Servomex 1900 User manual

Part Number: 01910001A
Revision: 1
Language: UK English
Operator Manual
SERVOTOUGH 1900 Digital
Gas Analyser
PROCESS ANALYSERS

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1900 Digital O2Gas Analyser
01910001A / Revision 1 i
1 DESCRIPTION AND DEFINITIONS. . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Scope of this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Safety information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.3 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.4 Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.5 Analyser options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 SPECIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Sample gas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Calibration gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Environmental limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.6 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.7 Hazardous area certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 UNPACK THE ANALYSER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4 ANALYSER USER INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2 Start-up and measurement screens . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3 Soft key legends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.4 Status icon bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.5 Scroll bars. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.6 Menu options/screens and password protection . . . . . . . . . . . . . . 17
4.7 The Menu screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.8 The Settings screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.9 The Information screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.10 Editing on-screen data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5 INSTALLATION AND SET-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.1 Mechanical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.2 Remove the power/interface compartment cover. . . . . . . . . . . . . . 24
5.3 Electrical supply and interface signal connections . . . . . . . . . . . . . 24
5.4 Electrical safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.5 Configure the cable entry hole(s) . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.6 Interface signal connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.7 Mains electrical supply connection . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.8 Refit the power/interface compartment cover. . . . . . . . . . . . . . . . . 28
5.9 External earth (ground) connection . . . . . . . . . . . . . . . . . . . . . . . . 28
5.10 Connect the sample/calibration gas pipe(s) . . . . . . . . . . . . . . . . . . 29
5.11 Switch on/set-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.12 Selecting the security level and changing the password(s) . . . . . . 30
5.13 Setting the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.14 Changing regional settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
LIST OF CONTENTS
Section Page
Ipsitech SM/029-2007

1900 Digital O2Gas Analyser
01910001A / Revision 1ii
6 GENERAL OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.1 Calibrating the analyser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.2 Taking sample readings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.3 Selecting display units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.4 Configuring the measurement alarms . . . . . . . . . . . . . . . . . . . . . . 39
6.5 Alarm modes and levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.6 Latching/non-latching alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.7 Hysteresis levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.8 Setting the measurement alarm levels and modes . . . . . . . . . . . . 41
6.9 Unlatching measurement alarms . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.10 Viewing the measurement alarm status. . . . . . . . . . . . . . . . . . . . . 42
6.11 Configuring and using the milliAmp output . . . . . . . . . . . . . . . . . . 43
6.12 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
6.13 Introduction to the milliAmp output parameters . . . . . . . . . . . . . . . 44
6.14 Setting up the milliAmp output parameters . . . . . . . . . . . . . . . . . . 45
6.15 Selecting the Range associated with a measurement . . . . . . . . . . 46
6.16 Calibrating the milliAmp output . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6.17 Checking the milliAmp output . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.18 Checking the relay signal outputs . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.19 Adjusting the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6.20 Adjusting the backlight timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6.21 Adjusting the contrast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.22 Switching off the analyser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7 ROUTINE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.1 Cleaning the analyser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.2 Replacing the inlet filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.3 Inspecting/replacing the fuse (when necessary) . . . . . . . . . . . . . . 54
7.4 Removing the cover and replacing the fuse . . . . . . . . . . . . . . . . . 54
7.5 Refitting the cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.6 Use of the analyser with toxic gases . . . . . . . . . . . . . . . . . . . . . . . 56
7.7 Preventative maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8 FAULT FINDING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
8.1 Introduction to faults and fault messages . . . . . . . . . . . . . . . . . . . 58
8.2 Viewing fault messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
8.3 General fault finding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9 STORAGE AND DISPOSAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
9.1 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
9.2 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
10 SPARES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
CONTENTS (CONTINUED)
Section Page

1900 Digital O2Gas Analyser
01910001A / Revision 1 iii
A1 DISPLAY UNIT CONVERSION FACTORS . . . . . . . . . . . . . . . . . . 66
A2 PANEL MOUNTING THE ANALYSER . . . . . . . . . . . . . . . . . . . . . 67
A2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
A2.2 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
A2.3 Fit the analyser with the mounting kit . . . . . . . . . . . . . . . . . . . . . . 67
A3 MATERIALS IN CONTACT WITH SAMPLE AND CALIBRATION
GASES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
A4 PRODUCT DISPOSAL/APPLICABILITY OF THE WASTE
ELECTRICAL AND ELECTRONIC EQUIPMENT (WEEE)
DIRECTIVE 2002/96/EC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
A5 COMPLIANCE AND STANDARDS INFORMATION . . . . . . . . . . . 73
A6 ATEX CERTIFICATES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
® Chemraz is a registered trademark of Greene, Tweed.
® Viton is a registered trademark of Dupont.
© This manual is copyright, and no part of it may be reproduced without Servomex’s written approval.
CONTENTS (CONTINUED)
Section Page

1900 Digital O2Gas Analyser
01910001A / Revision 1iv
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1900 Digital O2Gas Analyser
01910001A / Revision 1 1
1 DESCRIPTION AND DEFINITIONS
1.1 Scope of this manual
This manual provides installation, operation and routine maintenance instructions for
the Servomex 1900 Digital O2Gas 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:
This manual also incorporates ‘Be aware of’ information, which is used as follows:
1.3 Description
The analyser provides stable, accurate and specific gas concentration measurements,
and is suitable for use in hazardous areas.
The analyser uses a paramagnetic transducer to determine the oxygen (O2) content
of gas samples in concentrations of up to 21%.
The analyser is simple to operate, with an intuitive user interface (see Section 4).
Gas sample measurements are shown on the analyser display, and are also provided
as milliAmp outputs. The analyser also provides fault, alarm and milliAmp range
change signal outputs.
The analyser requires little routine maintenance (see Section 7), other than calibration
(which is essential for the accuracy of sample gas measurements) and regular
inspection of the optional inlet filter.
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 highlights information which it is useful for you to be aware of
(for example, specific operating conditions, and so on).

1900 Digital O2Gas Analyser
01910001A / Revision 12
1.4 Construction
The analyser comprises an aluminium enclosure, with Viton®/silicone rubber seals.
Refer to Figure 1. The analyser has two internal compartments:
• Sample/control compartment
This compartment (shown in Figure 3, page 5) contains intrinsically safe
components such as the sample measurement transducer and the heater. The
heater maintains a stable temperature of 60 oC within the compartment, to
ensure stability of sample measurements.
The sample gas inlet and outlet connections on the base of the analyser (see
Figure 2) are piped into/from this compartment.
This compartment is accessed through the hinged door (1), on which the display
(2) and soft keys (9, 10, 12, 14) are mounted.
• Power/signal compartment
This explosion-proof compartment (shown in Figure 4, page 6) contains the
components which supply power to the rest of the analyser, and the components
to interface the analyser to your control/monitoring system.
The analyser electrical supply cable, and the communications cables to your
control/monitoring system, must be connected (through the cable entry holes on
the base of the analyser) to the terminals in this compartment.
You must remove the threaded cover (Figure 1, item 7) to access this
compartment.
1.5 Analyser options
The standard analyser can be supplied with the following options:
• With an inlet filter.
• With an internal high flow bypass, for high sample flows.
•WithViton
®pipelines, or with stainless steel pipelines.
• With a solvent resistant transducer.
Note that an analyser with a solvent-resistant transducer always has stainless steel
pipelines, together with Chemraz®and PTFE seals.

1900 Digital O2Gas Analyser
01910001A / Revision 1 3
* The locking screw may be in a different orientation with respect to the cover (6),
depending on how the cover has been fitted.
† On the side of the analyser.
Figure 1 - Front of the analyser
Key Description Key Description
1.
2.
3.
4.
5.
6.
7.
Hinged cover
Display
Sample gas label
Locking screws (4 off)
Locking screw *
Identification/rating label †
Threaded cover
8.
9.
10.
11.
12.
13.
14.
Certification label
Soft key 4
Soft key 3
Fault LED (red)
Soft key 2
Alarm LED (yellow)
Soft key 1

1900 Digital O2Gas Analyser
01910001A / Revision 14
Figure 2 - Base of the analyser
Key Description Key Description
1.
2.
3.
4.
Cable entry holes (3 off)
Earth (ground) terminal
Sample gas inlet
Breather vent
5.
6.
7.
Inlet/outlet bulkhead
Sample gas outlet
M4 screws (8 off)

1900 Digital O2Gas Analyser
01910001A / Revision 1 5
Figure 3 - Sample/control compartment
A.
B.
C.
With Viton pipelines and standard inlet/outlet ‘T’ piece
With stainless steel pipelines and optional high flow bypass ‘T’ piece
Replacing the optional inlet filter
Key Description Key Description
1.
2.
3.
4.
5.
6.
7.
Transducer
Pipe connector nuts (2 off)
High flow bypass ‘T’ piece
Sample gas inlet
Sample gas outlet
Viton pipelines
Standard inlet/outlet ‘T’ piece
8.
9.
10.
11.
12.
13.
14.
Stainless steel pipelines
‘T’ piece connector nuts
Inlet filter
‘O’ ring
Insulation
Bulkhead assembly
M4 screws (8 off)

1900 Digital O2Gas Analyser
01910001A / Revision 16
Figure 4 - Power/signal compartment
Key Description
1.
2.
3.
4.
5.
6.
7.
8.
9.
Earth (ground) connection
Fault relay (relay 3)
Range change relay (relay 4)
Electrical supply connection terminals
Fuse F101
Relay terminals
Alarm 1 relay (relay 1)
Alarm 2 relay (relay 2)
milliAmp output terminals

1900 Digital O2Gas Analyser
01910001A / Revision 1 7
2 SPECIFICATION
2.1 General
2.2 Sample gas
WARNING
You must install and use the analyser in accordance with the
requirements of this section and subsequent sections of the manual. If
you do not, people may be injured, the protection facilities incorporated
into the design of the analyser may not operate as intended, sample gas
measurements may not be accurate, or the analyser may be damaged.
Dimensions
Analyser
Standard mounting
Panel mounting
235 x 448 x 229 mm (height x width x depth)
See Figure 13 (page 23)
See Figure A1 (page 68)
Mass 26 kg
WARNING
The analyser is not suitable for use with oxygen enriched sample gases.
The sample gases must be clean, non-corrosive, free from oil/condensates
and compatible with the materials listed in Appendix A3.
Flow rate *
Standard inlet/outlet ‘T’ piece 50 to 250 ml min-1
High flow bypass ‘T’ piece 50 to 70 l h-1 (60 l h-1 nominal)
Pressure range * 0.3 to 0.4 kPa gauge above ambient pressure †
(0.04 to 0.05 psig above ambient pressure †)
Dew point 5 oC below ambient temperature (minimum)
Temperature < ambient temperature
Particulate size < 3 μm (3 micron)
* The pressure and flow rate of the sample gases must be externally regulated to
meet the above requirements.
† Refer to Section 2.4 for the ambient pressure range.

1900 Digital O2Gas Analyser
01910001A / Revision 18
2.3 Calibration gases
2.4 Environmental limits
The calibration gases must be clean, non-corrosive, free from oil/
condensates and compatible with the materials listed in Appendix A3.
Low calibration gas Clean, dry nitrogen, 99.9% pure
High calibration gas Clean gas supply with nominal ’atmospheric’
oxygen concentration (20.95%). *
Pressure As for sample gas pressure: see Section 2.2
Flow rate As for sample gas flow rate: see Section 2.2
* For example, you could use good quality, clean, dry instrument air.
WARNING
The installation of the analyser in a hazardous area must comply with any
‘Special conditions for safe use’ and/or ‘Schedules of Limitations’ as
specified in the safety certification.
WARNING
The analyser is not suitable for use in oxygen enriched atmospheres.
Ambient temperature range
Operation -10 to 50 oC
Storage -20 to 60 oC
Operating ambient pressure range 79 to 124 kPa (11 to 18 psi absolute)
Operating ambient humidity range 0 to 95% RH, non-condensing
Operating altitude range -500 * to 2000 †meters
Ingress protection IP65
* Below sea level.
† Above sea level.

1900 Digital O2Gas Analyser
01910001A / Revision 1 9
2.5 Electrical data
Electrical supply
Voltage 100 to 120 V a.c. or 220 to 240 V a.c. *
Frequency 50 to 60 Hz
Maximum power consumption 50 VA
Internal fuse rating
100 to 120 V supply T 2.0 A H 250 V
220 to 240 V supply T 1.0 A H 250 V
Electrical supply terminals
suitable for
Flexible conductors 0.5 to 1.5 mm2(20 to 16 AWG)
Solid conductors 0.5 to 2.5 mm2(20 to 14 AWG)
Interface signal relay ratings ‡250 V a.c., 3 A, 28 V d.c. 1 A
milliAmp output
Maximum load resistance 600 Ω
Minimum isolation voltage 500 V
Output range
Normal sample measurement 0 to 20 mA or 4 to 20 mA †
Fault condition 0 mA or 21.5 mA †
Under range #< 4 mA
Signal/milliAmp 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 analyser is supplied configured for operation with one of these voltage
ranges. You must specify the voltage range when you order the analyser.
‡ The relay output signals are volt-free signals.
† User selectable: see Sections 6.5.2 and 6.5.3.
# Only available when the 4 to 20 mA output range is selected:
see Sections 6.5.2 and 6.5.3.

1900 Digital O2Gas Analyser
01910001A / Revision 110
2.6 Performance
The display indications given below are the default indications. You can
configure the analyser to provide other display indications (see Section 6.3).
Display indication Measured volume % oxygen
Targeted measurement range 0 to 21% oxygen
Linearity < 0.02% oxygen (inherently linear)
Intrinsic error (accuracy) < 0.05% oxygen
Zero drift per week < 0.05% oxygen
Output fluctuation < 0.01% oxygen
Response time * < 6 seconds
Flow effect †< 0.1%oxygen
Zero temperature coefficient ‡0.03% oxygen per 10 oC change in
temperature
Pressure effects 1% of measurement per 1% change in
ambient barometric pressure
*T
90 at maximum sample gas supply flow rate specified in Section 2.2.
† Within sample gas supply pressure range specified in Section 2.2.
‡In the range -10 to 50 oC.

1900 Digital O2Gas Analyser
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2.7 Hazardous area certification
When correctly installed as described in this manual, the analyser is certified to
operate in the following hazardous areas (as specified by the certification label fitted
to the analyser, see Figure 5):
• Europe
The analyser is ATEX approved to II 2G Ex ia d IIC T4 (-10 oC ≤Ta ≤+50 oC)
Certificate number: Baseefa 06ATEX0050 (see Appendix A6)
• International
The analyser is IECEx approved to Ex d ia IIC T4 (-10 oC ≤Ta ≤+50 oC)
Certificate number: IECEx BAS06.0024
Figure 5 - Certification label

1900 Digital O2Gas Analyser
01910001A / Revision 112
• North America
The analyser is CSA approved for use in USA and Canada in the following
locations:
Class I, Division 1, Groups A, B, C, D T4 (-10 oC ≤Ta ≤+50 oC)
Class I, Zone 1, Ex ia d IIC T4 (-10 oC ≤Ta ≤+50 oC)
Class I, Zone 1, AEx ia d IIC T4 (-10 oC ≤Ta ≤+50 oC)
Certificate number: CSA 08.1961540
Figure 6 - Certification label