Metek 920 User manual

Model 920 Multi-Gas Analyzer
Operator’s Guide
With Essential Health and Safety Requirements
PN 903-8765, Rev. E
Canada
A DIVISION OF AMETEK PROCESS & ANALYTICAL INSTRUMENTS
Western Research

ii | Model 920 Multi-Gas Analyzer
© 2014–2019 AMETEK Canada, A Division of AMETEK Process & Analytical Instruments Printed in Canada
This manual is a guide for the use of the Model 920 Multi-Gas Analyzer. Data herein has been veried and validated and is believed adequate for the
intended use of this instrument. If the instrument or procedures are used for purposes over and above the capabilities specied herein, conrmation of
their validity and suitability should be obtained; otherwise, AMETEK does not guarantee results and assumes no obligation or liability. This publication is
not a license to operate under, or a recommendation to infringe upon, any process patents.
O󰀩ces
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Contents | iii
Contents
Offices .................................................................................................................................. ii
Safety Notes ....................................................................................................................... ix
Electrical Safety.................................................................................................................. ix
Grounding.......................................................................................................................... ix
Personnel and Equipment Safety Information.............................................................. x
Warnings ....................................................................................................................... x
Cautions ...................................................................................................................... xii
Warning Labels................................................................................................................ xiii
Environmental Information .......................................................................................... xiii
UV Source Lamps Disposal ........................................................................................... xiii
Electromagnetic Compatibility (EMC)......................................................................... xiv
Special Warnings and Information................................................................................ xv
Equipment Used in Hazardous Locations............................................................. xv
EU Declaration of Conformity ...................................................................................... xvi
Warranty and Claims....................................................................................................xviii
CHAPTER 1 OVERVIEW....................................................................................................... 1-1
About the Analyzer......................................................................................................... 1-2
Sample Flow .............................................................................................................. 1-3
About the Analyzer Sample System............................................................................. 1-3
Temperature Control System......................................................................................... 1-8
Sample/Vent Lines .................................................................................................... 1-8
Measuring Cell.......................................................................................................... 1-8
Working in This Manual ................................................................................................ 1-9
Supplemental Information – Where Can I Find It?................................................. 1-10
CHAPTER 2 SPECIFICATIONS ........................................................................................... 2-1
Methodology.................................................................................................................... 2-1
Standard Ranges....................................................................................................... 2-1
Response Time................................................................................................................. 2-2
Accuracy............................................................................................................................ 2-2
Repeatability .................................................................................................................... 2-2
Calibration........................................................................................................................ 2-2
Linearity............................................................................................................................ 2-2
Zero Stability.................................................................................................................... 2-2
Cross-Talk.......................................................................................................................... 2-2
Temperature Drift............................................................................................................ 2-3
24-Hour Zero Drift .......................................................................................................... 2-3
Customer Connections................................................................................................... 2-3
Analog Outputs ........................................................................................................ 2-3
Digital Communication ........................................................................................... 2-3

iv | Model 920 Multi-Gas Analyzer
Maximum Sample Gas Pressure ................................................................................... 2-4
Electrical Requirements.................................................................................................. 2-4
Maximum Start-Up Power ..................................................................................... 2-4
Supply Voltage .......................................................................................................... 2-4
Status Relays .................................................................................................................... 2-4
Sample Gas Flow Rate.................................................................................................... 2-4
Ambient Limits ................................................................................................................ 2-5
Temperature............................................................................................................... 2-5
Humidity.................................................................................................................... 2-5
Maximum Altitude ................................................................................................... 2-5
Sample Transport ............................................................................................................ 2-5
Instrument Air Requirements ....................................................................................... 2-5
Physical Dimensions (on Backpan).............................................................................. 2-5
O2Concentration Signal (Optional)............................................................................. 2-6
Speed of Response.................................................................................................... 2-6
Accuracy..................................................................................................................... 2-6
Repeatability.............................................................................................................. 2-6
24-Hour Zero Drift ................................................................................................... 2-6
Temperature Drift..................................................................................................... 2-6
Electrical Classification ............................................................................................ 2-6
SO2Concentration Signal (Optional) .......................................................................... 2-7
Full-Scale Maximum................................................................................................. 2-7
Cross Interference .................................................................................................... 2-7
Linearity..................................................................................................................... 2-7
Reproducibility ......................................................................................................... 2-7
Temperature Coefficient.......................................................................................... 2-7
Speed of Response.................................................................................................... 2-7
Zero Stability ............................................................................................................. 2-7
NOxConcentration Signals ........................................................................................... 2-8
Full Scale Maximum................................................................................................. 2-8
Cross Interference .................................................................................................... 2-8
Linearity..................................................................................................................... 2-8
Ambient Temperature Coefficient.......................................................................... 2-8
Reproducibility ......................................................................................................... 2-8
Speed of Response.................................................................................................... 2-8
Zero Stability ............................................................................................................. 2-8
Cable Entry Ports, Type 200 Disconnect Enclosure.................................................... 2-9
Approvals and Certifications......................................................................................... 2-9
ATEX and IECEx Certificates and Analyzer Markings..................................... 2-10
Purged Analyzer ATEX and IECEx Certificates and Markings....................... 2-10
Systems with 30 psia Pressure Transducer (Maximum 63 kPag
Sample Gas Pressure) ..................................................................................2-18
Systems with 100 psia Pressure Transducer (Maximum 350 kPag
Sample Gas Pressure) ..................................................................................2-18
Heater Plate ATEX and IECEx Certificates and Marking................................ 2-19
Disconnect Enclosure Type 200 ATEX and IECEx Certificates and Marking . 2-26

Contents | v
CHAPTER 3 INSTALLATION AND START-UP................................................................... 3-1
Safety Considerations..................................................................................................... 3-2
Pre-Installation Requirements....................................................................................... 3-2
Storage Prior to Installation .................................................................................... 3-2
Uncrating and Inspecting the Analyzer................................................................ 3-3
Tools and Equipment Required.............................................................................. 3-4
Installing the Mechanical Components....................................................................... 3-5
Installing the Analyzer............................................................................................. 3-5
Location and Environment.................................................................................. 3-5
Installing the Optical Bench Assembly ................................................................. 3-7
Installing the Sample System................................................................................ 3-12
Installing the Sample Probe, SCU, or Steam Jacketed Sample/Vent Valves...... 3-12
Installing the Sample and Vent Lines................................................................ 3-13
Installing the Steam Lines (if Used).................................................................. 3-19
Installing Insulation Around the Valve Assemblies.......................................... 3-20
Installing the Instrument Air Line ................................................................... 3-21
Installing the Span/Zero Gas Lines................................................................... 3-22
Connecting I/O Signals, Alarm Relay Contacts, and AC Power ............................ 3-23
Start-Up and Verification ............................................................................................. 3-29
Purged Analyzers ................................................................................................... 3-30
Powering Up the Analyzer.................................................................................... 3-32
Start-Up Diagnostic Checklist .......................................................................... 3-37
Sample System Leak Check .................................................................................. 3-40
Manually Zeroing the Analyzer........................................................................... 3-42
Setting the Zero Gas Flow Rate............................................................................ 3-43
Setting the Sample Gas Flow Rate and Sample Response Time..................... 3-44
Normal Operation......................................................................................................... 3-45
Recording Initial Readings.................................................................................... 3-45
Recording PMT Signals.................................................................................... 3-45
Recording Initial Sample Response Time .......................................................... 3-46
Analyzer Configuration ............................................................................................... 3-47
CHAPTER 4 CONTROLLER / USER INTERFACE............................................................. 4-1
Introduction to the User Interface................................................................................ 4-2
User Interface Components.................................................................................... 4-2
Messages/Information Displayed on the User Interface.................................... 4-4
Navigating From the User Interface...................................................................... 4-5
Working in RUN Mode....................................................................................... 4-6
Working in CFG Mode........................................................................................ 4-6
Working in CAL Mode ........................................................................................ 4-7
Navigation Examples .......................................................................................... 4-8
Entering Passwords to Change Analyzer Parameter Settings........................... 4-10
Changing the Password for CFG / CAL Mode.............................................4-10
RUN / CFG Mode Quick Reference Sheet – Keystroke Commands.................. 4-12
CAL Mode Quick Reference Sheet – Keystroke Commands.............................. 4-13

vi | Model 920 Multi-Gas Analyzer
Working in the RUN / CFG Operating Modes ......................................................... 4-14
RUN / CFG Mode – F1 Commands ..................................................................... 4-15
RUN / CFG Mode – F2 Commands ..................................................................... 4-17
RUN / CFG Mode – F3 Commands ..................................................................... 4-20
RUN / CFG Mode – F4 Commands ..................................................................... 4-21
RUN / CFG Mode – F5 Commands ..................................................................... 4-23
RUN / CFG Mode – F6 Commands ..................................................................... 4-25
Configuring the Analyzer Control Functions ................................................... 4-28
Output Signal Assignment (OSA)..............................................................4-28
Assigning Output Signals With the Track-and-Hold Function
Enabled/Disabled .........................................................................................4-29
Analog Input Channels – Micro-Interface Board.............................................. 4-30
Display I/O Board Analog Input Signals ....................................................4-31
Working in the CAL Operating Mode ....................................................................... 4-32
CAL Mode – F1 Commands.................................................................................. 4-33
CAL Mode – F2 Commands.................................................................................. 4-34
CAL Mode – F3 Commands.................................................................................. 4-35
CAL Mode – F4 Commands.................................................................................. 4-36
CAL Mode – F5 Commands.................................................................................. 4-37
CAL Mode – F6 Commands.................................................................................. 4-39
Setting Up Analyzer Calibration Functions ....................................................... 4-40
Flow Control (Sample) Modes........................................................................... 4-40
Analyzer Control Mode (Automatic Control by Analyzer).........................4-41
Continuous Backpurge Flow Mode (Manual Control by Operator) ...........4-42
Continuous Sample Flow Mode (Manual Control by Operator).................4-42
Continuous Zero Gas Flow Mode (Manual Control by Operator)..............4-42
Continuous Calibration Gas Flow Mode (Manual Control by Operator)...4-43
Setting Calibration Gas Timers............................................................................. 4-44
Timer0, Timer1, Timer2..................................................................................... 4-44
Integration Timer (IntTime).............................................................................. 4-45
Auto-Calibration Interval Timer (ACal) ........................................................... 4-45
Auto-Zero Interval Timer (AZInt).................................................................... 4-45
Setting the Sample Delay Timer (SDelay) ........................................................ 4-46
Manual Zero/Span.................................................................................................. 4-47
Manual Zero...................................................................................................... 4-47
Manual Span..................................................................................................... 4-47
Spanning Dual Range....................................................................................... 4-51
Solenoid Valve Control ...................................................................................... 4-53
Calculated Result Name ..............................................................................4-54
SSR Output Assignment .................................................................................. 4-55
Auto-Zero/Auto-Span ............................................................................................ 4-58
Manual Start of Auto-Zero ............................................................................... 4-60
Timed Start of Auto-Zero .................................................................................. 4-60
Manual Start of Auto-Span............................................................................... 4-61

Contents | vii
Auto-Calibration ..................................................................................................... 4-62
Timed Start of Auto-Calibration ....................................................................... 4-62
Manual Start of Auto-Calibration..................................................................... 4-63
Remote Start of Auto-Calibration ..................................................................... 4-64
Analog Output Calibration ................................................................................... 4-66
Probe Blow-Back Control (Optional) ................................................................ 4-68
CHAPTER 5 MAINTENANCE AND TROUBLESHOOTING............................................... 5-1
Safety Considerations..................................................................................................... 5-1
Preventive Maintenance ................................................................................................ 5-2
Analyzer Preventive Maintenance Schedule....................................................... 5-3
Expo Technologies MiniPurge®System With eTimer (Optional) Preventive
Maintenance Schedule......................................................................................... 5-6
Preventing, Detecting, and Locating a Plug in the Sample System................. 5-6
Changing Out Replaceable Parts ........................................................................... 5-8
Measuring Cell Maintenance.............................................................................. 5-8
Replacing the Source Lamps.............................................................................. 5-17
When Do Source Lamps Need to be Replaced?............................................5-17
About the Source Lamps ..............................................................................5-17
Source Lamp Replacement...........................................................................5-18
When is an Auto-Setup Required / Not Required?......................................5-25
Auto-Setup Completion Number.................................................................5-25
PMT Level and PMT Balance .....................................................................5-26
Auto-Setup Fault Messages and Corrective Action.....................................5-27
The Auto-Setup Sequence ............................................................................5-28
Manipulating the Completion Number, PMT Level, and PMT Balance ....5-29
Chopper Assembly Maintenance ....................................................................... 5-31
Replacing Parts in the Heater Plate................................................................... 5-40
Optional HAG Sample Probe Preventive Maintenance.................................... 5-54
Examining and Caring For the Flamepaths ....................................................... 5-55
Disconnect Enclosure Flamepath (Joining Surfaces)......................................... 5-56
Heater Plate Flange Flamepath (Joining Surfaces)............................................ 5-57
Troubleshooting and Diagnostics ............................................................................... 5-58
Host Controller Board Alarm Conditions and Corrective Action .................. 5-60
Microcontroller Board Alarm Conditions and Corrective Action .................. 5-68
Analyzer Reset ........................................................................................................ 5-72

viii | Model 920 Multi-Gas Analyzer
CHAPTER 6 SERVICE AND PARTS.................................................................................... 6-1
Technical Support............................................................................................................ 6-1
Returning Equipment..................................................................................................... 6-2
?? ANSWERS TO YOUR QUESTIONS ??................................................................... 6-3
AMETEK SERVICE and AFTERMARKET SALES SUPPORT............................ 6-3
Recommended Preventive Maintenance Spare Parts ............................................... 6-4
Optical Bench/Measuring Cell Spare Parts........................................................... 6-4
Expo Technologies MiniPurge®System With eTimer Spare Parts.................... 6-5
Sample Conditioning Unit (SCU) Spare Parts ..................................................... 6-6
Spare Analyzer Fuses ............................................................................................... 6-7
Replacement Boards................................................................................................. 6-9
Oven Heater Spare Parts ....................................................................................... 6-10
Ordering a Hard Copy of the Analyzer Operator’s Guide .............................. 6-10
CHAPTER 7 GLOSSARY...................................................................................................... 7-1
User Interface Abbreviations......................................................................................... 7-1
Abbreviations and Terms Used in This Manual ......................................................... 7-2
APPENDIX A – DRAWINGS...................................................................................................A-1
Ribbon Cable Interconnect (WX-102836).................................................................... A-2
GP Lower Enclosure to Electronics Wiring, CE Analyzers (WX-102810) .............. A-3
Heater and Sensor Wiring, GP/Div 2 Analyzers (WX-102851)................................ A-4
Heater and Sensor Wiring, CE/Zone 1 Analyzers (WX-102852) ............................. A-5
Lower Cabinet Wiring, CE/GP Analyzers, 120V (100-1341-3) ................................. A-6
Lower Cabinet Wiring, CE/GP Analyzers, 240V (100-1342-3) ................................. A-7
Signal Wiring, PD/GP/Div 2/CE/Zone 1 Analyzers (WX-102815) ........................... A-8
Wiring Diagram, All Seals, Zone 1 Analyzers (100-1343-10).................................... A-9
± 15V and 5V Power Supply DC Wiring, GP/Div 2/CE/Zone 1 Analyzers
(WX-102811) .................................................................................................................. A-10
24V Power Supply DC Wiring, CE/Zone 1 Analyzers (WX-102812)..................... A-11
RS-232 Communications Cable Wiring (300-9480).................................................. A-12
RS-232/RS-485 Module Wiring, CE/Zone 1 & GP/Div 2 Analyzers (100-2185) ... A-13
Microcontroller Board (100-0117) .............................................................................. A-14
Host Controller Board (Display Interface) (100-0138) ............................................ A-15
Model 9xx-Series Analyzer Type 200 Disconnect Enclosure Details.................... A-16
SUPPLEMENTAL INFORMATION ........................................................................................S-1

Contents | ix
Safety Notes
WARNINGS, CAUTIONS, and NOTES contained in this manual emphasize critical instructions
as follows:
An operating procedure which, if not strictly observed, may result in personal injury or envi-
ronmental contamination. Essential Health and Safety Requirements are also included in
– but are not limited to – Warnings.
An operating procedure which, if not strictly observed, may result in damage to the equipment.
Important information that should not be overlooked.
Electrical Safety
High voltages are present in the analyzer housings. Always shut down power source(s) before
performing maintenance or troubleshooting. Only a qualified electrician should make electrical
connections and ground checks.
Any use of the equipment in a manner not specified by the manufacturer may impair the safety
protection originally provided by the equipment.
Grounding
Instrument grounding is mandatory. Performance specifications and safety protection are void if
instrument is operated from an improperly grounded power source.
Verify ground continuity of all equipment before applying power.
!
WARNING
!
CAUTION

NOTE
!
CAUTION

x | Model 920 Multi-Gas Analyzer
Personnel and Equipment Safety Information
This section describes important safety information to avoid personal injury and damage to the
equipment while installing, operating, maintaining, or servicing the equipment. All safety regu-
lations, standards, and procedures at the analyzer location must be followed.
All personnel involved with the installation, start-up, operation, maintenance, service, or trou-
bleshooting of the analyzer must review and follow these Warnings and Cautions.
Warnings
Review and follow these Warnings to avoid personal injury or environmental contamination.
Always disconnect main AC power and/or external power sources to the analyzer before open-
ing any covers or doors on the analyzer to check or perform maintenance on any components
within the enclosures.
If it is necessary to open the analyzer’s covers or doors while the circuits are live, test the area
for flammable gases (and proceed only when the area is safe).
Purged Analyzer (Hazardous Location) Applications
To work on the analyzer with it powered up and its Electronics Enclosure door open, the Purge
Bypass Switch must be in the “BYPASS” position.
When the Electronics Enclosure door is open, take appropriate precautions to avoid electrical
shock. Hazardous voltages are present inside.
All electrical connections, adjustments, or servicing of the analyzer should be performed only
by properly trained and qualified personnel.
All electrical connections, materials, and methods (plus all safety policies and procedures) must
be made in compliance with local wiring regulations and electrical code for the hazardous area,
and be approved by the Owner Company.
Follow appropriate regulatory and/or company procedures to lock out the analyzer while work-
ing on its electronics.
Before working on the sample system, confirm that the system is purged with Zero gas and is
isolated (blocked in) from the sample stream.
!
WARNING
!
WARNING
!
WARNING
!
WARNING

Contents | xi
Because ultraviolet radiation can harm your eyes, avoid direct viewing of the light emanating
through the end window of the source lamp. If the source lamp must be viewed while ener-
gized, wear safety glasses that block ultraviolet radiation.
The Analyzer Oven enclosure and components within the Analyzer Oven are hot; take precau-
tions to avoid burning yourself.
Purged Analyzer (Hazardous Location) Applications
[Special Conditions for Safe Use]
The analyzer may only be energized by using the Purge Bypass Switch with permission of
the works manager or his proxy. The permission may only be given when it is made sure that
during the time the system is energized by using this switch an explosive atmosphere is not
present or when the necessary protective measures against explosion hazard have been taken
(“hot permit”).
The analyzer enclosure may not be opened when an explosive atmosphere is present.
Purged Analyzer (Hazardous Location) Applications
Do not apply power to the analyzer if there is damage (scratches, indentations, or wear) to any
flamepath (on the Oven Heater or Disconnect Enclosure). Applying power to an analyzer with
a damaged flamepath is dangerous and could result in serious injury or death, or serious dam-
age to equipment. See “Examining and Caring for the Flamepaths” in Chapter 5.
Replace parts immediately if damage or wear is apparent. Contact AMETEK if there is any
doubt about the integrity of any flamepath.
!
WARNING
!
WARNING
!
WARNING
!
WARNING

xii | Model 920 Multi-Gas Analyzer
Cautions
Review and follow these Cautions to avoid damaging the equipment.
The electronic circuit boards and other static-sensitive components should be stored and trans-
ported in static-shielding carriers or packages.
For electrical-shock protection, the analyzer must be operated from a grounded power source
that has a securely connected protective-ground contact.
If it becomes necessary to handle any of the electronic circuit boards, do not subject the boards
to static discharge. The ideal solution is a static-safe work area. Since such areas typically
are not available at analyzer installation sites, the use of a wrist strap connected directly to a
ground is recommended. If a wrist strap is not available, you should at the very least touch the
metal chassis (to ground yourself) before handling or touching the boards.
When handling the source lamps, it is very important not to touch the lamp windows because
residual oils from the fingers will absorb ultraviolet light. The window is the flat surface at the
end of the narrow glass tube. The lamp assembly is fragile and should be handled with care.
Purged Analyzer (Hazardous Location) Applications
M25 x 1.5, 6H cable entries are provided for Power (1 entry) and Signals (2 entries). See the
Model 9xx-Series Analyzer Type 200 Disconnect Enclosure Details drawing in Appendix A
for cable entry locations. In all cases, all unused cable entry ports must be plugged with a certi-
fied Ex d plug.
For Division 1/Zone 1 Installations, all cable entry glands (one power cable entry and two
signal cable entries) into the flameproof Disconnect Enclosure must be Ex d certified. Conduit
or cable seals that comply with the flameproof enclosure cable entry sealing requirements of the
local authority must be installed at the entries to the disconnect enclosure.
For Division 2/Zone 2 Installations that do not use the Disconnect Enclosure, use a suitable
cable entry device with a sealing ring that meets the local requirements for entries into pres-
surized enclosures.
!
CAUTION
!
CAUTION
!
CAUTION
!
CAUTION
!
CAUTION

Contents | xiii
Warning Labels
These symbols may appear on the instrument in order to alert you of existing conditions.
Protective Conductor Terminal
(BORNIER DE L’ECRAN DE PROTECTION)
Schutzerde
Caution – Risk of electric shock
(ATTENTION – RISQUE DE DÉCHARGE ÉLECTRIQUE)
Achtung – Hochspannung Lebensgefahr
Caution – Refer to accompanying documents
(ATTENTION – SE RÉFERER AUX DOCUMENTS JOINTS)
Achtung – Beachten Sie beiliegende Dokumente
CAUTION – Hot Surface
(ATTENTION – SURFACE CHAUDE)
Achtung – Heiße Oberäche
Environmental Information
This AMETEK product contains materials that can be reclaimed and recycled. In some cases the
product may contain materials known to be hazardous to the environment or human health.
In order to prevent the release of harmful substances into the environment and to conserve
our natural resources, AMETEK recommends that you arrange to recycle this product when it
reaches its “end of life”.
Waste Electrical and Electronic Equipment (WEEE) should never be disposed of in a munici-
pal waste system (residential trash). The Wheelie Bin marking on this product is a reminder to
dispose of the product properly after it has completed its useful life and been removed from
service. Metals, plastics, and other components are recyclable and you can do your part by doing
one of the following steps:
• When the equipment is ready to be disposed of, take it to your local or region-
al waste collection administration for recycling.
• In some cases, your “end of life” product may be traded in for credit towards
the purchase of new AMETEK instruments. Contact your dealer to see if this
program is available in your area.
• If you need further assistance in recycling your AMETEK product, contact our
office listed in this manual.
UV Source Lamps Disposal
AMETEK recommends that all UV lamps – whether they are new, used, or damaged in any way
– need to be disposed of in an environmentally safe manner.
Most UV lamps do not contain restricted substances listed under the European RoHS 2 direc-
tive. However, special handling requirements are required for some lamps if they are broken.
Two examples include Cadmium and Beryllium lamps. Refer to a current Material Safety Data
Sheet (MSDS) for handling any lamp where the glass envelope has been broken and which has
exposed the metal cathode in the centre of the lamp.

xiv | Model 920 Multi-Gas Analyzer
Electromagnetic Compatibility (EMC)
Read and follow the recommendations in this section to avoid performance variations or dam-
age to the internal circuits of this equipment when installed in harsh electrical environments.
The various configurations of the Model 920 Multi-Gas Analyzer should not produce, or fall
victim to, electromagnetic disturbances as specified in the European Union’s EMC Directive
(if applicable to your application). Strict compliance to the EMC Directive requires that certain
installation techniques and wiring practices are used to prevent or minimize erratic behavior of
the Analyzer or its electronic neighbors. Below are examples of the techniques and wiring prac-
tices to be followed.
In meeting the EMC requirements, the various Analyzer configurations described in this manual
rely heavily on the use of metallic shielded cables used to connect to the customer’s equipment
and power. Foil and braid shielded I/O and DC power cables are recommended for use in other-
wise unprotected situations. In addition, hard conduit, flexible conduit, and armor around non-
shielded wiring also provides excellent control of radio frequency disturbances. However, use of
these shielding techniques is effective only when the shielding element is connected to the equip-
ment chassis/earth ground at both ends of the cable run. This may cause ground loop problems in
some cases. These should be treated on a case-by-case basis. Disconnecting one shield ground may
not provide sufficient protection depending on the electronic environment. Connecting one shield
ground via a 0.1 microfarad ceramic capacitor is a technique allowing high frequency shield bond-
ing while avoiding the AC-ground metal connection. In the case of shielded cables the drain wire
or braid connection must be kept short. A two-inch connection distance between the shield’s end
and the nearest grounded chassis point, ground bar or terminal is highly recommended. An even
greater degree of shield performance can be achieved by using metallic glands for shielded cable
entry into metal enclosures. Expose enough of the braid/foil/drain where it passes through the
gland so that the shield materials can be wrapped backwards onto the cable jacket and captured
inside the gland, and tightened up against the metal interior.
Inductive loads connected to the low voltage “Alarm Contacts” are not recommended. However, if
this becomes a necessity, adhere to proper techniques and wiring practices. Install an appropriate
transient voltage suppression device (low voltage MOV, “Transzorb,” or R/C) as close as possible to
the inductive device to reduce the generation of transients. Do not run this type of signal wiring
along with other I/O or DC in the same shielded cable. Inductive load wiring must be separated
from other circuits in conduit by using an additional cable shield on the offending cable.
In general, for optimum protection against high frequency transients and other disturbances, do
not allow installation of this Analyzer where its unshielded I/O and DC circuits are physically
mixed with AC mains or any other circuit that could induce transients into the Analyzer or the
overall system. Examples of electrical events and devices known for the generation of harmful
electromagnetic disturbances include motors, capacitor bank switching, storm related transients,
RF welding equipment, static, and walkie-talkies.
!
CAUTION

Contents | xv
Special Warnings and Information
Equipment Used in Hazardous Locations
Refer to Chapter 2 – Specifications for details about the suitability of this equipment in hazard-
ous locations. This analyzer must not be commissioned until a person trained in the area of
evaluating equipment for use in hazardous classified locations has confirmed that this equip-
ment and its installation are in compliance with the requirements for the area.
Explosion Hazard – Do Not Disconnect Equipment Unless Power Has Been Switched Off or
the Area is Known to be Non-Hazardous.
Risque d’explosion – Avant de déconnecter l’équipement, coupez le courant où vous assurez
que l’emplacement est designé non dangereux.
All input and output wiring must be in accordance with wiring methods authorized for the area
classification by the authority having jurisdiction. Ex d glands or stopping boxes (seals) must
be installed on flameproof enclosures and sealing glands must be used for connections made
directly to the pressurized enclosure.
!
WARNING
!
Avertissement

xvi | Model 920 Multi-Gas Analyzer
EU Declaration of Conformity
PN 903-8594 Rev M
EU Declaration of Conformity
Manufacturer’s Name: AMETEK Canada
A Division of AMETEK Process & Analytical Instruments
(ISO 9001:2008 Registered)
Manufacturer’s Address: 2876 Sunridge Way N.E.
Calgary, Alberta, Canada T1Y 7H9
Phone: [phone] / Fax: [phone]
EU Representative Address: AMETEK Precision Instruments Europe GmbH
Rudolf-Diesel-Str. 16
D-40670 Meerbusch, Germany
Phone [phone] / Fax: [phone]
Declare under our sole responsibility that the products:
Product Names: Model 9xx-Series Photometric Analyzers
Model Numbers: 900/930/909/910/919/920
Markings: II 2 G Ex db eb ia pxb IIB T3 Gb (Model 9XX Purged Analyzers)
II 2 G Ex db IIB T3 Gb (900 Series Heater Plate)
II 2 G Ex db IIB T6 Gb (Disconnect Enclosure Type 200)
Conform to the following EU Standards and Directives:
Electromagnetic Compatibility Directive 2014/30/EU using the following standards:
IEC/EN 61326-1 Electrical equipment for measurement, control and laboratory use – EMC requirements –
Part 1: General requirements.
IEC/EN 55011 (CISPR 55011) Radiated Electromagnetic Emissions, Class A 30 MHz to 1 GHz.
IEC/EN 55011 (CISPR 55011) Conducted Electromagnetic Emissions, Class A.
 IEC/EN61000-3-2 Limitsforharmoniccurrentemissions(equipmentinputcurrent≤16Aperphase).
 IEC/EN61000-3-3 Limitationofvoltagechanges,voltageuctuationsandickerinpubliclow-voltagesupply
systems,forequipmentwithratedcurrent≤16Aperphaseandnotsubjecttoconditional
connection.
IEC/EN 61000-4-2 Testing and measurement techniques – Electrostatic discharge immunity test.
 IEC/EN61000-4-3 Testingandmeasurementtechniques–Radiated,radio-frequency,electromagneticeld
immunity test.
IEC/EN 61000-4-4 Testing and measurement techniques – Electrical fast transient/burst immunity test.
IEC/EN 61000-4-5 Testing and measurement techniques – Surge immunity test.
IEC/EN 61000-4-6 Testing and measurement techniques – Immunity to conducted disturbances, induced by
radio-frequencyelds.
 IEC/EN61000-4-8 Testingandmeasurementtechniques–Powerfrequencymagneticeldimmunitytest.
IEC/EN 61000-4-11 Testing and measurement techniques – Voltage dips, short interruptions and voltage
variations immunity tests.
Restriction of Hazardous Substances Directive 2011/65/EU (RoHS 2).
Low Voltage Directive 2014/35/EU using the following standards:
EN 61010-1:2001 Safety Requirements for Electrical Equipment for Measurement, Control, and
Laboratory Use – Part 1. General requirements.
Pressure Equipment Directive 2014/68/EU
Article 4, Paragraph 3
Page 1 of 2
Canada
A DIVISION OF AMETEK PROCESS & ANALYTICAL INSTRUMENTS
Western Research

Contents | xvii
EU Declaration of Conformity
The object of the declaration described [herein] is in conformity with the relevant Union harmonization
legislation (Directive 2014/34/EU):
EN 60079-0:2012+A11:2013 General requirements
 EN60079-1:2014 Equipmentprotectionbyameproofenclosures‘d’
 EN60079-2:2014 Equipmentprotectionbypressurizedenclosures‘p’
 EN60079-7:2015+A1:2018 Equipmentprotectionbyincreasedsafety‘e’
 EN60079-11:2012 Equipmentprotectionbyintrinsicsafety‘i’
 CerticateNumber: KEMA02ATEX2341X(Model9XXPurgedAnalyzers)
KEMA 02ATEX2255 X (900 Series Heater Plate)
KEMA 01ATEX2219 X (Disconnect Enclosure Type 200)
 NotiedBody: DEKRACerticationB.V.0344
Meander 1051, 6825 MJ Arnhem
The Netherlands
____________________________
Randy Meads
Quality Assurance Manager
Calgary, Alberta, Canada
February 12, 2019
Page 2 of 2
Canada
A DIVISION OF AMETEK PROCESS & ANALYTICAL INSTRUMENTS
Western Research

xviii | Model 920 Multi-Gas Analyzer
Warranty and Claims
We warrant that any equipment of our own manufacture or manufactured for us pursuant to our specifications
which shall not be, at the time of shipment thereof by or for us, free from defects in material or workmanship under
normal use and service will be repaired or replaced (at our option) by us free of charge, provided that written notice
of such defect is received by us within twelve (12) months from date of shipment of portable analyzers or within
eighteen (18) months from date of shipment or twelve (12) months from date of installation of permanent equipment,
whichever period is shorter. All equipment requiring repair or replacement under the warranty shall be returned to
us at our factory, or at such other location as we may designate, transportation prepaid. Such returned equipment
shall be examined by us and if it is found to be defective as a result of defective materials or workmanship, it shall
be repaired or replaced as aforesaid. Our obligation does not include the cost of furnishing any labor in connection
with the installation of such repaired or replaced equipment or parts thereof, nor does it include the responsibility
or cost of transportation. In addition, instead of repairing or replacing the equipment returned to us as aforesaid,
we may, at our option, take back the defective equipment, and refund in full settlement the purchase price thereof
paid by Buyer.
Process photometric analyzers, process moisture analyzers, and sample systems are warranted to perform the in-
tended measurement, only in the event that the customer has supplied, and AMETEK has accepted, valid sample
stream composition data, process conditions, and electrical area classification prior to order acknowledgment. The
photometric light sources are warranted for ninety (90) days from date of shipment. Resale items warranty is limited
to the transferable portion of the original equipment manufacturer’s warranty to AMETEK. If you are returning
equipment from outside Canada, a statement should appear on the documentation accompanying the equipment
being returned declaring that the goods being returned for repair are Canadian goods, the name of the firm who
purchased the goods, and the shipment date.
The warranty shall not apply to any equipment (or part thereof) which has been tampered with or altered after
leaving our control or which has been replaced by anyone except us, or which has been subject to misuse, neglect,
abuse or improper use. Misuse or abuse of the equipment, or any part thereof, shall be construed to include, but
shall not be limited to, damage by negligence, accident, fire or force of the elements. Improper use or misapplications
shall be construed to include improper or inadequate protection against shock, vibration, high or low temperature,
overpressure, excess voltage and the like, or operating the equipment with or in a corrosive, explosive or combustible
medium, unless the equipment is specifically designed for such service, or exposure to any other service or environ-
ment of greater severity than that for which the equipment was designed.
The warranty does not apply to used or secondhand equipment nor extend to anyone other than the original
purchaser from AMETEK. Should the Buyer’s technical staff require the on-site assistance of AMETEK’s agents or
employees for service calls covered by this warranty clause, the Buyer shall pay travel time plus actual travel and
living expenses.
THIS WARRANTY IS GIVEN AND ACCEPTED IN LIEU OF ALL OTHER WARRANTIES, WHETHER EXPRESS OR
IMPLIED, INCLUDING WITHOUT LIMITATION AND WARRANTIES OF FITNESS OR OF MERCHANTABILITY
OTHER THAN AS EXPRESSLY SET FORTH HEREIN, AND OF ALL OTHER OBLIGATIONS OR LIABILITIES ON
OUR PART. IN NO EVENT SHALL WE BE LIABLE UNDER THIS WARRANTY OR ANY OTHER PROVISION OF
THIS AGREEMENT FOR ANY ANTICIPATED OR LOST PROFITS, INCIDENTAL DAMAGES, CONSEQUENTIAL
DAMAGES, TIME CHANGES OR ANY OTHER LOSSES INCURRED BY THE ORIGINAL PURCHASER OR
ANY THIRD PARTY IN CONNECTION WITH THE PURCHASE, INSTALLATION, REPAIR OR OPERATION
OF EQUIPMENT, OR ANY PART THEREOF COVERED BY THIS WARRANTY OR OTHERWISE. WE MAKE NO
WARRANTY, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF FITNESS OR
OF MERCHANTABILITY, AS TO ANY OTHER MANUFACTURER’S EQUIPMENT, WHETHER SOLD SEPARATELY
OR IN CONJUNCTION WITH EQUIPMENT OF OUR MANUFACTURE. WE DO NOT AUTHORIZE ANY
REPRESENTATIVE OR OTHER PERSON TO ASSUME FOR US ANY LIABILITY IN CONNECTION WITH
EQUIPMENT, OR ANY PART THEREOF, COVERED BY THIS WARRANTY.

Overview | 1-1
OVERVIEW
This chapter provides an overview of the various sub-systems that make
up the AMETEK analyzer and its sample system, and where to find
supplemental information for optional equipment.

1-2 | Model 920 Multi-Gas Analyzer
About the Analyzer
The analyzer is comprised of (Figure 1-1):
• Two ultraviolet light sources (source lamps)
• Chopper Wheel (Filter Wheel) containing up to six interference filters
• Beam Splitter
• Front-surfaced mirrors
• Gas Measuring Cell (contained within an Oven). A pressure transduc-
er monitors the pressure at the outlet of the Measuring Cell.
• Two matched Photodetectors
Figure 1-1.
Analyzer schematic.