QMA401 Trace Moisture Analyzer User`s Manual

QMA401 Trace Moisture Analyzer User`s Manual
QMA401
Trace Moisture Analyzer
User’s Manual
97450 Issue 1
July 2015
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Use this information when contacting Michell Instruments for service purposes.
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Invoice Date
Location of Instrument
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QMA401
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www.michell.com
© 2015 Michell Instruments
This document is the property of Michell Instruments Ltd. and may not be copied or
otherwise reproduced, communicated in any way to third parties, nor stored in any Data
Processing System without the express written authorization of Michell Instruments Ltd.
QMA401 User’s Manual
Contents
Safety ............................................................................................................................... vii
Warnings .................................................................................................................... vii
Electrical Safety .......................................................................................................... vii
Pressure Safety ........................................................................................................... vii
Hazardous Materials (WEEE, RoHS2 & REACH) .............................................................. vii
Calibration (Factory Validation).................................................................................... viii
Repair and Maintenance ............................................................................................. viii
Abbreviations ......................................................................................................................ix
1
2
3
4
iv
INTRODUCTION ................................................................................................1
1.1
1.2
1.3
1.4
General.............................................................................................................. 1
Theory of Operation ........................................................................................... 2
Sample Gas Path ................................................................................................ 2
Internal Sampling Options ................................................................................... 3
INSTALLATION ..................................................................................................4
2.1
2.2
2.3
2.4
2.5
2.6
Analyzer Storage Instructions .............................................................................. 4
Unpacking the Instrument ................................................................................... 5
Electrical Requirements ....................................................................................... 5
Rear Panel Connections ...................................................................................... 6
Pressure Safety .................................................................................................. 7
Connection of Gas Supplies ................................................................................. 8
OPERATION ....................................................................................................10
3.1
3.2
3.2.1
3.3
3.4
3.5
3.5.1
3.5.2
3.6
3.6.1
3.6.2
3.6.3
3.6.4
3.6.5
3.7
3.7.1
3.7.2
3.7.3
3.7.4
3.7.5
3.7.6
3.7.7
3.8
3.9
3.10
General Operational Information ........................................................................ 10
First Time Operation ......................................................................................... 10
Analyzer Set-Up .......................................................................................... 11
Menu Structure ................................................................................................ 12
Description of Measured Parameters .................................................................. 13
Main Screen .................................................................................................... 14
Large Display Mode ..................................................................................... 15
Full Screen Graph........................................................................................ 15
Main Screen Sub Menus .................................................................................... 16
Status Screen ............................................................................................. 16
Logging Screen .......................................................................................... 17
Alarm Screen .............................................................................................. 18
Calibration Screen ....................................................................................... 19
Monitor Screen ........................................................................................... 21
Settings Menu ................................................................................................. 22
Measurement Screen ................................................................................... 23
Outputs Screen ........................................................................................... 25
HMI Screen ................................................................................................ 26
Real Time Clock Screen ............................................................................... 27
ModBus Screen ........................................................................................... 28
Ethernet Screen .......................................................................................... 28
About Screen .............................................................................................. 29
Sampling Guidelines ......................................................................................... 30
Measurement Cycle .......................................................................................... 33
Calibration Cycle ............................................................................................... 35
MAINTENANCE ................................................................................................37
4.1
4.2
Removal and Replacement of the Power Supply Fuse .......................................... 38
Removal and Replacement of the Desiccant Column............................................ 38
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QMA401 User’s Manual
5
6
7
CALIBRATION..................................................................................................40
5.1
Traceability ...................................................................................................... 40
APPLICATION SOFTWARE OVERVIEW ...............................................................42
6.1
System Requirements ....................................................................................... 42
6.2
System Connection ........................................................................................... 42
6.3
Getting Started................................................................................................. 43
6.3.1
Connection Method (Serial Connection (RS485 or USB) .................................. 44
6.3.1.1
RS485 Connection ................................................................................. 44
6.3.1.2
USB Connection .................................................................................... 44
6.3.1.3
Modbus TCP Connection (Ethernet) ....................................................... 44
6.4
Main Window ................................................................................................... 45
6.5
Using the Chart ................................................................................................ 46
6.5.1
Chart Options Window................................................................................. 47
6.6
Data Logging ................................................................................................... 48
6.6.1
Configuring Logging Start Time .................................................................... 49
6.6.2
Configuring Logging Stop Time .................................................................... 49
6.6.3
Starting the Log .......................................................................................... 49
6.6.4
Viewing a Log ............................................................................................. 49
6.7
Parameters / Field Calibration ............................................................................ 49
6.7.1
Field Calibration .......................................................................................... 50
SHIPPING .......................................................................................................51
7.1
Preparation for Shipping and Packing ................................................................. 51
Tables
Table
Table
Table
Table
Table
Table
Table
Table
Table
Table
1
2
3
4
5
6
7
8
9
10
Main Screen Parameters............................................................................. 14
Alarm Screen Parameters .......................................................................... 18
Calibration Screen Parameters ................................................................... 20
Monitor Screen Parameters ....................................................................... 21
Measurement Screen Parameters ............................................................... 24
Outputs Screen Parameters ....................................................................... 25
HMI Setup Screen Parameters ................................................................... 26
Real Time Clock Screen Parameters ........................................................... 27
Modbus Screen Parameters ....................................................................... 28
Ethernet Screen Parameters ...................................................................... 28
Michell Instruments
v
QMA401 User’s Manual
Figures
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
Measurement System .................................................................................2
Internal Sampling Options ...........................................................................3
Power Connection.......................................................................................5
Rear Panel Connections ..............................................................................6
Typical Gas Connections ..............................................................................8
Typical Display .........................................................................................11
Menu Structure ........................................................................................12
Main Screen .............................................................................................14
Large Display Mode ..................................................................................15
Full Screen Graph .....................................................................................15
Status Screen ...........................................................................................16
Logging Screen ........................................................................................17
Alarm Screen ...........................................................................................18
Calibration Screens ...................................................................................19
Monitor Screen .........................................................................................21
Settings Menu Screen ...............................................................................22
Measurement Screen ................................................................................23
Outputs Screen ........................................................................................25
HMI Screen ..............................................................................................26
Real Time Clock Screen.............................................................................27
ModBus Screen ........................................................................................28
Ethernet Screen .......................................................................................28
About Screen ...........................................................................................29
Service Screen .........................................................................................29
Measurement Cycle (Phase 1) - Dried Sample Flow .....................................33
Measurement Cycle (Phase 2) Calibration Flow ...........................................34
Calibration Cycle (Phase 1) - Dried Sample Flow .........................................35
Calibration Cycle (Phase 2) - Sample Flow ..................................................36
Typical QMA401 Calibration Certificate .......................................................41
Appendices
Appendix A
Appendix B
Appendix C
Appendix D
vi
Technical Specification ............................................................................... 53
EU Declaration of Conformity...................................................................... 55
Quality, Recycling & Warranty Information................................................... 57
C.1
Pressure Equipment Directive (PED) 97/23/EC ............................... 57
C.2
Recycling Policy .......................................................................... 57
C.3
WEEE Compliance........................................................................ 57
C.4
RoHS2 Compliance ...................................................................... 58
C.5
Warranty ..................................................................................... 58
C.6
REACH Compliance ...................................................................... 59
C.7
Return Policy ............................................................................... 59
C.8
Calibration Facilities ..................................................................... 60
C.9
Manufacturing Quality .................................................................. 60
C.10
FCC (EMC Requirements for North America) .................................. 60
Return Document & Decontamination Declaration ........................................ 62
97450 Issue 1, July 2015
QMA401 User’s Manual
Safety
The instrument is designed to be completely safe when installed and operated correctly in accordance
with the information provided in this manual.
This manual contains all the required information to install, operate and maintain this product. Prior
to installation and use of this product, this entire manual should be read and understood. Installation
and operation of this product should be carried out by suitably competent personnel only. The
installation and operation of this product must be in accordance with the instructions provided and
according to the terms of any associated safety certificates. Incorrect installation and use of this
product other than those described in this manual and other than its intended purpose will render
all warranties void.
This product meets the essential protection requirements of the relevant EU directives. Further
details of applied directives may be found in the product specification.
Electricity and pressurized gas can be dangerous. This product must be installed and operated only
by suitable trained personnel.
Warnings
!
Where this hazard warning symbol appears in the following sections,
it is used to indicate areas where potentially hazardous operations
need to be carried out and where particular attention to personal and
personnel safety must be observed.
DANGER
Electric
Shock Risk
Where this symbol appears in the following sections it is used to
indicate areas of potential risk of electric shock.
Electrical Safety
Ensure electrical safety is complied with by following the directions provided here and observing all
local operation & installation requirements at the intended location of use.
This product is completely safe when using any options and accessories supplied by the manufacturer
of this product for use with it. Refer to Section 2 (Installation) of this manual for further details.
Pressure Safety
For this product to operate satisfactorily, pressurized gas must be connected to it. Observe all the
information contained within this manual and all local operation & installation requirements at the
intended location of use. Refer to Section 2 (Installation) of this manual for further details.
Hazardous Materials (WEEE, RoHS2 & REACH)
This product does not contain or release any prohibited chemicals listed on the SVHC (Substances
of Very High Concern) Candidate List. During the intended normal operation of this product it is not
possible for the user to come into contact with any hazardous materials. This product is designed to
be recyclable except where indicated, see relevant sections in this manual for further details.
Michell Instruments
vii
QMA401 User’s Manual
Calibration (Factory Validation)
Prior to shipment, the instrument undergoes stringent factory calibration to traceable standards.
Due to the inherent stability of the instrument, regular factory calibration is not required under
normal operating conditions. The instrument should perform reliably for many years with just basic
maintenance, housekeeping and regular field calibrations from the internal reference (moisture
generator) or a known external reference.
There are, however some consumables that will require periodic replacement.
•
Moisture generator - typical lifetime of around 3 years.
•
Desiccant column - typical lifetime of around 2 years, but this strongly
depends on the moisture content of the sample gas. The drier the sample
gas, the longer lifetime of the desiccant.
Michell Instruments can provide a fully traceable factory calibration service for the instrument and it
is recommended that this is considered at intervals of every year of the analyzer's life. Please contact
your local Michell Instruments' office or representative for further details (www.michell.com).
Repair and Maintenance
Apart from user-replaceable components required for routine operational maintenance described
above, the analyzer must only be maintained either by the manufacturer or an accredited service
agent. Refer to www.michell.com for details of Michell Instruments’ worldwide offices contact
information.
viii
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QMA401 User’s Manual
Abbreviations
The following abbreviations are used in this manual:
A
AC
atm
bara
barg
°C
°F
EU
hr
Hz
IEC
IP
ml/min
mg/m3
lbs/MMscf
mA
mg/Nm3
ml/min
mins
mmHg
Pa
ppmV
ppmW
psia
psig
RH
RS485/232
RTC
RTU
SD
UART
USB
V
"
Δ
%
Ω
Michell Instruments
ampere
alternating current
pressure unit (atmosphere)
pressure unit (=100 kP or 0.987 atm) (absolute)
pressure unit (=100 kP or 0.987 atm) gauge
degrees Celsius
degrees Fahrenheit
European Union
hour
Hertz
International Electrotechnical Commission
Internet protocol
milliliters per minute
milligrams per cubic meter
pounds per million standard cubic feet
milliampere
milligrams per normal cubic meter
milliliters per minute
minutes
millimeter of mercury
pascal
parts per million (by volume)
parts per million (by weight)
pound(s) per square inch (absolute)
pound(s) per square inch (gauge)
relative humidity
standards defining the electrical characteristics of drivers & receivers
real time clock
Remote Terminal Unit
storage device card
universal asynchronous receiver/transmitter
Universal Serial Bus
Volts
Inch
delta
percentage
ohms
ix
QMA401 User’s Manual
1
INTRODUCTION
1.1
General
INTRODUCTION
The QMA401 Moisture Analyzer is designed to provide reliable, fast and accurate
measurement of trace moisture content in a wide variety of applications where keeping
moisture levels as low as possible is of critical importance.
The high-contrast LCD touchscreen display presents all measured data to the user in a
clear and understandable format. The main display incorporates a real-time trend graph
and alarm indicators based on the NAMUR 102 standard. A powerful and intuitive HMI
makes control, logging and configuration of analyzer parameters straightforward.
The instrument provides two user-configurable analog outputs, and ModBus RTU
communications, allowing it to interface with a SCADA DCS system, or by a computer
using the dedicated application software. A pair of adjustable isolated alarm contacts
allow the QMA401 to be used for direct process control.
The QMA401 offers:
•
ModBus RTU
•
Datalogging to SD Card
•
2 user-configurable analog outputs
•
Status and Process Alarms
Minimal & Straightforward Maintenance
Sophisticated instruments are often complicated and require experience and special care
in use, increasing cost of ownership. The QMA401 differs through its very uncomplicated
approach to field service; the desiccant column is easy to replace via the dryer service
panel on the rear of the instrument. The moisture generator has an average life span of
3 years before maintenance is required.
Automated Calibration for Continued Reliability
The QMA401 incorporates an integrated automatic calibration system for complete
user confidence. Periodic calibration checks of sensor performance can be initiated
on demand, or automatically (at user defined intervals and time of day), providing a
verification against the calibrated moisture generator or an external reference. The
moisture generator at the core of this system is supplied with a calibration traceable to
NPL and NIST.
During an internal calibration cycle, the Data Hold function will prevent any interruption
of dependant processes by holding the analog outputs at the same level for the duration
of the calibration.
Integrated Sample Handling Components
The QMA401 features an optional bypass arrangement to increase transport speed of
the sample.
A pressure regulator can also be specified to increase the range of acceptable input
pressure, and to protect the instrument against pressure shocks.
Michell Instruments
1
QMA401 User’s Manual
INTRODUCTION
1.2
Theory of Operation
The Quartz Crystal Microbalance (QCM) technology for moisture measurement is
based on monitoring the frequency of a hygroscopic-coated quartz crystal with specific
sensitivity to water vapor.
Bulk adsorption of water vapor onto the coated crystal causes an increase in the crystals
effective mass, modifying its oscillation frequency in a very precise and repeatable
manner. The frequency change is in proportion to the water vapor pressure in the
sample gas, providing a direct measurement of moisture content.
The sorption process is fully reversible with no long-term drift effect, giving a highly
reliable and repeatable measurement.
1.3
Sample Gas Path
The QMA401 measurement system must be supplied with gas at the required pressure
(to match that of its calibration) via the VCR connection on the rear of the instrument.
The flow is controlled automatically.
The sensor cell is located at the end of the sensor block and contains the sensor and
reference oscillators. Figure 1 shows a schematic diagram of this sampling system:
SAMPLE
IN
DD
HE1
HE2
MG
V1
V2
FC1
V3
FC2
FC3
QCH
PS
SAMPLE
OUT
MFC
Key
DD
MFC
Desiccant column
QCH
PS
Sensor cell
Mass flow controller
Pressure sensor
Figure 1
2
MG
V1, V2, V3
Moisture generator
HE1/HE2
FC1
Heat exchanger
Solenoid Valves
Flow control
Measurement System
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QMA401 User’s Manual
1.4
INTRODUCTION
Internal Sampling Options
The QMA401 is available with 3 internal sampling configurations.
GAS IN
GAS OUT
DRYER
OVEN
S1 - Default option
GAS OUT
P
R E RES
G U SU
LA RE
TO
R
GAS IN
FILTER
DRYER
OVEN
S2 - Includes 2μm filter and pressure regulator, allowing
the QMA401 to accept greater sample pressures.
ME
FILTER
T
VA ERIN
LV G
E
GAS OUT
P
R E RES
G U SU
LA RE
TO
R
GAS IN
DRYER
OVEN
S3 - Includes 2μm filter, pressure regulator and bypass metering
valve, for fast sample transport to the instrument.
Figure 2
Michell Instruments
Internal Sampling Options
3
INSTALLATION
2
INSTALLATION
2.1
Analyzer Storage Instructions
QMA401 User’s Manual
In order for this product to be functional upon installation it should be stored in
accordance with the guidelines below:
•
The product must be housed in a sheltered area, out of direct sunlight
and rain.
•
The product should be stored to minimize the possibility of sitting in
ground water.
•
The temperature within the storage environment should be maintained
between -20 to +60°C (-4 to +140°F).
•
The humidity within the storage environment must be non-condensing.
•
The storage environment must not expose the analyzer to any corrosive
elements.
•
The product may stay assembled with its sample conditioning system (if
supplied).
•
All electrical and process connections should remain disconnected and
capped.
•
All protective coatings should remain in place until installation.
•
For prolonged periods of storage, the lid of the packaging crate should be
removed to allow air to circulate.
•
Any documentation supplied with the product should be removed from
the packaging crate and stored elsewhere to protect its integrity.
For the period from installation of the product to commissioning start-up, the following
precautions should be followed:
•
The product and associated sampling system (if supplied) must remain
isolated from the process gas, and the enclosure should remain closed to
ensure ingress protection is maintained.
•
If supplied, the sampling system enclosure heating/thermostat circuit
should be operated if the climatic temperature might fall below +5°C
(+41°F).
•
At time of start-up the procedures contained in the user manuals for both
analyzer and sampling system must be followed.
If the product was previously in service/operation then the following precautions should
be followed before storage:
4
•
Upon isolation from the gas sample the entire system should be purged
with a dry nitrogen gas before powering down of the analyzer.
•
All connections and ports (gas and electrical) to the analyzer or sample
system (if provided) should be capped.
•
If the product is not removed from its location, the electrical grounding of
the analyzer should remain in place.
97450 Issue 1, July 2015
QMA401 User’s Manual
2.2
INSTALLATION
Unpacking the Instrument
Open the crate and carefully unpack the instrument.
NOTE: Retain the packaging in case the instrument is returned for factory
calibration or service.
The accessories box should contain the following items:
•
Traceable calibration certificate
•
SD memory storage card
•
USB communications cable
•
IEC power cable
•
Application software CD
•
Users manual
If there are any shortages please notify the supplier immediately.
2.3
Electrical Requirements
The QMA401 requires the following electrical supply:
•
85 to 264 V AC 47/63Hz, 250 VA max
•
Alarm outputs comprise four sets of changeover relay contacts, one set
for INTERNAL FAULTS, and three sets for PROCESS alarms. All contacts
are rated at 24 V, 1A. NOTE: THIS RATING MUST NOT BE EXCEEDED
Fuse
This product is provided with an internally mounted fuse. A replacement fuse can be
obtained by contacting Michell Instruments' technical support. Fuse rating = 5 x 20mm
3 A anti-surge to IEC 60127-2.
Power Connection
DANGER
Electric
Shock Risk
The product is provided with an IEC C13 socket on the rear panel for mains power input.
This equipment must be supplied with a voltage between the range of 85 to 264 V AC
47/63Hz, maximum required power is 140 W.
Figure 3
Michell Instruments
Power Connection
5
QMA401 User’s Manual
INSTALLATION
2.4
Rear Panel Connections
1
2
3
POWER:
85-264V AC
47-63Hz
100VA
MODBUS
USB
1
MODBUS
485
4
BYPASS
FLOW
ADJUSTMENT
ALARMS 1 - 2
ALARMS 3 - 4
Power Connection
5
6
7
8
9
INPUT
PRESSURE
CONTROL
EXTERNAL
PRESSURE
ANALOGUE
OUTPUT
DESICCANT DRYER FITTED BEHIND THIS PANEL
FOR REMOVAL/INSTALLATION REFER TO USER MANUAL
IEC Power Socket, On/Off Switch & Fuse
USB
A
RS485 (Modbus)
B
G
NC1
NO1
COM1
Alarms 1 & 2
2
NC2
Electrical Connections #1
NO2
COM2
NC3
NO3
COM3
Alarms 3 & 4
NC4
NO4
COM4
3
Bypass Flow Adjustment
4
Input Pressure Control
5
Ethernet
+24V
External Pressure
6
Signal
OP1+
Electrical Connections #2
OP1-
Analog Output
OP2+
OP2-
7
Desiccant Column Access Panel
8
Gas Outlet
9
Gas Inlet
Figure 4
6
Rear Panel Connections
97450 Issue 1, July 2015
QMA401 User’s Manual
2.5
INSTALLATION
Pressure Safety
WARNING:
!
This product is used in conjunction with pressurized gases.
Observe pressurized gas handling precautions.
WARNING:
!
Pressurized gas is dangerous and should only handled by
suitably trained personnel.
DO NOT permit pressures greater than the specified safe working pressure to be applied
directly to the instrument.
!
Michell Instruments
For the calibration to remain valid the QMA401 must be
operated at the pressures specified on the calibration
certificate (typically a sample pressure of 1 barg (14.5
psig), with the outlet at atmospheric pressure). When using
the pressure control option, the cell pressure should never
exceed the maximum stipulated operating pressure of 1
barg (14.5 psig).
7
QMA401 User’s Manual
INSTALLATION
2.6
Connection of Gas Supplies
Sample gas connections are made via the gas inlet and outlet 1/4" VCR ports located on
the rear panel of the instrument as shown in Figure 5. All connections should be made
with high quality stainless steel tubing.
NOTE: No external gas couplings are supplied with the analyzer but can
be ordered as an accessory by contacting Michell Instruments - see www.
michell.com for contact details.
PLE
SAM ET
TL
OU
NOTE: Items 1 to 6 are not
supplied with the unit, and
only illustrated to show a
typical gas coupling.
8
9
7
6
5
4
3
2
Figure 5
1
Typical Gas Connections
Making a connection to the 1/4" VCR fitting:
8
1.
Clip the gasket and its retaining ring (8) over the end of the VCR adaptor
(5).
2.
Locate the end of the VCR adaptor (5), fitted with the gasket (8) over the
VCR port (9) and screw the locking nut (7) finger tight to fix the adaptor
to the port.
3.
Tighten the locking nut (7) one eighth of a turn.
97450 Issue 1, July 2015
QMA401 User’s Manual
INSTALLATION
Connection to a VCR to 1/4" Swagelok tube adaptor:
(available as an accessory)
1.
Cut ¼” stainless steel tubing (1) to the correct length and, if necessary,
bend to shape to suit the location of the instrument. NOTE: To facilitate
ease of connection to the adaptor (5), at least 75mm (3 in) of the
tubing coming out of the adaptor must be straight.
2.
Clean off any burrs or metal shavings adhering to the tubing.
3.
Pass the tubing (1) through the locking nut (2), and the back ferrule (3).
4.
Place the front ferrule (4) over the stainless steel tubing (1), bevelled end
towards the adaptor (5).
5.
Insert the stainless steel tubing (1) as far as it will go into the adaptor (5)
and tighten up the locking nut (2) finger tight.
6.
Hold the adaptor (5) flats with a spanner and tighten up the locking nut
(2). This action compresses the front ferrule (4) and back ferrule (3) onto
the tubing to form a gas tight seal. Caution: Do not overtighten as
this could cause the ferrules to crack and destroy the integrity
of the seal.
The couplings can be checked for leaks by pressurizing the system (by connecting the
sample line to the process) and introducing a proprietary leak test solution into each of
the test ports (6) located on the locking nut (7). If a stream of bubbles is produced then
the gasket seal is leaking. If no bubbles are produced, the seal is gas tight.
If a leak is detected, tighten up the locking nut (7) a little more until the leak stops. If
the leak cannot be stopped by tightening the coupling, unscrew the locking nut (7), and
remove the coupling from the instrument.
Examine the ends of the coupling to check that the surfaces are not damaged and then
fit a new gasket (8), re-connect and re-test.
Michell Instruments
9
QMA401 User’s Manual
OPERATION
3
OPERATION
This section describes both the general operation of the analyzer and the method of
setting-up and changing the default parameters if this should become necessary.
Prior to operation, the instrument must have been connected to the correct electrical
power supply and the relevant analog and alarm outputs connected to external systems
as required and as described in Section 2. The instrument must also have been installed
as detailed in Section 2 and connected to a sample gas supply that is representative of
the monitored process.
3.1
General Operational Information
Operation of the QMA401 Trace Moisture Analyzer is completely automated and once
set-up requires little or no operator intervention.
3.2
First Time Operation
When the instrument is switched on an Initializing overlay will be shown while the menu
system loads.
QMA401
Trace Moisture Analyzer
Initializing
After initialization is complete, the following display will appear.
Oven heating to set point,
please wait
OK
The heating period lasts about an hour, allowing time for the internal sampling system
to purged with the sample gas.
10
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QMA401 User’s Manual
3.2.1
OPERATION
Analyzer Set-Up
During the period when the oven is heating to set point all functions, except for HMI
adjustments, are disabled until the oven has reached its operating temperature. Access
the Settings menu to adjust the following parameters before operating the analyzer for
the first time:
•
Temperature and pressure units
•
Carrier gas and pressure input
•
Alarm configuration
•
Analog output configuration
•
Field calibration parameters
•
Real time clock
Upon completion of oven heating the Main Screen will appear showing the default
parameters and units (example shown below).
Frost Point
10
-66.9
°C
°C
Parameter
1&2
Cell Pressure
3.0
barg
Alarms
0
-5
-4
-3
1
H20 mg/m3
HIGH
2
WVP Pa
LOW
DP °C
3
H20 lbs/MMscf
TRIP
Inst. Mode
4
Internal Alarms
OK
STATUS
LOGGING
Figure 6
ALARM
-2
Next Measurement
CALIBRATE
SETTINGS
-1
0m
0.00
Calibration
0m
MONITOR
Typical Display
Using the inlet pressure regulator adjust the sample pressure until the reading on the
internal sensor pressure readout matches the value on the calibration certificate. The
pressure at the outlet should be atmospheric unless otherwise stated on the calibration
certificate.
Michell Instruments
11
QMA401 User’s Manual
OPERATION
3.3
Menu Structure
LARGE DISPLAY
PARAMETER 1
LARGE DISPLAY
PARAMETER 2
MAIN SCREEN
FULL SCREEN
GRAPH
STATUS
LOGGING
ALARMS
CALIBRATION
SYSTEM TEMP
OVEN TEMP
FLOW
OUTPUT 1
CELL PRESSURE
OUTPUT 2
EXT PRESSURE
OSCILLATOR COM
CAL VALUE
ETHERNET COM
BEAT FREQUENCY
DESICCANT DRYER
ppmV VALUE
MOISTURE GEN
LOG INTERVAL
MONITOR
INTERVAL UNITS
START/STOP
SETTINGS
MEASUREMENT
OUTPUTS
HMI
RTC
MODBUS
ETHERNET
ABOUT
FIRMWARE VER
SERIAL NUMBERS
CARRIER GAS
DP CALCULATION
PRESSURE INPUT
ALARM SELECTOR
LATCH
RESET ALARM
LOW
PARAMETER
HIGH
CALIBRATE
DATA HOLD
OUTPUT SELECT
CAL SOURCE
PARAMETER
OUTPUT TYPE
MOISTURE PPMV
REF SOLENOID
MIN
BEAT HZ
SAMPLE SOLENOID
MAX
DELTA HZ
CAL. SOLENOID
SYS TEMP °C
DRYER % LEFT
FLOW RATE
MG DAYS LEFT
SENSOR PRESSURE
SCF
EXT PRESSURE
MGV
LANGUAGE
PRESSURE UNIT
CHART PERIOD
FLOW UNIT
BRIGHTNESS
PARAMETER 1
TEMP UNIT
PARAMETER 2
DAY/MONTH/YEAR
SAVE DATE
HOUR/MINUTE
SAVE TIME
MODBUS ID
PROTOCOL
IP ADDRESS
SUBNET MASK
DEFAULT GW
Figure 7
12
Menu Structure
97450 Issue 1, July 2015
QMA401 User’s Manual
3.4
OPERATION
Description of Measured Parameters
Moisture content ppmV
Parts per million of H2O by volume
Moisture content ppmW
Parts per million of H2O by weight
Moisture content mg/m3
Milligrams H2O per cubic meter gas
Water Vapor Pressure Pa Water vapor pressure in pascals
lbs/MMscf
Pounds H2O per million standard cubic feet
Frost Point
Frost point temperature of either ideal or natural gas depending
on options set on measurement screen
Oven Temperature
Temperature of the internal oven
Flow
Gas flow rate
Cell Pressure
Pressure measured by the internal pressure transducer
Ext. Pressure
Pressure measured by an external pressure transducer (if
fitted)
Michell Instruments
13
QMA401 User’s Manual
OPERATION
3.5
Main Screen
Frost Point
10
-66.9
°C
°C
Cell Pressure
3.0
barg
Alarms
0
-3
HIGH
2
WVP Pa
LOW
DP °C
3
H20 lbs/MMscf
TRIP
Inst. Mode
4
Internal Alarms
OK
LOGGING
ALARM
Figure 8
Parameter 1 & 2
Graph
-4
H20 mg/m3
STATUS
Parameter
-5
1
-2
-1
0.00
Calibration
0m
Next Measurement
CALIBRATE
0m
SETTINGS
MONITOR
Main Screen
Description
Live reading of the selected display parameters.
Live graph reading of parameter 1.
The current state of the alarms.
Alarm 1, 2 & 3
Internal Alarm
Possible alarm states:
Low – Alarm type is set to Low, and has been triggered because the
selected parameter is below the threshold value.
OK – Alarm has not been triggered.
High – Alarm type is set to High, and has been triggered because
the selected parameter is above the threshold value.
Displays the state of the internal alarms.
Possible alarm states:
No Warning / Warning! See Status
Displays the current instrument mode.
Possible instrument modes:
Measure – The QMA401 is performing a measurement cycle
Instrument Mode Cal Internal – The QMA401 is performing a self-calibration using
the internal reference
Cal External – The QMA401 is performing a self-calibration using an
external reference
Heating – The oven is still heating to the set-point temperature
Displays the countdown to the next mode. If the QMA401 is in warm
Oven
Temperature/Next up mode this parameter is replaced with a live oven temperature
reading.
Mode
Graph Delta
Above shown as ΔDP°C – Displays the difference between the
minimum and maximum graph measurements.
Table 1
14
Main Screen Parameters
97450 Issue 1, July 2015
QMA401 User’s Manual
3.5.1
OPERATION
Large Display Mode
Frost Point
3.0 barg
Alarms
-66.9
1
H20 mg/m3
Inst. Mode
2
WVP Pa
Next Measurement
3
H20 lbs/MMscf
Gas Phase
4
Internal Alarms
Next Phase
°C
Measure
60.0°C
Sample
5s
Touch screen to exit page
Figure 9
3.5.2
Large Display Mode
•
To access large display mode, press and hold on the measurement
parameter to be enlarged.
•
To return to the Main Screen, touch anywhere on the screen.
Full Screen Graph
°C
0.20
0.00
Alarms
-5.00
-3.75
-2.50
-1.25
1
H20 mg/m3
2
WVP Pa
Inst. Mode
3
H20 lbs/MMscf
Oven Temperature
4
Internal Alarms
Gas Phase
0m
ppmV
Figure 10
0.0
Heating
60.0°C
Reference
Full Screen Graph
Displays a full screen graph of Parameter 1.
•
To access the full screen graph, press the graph area of the Main Screen.
•
To return to the Main Screen, touch anywhere on the screen.
Michell Instruments
15
QMA401 User’s Manual
OPERATION
3.6
Main Screen Sub Menus
The following sub menus can be accessed from the Main Screen:
3.6.1
•
Status
•
Logging
•
Alarms
•
Calibrate
•
Monitor
Status Screen
The buttons on this screen are used to toggle the internal alarms on/off. When an
individual alarm is disabled it will not trigger the internal alarm.
Status
x
System Temperature
Off
x
Oven Temperature
Off
x
Flow
Off
x
Output 1
Off
x
Cell Pressure
Off
x
Output 2
Off
x
External Pressure
Off
x
Oscillator Comms
Off
x
Calibration Value
Off
x
Ethernet Comms
Off
x
Beat Frequency
Off
x
Desiccant Dryer
Off
x
ppmV Value
Off
x
Moisture Generator
Off
Figure 11
Status Screen
Displays the state of the internal alarm associated with each of the parameters above,
indicated by the following icons:
Value
16
Description
Off
Alarm disabled
On
Alarm enabled. No fault
ON
Alarm enabled. Fault condition
97450 Issue 1, July 2015
QMA401 User’s Manual
3.6.2
OPERATION
Logging Screen
Controls logging to the SD card.
Logging
1
Log Interval
Status:
Interval Units
Cycles
Stopped
Filename:
START
Logging Screen
Figure 12
Parameter
Description
Frequency of recording data to the log file
Log Interval
Interval Units
Status
Filename
Available Options: Cycles, Seconds
Displays status information related to logging, e.g. SD card full
Automatically generated filename based on current time and date
The SD card should be formatted as FAT32.
Frost Point
10
-66.9
°C
°C
Cell Pressure
3.0
barg
Alarms
0
-5
-4
-3
1
H20 mg/m3
HIGH
2
WVP Pa
LOW
DP °C
3
H20 lbs/MMscf
TRIP
Inst. Mode
4
Internal Alarms
OK
STATUS
Michell Instruments
LOGGING
ALARM
-2
Next Measurement
CALIBRATE
SETTINGS
-1
0m
0.00
SD card
slot
Calibration
0m
MONITOR
17
QMA401 User’s Manual
OPERATION
3.6.3
Alarm Screen
Alarms
Alarm 1
Parameter
Low
Clear Latch
Yes
H20 ppmV
Latch
Yes
0.00
High
0.00
Figure 13
Parameter
Alarm Selector
Parameter
Low
Latch
High
Description
The left and right arrow keys are used to toggle through the different
alarms available.
Available Options: Alarm 1, Alarm 2, Alarm 3
Selects the parameter for the corresponding alarm.
Available Options:
Moisture Content ppmV
Moisture Content ppmW
Moisture Content mg/m3
Water Vapor Pressure Pa
Moisture Content lbs/MMscf
Frost Point
Oven Temperature
Flow ml/min
Cell Pressure
External Pressure
Selects the lower alarm limit for the corresponding alarm using the
keypad which is opened.
Selects between latched and non-latched alarms.
Available Options: On, Off
Selects the higher alarm limit for the corresponding alarm using the
keypad which is opened.
Table 2
18
Alarm Screen
Alarm Screen Parameters
97450 Issue 1, July 2015
QMA401 User’s Manual
3.6.4
OPERATION
Calibration Screen
Calibration
Cal Method
Calibrate
Start
Manual
Data Hold
On
Settling Cycles
10
Hold Cycles
20
Cal. Cycles
10
Cal. Source
Internal
Cal Method
Auto
Calibration
Calibrate
Start
Data Hold
On
Interval (Days)
10
Hold Cycles
20
Hour
12
Cal. Source
Internal
Settling Cycles
10
Cal Cycles
10
Cal Method
Manual
Calibration
Calibrate
Start
Data Hold
On
Settling Cycles
10
Hold Cycles
20
Cal Cycles
10
Cal. Source
External
Ext. Ref (ppm)
0.00
Figure 14
Michell Instruments
Calibration Screens
19
QMA401 User’s Manual
OPERATION
Parameter
Calibrate
Description
Starts a calibration procedure if a manual calibration has been selected.
Toggles data hold mode. This determines whether the last valid
measurement is held while a calibration is carried out.
Data Hold
Cal Source
Available Options: On, Off
If data hold is selected, the user can select how many cycles, after the
calibration, the last measured value is held for.
Toggles between an external calibration source or the internal
calibration source. If an external calibration source is selected the
external reference moisture must be entered in the ext ref setting.
Available Options: External, Internal
External Cal Source - when this is chosen Ext Ref will need to be
entered to show the ppmV value of the external moisture reference.
Internal Cal Source - when this is chosen then the Cal Method can be
set to Manual or Automatic.
Toggles between manual calibration or automatic calibration mode.
Available Options: Automatic, Manual
Manual Cal Method - if this is chosen the Start button must be
pressed in order to initiate the calibration procedure. If this method
is chosen then both the Interval and Hour selection boxes are hidden
and a Start button is displayed.
Cal Method
Automatic Cal Method - if this is chosen then the following parameters
will need to be set and will be displayed on the screen. Calibration will
begin on the time selected using the interval and hour settings.
Frequency of automatic calibrations in days.
Interval (Days)
Hour
Settling Cycles
Cal Cycles
Table 3
20
The hour in the day at which an automatic
calibration will start.
Period of time for the QMA401 to stabilize to the
new moisture level (as presented by the internal
moist generator or external ppm value) before
conducting the actual calibration cycles.
Sets how many calibration cycles are carried out
Calibration Screen Parameters
97450 Issue 1, July 2015
QMA401 User’s Manual
3.6.5
OPERATION
Monitor Screen
Monitor
Moisture Content (ppmV)
50.00
Beat Freq
1000.00
Delta Freq
100.00
System Temperature (°C)
35.5
Ref
Sample Solenoid
30
Internal Cal Solenoid
Off
Dryer vol remaining (%)
2.00
Flow Rate (ml/min)
0.0
MG remaining (days)
103
Sensor Pressure (barg)
1.0
SCF
0.00
Ext. Pressure (barg)
0.0
MGV (ppmV)
0.00
Figure 15
Parameter
Moisture Content
Beat Frequency
Delta Frequency
System Temperature
Flow Rate
Sensor pressure
Ext pressure
Ref Solenoid
Sample Solenoid
Internal Cal Solenoid
Dryer vol remaining %
MG remaining (days)
SCF
MGV
Monitor Screen
Description
Live moisture reading in ppmV
Live beat frequency reading: the frequency difference between
the two crystals
Live delta frequency reading: the frequency difference between
the measurement and reference phase
Live system temperature
Live flow rate reading in ml/min
Live sensor pressure reading
Live process pressure reading
Displays the reference solenoid state
Displays the sample solenoid state
Displays the internal calibration solenoid state
Remaining dryer lifetime in %
Remaining moisture generator lifetime in days
Sensor correction factor set during a calibration cycle
Moisture Generator value
Table 4
Michell Instruments
Ref Solenoid
Monitor Screen Parameters
21
QMA401 User’s Manual
OPERATION
3.7
Settings Menu
Settings
MEASUREMENT
OUTPUTS
MODBUS
Figure 16
HMI
ETHERNET
RTC
ABOUT
Settings Menu Screen
Allows access to the following sub menus to change instrument settings.
22
•
Measurement
•
Outputs
•
HMI
•
RTC
•
Modbus
•
Ethernet
•
About
97450 Issue 1, July 2015
QMA401 User’s Manual
3.7.1
OPERATION
Measurement Screen
Measurement
Carrier Gas
Ar
DP Calculation
ISO
Pressure Input
Atmos
Measurement
Carrier Gas
Ar
Pressure Input
Fixed
DP Calculation
ISO
Fixed
1.00
Pressure Unit
barg
External
Measurement
Carrier Gas
Ar
Pressure Input
DP Calculation
ISO
Ext. 4mA
0.00
Ext. 20mA
160.00
Figure 17
Michell Instruments
Measurement Screen
23
QMA401 User’s Manual
OPERATION
Parameter
Carrier Gas
Description
Toggles through the different carrier gas options.
Available Options: Air, Ar, CH4, C2H2, C2H4, C2H6, C3H6, C3H8,
C4H10, CO, CO2, H2, He, Kr, N2, Ne, NH3, NO, N2O, O2, Xe, User 1,
User 2, User 3
User Gas Entry: If a User option is chosen in Carrier Gas then this
Parameter will show on the Measurement Page.
Sets the frost point calculation method.
DP Calculation
Pressure Input
Available Options: ISO (ISO 18453), Ideal Gas, IGT (IGT Bulletin
#8)
Selects the pressure source.
Available Options:
Atmos – Atmospheric pressure.
Fixed – User-settable fixed value.
When the Fixed option is chosen it enables a fixed value to be entered.
External – An externally connected pressure transducer.
When the External option is chosen it enables the choice of the zero
and span range pressure transducer values of 4 or 20mA.
Table 5
24
Measurement Screen Parameters
97450 Issue 1, July 2015
QMA401 User’s Manual
3.7.2
OPERATION
Outputs Screen
Outputs
Output 1
Parameter
H2O ppmV
Min
Output
Selector
Parameter
Output Type
Min
Max
0.00
Outputs Screen
Description
Selects Output required.
Available Options: Output 1, Output 2
Toggles through the different output parameters.
Available Options: Oven ˚C, ml/min, Cell Pr. barg, External Pr. barg,
H2O ppmV, H2O ppmW, H2O mg/m3, WVP Pa, lb/MMscf, DP ˚C
Toggles the signal type of the output.
Available Options: 1-5 V, 4-20 mA
Selects the lower output limit for the corresponding output.
Selects the higher output limit for the corresponding output.
Table 6
Michell Instruments
4-20mA
Max
0.00
Figure 18
Parameter
Output Type
Outputs Screen Parameters
25
QMA401 User’s Manual
OPERATION
3.7.3
HMI Screen
HMI
Language
English
Temperature Unit
Chart Period
30 mins
Pressure Unit
Brightness
100
Figure 19
Parameter
barg
ml/min
HMI Screen
Description
Toggles through the different languages available.
Language
Chart Period
Brightness
Temperature Unit
Pressure Unit
Flow Unit
Table 7
26
Flow Unit
°C
Selects the time scale of the chart.
Available Options: 5 mins, 30 mins, 1 hr, 5 hrs, 10 hrs,
24 hrs
Sets the screen brightness level in %.
Available Options: 5 - 100%
Toggles through displayed temperature units.
Available Options: °C, °F
Selects the units in which the pressure measurements
are displayed.
Available Options: barg, bara, psig, psia, MPa, mmHg
Selects the flow units.
Available Options: ml/min, sccm/min
HMI Setup Screen Parameters
97450 Issue 1, July 2015
QMA401 User’s Manual
3.7.4
OPERATION
Real Time Clock Screen
RTC
Day
31
Hour
23
Month
12
Minute
59
Year
13
Save Date
Yes
Save Time
Yes
04/02/2015
Live Time
Live Date Value
Figure 20
Parameter
Day / Month / Year
Hour / Minute
Save Date
Save Time
Real Time Clock Screen
Description
Sets the current date for the real time clock.
Sets the current time for the real time clock.
Saves the updated date.
Saves the updated time.
Table 8
Michell Instruments
12:44
Real Time Clock Screen Parameters
27
QMA401 User’s Manual
OPERATION
3.7.5
ModBus Screen
ModBus
1
ModBus ID
Figure 21
Parameter
ModBus Screen
Description
Sets the instrument address using the keypad.
Instrument Address
Toggles different physical layer types.
Available Options: RS485 / USB / TCP/IP
Protocol
Table 9
3.7.6
RS485
Protocol
Modbus Screen Parameters
Ethernet Screen
Ethernet
IP Address
0
0
0
0
Subnet Mask
0
0
0
0
Default Gateway
0
0
0
0
Figure 22
Parameter
IP Address
Subnet mask
Default gateway
Description
Instrument's static IP address on the network.
Subnet mask of network that the instrument is on.
The default gateway of the network that the instrument is
on.
Table 10
28
Ethernet Screen
Ethernet Screen Parameters
97450 Issue 1, July 2015
QMA401 User’s Manual
3.7.7
OPERATION
About Screen
About
V1.01
V1.00
V1.25
12345
12346
Control Firmware
Oscillator Firmware
Display Firmware
Instrument SN
Oscillator SN
Michell Instruments
QMA401 Trace Moisture Analyzer
www.michell.com
SERVICE
About Screen
Figure 23
Displays the instrument firmware versions, and serial numbers.
Service Screen
This screen is password protected and is only available to Michell authorized personnel.
To return to the Configuration Screen press the ESC key.
About
Control Firmware
Oscillator Firmware
Display Firmware
Instrument SN
Oscillator SN
5
6
7
0
1
2
+
V1.01
V1.00
V1.25
12345
12346
8
9
3
4
OK
Michell Instruments
QMA401 Trace Moisture Analyzer
www.michell.com
Figure 24
Michell Instruments
SERVICE
Service Screen
29
QMA401 User’s Manual
OPERATION
3.8
Sampling Guidelines
The QMA401 Trace Moisture Analyzer is designed to operate in a flowing gas stream
and is suitable for the measurement of the moisture content of a wide variety of gases.
In general, if the gas (in conjunction with water vapor) is not corrosive to the sampling
system and the sensor base metals then it will be suitable for measurement by the
QMA401.
The analyzer is designed to automatically regulate the flow rate. However, the sample
pressure and back pressure must match what is shown on the calibration certificate typically 1 barg (14.5 psig) sample pressure with the oulet at atmospheric pressure, and
should be controlled using a high-quality pressure regulator on the gas inlet and a back
pressure regulator on the outlet.
General guidelines to be followed when setting-up a sampling system are as follows:
•
Ensure that the sample is representative of the gas under test
To ensure that the sample
point should be as close
sample from the bottom
instrument’s sample input
•
is representative of the process being monitored, the sample
to the critical measurement point as possible. Also, never
of a pipe where entrained liquids may be drawn into the
line.
Minimize the ‘dead space’ in sample lines
Dead space in sample lines causes moisture entrapment points, increased system
response times or measurement errors as the trapped moisture is released into passing
sample gas, producing an increase in partial vapor pressure.
Avoid the use of too many T-pieces, in-line couplings or other unnecessary pipework.
Sample pipework should, ideally, be specially designed for each application rather than
adapted from that previously installed for another application. Dead space in sample
lines increases response time by holding water molecules which are more slowly released
to the passing gas sample.
30
97450 Issue 1, July 2015
QMA401 User’s Manual
•
OPERATION
Remove any particulate matter or oil from the gas sample
Particulate matter can damage the sensors. If particulate matter, such as degraded
desiccant, pipe scale and rust are likely to be present in the sample gas, use a particulate
in-line filter. Michell Instruments’ technical sales department can be contacted for advice.
•
Use high quality sample pipe fittings
The sample pipework must be capable of withstanding the operating pressure of the
sample line. Wherever possible, always use stainless steel pipework and fittings. This
is particularly important at low dew points since other materials, e.g. nylon, have
hygroscopic characteristics and adsorb moisture on the tube walls, giving rise to
slower measurement response and, under certain circumstances, false dew points. For
temporary applications, or where stainless steel pipework is not practicable, use high
quality, thick-walled PTFE piping, which exhibits similar qualities to stainless steel.
In order to maximize response time, always use the shortest run of pipework and the
smallest bore possible, taking care not to induce pressure differentials by aiming for
too high a flow rate through too small a bore. Michell Instruments supplies a range of
precision pressure fittings suitable for use with the QMA401 instrument. Contact Michell
Instruments for details of the items available.
•
Gas samples
Generally, if the sample gas (in conjunction with water vapor) is not corrosive to base
metals, it will be suitable for measurement by the QMA401 instrument. Gases containing
entrained solids should be filtered before application to the instrument.
Care should be taken with gas mixtures containing potentially condensable components
in addition to water vapor, e.g. oil, to ensure that only water vapor is present in
the sample. Once present on the surface of the sensors, oil will not dry out and will
contaminate and damage them.
•
Material of construction
All materials are permeable to water vapor, as the water molecule is extremely small
compared to the structure of solids, even when compared to the crystalline structure
of metals.
Many materials contain moisture as part of their structure, particularly organic materials,
salts and anything which has small pores. It is important to ensure that the materials
used are suitable for the application.
If the partial water vapor pressure exerted on the outside of a compressed air line is
higher than on the inside, the atmospheric water vapor will naturally push through
the porous medium against a dry air water vapor pressure. Water will migrate into the
pressurized air line, this effect is called transpiration.
Over a long pipe run water will inevitably migrate into any line even through the most
resistant materials. Moisture on the outlet of the line will be different than on the inlet.
The best material to resist transpiration is 316L stainless steel.
Michell Instruments
31
OPERATION
QMA401 User’s Manual
It is also important to note that temperature changes can increase the tendency of
these materials to affect the humidity of the surrounding air. With a given surface and
gas composition, increases of line pressure and decreases in temperature increase
surface adsorption.
•
Pipe material surface finish
Components with a smooth mechanical finish are always preferred. Do not confuse the
term electro-polished with a mechanical polishing procedure. Electro-polishing normally
is preceded by mechanical polishing to achieve the best results. If a choice of finish
is available for the materials dictated by the process or sample system, select the
smoothest for faster response.
•
Pipe diameter
The larger the sampling pipe diameter, the more exposed the gas will be to the pipe wall.
Therefore it is recommended to use the smallest possible pipe diameter to minimize the
previously mentioned effects. This must be balance with the desired response speed.
Depending on the configuration 1/8” pipe diameter is recommended. Please contact
Michell Instruments if further recommendations are needed.
•
Ambient temperature variation
The QMA401 is extremely sensitive to moisture fluctuations and ambient temperature
variations will affect the equilibrium conditions. In a stable environment, the water
vapor pressure within a closed system is in equilibrium with the outside ambient. If the
ambient temperature increases, the energy is imparted to the gas pipes and the water
molecules within the wall. This additional energy will upset the original equilibrium and
the increased pressure water in the walls migrates in towards the drier gas stream.
Small molecules such as water will migrate through the pipe wall until the entire system
reaches a new equilibrium. It is possible to minimize this effect on a sampling system
by heat tracing sample lines and insulating/heating the sampling system enclosure to a
stable temperature above the maximal ambient temperature.
It is important to control the temperature of all components of the sampling system,
including regulators and lines. For this reason it is strongly advised to use heat traced
line to eliminate this temperature change effect and measure moisture content solely
related to the gas under test.
32
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3.9
OPERATION
Measurement Cycle
At the beginning of a measurement cycle V1 is energized. This allows the dried sample
gas to be routed to the sensor cell for a period of 30 seconds as shown by the red line
in Figure 25. During this first phase of the measurement cycle the frequency difference
between the sensor and reference crystals is measured (i.e. dry state).
The sample and calibration gas paths are shown in green. These lines are continually
purged during the initial measurement cycle.
SAMPLE
IN
DD
HE1
HE2
MG
V1
V2
V3
FC2
FC1
FC3
QCH
PS
MFC
SAMPLE
OUT
Key
DD
MFC
Desiccant column
QCH
PS
Sensor cell
Mass flow controller
Pressure sensor
Figure 25
Michell Instruments
MG
V1, V2, V3
Moisture generator
HE1, HE2
FC1, FC2, FC3
Heat exchanger
Solenoid Valves
Flow control
Measurement Cycle (Phase 1) - Dried Sample Flow
33
QMA401 User’s Manual
OPERATION
After a 30 second sampling period, V1 is de-energized. This cuts off the dried gas supply
to the sensor cell and V3 is energized connecting the sample gas (red line - see Figure
26) to the sensor cell for a further period of 30 seconds. The reference and sample gas
paths are shown in green. These lines are continually purged during this second phase
of the measurement cycle.
SAMPLE
IN
DD
HE1
HE2
MG
V1
V2
FC1
V3
FC2
FC3
QCH
PS
SAMPLE
OUT
MFC
Key
DD
MFC
Desiccant column
QCH
PS
Sensor cell
Mass flow controller
Pressure sensor
Figure 26
MG
V1, V2, V3
Moisture generator
HE1, HE2
FC1, FC2, FC3
Heat exchanger
Solenoid Valves
Flow control
Measurement Cycle (Phase 2) Calibration Flow
During this second phase of the measurement cycle the frequency difference between
the reference and sensor crystals is measured again (i.e. wet state). After signal
processing the measured difference in frequency between the wet and dry phases is
proportional to the moisture content of the sample gas.
34
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QMA401 User’s Manual
3.10
OPERATION
Calibration Cycle
To maintain the precision of the analyzer, the unit can self calibrate and adjust its
internal reference table based on the result.
This is achieved as follows:
An internal moisture generator uses a permeation tube to generate a nominal moisture
content of 0.5, 5 or 50 ppmV, depending on what was specified at the time of order.
The calibration is carried out in a two phase cycle. Initially V1 is energized, causing the
dried sample gas to be routed to the sensor cell for a period of 30 seconds, as shown
by the red line in Figure 27.
SAMPLE
IN
DD
HE1
HE2
MG
V1
V2
V3
FC2
FC1
FC3
QCH
PS
MFC
SAMPLE
OUT
Key
DD
MFC
Desiccant column
QCH
PS
Sensor cell
Mass flow controller
Pressure sensor
Figure 27
Michell Instruments
MG
V1, V2, V3
Moisture generator
HE1, HE2
FC1, FC2, FC3
Heat exchanger
Solenoid Valves
Flow control
Calibration Cycle (Phase 1) - Dried Sample Flow
35
QMA401 User’s Manual
OPERATION
At the close of this 30 second sampling period, V1 is de-energized, and V2 is energized;
so that the reference gas from the moisture generator is now routed to the sensor cell.
This is the beginning of phase 2, see Figure 28.
The calibration reference gas is measured for a further 30 seconds, until V2 is deenergized and the cycle begins again.
The inactive sample paths are continually purged during each phase (see green flow
paths on Figures 25 and 26).
SAMPLE
IN
DD
HE1
HE2
MG
V1
V2
FC1
V3
FC2
FC3
QCH
SAMPLE
OUT
MFC
PS
Key
DD
MFC
Desiccant column
QCH
PS
Sensor cell
Mass flow controller
Pressure sensor
Figure 28
MG
V1, V2, V3
Moisture generator
HE1, HE2
FC1, FC2, FC3
Heat exchanger
Solenoid Valves
Flow control
Calibration Cycle (Phase 2) - Sample Flow
The analyzer will run though a number of 'settling cycles' to ensure the internal sample
system is fully equilibrated with the calibration gas before beginning to collect calibration
data.
After the system has carried out the selected number of settling cycles, it begins the
calibration cycles. During these cycles, the difference between the calibration reference
gas and the dried gas is measured. As the moisture content of the calibration gas is
known, the difference between this and the measured value is equal to the error in the
system.
The QMA401 stores this measured calibration value and automatically compensates
subsequent sample readings for any offset that may have occurred to the factory
calibration curve.
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4
MAINTENANCE
MAINTENANCE
Gas line connections to the measurement system must be
isolated and de-pressurized before any work commences.
!
Any loose or disturbed pipework or couplings must be leak
tested.
The design of the QMA401 and measurement system is such that minimal maintenance
is required. However, if a fault does occur with the system that is not covered within this
manual please contact Michell Instruments (see contact information at www.michell.
com) or your local representative.
Any maintenance of this product should only be conducted by suitably trained personnel.
Any unauthorized maintenance of this product not covered by this manual could
invalidate the product warranty.
In addition to general maintenance procedures which involve the cleaning of the
instrument’s casing and display, the desiccant column can be removed and replaced by
the operator.
Michell Instruments
37
MAINTENANCE
4.1
QMA401 User’s Manual
Removal and Replacement of the Power Supply Fuse
The fuse can be serviced in the field by an approved Michell Instruments' service
technician. Please consult your Michell service representative for spare or replacement
parts.
4.2
38
Removal and Replacement of the Desiccant Column
1.
Undo thumbscrews to remove dryer access panel.
2.
Remove supplied spanner/wrench from the mount on the dryer access
panel.
3.
Loosen the VCR fittings on the dryer assembly using the supplied spanner/
wrench.
4.
Disconnect the VCR fittings by hand.
97450 Issue 1, July 2015
QMA401 User’s Manual
MAINTENANCE
5.
Remove dryer assembly.
6.
Fit replacement dryer assembly, following these instructions in reverse to
re-assemble.
Michell Instruments
39
CALIBRATION
5
CALIBRATION
5.1
Traceability
QMA401 User’s Manual
The calibration of this analyzer is traceable to national standards. For this reason the
analyzer can only be calibrated in an accredited e.g. NPL (UK) or NIST (US) standards
laboratory.
If these facilities are not available the analyzer must be returned to the manufacturer,
Michell Instruments, or one of their approved agents. A list of worldwide Michell
Instruments’ offices is provided at www.michell.com.
The analyzer is calibrated at a fixed pressure over the sensing crystals, and the analyzer’s
calibration is only valid while the inlet pressure and back pressures have been set
correctly.
The Auto function can be disabled for calibration purposes (see Section 3.6.4).
A calibration certificate bearing a nine point calibration is issued with each analyzer. If
required, an option is available to add further specific calibration points by contacting
Michell Instruments. A list of worldwide Michell Instruments’ offices is provided at www.
michell.com.
Figure 29 shows a typical calibration certificate.
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97450 Issue 1, July 2015
QMA401 User’s Manual
Figure 29
Michell Instruments
CALIBRATION
Typical QMA401 Calibration Certificate
41
APPLICATION SOFTWARE
6
QMA401 User’s Manual
APPLICATION SOFTWARE OVERVIEW
With the QMA Application Software you can:
•
Read and edit all main analyzer parameters
•
Chart and log all main analyzer parameters
•
Perform a calibration
•
Reset the analyzer to factory defaults
Communication between the application software and analyzer is via Modbus RTU over
RS485.
6.1
System Requirements
For the best software performance, the host computer should meet the following
minimum requirements:
O/S
CPU
RAM
Disk space
6.2
Windows XP, Windows VISTA, Windows 7 (32-bit or 64-bit), Windows 8
(32-bit or 64-bit)
Intel Pentium III 500 MHz (recommended: Pentium 4 1.6 GHz or Pentium
M 1.0 GHz, or Athlon 1.2 GHz or higher)
512 MB (recommended: 1.0 GB)
Application = 3 MB
System Connection
If using an RS485 connection - connect the communications cable and RS485 to RS232
converter to a spare serial port or serial to USB adaptor on the host computer.
If using USB - connect the analyzer directly to the host computer using a USB cable
after installing the application software.
If using Modbus TCP - connect the analyzer to a LAN using an Ethernet cable.
For information the default serial settings are:
Baud
Parity
Data bits
Stop bits
42
9600
NONE
8
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6.3
APPLICATION SOFTWARE
Getting Started
On launching the software the connection console will appear, allowing you to establish
communications between the software and QMA analyzer.
Choose the Modbus slave address (default is 1) and the serial COM port that the
instrument is connected to. (NOTE: TCP is not supported in this instrument).
Click the 'Connect...' button.
After a few seconds the software will report a successful connection or not. If the
connection is successful, the word 'Connected' and a green tick will appear.
Click the 'Continue' button to continue onto the main acquisition window.
Michell Instruments
43
APPLICATION SOFTWARE
6.3.1
QMA401 User’s Manual
Connection Method (Serial Connection (RS485 or USB)
Select the COM port to which the analyzer is connected.
6.3.1.1 RS485 Connection
An RS485 to RS232 converter must be used when connecting to a computer's built in
serial port, or when connecting to a RS232 to USB adaptor.
To find the COM port number of assigned to a USB to RS232 adapter, open Windows
'device manager' and expand the 'Ports (COM & LPT)' branch.
The USB to RS232 adapter should be listed in this branch, together with the COM port
number.
6.3.1.2 USB Connection
If directly connecting via USB, the analyzer will appear in Device Manager as a virtual
serial port with the name 'Michell Instruments USB to UART Bridge Controller', followed
by its assigned COM port number, e.g. COM3.
6.3.1.3 Modbus TCP Connection (Ethernet)
Enter the IP address and port number of the analyzer.
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6.4
APPLICATION SOFTWARE
Main Window
The application software will automatically begin acquiring, displaying and charting
data from the analyzer once a connection has been established.
Data acquisition occurs approximately every 2 seconds. The chart update rate is 2
seconds but this may be changed by using the chart options window.
Data logging does not start automatically, this is indicated by the text 'NOT LOGGING'
on the Main Screen. Click the 'Data Logging' button to launch the data logging setup
window.
To configure analyzer parameters, click the 'Parameters / Field calibration' button to
launch the parameters window.
Click the 'Connect' button to re-connect with the analyzer or connect with a new analyzer.
Michell Instruments
45
APPLICATION SOFTWARE
6.5
QMA401 User’s Manual
Using the Chart
Chart mode buttons
The chart defaults to plot mode.
To change the chart mode, click one of the buttons along the top of the chart, described
below.
Function
PLOT
SCROLL-X
SCROLL-Y
SIZE-X
SIZE-Y
ZOOM BOX
OPTIONS
Description
Puts chart into live plot mode
Allows the user to scroll the X-axis left and right
Allows the user to scroll the Y-axis up and down
Allows the user to size the X-axis
Allows the user to size the Y-axis
Allows the user to draw a box in the data area which will zoom in on
the data within the box.
The box is drawn from top-left to bottom-right
Invokes the chart options window
After using the scroll. size or zoom modes, changing the chart back to plot mode resets
the X and Y axes.
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6.5.1
APPLICATION SOFTWARE
Chart Options Window
The Chart Options Window allows the user to configure the following chart properties:
Function
Show/hide series
Restore on plot mode
Y-axis scale
Update rate
Reset chart
Michell Instruments
Description
Allows the user to show or hide data series from the chart.
Tick to show, untick to hide
When ticked, selecting plot mode will restore the X and Y axis
to the state before they were modified (after sizing, zooming or
scrolling)
Select either 'autoscale all data' or 'manual scaling' of the Y-axis.
Selecting manual scaling will show a min and max input text box
Allows the user change the update rate of the chart
Clears all chart data
47
QMA401 User’s Manual
APPLICATION SOFTWARE
6.6
Data Logging
Click the 'Data Logging' button on the Main Window to launch the Data Logging Setup
Window.
Choosing a log file filename
Choose a log file manually by clicking the
button.
Click the 'Auto generate' button to generate a filename based on the current date and
time.
An auto generated log file filename has the following format:
QMA dd-mm-yy hh:mm:ss.log
- where dd = date, mm = month, yy = year, hh = hour (24 hr), mm = minutes and ss
= seconds
Example:
QMA 15-12-14 13.41.55.log
which is 15th December 2014 at 1.41.55 pm
Auto generated log files are stored in the local My Documents folder
C:\Users\username\Documents\
C:\Documents and Settings\username\Documents\
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6.6.1
APPLICATION SOFTWARE
Configuring Logging Start Time
Logging may be started immediately or at a user-defined time in the future.
To start logging immediately, select the 'Start when START is clicked' option.
To start logging at a user-defined time in the future, select the 'Start at this date/time:'
option and enter the date and time when you wish to start logging.
6.6.2
Configuring Logging Stop Time
If the 'Stop when STOP is clicked' option is selected, then the software will continue
logging indefinitely until either the 'STOP' button is clicked or the software is shut down.
If the 'Stop at this date/time:' option is selected then the software will continue logging
until the selected date and time is reached or when the 'STOP' button is clicked or the
software is shut down.
6.6.3
Starting the Log
After choosing a filename and configuring logging start and stop times, click the 'START'
button.
6.6.4
Viewing a Log
Click the 'view log file' button to view a log file within Windows notepad.
6.7
Parameters / Field Calibration
Analyzer parameters may be viewed and edited via this window.
Current (live) values are shown in the 'Value now' column. New values may be entered
in the 'Adjust' column. When a value is modified it will be shown in red and the 'Apply'
button will enable.
Click the 'Apply' button to apply the modified values to the analyzer.
To write the PC date and time to the analyzer, first click the 'Get PC date/time' button
to load the values into their respective positions on the screen, then click the 'Apply'
button.
To reset the analyzer to factory defaults, press the 'Do it...' button under the Factory
Defaults heading.
Michell Instruments
49
APPLICATION SOFTWARE
6.7.1
QMA401 User’s Manual
Field Calibration
This window allows manual analyzer calibrations to be performed, and settings for
automatic calibrations configured.
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7
SHIPPING
7.1
Preparation for Shipping and Packing
SHIPPING
For shipping purposes, the instrument should be packed into its original carton, the
latter providing the recommended degree of protection during transit.
To prepare the instrument for shipping, proceed as follows:
1.
Switch off the instrument, isolate the power supply and remove the power
supply cable.
2.
Remove the analog connector and alarm output connectors.
3.
Isolate the incoming sample line and remove the connections to the GAS
IN and GAS OUT ports.
4.
Pack the instrument in its original case by first fitting the end packing,
and lowering the instrument into the carton. Place any accessories being
returned in the accessories box and place in the carton last.
5.
Create a packing list detailing all equipment contained in the box, place it
inside the box and seal the box. Ideally, for extra security, the box should
be banded.
Michell Instruments
51
APPENDIX A
QMA401 User’s Manual
Appendix A
Technical Specifications
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Appendix A
APPENDIX A
Technical Specification
Performance
Measurement
Technology
Range
Accuracy
Repeatability
Detection Limit
Available Units
Response Speed
Self Verification
Sensitivity
Fast Response Quartz Crystal Microbalance
Calibrated range 0.1 - 700 ppmV
Indication to 2000 ppmV
±10% of reading from 1 to 2000 ppmV
±0.1 ppmV between 0.1 & 1 ppmV
±5% of the reading from 1 to 2000 ppmV
±0.1 ppmV between 0.1 & 1 ppmV
0.1 ppmV
ppmV, ppmW, mg/Nm3, vapor pressure (Pa), frost point (°C), lbs/MMscf
T63 <2 mins to step change in either direction
T95 <5 mins to step change in either direction
Internal moisture generator source calibrated traceable to NPL & NIST
0.1ppmV or 1% of reading, whichever is greater
Electrical Specifications
Supply Voltage
Alarms
Communications
Data logging
Local Interface
85 to 264 V AC, 47/63Hz, 110 to 300 V DC
1 x System Alarm, volt-free change-over (FORM C)
3 x process alarms, selectable for various parameters, volt free changeover (FORM C)
Analog Outputs: 2 channels, user selectable 4-20 mA or 1 to 5 V
Digital Communications: RS485/USB Modbus RTU, Ethernet Modbus TCP
Logging to SD card at user-selectable interval
7” color touch screen LCD
Operating Conditions
Inlet Pressure
Outlet Pressure
Sample Flow
Sample Gas
Temperature
Operating Environment
1 barg (14.5 psig)
Atmospheric
300ml/min total flow without bypass
0 to +100°C
+5 to +45°C (+41 to +113°F) up to 90% RH
Mechanical Specifications
Enclosure
Gas Connections
Weight
Michell Instruments
19" Rackmount, 4U x 434mm
1/4” VCR(M)
13.5 kg (29.8 lbs)
53
APPENDIX B
QMA401 User’s Manual
Appendix B
Modbus Register Map
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Appendix B
APPENDIX B
Modbus Holding Register Map
All the data values relating to the QMA401 Trace Moisture Analyzer are stored in holding registers.
Each of these registers is two bytes (16-bits wide). Some of these registers contain instrument
specific values e.g. its own unique system address, IP address values, etc. Others registers hold
specific real time data e.g. measured dew-point and temperature.
Each Modbus message has a two part address code, one for the low byte (bits 0 through 7) and one
for the high byte (bits 8 through 15). The facility exists for multiple registers, specified by a high and
low byte contained in the query message, to be addressed and read by the same message.
The table below describes the instruments' registers with their respective address locations, together
with their relevant register configurations and register map definitions. Note: Hexadecimal (Hex)
addresses marked with an asterisk denote instrument specific parameters stored in the
instrument’s flash memory.
The register maps below the table define the data allocated to each bit/byte for each register type.
Address
#
0
1
2
3
Function Description
ModBus Configuration
System Configuration
Alarm Configuration
Analog Output Configuration
Read/
Write
R/W
R/W
R/W
R/W
Default
Register
Config
C
D
E
F
4
Internal Logging
Configuration
R/W
U
5
MFC Span in mlm / Gas
Number for flow rate and mol
weight correction
R/W
S
6-8
** INTERNAL USE ONLY **
X
X
X
9
Fault Relay Alarm fault
selection mask
R/W
10
Dryer Capacity (ppm) / Moist
Gen Capacity (days)
R/W
255 /
103
V
11
** INTERNAL USE ONLY **
X
X
X
12
Alarm1 – Low Set point
R/W
See Appendix
B1
13
Alarm1 – High Set point
R/W
See Appendix
B1
14
Alarm2 – Low Set point
R/W
See Appendix
B1
15
Alarm2 – High Set point
R/W
See Appendix
B1
16
Alarm3 – Low Set point
R/W
See Appendix
B1
17
Alarm3 – High Set point
R/W
See Appendix
B1
18
Analog Out 1 – Low Set point
R/W
See Appendix
B1
19
Analog Out 1 – High Set point
R/W
See Appendix
B1
20
Analog Out 2 – Low Set point
R/W
See Appendix
B1
Michell Instruments
Notes/ Real Value
Range
DO NOT WRITE TO
M
DO NOT WRITE TO
55
QMA401 User’s Manual
APPENDIX B
21
Analog Out 2 – High Set point
R/W
See Appendix
B1
22
Fixed Pressure Input Value
R/W
See Appendix
B1
23
Next Calibration –
Configuration
R/W
P1
24
User low ppmV limit
R/W
A3
25
Next Calibration – Intervals
between cal
R/W
P2
26
Next Calibration – External
Cal Val – Hi Word
R/W
I
0.01 to 2000.00
ppmv
27
Next Calibration – External
Cal Val – Lo Word
R/W
I
0.01 to 2000
.00ppmv
28
Last Cal Day/Month/Year
R
J
29
Last Cal Details (can write
correction factor)
R/W
K
30
Last Cal -1 Day/Month/Year
R
J
31
Last Cal -1 Details
R
K
32
Last Cal Date – 2 Day/Month/
Year
R
J
33
Last Cal Details – 2 Details
R
K
34
Last Cal Date -3 Day/Month/
Year
R
J
35
Last Cal Details – 3 Details
R
K
36
Last Cal Date -4 Day/Month/
Year
R
J
37
Last Cal Details – 4 Details
R
K
38
User Gas Flow Correction Val1
R/W
A4
0.100 to 10.000
39
User Gas Flow Correction Val2
R/W
A4
0.100 to 10.000
40
User Gas Flow Correction Val3
R/W
A4
0.100 to 10.000
41
User Gas Mol Weight Val1
R/W
A3
0.10 to 500.00
42
User Gas Mol Weight Val2
R/W
A3
0.100 to 500.00
43
User Gas Mol Weight Val3
R/W
A3
0.100 to 500.00
44
Ext (line) Pressure Sensor Min
R/W
See Appendix
B1
45
Ext (line) Pressure Sensor
Max
R/W
See Appendix
B1
46-56
X
X
X
DO NOT WRITE TO
57
*Instrument Serial Number HI
WORD
R/W
32 bit Integer
HI Word
1 to 4294967296
58
*Instrument Serial Number
LO WORD
R/W
32 bit Integer
LO Word
“
59
** INTERNAL USE ONLY **
X
60
*Osc FW Version Hi Word
R
I
61
*Osc FW Version Lo Word
R
I
** INTERNAL USE ONLY **
X
62-185
56
** INTERNAL USE ONLY **
0.00 to 0.10
X
X
X
DO NOT WRITE TO
X
DO NOT WRITE TO
186
*Osc Serial Number HI
WORD
R/W
32 bit Integer
HI Word
1 to 4294967296
187
*Osc Serial Number LO
WORD
R/W
32 bit Integer
LO Word
“
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188-194
APPENDIX B
** INTERNAL USE ONLY **
X
195
Passcode for protected
registers
196
X
DO NOT WRITE TO
W
A1
(NOT USED
CURRENTLY)
RTC Set Hours/Mins
W
H
Write to set Time
197
RTC Set Day/Month/Year
W
J
Write to set Date
198
Instrument Command
Register
W
T
199
** INTERNAL USE ONLY **
X
200
Main Board f/w version
R
A3
201
Moisture – PPMv – Hi Word
R
I
202
Moisture – PPMv – Lo Word
Moisture – PPMw – Hi
Word
Moisture – PPMw – Lo
Word
Moisture – mg/m3 – Hi
Word
Moisture – mg/m3 – Lo
Word
Moisture – Pa – Hi Word
Moisture – Pa – Lo Word
Moisture – lb/mmscf – Hi
Word
Moisture – lb/mmscf – Lo
Word
Dew point Hi Word in set
unit
Dew point Lo Word in set
unit
Enclosure Temperature in
set unit
Ext Pressure Reading in set
unit
DeltaF Hi Word
DeltaF Lo Word
Beat Frequency Hi Word
Beat Frequency Lo Word
Oven Temperature in set
unit
Flow Rate in ml/m
Heater Power in %
RTC Hours/Minutes
RTC Seconds
RTC Day/Month/Year
Ref Seconds / Sample
Seconds Countdown
Pressure Reading of cell in
set unit
R
I
R
I
R
I
R
I
R
I
R
R
I
I
R
I
R
I
R
I
R
I
R
B2
R
See Appendix
B1
R
R
R
R
I
I
I
I
R
B3
R
R
R
R
R
A2
A2
H
A1
J
R
Q
R
See Appendix
B1
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
Michell Instruments
X
X
X
DO NOT WRITE TO
57
QMA401 User’s Manual
APPENDIX B
227
228
229
230
231
232
233
234
235
X
X
X
DO NOT WRITE TO
R
Q
R
R
L
M
R
A4
R
I
For cal use
R
I
For cal use
R
P2
R
Q
236
10 Sample Averaged DeltaF
Hi Word
R
I
Average of 10
deltaF Logs - For
cal use
237
10 Sampled Averaged
DeltaF Lo Word
R
I
“
238
10 Sample Averaged Ppmv
Hi Word
R
I
Average of 10
ppmv Logs - For
cal use
R
I
“
R
A1
R
A1
R
A1
R
V
239
240
241
242
243
244
245
246
247
248
249
250
251
252
58
** INTERNAL USE ONLY **
Cal Settling / Calibration
Cycles Countdown
System Status Register
Warning Flags Register
Current Flow Correction
value
Moist Gen Value Read After
Cal – Hi Word
Moist Gen Value Read After
Cal – Lo Word
Countdown to Next Cal
HHDD
Countdown to Next Cal
MMSS
10 Sampled Averaged
Ppmv Lo Word
Oven Temperature Live
Averaged ADC Val
Internal Pressure Live
Averaged ADC Val
External Pressure Live
Averaged ADC Val
Dryer Capacity Used /
Moist Gen Capacity Used
** INTERNAL USE ONLY **
Ethernet Settings – IP
Address – Upper Bytes
Ethernet Settings – IP
Address – Lower Bytes
Ethernet Settings – Subnet
Mask – Upper Bytes
Ethernet Settings – Subnet
Mask – Lower Bytes
Ethernet Settings – Def
Gateway – Upper Bytes
Ethernet Settings – Def
Gateway – Lower Bytes
** INTERNAL USE ONLY **
DeltaF Log t0 Hi Word
X
X
X
DO NOT WRITE TO
Volatile – Cannot
write via Modbus,
only via display
R/W
Q
R/W
Q
“
R/W
Q
“
R/W
Q
“
R/W
Q
“
R/W
Q
“
X
I
DO NOT WRITE TO
For cal use
X
R
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253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292-293
294
295
296
DeltaF Log t0 Lo Word
DeltaF Log t1 Hi Word
DeltaF Log t1 Lo Word
DeltaF Log t2 Hi Word
DeltaF Log t2 Lo Word
DeltaF Log t3 Hi Word
DeltaF Log t3 Lo Word
DeltaF Log t4 Hi Word
DeltaF Log t4 Lo Word
DeltaF Log t5 Hi Word
DeltaF Log t5 Lo Word
DeltaF Log t6 Hi Word
DeltaF Log t6 Lo Word
DeltaF Log t7 Hi Word
DeltaF Log t7 Lo Word
DeltaF Log t8 Hi Word
DeltaF Log t8 Lo Word
DeltaF Log t9 Hi Word
DeltaF Log t9 Lo Word
Ppmv Log t0 Hi Word
Ppmv Log t0 Lo Word
Ppmv Log t1 Hi Word
Ppmv Log t1 Lo Word
Ppmv Log t2 Hi Word
Ppmv Log t2 Lo Word
Ppmv Log t3 Hi Word
Ppmv Log t3 Lo Word
Ppmv Log t4 Hi Word
Ppmv Log t4 Lo Word
Ppmv Log t5 Hi Word
Ppmv Log t5 Lo Word
Ppmv Log t6 Hi Word
Ppmv Log t6 Lo Word
Ppmv Log t7 Hi Word
Ppmv Log t7 Lo Word
Ppmv Log t8 Hi Word
Ppmv Log t8 Lo Word
Ppmv Log t9 Hi Word
Ppmv Log t9 Lo Word
** INTERNAL USE ONLY **
Log Buffer Latest Log
Pointer
Log Buffer Main Val Min –
Hi_Word
Log Buffer Main Val Min –
Lo_Word
Michell Instruments
APPENDIX B
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
X
X
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
X
R
A1
R
I
R
I
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
For cal use
DO NOT WRITE TO
Points to start of
latest log
59
QMA401 User’s Manual
APPENDIX B
297
298
299
300
301
302
303
304
305
306
307
308
309
310
>>>
Log Buffer Main Val Max –
Hi_Word
Log Buffer Main Val Max –
Lo_Word
Log1 - Hours/Minutes
Log1 - Day/Month/Seconds
Log1 - Main Value - Hi_
Word
Log1 - Main Value - Lo_
Word
Log1 - System Status
Register
Log1 - Warning Flags
Register
Log2 - Hours/Minutes
Log2 - Day/Month/Seconds
Log2 - Main Value - Hi_
Word
Log2 - Main Value - Lo_
Word
Log2 - System Status
Register
Log2 - Warning Flags
Register
>>> To log288
Table 11
R
I
R
I
R
R
H
J
R
I
R
I
R
L
R
M
R
R
H
J
R
I
R
I
R
L
R
M
R
As above
Modbus Register Map
Register Configuration A
15
A1
A2
A3
A4
A5
—
—
—
—
—
14
13
Unsigned
Unsigned
Unsigned
Unsigned
Unsigned
Conversion:
12
11
10
9
8
7
6
5
4
3
2
1
0
5
4
3
2
1
0
Short. Range = 0 to 65535
Short/10. Range = 0 to 6553.5
Short/100. Range = 0 to 655.35
Short/1000. Range = 0 to 65.535
Short/1000. Range = 0 to 65.535
Float*x = unsigned integer
Unsigned integer/x = float
Or cast:
Float value to read = ((float)(value))/x;
Unsigned short value to write = (unsigned short)(value*x)
Register Configuration B
15
60
14
13
12
11
10
9
8
7
6
97450 Issue 1, July 2015
QMA401 User’s Manual
B1
B2
B3
B4
B5
—
—
—
—
—
Signed
Signed
Signed
Signed
Signed
APPENDIX B
Short. Range -32768 to +32767
Short/10. Range -3276.8 to +3276.7
Short/100. Range -327.68 to +327.67
Short/1000. Range -32.768 to +32.767
Short/10000. Range -3.2768 to +3.2767
Most languages will cast from one type to another
Values to write into register manually:
If value is a negative number:
If value is 0 or a positive number:
E.g. for type B3:
(-5.39*100)+65536 = 64997
(2.01*100) = 201
Or cast:
(Unsigned short)(value*x)
(value*x)+65536
value*x
Reading Values from register manually:
If value in register is greater than 32767:
If vaue in register is less than or equal to 32767:
E.g. for type B3:
(64997-65536)/100 = -5.39
201/100 = 2.01
Or cast:
((float)((signed short)value))/x;
(value-65536)/x
value/x
Register Configuration C — Modbus Configuration
15
14
13
12
11
10
9
PT
8
PT
Instrument Address (IA)
1 to 31 (1=def)
7
IA
6
IA
5
IA
4
IA
3
IA
2
IA
1
IA
0
IA
3
TU
2
LG
1
LG
0
LG
Protocol Type (PT)
00=RS485 (def)
01=USB VCP
10= Ethernet
Register Configuration D — System Configuration
15
DC
14
DC
13
DF
12
BF
11
BP
10
SS
9
PS
Temperature/Dew Point Units (TU)
00 = C (def)
01 = F
Michell Instruments
8
PS
7
PU
6
PU
5
PU
4
TU
Pressure for Dew-Point Calculations (PS)
00= Atmospheric (def)
01 = Fixed pressure (User input value)
10 = External Line pressure (Ext sensor)
61
QMA401 User’s Manual
APPENDIX B
Pressure Units (PU)
000 = Bar.G (def)
001 = Bar.A
010 = Psi.G
011 = Psi.A
100 = Mpa
101 = mmHg
Dew-Point Calculation Method to Use (DC)
00=IGT
01=ISO
10=Ideal Gas (def)
DeltaF Mean Filter (DF)
0 = Off
1= On (smooth's)
BeatF Median Filter (BF)
0=Off
1=On (reduces spikes)
LG, SS, BP are for future use
LG = Language
SS = Sensor Saver
BP = Bypass Solenoid
Note: when a pressure unit or temperature unit is changed then the user
must manually change the values for the following to the value in the new
selected unit (if relevant).
•
Fixed pressure for dew-point calculation
•
External line pressure sensor min and max
•
Alarm set-points
•
Analog output ranges (low and high)
Register Configuration E — Alarm Configuration
Note: Alarm 4 is a system fault/warning alarm and is configured in Reg 9
15
L4
14
L3
13
L2
12
L1
11
A3
Alarm1 Parameter (A1)
0000 = Moisture – PPMv (def)
0001= Moisture - PPMw
0010 = Moisture – MGM3
0011 = Moisture – PA (wvp)
0100 = Moisture - LBMMSCF
0101 = Dew point
0110 = Oven temperature
0111 = Flow rate
1000 = Cell Pressure
1001 = Ext Line Pressure
Alarm3 Parameter (A3)
0000 = Moisture – PPMv
0001= Moisture - PPMw
0010 = Moisture – MGM3
0011 = Moisture – PA (wvp)
0100 = Moisture - LBMMSCF
0101 = Dew point
0110 = Oven temperature
0111 = Flow rate (def)
1000 = Cell Pressure
1001 = Ext Line Pressure
62
10
A3
9
A3
8
A3
7
A2
6
A2
5
A2
4
A2
3
A1
2
A1
1
A1
0
A1
Alarm2 Parameter (A2)
0000 = Moisture – PPMv
0001= Moisture - PPMw
0010 = Moisture – MGM3
0011 = Moisture – PA (wvp)
0100 = Moisture - LBMMSCF
0101 = Dew point
0110 = Oven temperature (def)
0111 = Flow rate
1000 = Cell Pressure
1001 = Ext Line Pressure
Alarm Latch Control (L1 to L4)
L1 = 1 = Alarm1 latch
L2 = 1 = Alarm2 latch
L3 = 1 = Alarm3 latch
L4 = 1 = Alarm4 latch
L1 = 0 = Alarm1 don’t latch
L2 = 0 = Alarm2 don’t latch
L3 = 0 = Alarm3 don’t latch
L4 = 0 = Alarm4 don’t latch
97450 Issue 1, July 2015
QMA401 User’s Manual
APPENDIX B
Register Configuration F — Analog Output Config
15
14
13
12
11
10
9
T2
8
T1
Ouput1 Parameter (O1)
0000 = Moisture – PPMv (def)
0001= Moisture - PPMw
0010 = Moisture – MGM3
0011 = Moisture – PA
0100 = Moisture - LBMMSCF
0101 = Dew point
0110 = Oven temperature
0111 = Flow rate
1000 = Cell Pressure
1001 = Ext Line Pressure
Output Type – (T1 to T2)
0 = 4–20 mA
1 = 1–5V
(Where T1 is CH1 and T2 is CH2)
7
O2
6
O2
5
O2
4
O2
3
O1
2
O1
1
O1
0
O1
2
MM
1
MM
0
MM
Output2 Parameter (O2)
0000 = Moisture – PPMv
0001= Moisture - PPMw
0010 = Moisture – MGM3
0011 = Moisture – PA
0100 = Moisture - LBMMSCF
0101 = Dew point (def)
0110 = Oven temperature
0111 = Flow rate
1000 = Cell Pressure
1001 = Ext Line Pressure
Register Configuration H — Time (hours/minutes)
15
HH
14
HH
13
HH
12
HH
Hours Number (HH)
00 to 23
11
HH
10
HH
9
HH
8
HH
7
MM
6
MM
5
MM
4
MM
3
MM
Minutes Number (MM)
00 to 59
Register Configuration I — 32 bit Precision Floating Point Representation
IEEE-754 single precision floating point format. This format is 'Big Ended' which means that the
high byte is at a lower address in memory than the Lo byte, and is represented as such in the
register memory map. The IEEE-754 format is shown below.
Bit 31
Sign bit
0=+
1=-
Bits 30 to 23
Exponent Field
Has a +127 bias value
Bits 22 to 0
mantissa
Decimal representation of
binary. Where 1.0 <= value <
2.0
Examples of floating point to HEX are shown below:
1.
+10.3
sign bit = 0
Exponent = 3, therefore exponent field = 127 + 3 = 130 , and bits 30 to 23 = 10000010.
The mantissa = 1.2875 which in binary representation = 1 .01001001 1001 1001 1001 101.
Michell Instruments
63
QMA401 User’s Manual
APPENDIX B
Adjusting the mantissa for the exponent moves the decimal point to the right if positive and to the
left if negative. As the exponent is = 3 then the mantissa becomes = 1010.0100 1100 1100 1100 1
101, therefore:
1010 = (1x23) + (0x22) + (1x21) + (0x20) = 10 and
0100 1100 1100 1100 1101 = (0x2-1) +(1x2-2) + -- + (1x2-20) = 0.3
Therefore the word value
=
=
0100 0001 0010 0100 1100 1100 1100 1101
4124CCCD
Consequently hi word= 4124 and lo word = CCCD
2.
- 0.0000045
sign bit = l
Exponent = -18, therefore exponent field = 127 + (-18) = 109 , and bits 30 to 23 = 01101101.
The mantissa = 1.179648 which in binary representation = 1 .00101101111111010110101.
i.e. (1x2-18) + (1x2-21) + (1x2-23) etc.. = 0.0000045
Therefore the word value
=
=
1011 0110 1001 0110 1111 1110 1011 0101
B696FEB5
Register Configuration J — Date
15
DD
14
DD
13
DD
12
DD
11
DD
10
MM
9
MM
8
MM
Date Number (DD)
01 to 31
Year Number (YY) or Seconds
00-99 for year or 00-59 for seconds
7
MM
6
YY
5
YY
4
YY
3
YY
2
YY
1
YY
0
YY
3
CF
2
CF
1
CF
0
CF
3
SM
2
SM
1
CP
0
CP
Month Number (MM)
01 to 12
Register Configuration K — Historic Calibration Log — Details
15
MA
14
IE
13
12
11
CF
10
CF
9
CF
8
CF
Correction Factor (CF)
1 to 4000 /1000.0 = 0.001 to 4.000
Internal or External (IE)
0=Internal
1=External
7
CF
6
CF
5
CF
4
CF
Manual or Auto (MA)
0=Manual
1=Automatic
Register Configuration L — System Status Register — 229
15
A4
64
14
A4
13
A3
12
A3
11
A2
10
A2
9
A1
8
A1
7
SS
6
5
4
97450 Issue 1, July 2015
QMA401 User’s Manual
APPENDIX B
Cycle Phase (CP)
00= Reference phase
01= Sample Phase
10 = Cal Phase (internal or external)
Relay Alarm Status flags
Example:
A1 = 00=OK (relay de-energised)
A1 = 01=High (or Fault)(relay energised)
A1 = 10=Low (relay energised)
A1 = 11= Latched (relay latched but condition
now ok)
System Mode (SM)
00= Standby
01= Measurement
10 = Calibration
Setup Status (SS)
0 = Setup mode is OFF
1 = Setup mode is ON
Register Configuration M — System Warning Flags (Register 230)
15
14
13
12
Bit
HEX
0
0001
1
0002
2
0004
3
4
5
0008
0010
0020
6
0040
7
8
0080
0100
9
0200
10
11
0400
0800
12
1000
13
14
2000
4000
15
8000
11
10
9
8
7
6
5
4
3
2
1
0
Warning Condition
Oven temperature has not been stable within ±0.05C of setpoint for
continuous 10 minutes
(Process Alarms de-energised, Fault Alarm Active, both Analog
Outputs at 3.6mA or 0.9V)
Enclosure (System) temperature too high
(> Oven temperature setpoint -2°C)
MFC Flow control error (by >5ml/m of flow target)
Cell pressure sensor error (under 4 mA, over 20 mA or no signal)
Ext Press sensor error (under 4 mA, over 20 mA or no signal)
Internal moist generator drift, instrument excessive drift or desiccant
dryer deterioration requiring very large corr. factor (<0.2500 or
>4.000). In this case the correction factor would be set to 1.0
BeatF Under/Over acceptable range (<1500 Hz, >20000 Hz)
ppmV Over instrument range (>2000ppmV)
Oven temperature sensor fault (Process Alarms de-energised, Fault
Alarm Active, both Analog outputs at 3.6 mA or 0.9 V)
(ADC <10, >4000 counts)
mA output 1 error (o/c or high resistance at output)
mA output 2 error (o/c or high resistance at output)
Oscillator board comms. error or board not present
(checked on startup)
Ethernet Board comms. error or board not fitted (checked on startup)
Desiccant Dryer due for service or replacement (>5000000ppmV)
Internal Moisture Generator due for service or replacement
(>1030days)
Fault selection mask (in Register 9) allows user to set which condition(s) trigger the fault relay alarm.
Michell Instruments
65
QMA401 User’s Manual
APPENDIX B
Register Configuration P1 — Next Calibration Configuration
15
MA
14
IE
13
DH
12
MG
11
10
9
8
Manual or Auto (MA)
0 = Manual
1 = Auto
Data Hold (DH)
0 = off
1 = on
7
AC
6
AC
5
AC
4
AC
3
AC
2
AC
1
AC
0
AC
Internal or External (IE)
0 = Internal
1 = External
Data Hold Additional Cycles (AC)
0 to 240 cycles
Register Configuration P2 — Next Calibration Configuration — Intervals between cal
15
14
IH
13
IH
12
IH
11
IH
10
IH
9
ID
8
ID
Hour of Day (IH)
0 to 23
7
ID
6
ID
5
ID
4
ID
3
ID
2
ID
1
ID
0
ID
1
GN
0
GN
Interval Days (ID)
1 day to 365 days
Register Configuration Q — Various Parameters, High Byte and Low Byte
15
MS
14
MS
13
MS
12
MS
11
MS
10
MS
9
MS
8
MS
MFC Span in ml/m (MS)
0 to 2000 ml/m
7
MS
6
MS
5
MS
4
GN
3
GN
2
GN
Gas Number (GN)
0 to 23 Gases (see Appendix B2 for details).
Register Configuration T — Instrument Setup and Command Register (Regsiter 198)
Writing relevant number to this register initiates associated setting, calibration or test function
* Means only for Michel Factory use
** Put is setup mode first and then after test put back into measurement mode
2 = Set Cell Pressure 4 mA ADC Value*
3 = Set Cell Pressure 20 mA ADC Value*
4 = Set Ext Pressure 4 mA ADC Value*
5 = Set Ext Pressure 20 mA ADC Value*
6 = Send Test String to Sensor Comms Channel*
7 = Send Test String to Display Comms Channel*
10 = Force Analog Output 1 to 4 mA**
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97450 Issue 1, July 2015
QMA401 User’s Manual
APPENDIX B
11 = Force Analog Output 1 to 20 mA**
12 = Force Analog Output 2 to 4 mA**
13 = Force Analog Output 2 to 20 mA**
14 = Force Analog Output 1 to 12 mA**
15 = Force Analog Output 2 to 12 mA**
20 = Set Alarm Relay1**
21 = Set Alarm Relay2**
22 = Set Alarm Relay3**
23 = Set Alarm Relay4**
25 = Set REF Solenoid* (uses 100% power to solenoid)**
26 = Set SAMPLE Solenoid* (uses 100% power to solenoid)**
27 = Set CAL Solenoid* (uses 100% power to solenoid)**
28 = All Solenoids Off* (uses 100% power to solenoid)**
30 = Set RTC Calibration ppm error value*
35 = Set Defaults Osc Board*
36 = Set Defaults Main Board* (Does not default the main board calibration values).
50 = Set System Mode to Standby (all solenoids off and no phase countdown)*
51 = Set System Mode to Measurement if in Cal mode (i.e. Abort Cal) OR Set to Manual Cal if in Auto
cal countdown mode
52 = Set System Mode to Calibration if manual cal option set OR Start Auto Cal countdown mode if
Auto Cal option set. (Only if oven temperature has become stable).
60 = Start on board SD Logging (Open log file)*
61 = Stop on board SD logging (Close log file)*
65 = Enter Board Setup Mode* (Normal measurement cycle and output/alarm updates are stopped)
66 = Exit Board Setup Mode*(Normal measurement cycle and output/alarm updates are re-started)
67 = Reset Ram Log Buffer and Stats to zeros
68 = Set Ethernet Settings (to values in Registers 245 to 250) – (Command not allowed via modbus)
70 = Reset Dryer Service flag and ppm sum register to 0.0ppm
71 = Reset Moist Generator Service flag and hours used counter to 0hr
74 = Clear Alarm1 Latch
75 = Clear Alarm2 Latch
Michell Instruments
67
QMA401 User’s Manual
APPENDIX B
76 = Clear Alarm3 Latch
77 = Clear Alarm4 (Fault) Latch
Register Configuration U — Internal Logging Configuration/Service Interval Days
15
14
13
12
11
10
9
8
DeltaF and ppmV Log Interval in cycles
(DP)
Range is 1 to 15 cycles. (for CAL use, def = 1)
7
RL
6
RL
5
RL
4
RL
3
DP
2
DP
1
DP
0
DP
Ram Buffer Log parameter (RL)
0000 = Moisture – PPMv (def)
0001= Moisture - PPMw
0010 = Moisture – MGM3
0011 = Moisture – PA (wvp)
0100 = Moisture - LBMMSCF
0101 = Dew point
1111 = No logging
Register Configuration U — Internal Logging Configuration/Service Interval Days
15
DC
14
DC
13
DC
12
DC
11
DC
10
DC
9
DC
8
DC
Dryer Capacity or Used (DC) – in ppm
0 to 255 x 100,000
represents 0 to 25,500,000 in 100,000 steps.
7
ML
6
ML
5
ML
4
ML
3
ML
2
ML
1
ML
0
ML
Moisture Gen Capacity or Used (ML) – in
Days
0 to 255 x 10
Represents 0 to 2,550 days (61200 hours) in 10
day steps
Register Configuration W — Signal Filter Settings
15
14
13
12
11
10
9
BeatF Median Filter (BF) Setting
5 sample Median filter to remove spikes
1=Median of 1 (middle value)
3=Median of 3, averaged (default)
8
7
6
BF
5
BF
4
DF
3
DF
2
DF
1
DF
0
DF
DeltaF Median Filter (DF) Sample size
4-24 = Sample size of filter to smooth signal
(default=12)
< 4 or >24 = OFF
Any other value = OFF
68
97450 Issue 1, July 2015
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APPENDIX B
B.1
Set points and ranges
Set points and ranges for Analog Outputs, Alarms, Fixed User Pressure, Cell Pressure and
External (line) Pressure sensor.
Unit
Default Values
Register Range
Register Type
ppmV
Adjustment
Range/Res.
0.0 to 3000.0
0.0 to 2000.0
0-30000
ppmW
0 to 40000
0 to 40000
0 to 40000
mgm3
0 to 20000
0 to 20000
0 to 20000
Pa
0.0 to 3000.0
0.0 to 3000.0
0 to 30000
dew point degC
-120.0 to +20.0
-100.0 to 0.0
-1200 to 200
dew point degF
-184.0 to +68
-148.0 to 32.0
-1840 to 680
lbmmscf
0 to 60000
0 to 60000
0 to 60000
Oven T degC
-50.0 to +100.0
59.9 to 60.1
-500 to 1000
Oven T degF
-58.0 to +212.0
139.8 to 140.2
-580 to +2120
Flow, ml/m
0.0 to 300.0
90.0 to 110.0
0 to 3000
Pressure, Psi.G
0.0 to 3000.0
0.0 to 3000.0
0 to 30000
Pressure, Psi.A
14.7-3014.7
15.0-3015.0
147 to 30147
Pressure, Bar.G
0.00 to 204.08
0.00 to 204.00
0 to 20408
Pressure, Bar.A
1.00 to 205.08
1.00 to 205.00
1 to 20508
Pressure, Mpa
0.01 to 20.78
0.01 to 21.00
1 to 2078
Pressure, mmHg
750 to 65535
(limited)
750 to 65000
0 to 65535
(limited)
A2 (unsigned
short/10)
A1 (unsigned
short)
A1 (unsigned
short)
A2 (unsigned
short/10)
B2 (signed
short/10)
B2 (signed
short/10)
A1 (unsigned
short)
B2 (signed
short/10)
B2(signed
short/10)
A2(unsigned
short/10)
A2 (unsigned
short/10)
A2 (unsigned
short/10)
A3 (unsigned
short/100)
A3 (unsigned
short/100)
A3 (unsigned
short/100)
A1 (unsigned
short)
Notes:
ppmW
Based on 0-2000 ppm and mol weight of gas variation of 1 to 200, and mol weight of water of 18.
At
At
At
At
0 ppmv = 0*(18/200) = 0ppmW
2000 ppmv = 2000*(18/200 = 180ppmW
0 ppmv = 0*(18/1) = 1ppmW
2000 ppmv = 2000*(18/1) = 36000ppmW
Michell Instruments
69
QMA401 User’s Manual
APPENDIX B
Dew Point
This is based on data available in ISO or IGT table which ranges between -88 to +20.
Water Vapor Pressure (Pa)
Using HumiCal, at -100°Cdp Wvp is 0.001pa and at +20 wvp is 2332.636pa.
Lbmmscf
This is ppmv *21.4 = so 2000*21.4 = 42800.
mgm3
Using calc at http://www.skcinc.com/converter/converter.asp.
1ppm with mol weight of 1 = 0.05mgm3
1ppm with mol weight of 200 = 8.2mgm3
2000ppm with mole weight of 1 = 81.8 mgm3
2000ppm with mol weight of 200 = 16359.9mgm3
Pressure
All pressure values based on 0-3000psig except mmHg which is limited by 16bit register size.
http://www.engineeringtoolbox.com/pressure-units-converter-d_569.html
B.2
Gases for Gas Correction Values
Gases for gas correction values, indexed 0 to 23. If a USER gas is selected then the instrument will
use the gas correction values that are set in the respective registers 38, 39 and 40 for the Flow
correction and at registers 41, 42 and 43 for the molecular weights.
0 = Air - Mixture
1 = Ar - Argon
2 = CH4 - Methane
3 = C2H2 - Ethyne
4 = C2H4 - Ethelyne
5 = C2H6 - Ethane
6 = C3H6 - Propylene
7 = C3H8 - Propane
8 = C4H10 - Butane
9 = CO - Carbon Monoxide
10 = CO2 - Carbon Dioxide
11= H2 - Hydrogen
70
12
13
14
15
16
17
18
19
20
21
22
23
=
=
=
=
=
=
=
=
=
=
=
=
He - Helium
Kr - Krypton
N2 - Nitrogen
Ne - Neon
NH3 - Ammonia
NO - Nitrogen Oxide
N2O - Nitrous Oxide
O2 - Oxygen
XE - Xenon
UserGas1
UserGas2
UserGas3
97450 Issue 1, July 2015
QMA401 User’s Manual
APPENDIX C
Appendix C
EU Declaration of Conformity
Michell Instruments
71
QMA401 User’s Manual
APPENDIX C
Appendix C
72
EU Declaration of Conformity
97450 Issue 1, July 2015
QMA401 User’s Manual
APPENDIX D
Appendix D
Quality, Recycling
& Warranty
Information
Michell Instruments
73
QMA401 User’s Manual
APPENDIX D
Appendix D
D.1
Quality, Recycling & Warranty Information
Pressure Equipment Directive (PED) 97/23/EC
The above Directive has been implemented in United Kingdom Law by the Pressure Equipment
Regulations 1999.
The Regulations require that all pressure equipment and assemblies within the scope of the Pressure
Equipment Directive must be safe when placed on the market or put into service.
Michell Instruments' products have been assessed and, as referenced against the Classification
Charts detailed in Annex II of the Directive, do not fall in to the requirements for CE Marking
compliance with the Pressure Equipment Directive.
Article 3, paragraph 3 states that any product containing a pressurised fluid that does not qualify for
compliance should, nevertheless, be constructed with Sound Engineering Practice (SEP).
Michell Instruments attests here that its products have been designed, manufactured & tested to
assure safe operation, and in accordance with Sound Engineering Practices.
D.2
Recycling Policy
Michell Instruments is concerned with the protection of the environment. It is our commitment to
reduce and eliminate from our operations, wherever possible, the use of substances which may be
harmful to the environment. Similarly, we are increasingly using recyclable and/or recycled material
in our business and products wherever it is practical to do so.
To protect natural resources and to promote material reuse, please separate batteries from other
types of waste and recycle responsibly. If batteries are not properly disposed of, these substances
can cause harm to human health and the environment.
The product that you have purchased may contain recyclable and/or recycled parts and we will be
happy to provide you with information on these components if required. For further information
please see the following sections.
D.3
WEEE Compliance
Directive 2012/19/EU 4 July 2012 on Waste Electronic and Electrical Equipment (WEEE)
The Waste Electronic and Electrical Equipment (WEEE) Directive places rules upon European
manufacturers of electrical and electronic equipment. The directives’ aim is to reduce the impact
that electronic devices have on the environment.
Michell Instruments is in full compliance with the WEEE Directive and is registered with an approved
recycler (Registration No. WEE/JB0235YW) and treats the requirement of the directive and the
protection of the environment with the utmost importance. All Michell Instruments' products are
appropriately marked indicating their requirement for recycling.
It may be required to return certain instruments for treatment at the end of their working life.
Feb 2013
74
97450 Issue 1, July 2015
QMA401 User’s Manual
D.4
APPENDIX D
RoHS2 Compliance
Directive 2011/65/EU of the European Parliament and of the Council of 8 June 2011
The Restriction of Hazardous Substances (RoHS) Directive places rules upon European manufacturers
of electrical and electronic equipment. The directives’ aim is to reduce the impact that electronic
devices have on the environment.
According to the EC Directive 2002/95/EC Michell Instruments' products qualify as Category 9, Control
and Monitoring Equipment. Under the 2002/95/EC Directive, Category 9 products are exempt from
compliance with the Directive.
However, the careful design of all Michell Instruments' products takes into consideration the
requirements of the Directive and, wherever possible, compliance is achieved. All future products
will be developed entirely using compliant materials. Furthermore, Michell Instruments is taking
active steps to remove non-compliant materials and components from existing products wherever
these may occur. Presently, none of the non-compliant materials are known to occur in Michell
Instruments' products.
The new Directive 2011/65/EU (RoHS2) entered into force on 21 July 2011 and required all Member
States to transpose the provisions into their respective national laws by 2 January 2013.
Under the provisions of the RoHS2 EU Directive 2011/65/EU (Article 3, [24]) defines "Control and
Monitoring Equipment" specifically as "monitoring and control instruments designed exclusively for
industrial or professional use".
RoHS2 EU Directive 2011/65/EU states the closing date for compliance of any Control and Monitoring
Equipment product sold into the EU market place as 22nd July 2017.
However, the careful design policy of all Michell Instruments' products continues to attain compliance
in the shortest practical timescales and strives to ensure that less than 0.1% of total mass per
product, of all non-compliant materials, appear within them. Michell Instruments continues to
monitor suppliers and material sources to ensure that compliance of goods provided is maintained.
January 2013
D.5
Warranty
Unless otherwise agreed, the Supplier warrants that, as from the date of delivery for a period of 12
months, the goods and all their component parts, where applicable, are free from any defects in
design, workmanship, construction or materials.
The Supplier warrants that the services undertaken shall be performed using reasonable skill and
care, and be of a quality conforming to generally accepted industry standards and practices.
Except as expressly stated, all warranties whether express or implied, by operation of law or
otherwise, are hereby excluded in relation to the goods and services to be provided by the Supplier.
All warranty services are provided on a return to base basis. Any transportation costs for the return
of a warranty claim shall reside with the Customer.
Michell Instruments
75
QMA401 User’s Manual
APPENDIX D
D.6
REACH Compliance
Regulation (EC) No. 1907/2006
Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH)
Michell Instruments is a manufacturer of moisture measurement and gas analysis instrumentation
and is a ‘downstream’ user of chemicals, as described by the EU Council Directive 76/769/EEC. The
products we supply are not raw chemical products (goods).
Under normal and reasonably foreseeable circumstances of application, the goods supplied to you
shall not contain or release any prohibited chemicals. No listed SVHC (Substances of Very High
Concern) appear within products manufactured by Michell Instruments. Therefore the 0.1% mass
per product, or total usage of 1 tonne/year, will never be exceeded. For these reasons we are neither
required by obligation for registration nor for the creation of material safety data sheets (MSDS) for
our products.
Our continued review of the SVHC Candidate List and latest additions is to ensure we remain
compliant.
Michell Instruments maintains a hazardous material register in which MSDS data sheets are collated,
and we will check that our suppliers will comply to REACH requirements for all materials and
substances we use in the processes of our manufacturing.
In the unlikely event that any chemicals of concern appear in our products in quantities greater than
0.1% of total mass per product we will immediately inform you by correspondence according to the
REACH Article 33 requirements. Our current appraisal is, however, that we do not expect or foresee
such an incidence.
January 2013
D.7
Return Policy
If a Michell Instruments’ product malfunctions within the warranty period, the following procedure
must be completed:
76
1.
Notify a Michell Instruments’ distributor, giving full details of the problem, the
model variant and the serial number of the product.
2.
If the nature of the problem indicates the need for factory service then the
instrument should be returned to Michell Instruments, carriage prepaid, preferably
in the original packaging, with a full description of the fault and the customer
contact information.
3.
Upon receipt, Michell Instruments will evaluate the product to determine the cause
of the malfunction. Then, one of the following courses of action will be taken:
•
If the fault is covered under the terms of the warranty, the
instrument will be repaired at no cost to the owner and returned.
•
If Michell Instruments determines that the fault is not covered
under the terms of the warranty, or if the warranty has expired,
an estimate for the cost of the repairs, at standard rates, will be
provided. Upon receipt of the owner’s approval to proceed, the
product will be repaired and returned.
97450 Issue 1, July 2015
QMA401 User’s Manual
D.8
APPENDIX D
Calibration Facilities
Michell Instruments’ calibration facilities are among the most sophisticated in the world and have
been recognized for their excellence.
Traceability to the National Physical Laboratory (NPL) UK is achieved through our UKAS Accreditation
(Number 0179). This covers dew point over the range -90 to +90°C (-130 to +194°F) and also
Relative Humidity.
Dew-point calibrations are also traceable to the National Institute for Standards & Technology (NIST)
USA over the range -75 to +20°C (-103 to +68°F).
NOTE: Standard traceable calibration certificates for instruments and sensors are not
issued under our UKAS accreditation.
D.9
Manufacturing Quality
Michell Instruments is registered with the British Standards Institute for Quality Assurance to:
BS EN ISO 9001: 2008
Rigorous procedures are performed at every stage of production to ensure that the materials of
construction, manufacturing, calibration and final test procedures meet the requirements laid down
by our BSI approved Quality System.
Please contact Michell Instruments (www.michell.com) if the product does not arrive in perfect
working order.
D.10
FCC (EMC Requirements for North America)
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions:
1.
This device may not cause harmful interference.
2.
This device must accept any interference, including interference that may cause
undesired operation.
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used
in accordance with the user manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at his own expense. This product must be
operated as per the operating instructions provided. Do not make any alterations or modifications
to the product. Any unauthorized alterations or modifications made to this product may require you
to stop operating the product.
Canadian Radio Interference Regulations.
This Class A digital product complies with Canadian ICES-001. Règlement canadien sur les
interférences radio. Ce produit numérique de classe A est conforme à la norme NMB-001.
Michell Instruments
77
APPENDIX E
QMA401 User’s Manual
Appendix E
Return Document &
Decontamination Declaration
78
97450 Issue 1, July 2015
QMA401 User’s Manual
Appendix E
APPENDIX E
Return Document & Decontamination Declaration
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IMPORTANT NOTE: Please complete this form prior to this instrument, or any components, leaving your
site and being returned to us, or, where applicable, prior to any work being carried out by a Michell
engineer at your site.
Instrument
Warranty Repair?
Serial Number
YES
NO
Company Name
Original PO #
Contact Name
Address
Telephone #
E-mail address
Reason for Return /Description of Fault:
Has this equipment been exposed (internally or externally) to any of the following?
Please circle (YES/NO) as applicable and provide details below
Biohazards
YES
NO
Biological agents
YES
NO
Hazardous chemicals
YES
NO
Radioactive substances
YES
NO
Other hazards
YES
NO
Please provide details of any hazardous materials used with this equipment as indicated above (use continuation sheet
if necessary)
Your method of cleaning/decontamination
Has the equipment been cleaned and decontaminated?
YES
NOT NECESSARY
Michell Instruments will not accept instruments that have been exposed to toxins, radio-activity or bio-hazardous
PDWHULDOV)RUPRVWDSSOLFDWLRQVLQYROYLQJVROYHQWVDFLGLFEDVLFÀDPPDEOHRUWR[LFJDVHVDVLPSOHSXUJHZLWKGU\
JDVGHZSRLQWƒ&RYHUKRXUVVKRXOGEHVXI¿FLHQWWRGHFRQWDPLQDWHWKHXQLWSULRUWRUHWXUQ
Work will not be carried out on any unit that does not have a completed decontamination declaration.
Decontamination Declaration
I declare that the information above is true and complete to the best of my knowledge, and it is safe for Michell
personnel to service or repair the returned instrument.
Name (Print)
Position
Signature
Date
F0121, Issue 2, December 2011
Michell Instruments
79
http://www.michell.com
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