57
User's Guide ______________________________________________________________________
Calibration and Adjustment
Calibrate and adjust the HMT130 using the push-buttons on the
motherboard, serial line commands, or with portable humidity meters
HM70 or HMI41.
A calibrator kit is needed for calibration against saturated salt solutions.
The HMK15 Humidity Calibrator and pre-measured certified salts are
available from Vaisala. For further information, please contact your
Vaisala representative.
Vaisala Service Centers also offer accredited calibrations for humidity
and temperature. See contact information on page 77.
It is also possible to remove the HMP110 probe and replace it with a new
one. The old probe can be adjusted using another HMT130 transmitter
body, if you have one available.
NOTE
RH Field Calibration and Adjustment, as instructed in the following
pages, is restricted to a certain adjustment range to minimize the effects
of special circumstances, such as chemical contamination. In case the
probe is outside its adjustment/trim range due to, for example, chemical
exposure, the calibration cannot be completed. In this case, it is
recommended that you change the probe or contact Vaisala Services.
HMT130 Push-Button Calibration
1011-155
Figure 16
Adjustment Buttons
Calibration and adjustment of the HMT130 can be done by using the
adjustment buttons found at the transmitter. The two-point humidity
adjustment is carried out by using two relative humidity references: for
example saturated salt points 11 % RH (LiCl) and 75 % RH (NaCl). The
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Chapter 5 ______________________________________________________________ Maintenance
difference between the two humidity reference points must be at least 30
%RH. The difference between the two temperature reference points must
be at least 30 °C.
NOTE
In push-button calibration, the transmitter outputs are by default relative
humidity in the range 0…100% RH in CH1 and temperature in the range
-40…+60°C in CH2 regardless what the actual transmitter settings are.
Outputs mean in this case both the display and analog current outputs.
Humidity and Temperature Adjustment
To make a humidity or temperature adjustment (the same instructions
apply to both one-point and two-point calibration):
1.
2.
3.
NOTE
If you do not wish to perform the RH adjustment at this time, press ADJ
button one more time. The green indicator LED turns off and the red
indicator LED begins to blink slowly (800ms cycle time) to indicate T
calibration state. Now you can continue following the instructions from
step 7 onwards.
4.
NOTE
Open the transmitter cover and you can see three buttons
marked ADJ, + and -. There are also two indicator LEDs, one
green and one red on the HMT130 motherboard.
Press the ADJ button and hold it down until the green indicator
LED begins to blink slowly (800ms cycle time).
HMT130 transmitter is now in RH calibration state. Analog output
and optional display will still follow the actual measured RH value.
Remove the filter and insert the probe into a measurement hole of
the dry end reference chamber (for example, LiCl: 11 % RH) to do
the low humidity offset adjustment.
Do not touch the adjustment buttons before the conditions have
stabilized. This takes approximately 30 minutes.
5.
Press either the - or + button at least once, make sure that the Uout
voltage is correct, adjust using the - and + buttons if needed, and
press the ADJ button again. The green indicator LED begins to
blink faster (400ms cycle time).
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User's Guide ______________________________________________________________________
NOTE
If you do not wish to perform the two-point RH adjustment at this time,
press the ADJ button one more time. The green indicator LED turns off
and the red indicator LED begins to blink slowly (800ms cycle time) to
indicate T calibration state. Now you can continue following the
instructions from step 7 onwards.
If one-point calibration is done at more than 50% RH, a gain adjustment
is done instead of an offset adjustment.
NOTE
6.
Insert the probe into the high end reference chamber (for example,
NaCl: 75 % RH chamber in the humidity calibrator HMK15) and
do the high humidity gain adjustment by using the - and + buttons
to make sure the Uout voltage is correct (you have to press either or + at least once even if the value is correct). To finish the RH
calibration, press the ADJ button. The green LED is now turned off
and the red indicator LED begins to blink slowly (800ms cycle
time).
7.
HMT130 transmitter is now in T calibration state. Analog output
and optional display will still follow the actual measured T value.
If you do not wish to perform the T adjustment at this time, press ADJ
button one more time. The red indicator LED is turned off and the
transmitter returns to normal mode. The calibration procedure is now
finished.
8.
NOTE
Do not touch the adjustment buttons before the conditions have
stabilized.
9.
NOTE
Insert the probe into a known reference temperature (if Vaisala
Humidity Calibrator HMK15 is not used) and let the temperature
reading stabilize.
Using the - and + buttons, make the temperature offset adjustment
by making sure the Uout voltage is correct (you have to press either
- or + at least once even if the value is correct) and press the ADJ
button. The red indicator LED begins to blink faster (400ms cycle
time).
If you do not wish to perform the two-point T adjustment at this time,
press the ADJ button one more time. The red indicator LED is turned
off and the transmitter returns to normal mode. The calibration
procedure is now finished.
10.
Insert the probe into another reference temperature.
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NOTE
Do not touch the adjustment buttons before the conditions have
stabilized.
11.
12.
Using the - and + buttons, make the temperature gain adjustment
by making sure the Uout voltage is correct (you have to press either
- or + at least once even if the value is correct).
Press the ADJ button one more time. The red indicator LED turns
off and the transmitter returns to normal mode. The calibration
procedure is now finished.
NOTE
In case of calibration error, both LEDs blink alternately at a very fast
rate (cycle time 200ms) for a period of 2s after which the transmitter
returns to normal mode.
NOTE
In case of using a HMT130 transmitter with display option, the
following texts are shown at the display during calibration:
"Probe cal: RH 1" corresponding the green LED blinking slowly
"Probe cal: RH 2" corresponding the green LED blinking fast
"Probe cal: T 1" corresponding the red LED blinking slowly
"Probe cal: T 2" corresponding the red LED blinking fast
"Probe cal: Error" corresponding both LEDs blinking alternately at
very fast rate
VAISALA _______________________________________________________________________ 61
User's Guide ______________________________________________________________________
Adjustment with HM70
You can check and adjust the HMT130 relative humidity measurement
with the HM70 Hand-Held Humidity and Temperature meter. A HM70connection cable is needed. Vaisala order code: 211339.
There are four types of adjustments available: field checking and
adjustment using a calibrated reference probe, one-point adjustment
using a calibrator, two-point adjustment using a calibrator, and LiClNaCl adjustment.
Follow the first seven steps and continue according to the chosen
adjustment method.
0505-351
Figure 17
1.
2.
3.
4.
5.
NOTE
Location of the MI70 Probe and Cable Connector
Ports
Connect the 211339 HM70-connection cable to the SERVICE PORT
connector on the HMT130 motherboard (see Figure 10 on page
24).
Connect the other end of the connection cable to either of the
HM70's connector ports located on the bottom of the indicator (see
Figure 17 above).
Turn on both devices (or just HM70, in case that HMT130 is on
continuously).
The reading of the transmitter is shown on the top or middle row of
the indicator display, depending on which connector port the
connection cable is connected to.
Press the ADJ button on the HMT130 motherboard to open the
adjustment mode. Both LEDs on HMT130 motherboard remain in
OFF state and text "Starting adjustment mode for HMP110" is
shown at the MI70 display.
In case of using a HMT130 transmitter with display option the text
"MI70 adjustment mode" is shown at the upper row of HMT130
display.
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NOTE
From this point onward, the local adjustment buttons at HMT130 are
disabled and adjustment is carried out using the MI70 indicator.
HMT130 display and analog outputs will always follow the actual
measured RH/T value when in MI70 adjustment mode. When operating
the MI70, do not press the buttons too quickly or the calibration may
fail. Wait for one second between each press.
6.
7.
Press OK to start adjustment.
Check the environment settings if needed. Otherwise, press NO.
Select RH or T adjustment. Continue according to the directions of the
desired adjustment method.
Field Checking and Adjustment Using a Calibrated
Reference Probe
Follow steps 1 to 7 on page 62 and continue as follows:
8.
Check that the probes are located in equal conditions and wait
until the readings have stabilized (may take 30 minutes or
more). If you are close to the probes, do not breath in their
direction.
9.
Press ADJUST to continue adjusting.
10.
Choose To same as RHI/II from the MI70 adjustment menu, press
SELECT (MI70 automatically recognizes which port the HMP70
series probe is connected to).
11.
Confirm the adjustment by pressing YES.
12.
The adjustment is done. Press BACK and EXIT to return to the
basic display.
13.
Turn off the MI70 and detach the connection cable.
One-Point Adjustment Using a Calibrator
When adjusting the transmitter in only one reference condition, please
take care that the reference condition represents the measuring
environment. MI70 indicator is used now only as a terminal for
visualizing and setting the transmitter's RH reading.
Follow steps 1 to 7 on page 62 and continue as follows:
8.
Remove the filter from the transmitter's probe and insert the
probe head into the reference condition.
9.
Press ADJUST to continue adjusting.
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User's Guide ______________________________________________________________________
10.
Choose 1-point adjustment from the MI70 adjustment menu and
press SELECT.
0505-185
Figure 18 Example of the MI70 Adjustment Menu
11.
Press READY when the reading has stabilized in the reference
condition (may take 30 minutes or more). You can follow the
stabilization from the GRAPH display.
0505-186
Figure 19 Example of the MI70 Adjustment Mode Graph
Display
12.
Enter the correct reference value with the arrow buttons. Press
OK.
13.
Confirm the adjustment by pressing YES.
14.
The adjustment is done. Press BACK and EXIT to return to the
basic display.
15.
Turn off the MI70 and detach the connection cable.
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Two-Point Adjustment Using a Calibrator
Note that the difference between the two reference humidities must be at
least 50 %. MI70 indicator is used now only as a terminal for visualizing
and setting the transmitter's RH reading.
Follow steps 1 to 7 on page 62 and continue as follows:
8.
Remove the filter from the transmitter's probe and insert the
probe head into the lower humidity reference condition.
9.
Press ADJUST to continue adjusting.
10.
Choose 2-point adjustment from the MI70 adjustment menu and
press SELECT.
11.
Press READY when the reading has stabilized in the first reference
condition (may take 30 minutes or more). You can follow the
stabilization from the GRAPH display.
12.
Enter the correct reference value in the first condition with the
arrow buttons. Press OK.
13.
Remove the probe from the first reference condition and insert
the probe head into the higher humidity reference condition.
14.
Press READY when the reading has stabilized in the second
reference condition (may take 30 minutes or more). You can
follow the stabilization from the GRAPH display.
15.
Enter the correct reference value in the second condition with
the arrow buttons. Press OK.
16.
Confirm the adjustment by pressing YES (by pressing NO you
return to adjustment mode display and no changes are made). If
the difference between the two reference conditions is less than
50 %RH, adjustment cannot be done.
17.
The adjustment is done. Press BACK and EXIT to return to the
basic display.
18.
Turn off the MI70 and detach the connection cable.
LiCl-NaCl Adjustment
This adjustment is done using relative humidity references 11.3 % RH
(LiCl) and 75.5 % RH (NaCl).
Follow steps 1 to 7 on page 62 and continue as follows:
8.
Remove the filter from the transmitter's probe and insert the
probe head into the LiCl salt chamber.
9.
Press ADJUST to continue adjusting.
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User's Guide ______________________________________________________________________
10.
Choose LiCl-NaCl autom. from the MI70 adjustment menu and
press SELECT. Press OK to accept the note telling about
references.
11.
Press READY when the reading has stabilized in the LiCl salt
chamber (may take 30 minutes or more). You can follow the
stabilization from the GRAPH display.
12.
Remove the probe from the LiCl salt chamber and insert the
probe head into the NaCl salt chamber.
13.
Press READY when the reading has stabilized in the NaCl salt
chamber (may take 30 minutes or more). You can follow the
stabilization from the GRAPH display.
14.
Confirm the adjustment by pressing YES (by pressing NO you
return to adjustment mode display and no changes are made).
15.
The adjustment is done. Press BACK and EXIT to return to the
basic display.
16.
Turn off the MI70 and detach the connection cable.
Temperature Field Check and Adjustment by Using a
Calibrated Reference Probe
Follow steps 1 to 7 on page 62 and continue as follows:
NOTE
8.
Check that the probes are located in equal conditions and wait
until the readings are stabilized (can take 30 minutes or more). If
you are close to the probes, do not breathe in their direction.
9.
Press ADJUST to continue adjusting.
10.
Press To same as TII/I, press SELECT. (MI70 always recognizes the
port to which the HMP70 series probe is connected).
11.
Confirm by pressing YES.
If the temperature difference between the reference probe and HMT130
is too large, the adjustment cannot be done (HM70 will notify you of
this). The available reserve for T adjustment of HMT130 depends on
the initial temperature calibration of the unit.
12.
Adjustment is done. Press BACK and EXIT to return to the basic
display.
13.
Switch off the MI70 and detach the calibration cable from MI70
and from the transmitter.
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Adjustment with HMI41
You can check and adjust the HMT130 relative humidity measurement
with the HMI41 indicator and HMP41/45/46 probes. A HMI41connection cable is needed. Vaisala order code: 25917ZZ.
There are three adjustment modes available: offset (dry point), gain (wet
point), and two-point adjustment. All of these can be performed using the
HMI41 either as a reference meter (for example when the transmitter is
mounted in an air-conditioning channel) or only as a terminal for
visualizing and setting the transmitter's RH reading.
Offset and gain adjustments are performed the same way and differ only
in internal calculations. Select offset adjustment when the reference
humidity is < 65 %RH and gain adjustment when the reference humidity
is ≥ 65 %RH. Two-point adjustment is more accurate, and includes both
offset and gain corrections. For performing two-point adjustment, you
need two separate measurement points with a difference of at least 50
%RH between them.
Follow the general directions of connecting the HMI41 to the HMT130
and selecting the HMI41 calibrator function and then continue according
to the chosen adjustment method.
1
3
2
0505-187
Figure 20
Location of the HMI41 Calibration Connector
The following numbers refer to Figure 20 above:
1
2
3
=
=
=
HMI41 indicator
EXT connector
25917ZZ connection cable
VAISALA _______________________________________________________________________ 67
User's Guide ______________________________________________________________________
Connections and Selecting the Calibrator Function
1.
To select the calibrator function from the HMI41, press the ON/OFF
button until you can see some text on the display. Then release the
ON/OFF button and within 1 ... 2 seconds, press both ENTER and MODE
buttons until the following display appears:
2.
After a few seconds, the display changes to show the following:
°C
set
If the basic settings (display units, automatic power off function,
display quantities, and pressure) have to be changed, please refer to
the HMI41 Operating Manual. Otherwise, press ENTER repeatedly
until the following display appears:
set
To calibrate the HMT130, select number 3 with buttons ▲ (number
up) and ▼ (number down) and then press ENTER.
3.
Next the baud rate appears on the display. Use the baud rate 19200
(= 19.2 on the HMI41 display) with the HMT130 series. If the
baud rate on the HMI41 display is not correct, change it with
buttons ▲ and ▼. When the baud rate is correct, press ENTER, and
the serial communications settings display appears. The correct
settings for HMT130 series are: N, 8, 1. If needed, change the
settings with buttons ▲ and ▼ until they are correct, press ENTER,
and then ON/OFF.
These setting are stored in the HMI41 memory; when the HMI41 is
turned on again, it will automatically wake up as a calibrator for digital
transmitters with these serial line settings. After making these settings,
continue with the adjustment and follow the directions of the chosen
adjustment method.
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Offset and Gain Adjustments
Offset and gain adjustments are performed in the same way (they differ
only in internal calculations), so this section is valid for both methods.
4.
5.
6.
Connect the 25917ZZ HMI41-connection cable to the SERVICE PORT
connector on the HMT130 motherboard (see Figure 10 on page
24).
Connect the other end of the connection cable to the EXT connector
located on the bottom of the HMI41 indicator (see Figure 20 on
page 67).
Turn on both devices. Wait until the following display appears:
RH
7.
Select the appropriate adjustment mode with the ▲ and ▼ buttons.
Select offset adjustment if the humidity is < 65 %RH and gain
adjustment if the humidity is ≥ 65 %RH:
RH
RH
or
Press ENTER to confirm the selection. A display similar to the
following appears:
RH
NOTE
%
In case of using a HMT130 transmitter with display option the text
"HMI41 adjustment mode" is shown at the upper row of HMT130
display.
The next sections describe how to perform offset and gain adjustments in
two different ways.
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User's Guide ______________________________________________________________________
HMI41 as a Reference Meter
The HMI41 humidity probe is used to show the correct humidity value
(be sure that the reference probe has previously been adjusted). Connect
the cable and select the appropriate adjustment method as previously
explained, and continue according to the following instructions.
8.
A display similar to the one below should be visible:
RH
%
Numbers on the first line indicate the transmitter reading, and the
numbers on the second line indicate the reference probe reading.
9.
Let the readings stabilize (may take 30 minutes or more). If you
prefer, you can change the display to show the difference in the
readings. Press HOLD and a display similar to the following appears:
RH
%
The numbers on the first line indicate how much the transmitter
reading differs from that of the HMI41 reference probe. The
numbers on the second line indicate the reference probe reading.
You can return to the previous display by pressing HOLD again.
10.
When the readings have stabilized, press ENTER to conclude the
adjustment. When ENTER is pressed, the transmitter reading is
corrected to the reference probe reading. If the adjustment has been
succesful, the following display appears:
RH
11.
The data is now stored in the transmitter memory. If the adjustment
has not been succesful, the following display appears:
RH
In this case, perform the adjustment again. Whether the adjustment
was succesful or not, the HMI41 always returns to display the
selected adjustment mode.
12.
After succesfully completing the adjustment, turn off the HMI41
and disconnect the cable.
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HMI41 as a Terminal
The HMI41 can also be used for visualizing and setting the transmitter's
RH reading manually.
8.
A display similar to the one below should be visible:
RH
%
The numbers on the first line indicate the transmitter reading,
and the numbers on the second line indicate the HMI41 probe
reading.
9.
Let the readings stabilize and press MODE. The following display
appears:
RH
%
set
The HMI41 now works only as a terminal for setting the
humidity reading. The numbers on the first line are blinking, and
the numbers on the second line indicate the transmitter reading.
10.
You can now set the blinking reading to the correct value (for
example, the equilibrium RH of a salt solution) with the buttons
▲ and ▼. Press ENTER to conclude the adjustment. If the
adjustment has been succesful, the following display appears:
RH
11.
The data is now stored in the transmitter memory. If the
adjustment has not been succesful, the following display
appears:
RH
In this case, perform the adjustment again. Whether the
adjustment was succesful or not, the HMI41 always returns to
display the selected adjustment mode.
12.
After succesfully completing the adjustment, turn off the HMI41
and disconnect the cable.
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Troubleshooting
Table 6 presents a summary of the error messages that may appear during
adjustment with the HMI41.
Table 6
Common Problems During Adjustment and Their
Remedies
Error Message
RH
Probable Cause
This message may
appear, for example, if
the difference between
the reference humidities
is too small
(< 50 %RH).
This message may
appear during
adjustment when the
HMI41 is trying to
contact the transmitter.
The connection cable is
not properly connected
or the serial line
settings of the HMI41
and the transmitter do
not correspond.
Remedy
Perform the adjustment
again.
Wait.
Check the connection of
the calibration cable.
Check that the serial line
settings in the HMI41
memory correspond to
those of the transmitter.
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Analog Output Tests
HMT130 has a built-in software function for testing the analog outputs.
To test the outputs, do the following:
-
V
VIN+
SGND
VIN-
Press the - adjustment button (see Figure 16 on page 58).
This sets the output voltage level to the low point of the analog
output range (for example 0 V). The output stays at this level for
about 30 seconds after the - adjustment button has been pressed.
SHIELD
3.
CH2
Make sure the transmitter is not in adjustment mode.
Press the + adjustment button (see Figure 16 on page 58).
This sets the output voltage level to the high point of the analog
output range (for example 10 V). The output stays at this level for
about 30 seconds after the + adjustment button has been pressed.
CH1
1.
2.
+
10 ... 35 VDC
24 VAC
V
1011-163
Figure 21
NOTE
HMT130 Output Voltage Measurement
If you are using the HMT130 transmitter with the display option, the
following texts are shown at the display during analog output test:
"Analog output test high": analog output set to upper limit
"Analog output test low": analog output set set to low limit
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74 __________________________________________________________________ M211280EN-A
Chapter 6 ___________________________________________________________ Troubleshooting
CHAPTER 6
TROUBLESHOOTING
This chapter describes error messages and analog output error behavior,
introduces some common problems, their probable causes and remedies
and provides contact information for Technical Support.
Error Codes
HMT130 software includes number of different self diagnostics, such as
flash and program memory checksum, probe communication status,
probe checksum, operation voltage check, oscillator fault check etc.
At startup software checks factory/user settings checksum, program
memory checksum and oscillator fault status. Other checks are made
during runtime. Available error codes are shown in the table below.
Table 7
Code
1
2
3
4
5
6
7
Error Codes and Texts
11
12
13
Description
Probe T measurement error
Probe RH measurement error
Probe communication error
Probe checksum error
Probe message form error
Program's flash checksum error
Current settings checksum error
(RAM)
Factory flash not initialised
User flash not initialised
Voltage is too low to operate
correctly
Measurements not available
Oscillator fault bit active
Analog output quantity invalid
14
Display quantity invalid
8
9
10
Error Text
Probe T meas
Probe RA meas
Probe communication
Probe checksum
Probe message form
Program code checksum
Settings checksum
Factory defaults empty
User defaults empty
Voltage too low
Measurements not available
HW fault 1
Analog output quantity
invalid
Display quantity invalid
Error text is shown by using the ERRS command via the serial interface.
In case of using a HMT130 transmitter with display option the error code
is shown at the display in format "ERR:Code-1[.Code-2][.Code-n]".
Multiple errors are separated with a dot between the error codes.
VAISALA _______________________________________________________________________ 75
User's Guide ______________________________________________________________________
Solving Typical Problems
You can check the error message via the serial interface by using the
ERRS command; see section Error Codes on page 75. In case of
constant error, please contact Vaisala technical support.
Table 8
Troubleshooting Table
Problem or Message
Measurement not working, any of
the following errors is active:
- Probe RH measurement error
- Probe T measurement error
Transmitter cannot communicate
with the probe, any of the
following errors is active:
- Probe communication error
- Probe checksum error
- Probe message form error
- Measurements not available
Serial line command not working,
outputs "Unknown command."
Likely Causes and Solutions
- Sensor(s) damaged or missing. Open the
probe filter and check.
- Calibration is not done. Calibrate the probe.
- Check the supply voltage of the transmitter.
- Check the attachment of the probe to the
transmitter.
- In case of remote probe, check also the
interconnection cables.
- Replace the probe if necessary.
Cannot connect to serial line,
current serial settings of the
module are unknown.
Perform the following steps to connect:
1. Set your terminal settings to 19200 8 N 1
(the default settings of the transmitter).
2. Connect to the service port of the
transmitter.
2. Power up the transmitter, and type "Z" on
the serial line at least five times.
4. The transmitter will come online with the
default settings.
5. Use the SERI command to set the desired
serial settings, and use the SAVE
command to save them.
Internal error. Perform the following steps:
1. Reset or power cycle the module. Check if
the error disappears.
2. Return the module to factory settings using
the FRESTORE command. Check again.
3. If the error is still active, contact a Vaisala
service center.
Faulty transmitter, contact a Vaisala service
center.
Any of the following errors is
active:
- Current settings checksum error
- Default settings checksum error
Any of the following errors is
active:
- Program checksum error
- Factory flash defaults checksum
error
- Factory flash not initialized
- Oscillator fault bit active
Any of the following errors is
active:
- Analog output quantity invalid
- Display quantity invalid
- Mistyped or unknown command, check the
command syntax and parameters.
In case of "Analog output quantity invalid"
error select the correct output quantities (set
with the CALCS command) with ASEL
command and in case of "Display quantity
invalid" error select the correct display
quantities with DSEL command.
76 __________________________________________________________________ M211280EN-A
Chapter 6 ___________________________________________________________ Troubleshooting
Analog Output Error Notification
If the transmitter is unable to operate due to an error, the analog outputs
will be set to an error level.
Default output voltage in error state is 0 V. Error voltage value can be
changed via the serial interface by using the AERR command; see
section Set/Show Analog Output Error Levels on page 42.
Technical Support
For technical questions, contact the Vaisala technical support via e-mail
at helpdesk@vaisala.com.
For contact information of Vaisala Service Centers, see
www.vaisala.com/services/servicecenters.html.
VAISALA _______________________________________________________________________ 77
User's Guide ______________________________________________________________________
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78 __________________________________________________________________ M211280EN-A
Chapter 7 ____________________________________________________________ Technical Data
CHAPTER 7
TECHNICAL DATA
This chapter provides the technical data of the product.
Specifications
Table 9
Relative Humidity Measurement Specifications
Property
Measurement range
Accuracy (including non-linearity,
hysteresis, and repeatability):
at 0 ... +40 °C (+32 ... +104 °F)
Description/Value
0 ... 100 % RH
±1.7 %RH (0 ... 90 % RH)
±2.5 %RH (90 ... 100 % RH)
at -40 ... 0 °C and +40 ... +80 °C
(-40 ... +32 °F and +104...+176 °F) ±3.0 %RH (0 ... 90 % RH)
±4.0 %RH (90 ... 100 % RH)
Factory calibration uncertainty at
+20 °C (+68 °F)
±1.5 %RH
Humidity sensor
HUMICAP® 180R
Table 10
Temperature Measurement Specifications
Property
Measurement range
Accuracy over temperature range:
at +15 ... +25 °C (+59 ... +77 °F)
at 0 …+15 °C and +25 …+40 °C
(+32 ... +59 °F and +77 ...+104 °F)
at -40 ... 0 °C and +40 ... +80 °C
(-40 ... +32 °F and +104...+176 °F)
Temperature sensor
Description/Value
-40 ... +80 °C (-40 ... +176 °F)
±0.2 °C (±0.36 °F)
±0.25 °C (±0.45 °F)
±0.4 °C (±0.72 °F)
Pt1000 RTD 1/3 Class B IEC 751
VAISALA _______________________________________________________________________ 79
User's Guide ______________________________________________________________________
Table 11
Operating Environment Specifications
Property
Operating temperature range
Transmitter body, no display
Transmitter body, with display
HMP110 probe
Storage temperature range
Electromagnetic compatibility
Description/Value
-40 ... +60 °C (-40 ... +140 °F)
-20 ... +60 °C (-4 ... +140 °F)
-40 ... +80 °C (-40 ... +176 °F)
-50 ... +70 °C (-58 ... +158 °F)
EN 61326-1:2006 Electrical
equipment for measurement,
control and laboratory use - EMC
requirements - Basic immunity test
requirements.
EN 55022:2006 + Am 1:2007
Information technology equipment Radio disturbance characteristics Limits and methods of
measurement. Class B.
Table 12
Inputs and Outputs
Property
Output signal
Min. output resistance
Supply voltage
Description/Value
0…1V
0…5V
0 ... 10 V
User-defined between 0 ... 10 V
1 kohm
10 ... 35 VDC
15 ... 35 VDC (when output
0 ... 10 V)
24 VAC (±20 %)
8 mA, if relay closed 15 mA
RS-485 (non-isolated)
1 relay (max. 50 VDC, 200 mA)
±0.1% of full scale output signal
Current consumption at 24 VDC
Serial output
Relay output
Max. additional error caused by the
analog outputs after calibration at +20
°C ambient temperature
Temperature dependence of the
±0.005% of full scale output signal
analog outputs
80 __________________________________________________________________ M211280EN-A
Chapter 7 ____________________________________________________________ Technical Data
Table 13
Mechanical Specifications
Property
Material
Transmitter housing
Display window
Probe body
Probe grid filter
Housing classification
Connections
Voltage outputs and RS-485
Probe interface
Probe cable lengths
Display (optional)
Weight (Wall model, including probe)
Weight (10m cable model)
Description / Value
PBT plastic
PC plastic
Chrome coated aluminum
Chrome coated ABS plastic
IP65 (NEMA 4)
Screw terminals 0.5 ... 1.5 mm²
4-pin M8 female panel connector
3 m, 5 m, 10 m, cables can be
cascaded up to 50 m
128x64 resolution full graphics
B&W display without backlight
270 g
540 g
Options and Accessories
Table 14
Options and Accessories
Description
HMP110 probe for HMT130
HMP110R replacement probe for
HMT130
HMP110T temperature only probe
for HMT130
Constant output probe
Humidity sensor
Probe mounting flange
Probe mounting clamps, 10 pcs
Sensor protection
Plastic grid filter
Membrane filter
Stainless steel sintered filter
Probe cable 3 m
Probe cable 5 m
Probe cable 10 m
Radiation shield
Rain shield with installation kit
Duct installation kit
HMI41 connection cable
HM70 connection cable
Service cable for PC, USB
Order Code
HMP110 – separate order form
HMP110R – separate order form
HMP110T – separate order form
HMP110REF – separate order form
Humicap180R
226061
226067
DRW010522SP
DRW010525
HM46670SP
HMT120Z300
HMT120Z500
HMT120Z1000
DTR502B
215109
215619
25917ZZ
211339
219685
VAISALA _______________________________________________________________________ 81
User's Guide ______________________________________________________________________
Transmitter Dimensions
1011-158
Figure 22
Dimensions of the Fixed Probe Model in mm (inches)
82 __________________________________________________________________ M211280EN-A
Chapter 7 ____________________________________________________________ Technical Data
1011-159
Figure 23
Dimensions of the Remote Probe Model in mm (inches)
VAISALA _______________________________________________________________________ 83
User's Guide ______________________________________________________________________
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84 __________________________________________________________________ M211280EN-A
Appendix A ______________________________________________________ Calculation Formulas
APPENDIX A
CALCULATION FORMULAS
This appendix contains the formulas used for the calculated output
quantities.
HMT130 transmitter receives relative humidity and temperature from the
HMP110 probe. From these values dewpoint, frostpoint, absolute
humidity, mixing ratio, enthalpy, wet bulb temperature, saturation vapor
pressure and vapor pressure in normal pressure are calculated using the
following equations.
Symbols:
Td
Pw
Pws
RH
x
p
a
T
h
Tw
Tdf
=
=
=
=
=
=
=
=
=
=
=
Dewpoint temperature (°C)
Water vapor pressure (hPa)
Saturation vapor pressure (hPa)
Relative humidity (%)
Mixing ratio (g/kg)
Atmospheric pressure (hPa)
Absolute humidity (g/m3)
Temperature (°C)
Enthalpy (kJ/kg)
Wet bulb temperature (°C)
Dew/frostpoint temperature (°C)
Dewpoint Temperature
The Dewpoint temperature (Td) of a moist air sample is the temperature
to which the sample must be cooled to reach saturation with respect to
liquid water.
Dewpoint temperature is calculated using:
Td 
Tn
m
P
log w
 A
 C




1
(1)
VAISALA _______________________________________________________________________ 85
User's Guide ______________________________________________________________________
Pw is the water vapor pressure (see the equation below). The parameters
A, m, and Tn depend on temperature according to the following table:
T
A
6.119866
6.1078
5.9987
5.8493
6.2301
… 0 °C
0 ... 50 °C
50 ... 100 °C
100 ... 150 °C
150 ... °C
m
7.926104
7.5000
7.3313
7.2756
7.3033
Tn
250.4138
237.30
229.10
225.00
230.00
Dew/frostpoint Temperature
Dew/frostpoint temperature is calculated using:
Td  0  Tdf  Td
Td  0  Tdf 
Tn
m
P
log w
 A



1
 C

(2)
Pw is the water vapor pressure (see the equation below). The parameters
A, m, and Tn depend on temperature according to the following table:
Td
… 0 °C
A
6.1134
m
9.7911
Tn
273.47
86 __________________________________________________________________ M211280EN-A
Appendix A ______________________________________________________ Calculation Formulas
Mixing Ratio
The mixing ratio (mass of water vapour/mass of dry gas) is calculated
using:
x  B
Pw
p-Pw
g / kg 
(3)
where
B = 621.9907 g/kg
The value of B depends on the gas. 621.9907 g/kg is valid for air.
Absolute Humidity
Absoute humidity is defined as the mass of water vapour in a certain
volume. If ideal gas behaviour is assumed the absolute humidity can be
calculated using:
a C
Pw
T  273.15
g / m 
3
(4)
where
C = 216.679 gK/J
Enthalpy
Entalpy can be calculated from mixing ratio using:
h  T  (1.01  0.00189  x)  2.5  x
kJ / kg 
(5)
VAISALA _______________________________________________________________________ 87
User's Guide ______________________________________________________________________
Saturation Vapor Pressure
The saturation vapor pressure (Pws) is the equilibrium water vapor
pressure in a closed chamber containing liquid water. It is a function only
of temperature, and it indicates the maximum amount of water that can
exist in the vapor state.
The water vapor saturation pressure Pws is calculated by using two
equations (6 and 7):
3
  T   C iT i
i o
hPa 
(6)
where
T
Ci
C0
C1
C2
C3
=
=
=
=
=
=
Temperature in K
Coefficients
0.49313580
-0.46094296 * 10-2
0.13746454 * 10-4
-0.12743214 * 10-7
3
ln Pws   bi i  b4 ln 
(7)
i  1
where
bi
b-1
b0
b1
b2
b3
b4
=
=
=
=
=
=
=
Coefficients
-0.58002206 * 104
0.13914993 * 101
-0.48640239 * 10-1
0.41764768 * 10-4
-0.14452093 * 10-7
6.5459673
88 __________________________________________________________________ M211280EN-A
Appendix A ______________________________________________________ Calculation Formulas
Water Vapor Pressure
Vapor pressure refers to the vapor pressure of water in air or other gas.
Water vapor has a partial pressure Pw which is part of the total pressure
of the gas.
The water vapor pressure is calculated using:
Pw  RH 
Pws
100
hPa 
(8)
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90 __________________________________________________________________ M211280EN-A
Appendix A __________________________________________________________________INDEX
INDEX
A
Accessories
Active Errors
Display
Analog Output
Calibrate
Configuration
Analog Output Error Levels
Set
Show
Analog Output Error Notification
Analog Output Quantity and Scaling
Set
Show
Analog Output Status
Show
Analog Outputs
Test
F
14, 81
48
73
38
41
42
42
77
42
42
33
44
C
Calculation Formulas
Calibration Commands
Calibration Information
Set
Show
Command List
Display
Commands
Other
Component Board
Components
Connections
Continuous Outputting
Start
Stop
85
36
32
32
48
46
24
16
24
34
35
Environmental Parameters
Set
Show
Error Codes
34
14
HM70
8, 58, 62, 66, 81
HMI41
8, 58, 67, 68, 69, 70, 71, 72, 81
HMT130
Adjustment
58
Calibration
58
Dimensions
82
General Information
7
Introduction
13
Product Overview
13
Reset
49
Specifications
79
HMT130H
13
HMT130T
13
HUMICAP®
Introduction
13
Replacing
55
Humidity and Temperature Transmitter
Introduction
13
Humidity Measurement
Calibrate
36
I
Installation
Duct
Interchangeable Probe
20
14
L
31
M
46
46
Maintenance
Measurement Parameters
Configuration
Mounting
E
49
H
LCD Display
D
Device Information
Displayed Quantities
Set
Show
Factory Settings
Restoring
Firmware Version
Show
Fixed and Remote Probe Models
14, 24
55
40
17
O
40
40
75
Operation
Options
Output Formatting
Set
Show
27
14, 16, 81
47
47
VAISALA _______________________________________________________________________ 91
User's Guide ______________________________________________________________________
Output Interval
Set
Show
Output Quantities
Output Unit
Set
Show
S
35
35
13
50
50
P
Probe Mounting Clamp
Probe Mounting Flange
Probe RH
Restore Factory Calibration
Probe T
Restore Factory Calibration
PuTTY
23
22
37
38
28
Q
Quantity
Set
Show Available
30
40
40
39
34
39
39
27
49
48
34
T
31
31
R
Radiation Shield
Installation
Rain Shield
Installation
Reading Output
Once
Recycling
Relay Operating Mode
Set
Show
Relay Settings
Show
Serial Commands
Serial Interface Mode
Set
Show
Serial Line Operation
Configuration
Serial Line Output Commands
Serial Line Settings
Set
Show
Service Port
Settings
Restoring
Saving
System Information
Show
19
18
35
9
45
45
45
Technical Data
Technical Support
Temperature Measurement
Calibrate
Terminal Application Settings
Terminal Echo
Set
Show
Transmitter
Reset
Troubleshooting
79
77
37
28
39
39
49
75
U
USB Cable
Driver installation
27
W
Warranty
11
92 __________________________________________________________________ M211280EN-A
www.vaisala.com
*M211280EN*