Servomex SERVOPRO MultiExact User manual

Par Number: 05410001A
Revision: 6
Language: UK English
Opera or Manual
SERVOPRO MultiExact
Gas Analyser
PROCESSANAL
YSERS

This page in en ionally blank

MultiExact Gas Analyser Contents
CONTENTS
Section
Page
1DESCRIPTION AND DEFINITIONS............................................................... 1
1.1 Scope of this manual...................................................................................... 1
1.2 Safety information........................................................................................... 1
1.3 Description...................................................................................................... 2
1.4 Ordering options ............................................................................................. 2
2SPECIFICATION............................................................................................ 5
2.1 General........................................................................................................... 5
2.2 Environmental limits........................................................................................ 5
2.3 Electrical data ................................................................................................. 6
2.4 Sample gas..................................................................................................... 7
2.5 Calibration gas................................................................................................ 8
3UNPACK THE ANALYSER .......................................................................... 11
4ANALYSER USER INTERFACE.................................................................. 12
4.1Introduction................................................................................................... 12
4.2 Start-up and measurement screens............................................................. 12
4.3 Soft key legends........................................................................................... 14
4.4 System and measurement status icons........................................................ 15
4.5 Scroll bars..................................................................................................... 16
4.6 Menu options/screens and password protection..........................................16
4.7 The menu screen.......................................................................................... 18
4.8 The settings screen ...................................................................................... 19
4.9 The information screen................................................................................. 19
4.10 Editing on-screen data.................................................................................. 20
5INSTALLATION AND SET-UP ..................................................................... 21
5.1 Mechanical installation.................................................................................. 21
5.1.1 Bench mounting....................................................................................... 21
5.1.2 Panel mounting........................................................................................ 21
5.1.3 Rack with slide mounting......................................................................... 23
5.1.4 Valve block connections (option).............................................................26
5.2 Electrical Installation..................................................................................... 27
5.2.1 Electrical Safety....................................................................................... 27
5.2.2 Analogue output connections.................................................................. 28
5.2.3 Fault and range relay connections ..........................................................29
5.2.4 Alarm and status relay connections (option)...........................................30
5.2.5 Auto validate/calibrate connections (option)............................................ 31
5.2.6 Modbus RS485 and ethernet connections (option).................................33
5.2.7 Connect the electrical supply................................................................... 34
5.3 Connect the sample/calibration gas pipeline(s)............................................35
5.4 Switch on/set-up........................................................................................... 36
5.4.1 Selecting the security level and password(s)..........................................36
5.4.2 Selecting the security level...................................................................... 37
5.4.3 Changing passwords............................................................................... 38
5.4.4Adjusting the contrast.............................................................................. 38
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Contents MultiExact Gas Analyser
5.4.5 Adjusting the backlight timer.................................................................... 39
5.4.6 Setting the clock ...................................................................................... 39
5.4.7 Changing regional settings...................................................................... 40
5.4.8 Selecting communications type............................................................... 40
5.5 Setting up automatic validation/calibration (option)...................................... 41
5.5.1 Overview of automatic validation/calibration...........................................41
5.5.2 Automatic validation/calibration sequence ..............................................42
5.5.3 Remote calibration or automatic validation/calibration............................45
5.5.4 Automatic validation/calibration target and tolerance..............................46
5.5.5 Automatic validation/calibration type and mode...................................... 47
5.5.6 Automatic validation/calibration phases .................................................. 47
5.5.7 Automatic validation/calibration timers.................................................... 49
5.6 Calibration linking ......................................................................................... 50
5.7 Configuring and using the mA outputs (option)............................................ 51
5.7.1 Overview.................................................................................................. 51
5.7.2 Introduction to the mA output parameters............................................... 51
5.7.3 Setting up the mA output parameters......................................................53
5.7.4 Calibrating the mA output........................................................................ 56
5.8 Configuring and using the voltage outputs (option)...................................... 57
5.8.1 Overview.................................................................................................. 57
5.9 Correcting O2measurements for background gases (purity or control only)57
5.9.1 Overview of measurement errors............................................................ 57
5.9.2 Entering a cross-interference (X-Interference) compensation ................ 58
5.10 Selecting display units.................................................................................. 58
5.11 Configuring the measurement alarms .......................................................... 60
5.11.1 Alarm modes and levels .......................................................................... 60
5.11.2 Latching/non-latching alarms................................................................... 62
5.11.3 Hysteresis levels...................................................................................... 62
5.11.4 Viewing the measurement alarm status.................................................. 63
5.12 Setting up the flow alarm (option)................................................................. 64
6CALIBRATION.............................................................................................. 66
6.1 Manual calibration......................................................................................... 66
6.2 Automatic validation/calibration.................................................................... 68
6.2.1 Initiating an automatic validation/calibration............................................ 68
6.2.2 Automatic validation/calibration status indications..................................69
6.2.3 Stopping an automatic validation/calibration........................................... 70
6.2.4 Viewing validation/calibration history.......................................................71
6.3 Calibrating the pressure transducer (O2purity only) .................................... 72
6.4 Calibrating the flow alarm (option)................................................................ 73
7GENERAL OPERATION .............................................................................. 74
7.1 Checking the relay signal outputs.................................................................74
7.2 Pressure Compensation (O2purity and control only)...................................75
7.2.1 Introduction.............................................................................................. 75
7.2.2 Switching pressure compensation on/off.................................................75
7.2.3 Viewing pressure effected measurements (option).................................76
7.3 Viewing flow levels (option) .......................................................................... 76
7.4 Checking the mA output (option).................................................................. 77
7.5 Checking the voltage output (option)............................................................ 77
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MultiExact Gas Analyser Contents
7.6 Switching off the analyser............................................................................. 77
8ROUTINE MAINTENANCE .......................................................................... 78
8.1 Cleaning the analyser................................................................................... 78
8.2 Inspecting/replacing the fuse (when necessary) .......................................... 78
8.3 Inspecting the optional filter element (O2purity / control only)..................... 80
8.4 Inspecting the filter element (CO / CO2/ N2O / CH4 trace only) ...................81
8.5 CO2scrubber................................................................................................ 82
8.5.1 For 0-10ppm CO2.................................................................................... 82
8.5.2 For 0-500ppm CO2.................................................................................. 82
8.6 Use of the analyser with toxic gases............................................................ 82
8.7 Preventative maintenance............................................................................ 83
9FAULT FINDING........................................................................................... 84
9.1 Fault, maintenance required and SIP statuses ............................................ 84
9.1.1 Status definitions ..................................................................................... 84
9.1.2 Status annunciations ............................................................................... 84
9.2 Viewing messages........................................................................................ 90
9.2.1 Active messages ..................................................................................... 90
9.2.2 View history messages............................................................................ 90
9.3 Diagnostics ................................................................................................... 91
9.4 General fault finding...................................................................................... 92
10 STORAGE AND DISPOSAL......................................................................... 95
10.1 Storage ......................................................................................................... 95
10.2 Disposal........................................................................................................ 95
11 SPARES ....................................................................................................... 96
A1 RS232 CONNECTION DETAILS ................................................................. 97
A1.1 Overview....................................................................................................... 97
A1.2 Connecting the analyser to a PC.................................................................. 98
A1.3 Configuring the RS232 serial output parameters ......................................... 98
A1.4 Capturing data using Windows®and Hyper Terminal™...............................99
A1.5 Configuration transfer................................................................................. 100
A2 SERIAL OUTPUT FORMATS..................................................................... 103
A3 IMPLEMENTATION GUIDE FOR MODBUS COMMUNICATIONS (OPTION)104
A3.1 Introduction................................................................................................. 104
A3.2 References ................................................................................................. 104
A3.3 Modbus Setup............................................................................................. 104
A3.4 Supported function codes........................................................................... 105
A3.5 Exception codes ......................................................................................... 105
A3.6 Addressing.................................................................................................. 105
A3.7 Floating point numbers............................................................................... 106
A3.8 System data mapping................................................................................. 106
A3.9 Transducer data mapping........................................................................... 106
A3.10 System Fault Mapping................................................................................ 108
A3.11 Transducer fault and alarm mapping.......................................................... 109
A3.12 System set-up mapping.............................................................................. 112
A3.13 Transducer set-up mapping........................................................................ 112
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Contents MultiExact Gas Analyser
A3.14 System control............................................................................................ 115
A3.15 Transducer control...................................................................................... 115
A4 CONFIGURING THE MODBUS PARAMETERS (OPTION)...................... 117
A4.1 RS485......................................................................................................... 117
A4.2 TCP (Ethernet)............................................................................................ 119
A5 DISPLAY UNIT CONVERSION FACTORS................................................ 120
A6 SAMPLE WETTED MATERIALS ............................................................... 121
A7 DISPOSAL IN ACCORDANCE WITH THE WASTE ELECTRICAL AND
ELECTRONIC EQUIPMENT (WEEE) DIRECTIVE....................................123
A8 COMPLIANCE AND STANDARDS INFORMATION.................................. 124
A9 PERFORMANCE DATA............................................................................. 125
A9.1 O2purity measurement............................................................................... 125
A9.2 Performance data: O2control measurement.............................................. 126
A9.3 Performance data: O2trace measurement.................................................127
A9.4 Performance data: 0-10ppm CO2measurement........................................ 128
A9.5 Performance data: 0-500ppm CO2measurement...................................... 129
A9.6 Performance data: 0-10ppm CO measurement .........................................131
A9.7 Performance data: 0-20ppm N2O measurement........................................132
A9.8 Performance data: 0-50ppm CH4measurement........................................133
A9.9 Performance data: TCD.............................................................................. 134
A9.10 Performance data: flow alarm..................................................................... 135
A10 RECOMMENDED CALIBRATION PERIODS ............................................ 136
A11 CROSS INTERFERENCE OFFSETS (FOR PARAMAGNETIC TRANSDUCERS)
.................................................................................................................... 137
®
Windows and Excel are registered trademarks of Microsoft Corporation.
™
HyperTerminal is a trademark of Hilgraeve Inc.
©
This manual is copyright, and no part of it may be reproduced without Servomex's written
approval.
iv 05410001A / Revision 6

MultiExact Gas Analyser 1 – Description and definitions
1 DESCRIPTION AND DEFINITIONS
1.1 Scope of this manual
This manual provides installation, operation and routine maintenance instructions for
the SERVOPRO MultiExact Gas Purity Analyser, abbreviated to "analyser" in the
remainder of this manual.
1.2 Safety information
Read this manual and ensure that you fully understand its content before you attempt
to install, use or maintain the analyser. Important safety information is highlighted in
this manual as WARNINGs and CAUTIONs, which are used as follows:
WARNING
Warnings highlight specific hazards which, if not taken into account,
may result in personal injury or death.
CAUTION
Cautions highlight hazards which, if not taken into account, can result in
damage to the analyser or to other equipment or property.
This manual also incorporates 'Be aware of' information, which is used as follows:
☞
This highlights information which it is useful for you to be aware of (for
example, specific operating conditions, and so on).
05410001A / Revision 6 1

1 – Description and definitions MultiExact Gas Analyser
1.3 Description
The analyser is designed to meet the needs of the control and product quality
applications of industrial gas producers and users, who require fast, accurate and
reliable gas analysis.
The analyser can support up to two gas measurements, using paramagnetic, zirconia
infrared and thermal conductivity transducers to determine the content of gas
samples.
Gas sample measurements are shown on the analyser display, and can also be
output to a serial device connected to the analyser, or as milliAmp (mA) / voltage
outputs, or over a selection of digital communications (Modbus RS485 or TCP and
Profibus).
The analyser conforms to the requirements of the NAMUR
(Normenarbeitsgemeinschaft für Mess Und Regeltechnik in der Chemischen
Industrie) standards NE43 (4 – 20 mA output) and NA64 (status outputs).
The analyser is simple to operate, with an intuitive user interface. The analyser is 3U
in height and is suitable for 19 inch rack, panel or bench mounting.
The analyser requires little routine maintenance, other than calibration which is
essential for the accuracy of sample gas measurements (see Section 6) and
replacement of filter / scrubber elements (if fitted: see Sections 8.3, 8.4 and 8.5).
1.4 Ordering options
For the latest ordering options please contact your local Servomex agent or visit
www.servomex.com.
2 05410001A / Revision 6

MultiExact Gas Analyser 1 – Description and definitions
A.
B.
Analyser with external filters
Analyser with flowmeters
Key
Description
Key
Description
1. Display
2. Sample 2 gas label
3. Sample 1 gas label
4. Sample 2 external filter *
5. Sample 1 external filter *
6. Soft key 4
7. Soft key 3
8. Fault LED
9. Soft key 2
10. Alarm LED
11. Soft key 1
12. Sample 2 bypass flowmeter †
13. Sample 2 flowmeter
14. Sample 1 bypass flowmeter †
15. Sample 1 flowmeter
* TCD, O2purity and O2control transducers only.
†Pressure-driven transducers only.
Figure 1 – Front of the analyser
A
SERVOMEX
SERVO
PRO
MultiExact Serial No. 05410/P0001
SERVOMEX
FILTERFILTER
Bypass Sample
SERVO
PRO
MultiExact Serial No. 05410/P0001
SERVOMEX
1 2 3 4 5
1011 9 8 7 6
1 2 3 12 13 14 15
1011 9 8 76
B
DA/1142/C
Bypass Sample
05410001A / Revision 6 3

1 – Description and definitions MultiExact Gas Analyser
Key
Description
Key
Description
1. Regional compliance symbols **
2. Transducer 1 sample gas inlet
3. WEEE compliance symbol
4. Transducer 2 sample gas inlet *#
5. Transducer 2 sample gas inlet †#
6. AC supply voltage symbol
7. Functional earth (ground) terminal
8. Electrical supply plug and on/off
switch
9. Ethernet or profibus connector
(option)
10. Earth (ground) terminals for cable
screening
11. Transducer 2 mA output/voltage
output connector #
12. Transducer 2 status relay connector
(option) #
13. Transducer 2 auto val/cal connector
(option) #
14. Transducer 1 mA output/voltage
output connector
15. Transducer 1 status relay connector
(option)
16. Transducer 1 auto val/cal connector
(option)
17. RS485 connector (option)
18. "Caution – refer to manual" symbol
19. RS232 connector
20. "Earth (ground)" symbol
21. Transducer 2 sample gas outlet †#
22. Transducer 2 sample gas outlet *#
23. Transducer 1 sample gas outlet
*
CO, CO2, N2O, and CH4trace transducers and valve block.
†
TCD, O2trace, O2purity and control transducers.
#
Analysers configured for 2 measurements only.
**
This product has been tested to the requirements of CAN/CSA–C22.2 No. 61010–1, second
edition, including Amendment 1 or a later version of the same standard incorporating the same
level of testing requirements.
☞
Optional external filters (not shown) may be fitted to the sample gas inlet (1, 2) on an
analyser with a CO, CO2, N2O, or CH4 trace transducer. Refer to Section 8.4
for
details of these external filters. Trace O2
transducers have internal oil and particle
filters which are not replaceable.
Figure 2 – Rear of the analyser
4 05410001A / Revision 6

MultiExact Gas Analyser 2 – Specification
2 SPECIFICATION
WARNING
The protection, accuracy, operation and condition of the equipment
may be impaired if the analyser is not installed in accordance with the
requirements of this and subsequent sections of the manual.
2.1 General
Dimensions:
length x height x width
* Add 100 mm to length (L) if valve block is fitted
to allow for the connector and cable.
Rack mountable analyser
(L x H x W)
478 x 133 x 435 mm (18.8 x 5.2 x 17 in.) *
478 x 133 x 483 mm (18.8 x 5.2 x 19 in.)
†
Bench mounted analyser
(L x H x W)
478 x 146 x 435 mm (18.8 x 5.7 x 17 in.) #
478 x 180 x 435 mm (18.8 x 7 x 17 in.)
‡
Mass
< 12 kg
Electrical supply requirements
See Section 2.3
*
Without 19-inch rack mounting brackets.
†
With 19-inch rack mounting brackets fitted.
#
With front mounting feet retracted.
‡With front mounting feet extended.
2.2 Environmental limits
Equipment is suitable for indoor use only
Ambient temperature range
Operation
5 to 45 °C
Storage
–20 to 60 °C
Operating ambient pressure range
101.3 kPa ± 10% (1.013 bar ± 10%)
Operating ambient humidity range
10 to 90% RH, non-condensing
Operating altitude range
–500 * to 2000 †metres
Ingress protection
IP20
*
Below sea level.
†Above sea level.
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2 – Specification MultiExact Gas Analyser
2.3 Electrical data
Electrical supply
Voltage
100 to 240 Vac, 50 to 60 Hz
(± 10% maximum fluctuation)
Fuse rating / type
T 3.15 AH / 250 V size: 20 x 5 mm
Maximum power consumption
100 VA
Interface signal relay ratings *
30 V (dc or ac) / 1 A
mA output (active)
Maximum load resistance
1 K Ohms
Isolation voltage (to earth)
500 V (dc or ac)
Output range
Normal sample measurement
0 to 20 mA or 4 to 20 mA †
Fault condition
0 mA or 21.5 mA †
Under range #
0 – 4 mA
Voltage output (active)
Maximum load resistance
100 K Ohms
Isolation voltage (to earth)
500 V (ac or dc)
Output range
Normal sample measurement
0 to 10 V
Fault condition
0 or 10.75 V
Under range #
Not applicable
Signal / voltage / mA / RS485 output terminals suitable for
Flexible conductors
0.5 to 1.5 mm² (20 to 16 AWG)
Solid conductors
0.5 to 1.0 mm² (20 to 18 AWG)
* The relay output signals are volt-free signals.
†
User selectable: see Sections 5.7.2 and 5.7.3.
#Only available when the 4 to 20 mA output range is selected: see Sections 5.7.2 and 5.7.3.
6 05410001A / Revision 6

MultiExact Gas Analyser 2 – Specification
2.4 Sample gas
☞
The sample gases must be non flammable, clean, non-
corrosive, free from oil
and condensates and compatible with the materials listed in Appendix A6.
Paramagnetic transducer (% O2)
Flow rate *
100 to 250 ml min-1
Dew point
5 °C below ambient temperature (minimum)
Temperature
5 to 45 °C
Particulate size
< 2 µm (2 micron)
Zirconia transducer (trace O2)
Flow rate *
200 to 400 ml min-1
Dew point
5 °C below ambient temperature (minimum)
Temperature
5 to 45 °C
Particulate size
< 2 µm (2 micron)
Infrared (GFX) transducer (trace)
Flow rate *
200 to 500 ml min-1
Dew point
5 °C below ambient temperature (minimum)
Temperature
5 to 45 °C
Particulate size
< 2 µm (2 micron)
Thermal Conductivity transducer (%)
Flow rate *
100 to 200 ml min-1
Dew point
5 °C below ambient temperature (minimum)
Temperature
5 to 45 °C
Particulate size
< 2 µm (2 micron)
*
The flow rates apply to flow-driven transducers only. On pressure-driven transducers, the
sample gas pressure must be in the range 14 to 56 kPa (2 to 8 psig).
05410001A / Revision 6 7

2 – Specification MultiExact Gas Analyser
2.5 Calibration gas
☞
The calibration gases must be clean, non-
corrosive, free from oil and
condensates and compatible with the materials listed in Appendix A6.
☞
For optimum calibration results, the calibration
gas flow rate/pressure should
be the same as the flow rate/pressure of the gases to be sampled.
O2purity transducer calibration gases
High calibration setpoint
0.5 – 100% O
2
(100% O2N4[99.99] recommended)
Low calibration setpoint
0 – 99.5% O
2
(0% zero grade nitrogen recommended)
Minimum difference
0.5%
Low calibration tolerance level *
Calibration gas <
5% O2
Calibration gas ≥5% O2
±
0.5% O2
± 10% O2
High calibration tolerance level *
Calibration gas <
5% O2
Calibration gas ≥5% O2
±
0.5% O2
± 10% O2
O2control transducer calibration gases
High calibration setpoint
0.5 – 100% O2
Low calibration setpoint
0 – 99.5% O
2
(0% zero grade nitrogen recommended)
Minimum difference
0.5%
Low calibration tolerance level *
Calibration gas <
5% O2
Calibration gas
≥
5% O2
±
0.5% O2
± 10% O2
High calibration tolerance level *
Calibration gas <
5% O2
Calibration gas ≥5% O2
±
0.5% O2
± 10% O2
8 05410001A / Revision 6

MultiExact Gas Analyser 2 – Specification
TCD transducer calibration gases
High Calibration setpoint
90 – 110% of range**
Low Calibration setpoint
-10 – 10% of range**
Minimum Calibration difference
between low and span
85% of range**
Low Calibration tolerance level *
± 10%
High Calibration tolerance level *
± 10%
* Range and background gas as per analyser specification.
N2O, CO, CO2and CH4 trace transducer calibration gases
High calibration setpoint
40 to 120% of full scale (80 to 110% pref)
Low calibration setpoint
0% (zero grade nitrogen recommended)
Minimum calibration difference
between low and span
8% of full scale
Low calibration tolerance level *
± 10% of full scale
High calibration tolerance level *
± 20% of full scale
O2trace transducer calibration gases
High calibration setpoint
18 to 25% O2
Low calibration setpoint #
0.01 ppm to 5000 ppm O2
Minimum calibration difference
between low and span
17.5% O
2
Low calibration tolerance level *
± 10% O2
High calibration tolerance level *
± 10% O2
#
The low calibration gas must be a high quality certified mixture (usually nitrogen N6.0)
containing trace Oxygen. Mixtures between 1000 ppm to 4000 ppm are preferred.
*
If, during a calibration or validation routine, the measurement is outside the specified range,
a status message is displayed to indicate that there may be a problem (for example, the
wrong calibration gas has been introduced, or the transducer has drifted excessively). The
status can be over-ridden but the history will still remain.
**
Range and background gas as per analyser specification. For optimal performance use
either low or high calibration point to be a single component gas.
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2 – Specification MultiExact Gas Analyser
CAUTION
It is recommended that sample/calibration gas flow is monitored or the flow
alarm option is purchased from Servomex to ensure a representative sample
is being measured for control systems.
CAUTION
The sample and bypass flowmeters are calibrated for use with air as the
background gas. When fitted for the analysis of CH4
in Helium the flowmeter
reading should be multiplied by a factor of 2.7 to provide the correct flow
rate.
10 05410001A / Revision 6

MultiExact Gas Analyser 3 – Unpack the analyser
3 UNPACK THE ANALYSER
WARNING
The analyser is heavy (see Section 2.1). Care must be taken when
handling. it is recommended that they are lifted with hands positioned
on either side on the base of the chassis.
1. Remove the analyser and any other equipment from its packaging.
2. Remove any protective plastic covers from the sample gas inlets and outlets on
the rear of the analyser (see Figure 2).
☞
It is advisable that the protective covers are kept on just prior to fitting.
3. Inspect the analyser and the other items supplied, and check that they are not
damaged. If any item is damaged, immediately contact Servomex or your local
Servomex agent.
4. Check that you have received all of the items that you ordered. If any item is
missing, immediately contact Servomex or your local Servomex agent.
5. If you do not intend to use the analyser immediately:
•Refit any protective plastic covers.
•Place the analyser and any other equipment supplied back in its protective
packaging.
•Store the analyser as described in Section 10.1.
Otherwise, read Section 4 (Analyser user interface), then continue at Section 5
onwards to install, set up, and use the analyser.
☞
Retain the shipping documentation and packaging for future use (for example,
return of the analyser to Servomex for servicing or repair).
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4 – Analyser user interface MultiExact Gas Analyser
4 ANALYSER USER INTERFACE
☞
Throughout this manual, reference is made to product ordering options (such
as "auto
validate") which must be specified at the time of purchase.
Associated menus and menu options will not be available
if your analyser
does not have the corresponding product options.
4.1 Introduction
The analyser user interface comprises the following (shown on Figure 1):
Display
Shows various screens: see Section 4.2 onwards
Soft keys
The function of each of the soft keys depends on the screen
currently being shown on the display:
see Section 4.2
Alarm LED
On when an alarm condition exists: see Section 5.11
Fault LED
On when a fault condition exists: see Section 9
4.2 Start-up and measurement screens
When you first switch on the analyser, a 'start-up screen' is displayed while the
analyser carries out a self-test.
The start-up screen shows the Servomex name, a 'self-test time elapsed/remaining'
indicator, and messages identifying the tasks being carried out as part of the self-test.
The screen will initially display the "System Check" task message. The measurement
screen is then displayed, as shown in Figure 3 below. Note that:
•If your analyser is configured for a single sample gas measurement, the
1-measurement screen will be shown, as in detail A.
•If your analyser is configured for two sample gas measurements, the
2-measurement screen will be shown, as in detail B.
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MultiExact Gas Analyser 4 – Analyser user interface
(A) 1 measurement screen:
(B) 2 measurement screen:
* Only shown when unit is installed with O2purity measurement and pressure compensation is
on: see Section 7.2.
#Only shown when unit is installed with flow alarm option.
Figure 3 – The measurement screen
Gas being measured
Measurement units
Pressure compensation
indicator
*
Current measurement
Alarm icon
(see
Section 5.11.1)
mA Range
(see
Section 5.7.1)
Fault icon
(see Section 9)
Soft key legends
Status icon bar
(see Section 4.4
)
Transducer number
("1" always shown)
Software health indicator
Gases being measured
Measurement units
Pressure compensation
indicator *
Current measurement 1
Service in progress icon
(see
Section 6.2.2)
mA Ranges
(see Section 5.7.1)
Current measurement 2
Maintenance required icon
(
see Section 6.2.2)
Transducer numbers
Flow icon #
(see Section 7.3)
Status icon bar
(see Section 4.4)
Software health indicator
Soft key legends
05410001A / Revision 6 13

4 – Analyser user interface MultiExact Gas Analyser
☞
During normal analyser operation, the software health indica
tor continuously
moves from left to right and then back again, below the status icon bar. If the
indicator stops moving, this means that the analyser is not operating correctly,
and you must refer to Section 9.
☞
If no soft key is pressed for 10
minutes, the measurement screen will be
automatically displayed. (You will also then have to enter the password again
to access any password-protected screens: refer to Figure 4
and
to Section 4.6.)
4.3 Soft key legends
The four soft key legends at the bottom of the measurement screen (Figure 3)
correspond to the four soft keys on the front of the analyser. (The first, left-most,
legend corresponds to the function of soft key 1, the second legend corresponds to
the function of soft key 2, and so on.) On the measurement screen, the soft key
functions are as follows:
Legend
Meaning
Function (when soft key pressed)
Menu
Displays the menu screen: see Section 4
Calibrate *
Displays the calibrate screen: see Sections 6 and 6.2
Alarm *
Displays the alarm option screen: see Section 5.11.1
–
None (no effect)
*
These soft keys are 'shortcuts' to the described functions, which are also accessible from
the menu structure.
14 05410001A / Revision 6