ATI Technologies GasSens A14 User manual

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O&MManual
GasSens
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GasSens Gas Detection SystemSection 1-Overview
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TABLEOFCONTENTS
TABLE OF CONTENTS.................................................................................................................................... 1
INTRODUCTION............................................................................................................................................1-3
A11 SENSOR/TRANSMITTER ............................................................................................................................1-4
A14 RECEIVER MODULE..................................................................................................................................1-4
A17 POWER SUPPLY MODULE.........................................................................................................................1-4
NEMA 4X ENCLOSURES .................................................................................................................................1-4
EXPLOSION-PROOF ENCLOSURES.....................................................................................................................1-4
AUDIBLE HORN ...............................................................................................................................................1-5
STROBE LAMP .................................................................................................................................................1-5
A19 BATTERY BACK-UP..................................................................................................................................1-5
MECHANICALINSTALLATION................................................................................................................1-6
ELECTRICALINSTALLATION................................................................................................................1-11
RECEIVERMODULE ...................................................................................................................................2-1
INTRODUCTION................................................................................................................................................2-1
ELECTRICAL CONNECTION...............................................................................................................................2-1
FACTORY CONFIGURATION..............................................................................................................................2-3
CONFIGURATION SWITCHES.............................................................................................................................2-3
SETPOINT SELECTION.......................................................................................................................................2-5
RANGE SELECTION ..........................................................................................................................................2-6
RELAY CONFIGURATION ..................................................................................................................................2-6
EXTERNAL HORN RELAY.................................................................................................................................2-7
DISPLAY INTENSITY.........................................................................................................................................2-7
OPERATION....................................................................................................................................................2-8
STARTUP..........................................................................................................................................................2-8
ALARM ACKNOWLEDGEAND RESET................................................................................................................2-8
TROUBLE ALARM AND RELAY.........................................................................................................................2-9
AUTO-TEST FUNCTION (OPTIONAL).................................................................................................................2-9
LAMPAND HORN TEST..................................................................................................................................2-10
RELAY INHIBIT...............................................................................................................................................2-10
MANUAL AUTO-TEST ....................................................................................................................................2-11
REMOTE RESET..............................................................................................................................................2-11
ANALOG OUTPUT...........................................................................................................................................2-11
AUTO-TEST REMOTE VERIFICATION..............................................................................................................2-12
DEACTIVATINGTHE AUTO-TEST FUNCTION...................................................................................................2-12
TROUBLESHOOTING.................................................................................................................................2-13
RECEIVERMODULE PARTSLIST...........................................................................................................2-14
A17 UNIVERSALPOWERSUPPLY.............................................................................................................3-1
POWERSUPPLYPARTSLIST.....................................................................................................................3-3
OPTIONALEQUIPMENT..............................................................................................................................4-1
INSTALLATION .................................................................................................................................................4-1
OPERATION......................................................................................................................................................4-2
REMOVALFROM SERVICE................................................................................................................................4-2

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BATTERY BACKUP PARTSLIST...............................................................................................................4-3
STROBEPARTSLIST....................................................................................................................................4-3
STROBELIGHT.............................................................................................................................................4-3

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INTRODUCTION
GasSens isan on-line monitoring systemforthe detection ofhazardousgasesinambient
air.It isdesigned to detectand alarmgasleaksfromstorage cylinders,process piping, orgas
feed equipment invirtuallyanytype ofindustrialplant environment. Systemsareavailablefor
monitoring a varietyofgasesasshown in Table 1-1.
TABLE1-1
GAS CODENO. STD. RANGE MIN. RANGE MAX. RANGE
GENERALGASES
Ammonia 15* 0-100 PPM 0-50 PPM 0-500 PPM
Carbon Monoxide 16* 0-100 PPM 0-50 PPM 0-500 PPM
Hydrogen 18 0-4% 0-2000 PPM 0-10%
NitricOxide 25 0-100 PPM 0-25 PPM 0-500 PPM
Oxygen 19 0-25% 0-10% 0-100%
Phosgene 20 0-2 PPM 0-1 PPM 0-100 PPM
OXIDANTGASES
Bromine 10* 0-2 PPM 0-1 PPM 0-100 PPM
Chlorine 11* 0-10 PPM 0-1 PPM 0-100 PPM
Chlorine Dioxide 12* 0-2 PPM 0-1 PPM 0-100 PPM
Fluorine 13* 0-2 PPM 0-1 PPM 0-100 PPM
Hydrogen Peroxide 34 0-10 PPM 0-10 PPM 0-100 PPM
Ozone 14* 0-2 PPM 0-1 PPM 0-100 PPM
Iodine 35* 0-2 PPM 0-1 PPM 0-100 PPM
ACID GASES
Hydrogen Chloride 21* 0-20 PPM 0-10 PPM 0-200 PPM
Hydrogen Cyanide 22* 0-20 PPM 0-10 PPM 0-200 PPM
Hydrogen Fluoride 23* 0-20 PPM 0-10 PPM 0-200 PPM
Hydrogen Sulfide 24* 0-50 PPM 0-10 PPM 0-500 PPM
Nitrogen Dioxide 26* 0-20 PPM 0-5 PPM 0-200 PPM
SulfurDioxide 27* 0-20 PPM 0-10 PPM 0-200 PPM
HYDRIDEGASES
Arsine 28 0-1000 PPB 0-1000 PPB 0-100 PPM
Diborane 29 0-1000 PPB 0-1000 PPB 0-100 PPM
Germane 30 0-1000 PPB 0-1000 PPB 0-100 PPM
Hydrogen Selenide 31 0-1000 PPB 0-1000 PPB 0-100 PPM
Phosphine 32 0-1000 PPB 0-1000 PPB 0-100 PPM
Silane 33 0-10 PPM 0-1000 PPB 0-100 PPM
*Auto-Test isavailable in these gases.
The GasSens systemconsistsofmodularcomponentsthat can be used inavarietyof
configurationsto fitspecificapplication requirements.Adescription ofthe majorsystem
componentsfollows:

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A11 Sensor/Transmitter
Consistsofan electrochemicalgassensorcloselycoupled to aNEMA4Xtransmitter.This
component measuresgasconcentration and convertsthe measurement to adigitalsignalfor
transmission to areceivermodule. It mustbe mounted inthe area wheregasleakage orbuildup
isexpected, and can eitherbe wall mounted orsupported byelectricalconduitcarrying
interconnecting wiring. Sensor/transmitters areavailablewith optional Auto-Test,an
electrochemicalgasgeneratorwhichautomaticallytestssensorresponsedailyand alarmsany
sensorproblems. Forhazardousareas, explosion-proofsensor/transmitters are available.
A14 ReceiverModule
Receivesdigitaldata fromthe sensor/transmitterand providesan LEDdisplayofgas
concentration, twogasalarm setpoints,three gasalarm relays,an isolated 4-20 mAoutput, and a
troublealarmand relay.The receiverispackaged inacompactDIN rail mount housing, and fits
easilyinto NEMA4Xenclosuressuitableforone, two, three, orsixmodules.Eachmoduleis
switchprogrammableforfull scalerange, alarmsetpoints,relaylatch/non-latchoperation, and
relaynormal/fail-safeoperation. Asingleswitch(marked A/R)on the front panelprovidesalarm
acknowledge and reset functions,and can alsobe used to testfront panelLEDindicators and to
inhibit alarmrelays. LED bars on the front panelprovide visualindication ofalarmstatus.
A17 PowerSupplyModule
Provides12 VDC powerto one ortworeceivermodulespluspowerforan audiblehornand
forcharging an externalbattery.Packaged inthe samecompactDIN rail mount moduleused for
the receiver,the powersupplyisdesigned forusethroughout the world. Input to thismodulemay
be anyAC(50 or60 Hz.)orDC voltage between 85 and 270 volts.The supplyisself-regulating,
meaning no jumperchanges,no changesinswitchsettings,and no variation inwiring pattern. A
powerfailure alarmrelayisincluded in the module to signalthe loss ofinput power.
NEMA4X Enclosures
Fourstandardenclosuresareavailableforhousing receiverand powersupplymodules.
Polystyrene enclosuresaresuitableforoutdoorenvironments,and digitaldisplaysand alarm
indicators areclearlyvisiblethrough aclearpolycarbonate windowon the front. The window
hingesopen to gainaccess to the receiverA/R controlswitch, and the entirefront section ofthe
enclosurecan be removed foreaseofmounting and wiring. Enclosuresareprovided with
knockoutson all foursidesto facilitate wiring, and 1/2"FNPTconduithubsareprovided with each
enclosure.
Explosion-proofEnclosures
Twoversionsareavailableto allowuseofthe receiverand powersupplymodulesin
hazardousareas.One version issuitableforasinglereceivermodule, whilethe second islarge
enough to containboth apowersupplyand areceiver.Enclosuresarerated forClass 1, Division
1, GroupsC&D. Group Benclosuresarealsoavailableifrequired. All explosion-proof
enclosurescan be supplied with an externalacknowledge and reset switch.

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AudibleHorn
A12 VDC piezoelectricalarmhornisavailableformounting into anyofthe NEMA4X
enclosures.The horniswired to the receivermoduleand will sound intermittentlywhen the
warning setpoint isreached, and continuouslywhen the alarmsetpoint isreached. The horncan
be silenced bypushing the A/R switchon the receiverfront panel.Asinglehorncan be wired
through multiple receivers and will sound ifanyreceivergoesinto alarm.
StrobeLamp
Providesabright visualindication ofan alarmcondition. The strobe usesaxenon flash
lampto giveahigh intensityflashapproximately70 timesaminute. The strobe iswired to one of
the alarmrelays,with powerforthe strobe supplied fromthe powersupplymodule. Mounting is
by1/2"MNPTnipple, making it convenient to mount directlyto a NEMAenclosure.
A19 BatteryBack-up
Providesa12 VDC, 4AHbatteryand charging controlcircuitryinaseparate NEMA4X
enclosure. The batterybackup connectsdirectlyto the A17 powersupplymoduleto provide
standbypowerto the detection system.IfACpowerislost, the batteryinsuresthat detection
continuesuninterrupted.
GasSens componentsallowsimpleassemblyofeithersingleormultipoint detection
systems.Eachpoint ofdetection requiresone sensor/transmitterand one receiver.The
sensor/transmitterismounted inthe hazardarea, and the receiverislocated anywherewithin
1000 feet. Ifthe userhasaregulated 12 VDC powersupplyand an enclosureto housethe
receiver,nothing elseisrequired. Ifnot, one powersupplyforeverytworeceivers isneeded for
power,and an enclosureofasizeto containthe modulesisneeded forenvironmentalprotection.
An optionalhorn and strobe maybe added ifdesired.

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MECHANICALINSTALLATION
Systemenclosures,batteryback-up units,and sensortransmitters areall designed for
surfacemounting using screwsorboltsinserted through the recessed mounting holesat each
cornerofthe enclosures.Included with eachsystemenclosureisatemplate with mounting hole
dimensionsfortwoand three modulesystemenclosures,batteryback-up enclosure, and
sensor/transmitterenclosure. The template can be used to markholecenters on wallsor
mounting panels.
Mounting recessesaresuitablefor#6 or#8 machine screwsorwood screws.Screwlength
will varywith specificsite conditions.
Twoand three modulesystemenclosuresprovide knockoutson all foursidesto allowwiring
conduitto be connected in the most convenient way. Enclosuresare shipped with all knockoutsin
placeexcept forthe largerknockout on the bottom,wherethe audiblehornisinstalled ifordered.
See pages1-6through 1-9fordimensionaldrawingsofthe one, two, three and sixmodule
enclosures.
Eachenclosureissupplied with conduithubsforconnection of1/2"NPTthreaded conduit.
Alsoincluded isasealring foreachhub. Seal ringsarerequiredto provideawatertight
conduithub connection to theenclosure. The following liststhe numberofhubsthat should
be included with each enclosure type.
Two module Enclosure -4 hubs
Three module Enclosure -6 hubs
SixModule Enclosures-6 hubs
Batteryback-up Enclosure -2 hubs
Sensor/TransmitterEnclosure -1 hub
Conduithubsareinstalled inanyenclosureknockout labeled PG16. Note that some
knockoutshavemorethan one designation, suchasPG11/16. Thosewith twodesignationswill
haveconcentriccirclesforknockouts.The innercirclemarksthe lowerPGnumberwhilethe
outercirclemarksthe highernumber.Placeathinbladed screwdriverinto the circularslot orthe
desired knockout sizeand tap firmlywith ahammer.Toinstall the hub, placethe sealring over
the threaded partof the hub. Locate the hub nut on the inside of the enclosure and screwthe hub
into the hub nut fromthe outside. Tighten firmlyto insurethat the sealring providesagood seal
between the hub and the outside ofthe enclosure.

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Forinstallationswhereconduitwill not be used, cablegland sealfittingsmustbe installed in
the conduithubs.Plasticcableglandsareavailablefrommostelectricalsupplystores.Gland
sealswith 1/2"NPTthreadswill screwdirectlyinto the conduit hub. Gland sealsare also available
fromATIforinstallation directlyinto the enclosuresinplaceofthe conduithubs.Referto the
partslist forthe correct part numberofthe cable gland seals.
Figure 1-1:Single Module SystemEnclosure Dimensions (80-0005R)

GasSens Gas Detection SystemSection 1-Overview
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THRU HOLES FORSURFACE
MOUNTING (4)#6 SCREWS
SIDEVIEW
FRONTVIEW
BOTTOMVIEW
Figure 1-2:Two Module SystemEnclosure Dimensions (80-0006R)

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THRU HOLES FORSURFACE
MOUNTING(4) #6 SCREWS
SIDE VIEW
FRONTVIEW
BOTTOMVIEW
Figure 1-3:Three Module SystemEnclosure Dimensions (80-0007R)

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Figure 1-4:Six Module SystemEnclosure Dimensions (80-0008R)

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ELECTRICALINSTALLATION
Fieldwiring required foradetection systemincludesconnection ofACpower,connection of
twoconductorcablebetween the receiverand the sensor/transmitter,and connection ofthe
batteryback-up unitifitwaspurchased with the system.ATIdoesnot supplyan ACpowercord
with the system.A25 foot length of2conductorinterconnectcableissupplied forconnection of
the sensor/transmitterto the receiver.Longerlengthsup to 1000 feet maybe used when
required.
Singlepoint detection systemsaresupplied with the powersupply,receiver,and optionalhorn
factorywired asshown in Figure 1-5 below.
AnalyticalTechnology,Inc.
Figure 1-5:Single Point ReceiverInternal Wiring (ATI-032)
Figure2-2insection 2ofthismanualshowsadetailed terminalwiring drawing forthe
Receivermodule. Figure3-1insection 3showsadetailed terminalwiring drawing forthe power
supplymodule.
A GasSens gasdetection systemwill alwayscontainan A14 Receiverand an A11 Sensor/
transmitter.Normally,an A17 PowerSupplymodulewill alsobe included, and an A19 Battery
Back-up Unitwill often be used to provide standbypowerforthe system.Figures1-8and 1-9
provide interconnect wiring diagramsfortypicalsingle channelsystems.

GasSens Gas Detection SystemSection 1-Overview
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Twopoint detectors include one powersupplyand tworeceivers.Thesesystemsareshipped
factorywired asshown in Figure 1-6 below.
AnalyticalTechnology, Inc.
Figure 1-6:Dual Point ReceiverInternal Wiring, (ATI-033)

GasSens Gas Detection SystemSection 1-Overview
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Analytical Technology, Inc.
Analytical Technology, Inc.
Figure 1-7:FourPoint ReceiverInternal Wiring (ATI-075)

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Multipoint systemssupplied in“Large”type enclosuresusea65 watt powersupplylocated in
the top ofthe enclosure. Thispowersupplyisdesigned to powerup to 12 ofthe A14 receiver
modules. Figure 1-8 showstypicalwiring forthistype ofsystem.
Figure 1-8:65WPowerSupply to A11 Wiring Diagram(ATI-0544)

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Sensor/transmitters containtwo2-position terminalblocks,one forreceiverconnection and one
forconnection ofthe Auto-Testgenerator.Connection ofthe twowiresfromthe receiverarenot
polaritysensitive. Thesewirescan be hooked up without regardto terminalposition.
Connection of thegeneratoris polaritysensitive. The generatorwill not function unless
connected properly.Sensor/transmitters supplied with the generatorfromthe factorywill be
factorywired. Adding ageneratorto an existing unitrequiresthe installerto be surethat
generatorwiring followsthe diagramin Figure 1-8 below.
AnalyticalTechnology,Inc.
Figure 1-9:Typical SystemWiring, Nema-4 TransmitterVersion (ATI-034)
CAUTION:Be verycarefulwhenremoving theknockoutson thesensor/transmitter
enclosure. Asmall bladedscrewdrivertappedfirmlyintheknockout recess is
all thatis necessary.Donot drivethescrewdriverbladeinto thetransmitter
enclosure oritmaystrike the circuitboardand cause component damage.

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AnalyticalTechnology, Inc.
Figure 1-10:Typical SystemWiring, Explosion-proof TransmitterVersion (ATI-076)
The remainderofthismanualisdivided into sectionsthat describe eachcomponent ofthe
system.Mechanicaland electricalinstallation arethe onlyrequirementsto provide aworkable
system.Powersupplymodulesand batteryback-up unitsrequireno adjustments.Receiver
modulesarefactoryset to the range specified on the order,and alarmsetpointswill be set to
defaultvaluesunless otherwisespecified on the order.Sensor/transmitters arefactorycalibrated,
and shouldrequireno adjustmentswhen placed inservice. Calibration can be checked ifdesired
according to the instructionsin the Sensor/transmittersection ofthismanual.
Normaloperation ofthe systemisdone using the switchon the Receivermodule. The
"Operation"portion ofthe Receiversection (section 2)shouldbe read and understood before
placing the detection systeminto operation.

GasSens Gas Detection SystemSection 2-A14 ReceiverModule
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RECEIVER MODULE
Introduction
SeriesA14 Receivers provide the userinterface to the gasdetection system. Each receiveris
connected to aseriesA11 sensor/transmitterwith a2conductorcable, and displaysinformation
on the gasconcentration in the sensorarea. Receivers are powered bya separate 12 VDC power
supply(partno. 00-0055)supplied aspartofthe system,orbyapowersupplyfurnished bythe
user(12 VDC only).
PUSHBUTTONFORALARM
ACKNOWLEDGMENT AND RESET
4DIGITLEDDISPLAY -INDICATES GAS
CONCENTRATION
AMBER&REDLEDS-“WARNING”
AND“ALARM”BARINDICATORS
REDLED-“TROUBLE” BARINDICATOR,
INDICATESLOSSOF TRANSMITTERINPUT
AND CERTAINOTHERSYSTEM PROBLEMS
GREENLED-“POWERON”BARINDICATOR
WITHGAS SYMBOLDESIGNATION,
ENGINEERINGUNITS(PPM,PPB, %OR%LEL)
Figure 2-1:Front Panel Controls & LEDs (0109PM)
Receivermodulesalso include the following standard features:
1. Three SPDTalarmrelays, switch programmable foroperating configuration.
2. One SPDTtrouble relay, forremotelyindicating that the TROUBLEalarmisactivated.
3. Isolated 4-20 mAoutput signalproportionalto gasconcentration.
4. Isolated remote reset input terminalsforremote alarmacknowledgment.
5. Powerforoperation ofan A11 sensor/transmitterlocated up to 1000 feet away.
Receivers arehoused inacompactnorylcasedesigned formounting to a35 x7.5 mm DIN
rail.The railsaresupplied instandardATIsystemenclosures,orcan be supplied byasystem
integratoraspartofacustompanelarrangement. Aspring clipon the backofthe enclosure
holdsthe moduleto the rail.Toremovefromarail,slide athinbladed screwdriverthrough the
blackloop at the top ofthe moduleand pull outwarduntil the modulereleasesfromthe rail.To
mount to the rail,reversethe procedure. When mounting, slide the bottom ofthe moduleagainst
the bottomofthe rail before extending the spring clip.
Electrical Connection
Electricalconnectionsto the receiveraremade to twopluggableterminalblocksasshownin
Figure2-2. Transmitterconnectionsmustbe made at the timeofinstallation, whilepowerand
hornconnectionsarefactorywired when the receiverispartofacomplete system.Connections
shouldbe made and checked beforepowerisapplied to the module. Neverconnectoralter
connectionswhile powerison.

GasSens Gas Detection SystemSection 2-A14 ReceiverModule
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A1A2A3 TROUBLE
TB2
TB1
TB1 TB2
1: +12 Module Powerpositive (12 VDC) 1: A1 NOAlarm1 normallyopen contact
2: C Module PowerCommon 2: A1 C Alarm1 common
3: Earth Ground (REQUIRED) 3: A1 NC Alarm1 normallyclosed contact
4: H+Audible Horn positive 4: A2 NOAlarm2 normallyopen contact
5: H-Audible Horn negative 5: A2 C Alarm2 common
6: RR Remote Reset 6: A2 NC Alarm2 normallyclosed contact
7: RR Remote Reset 7: A3 NOAlarm3 normallyopen contact
8: MA+ 4-20 mAoutput positive 8: A3 C Alarm3 common
9: MA-4-20 ma output negative 9: A3 NC Alarm3 normallyclosed contact
10: Earth Ground 10: TROUBLENC trouble normallyclosed contact
11: TR TransmitterInput 11: TROUBLEC Trouble common
12: TR TransmitterInput 12: TROUBLENOTrouble normallyopen contact
NOTE:Relaycontactdesignation isshownforrelaysinnormalmode ofoperation forrelaysA1,
A2and A3. Iffail-saferelayoperation isselected, NOand NC designationsarereversed
forthat relay.The TROUBLErelayisset to fail-safeoperation at the factory,and the
designation shown above isforthe trouble relayin fail-safe mode.
Figure 2-2:ReceiverModule Terminals (ATI-029)
CAUTION:Receivermodules MUSTbeconnectedto a secure earth ground. Terminal 3 of
TB1 inFigure2-2abovemustbeconnectedto theearth ground terminal of
ATI'spowersupplymodule as shownintheconnection diagraminFigure1-3.
Iftheuseris providing another12 VDC supply,besurethatthereceiveris
properlygrounded.

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FactoryConfiguration
All receivers areidenticalexcept forthe gassymbolattached to the green powerLED.
Operating range, alarmrelayconfiguration, displayintensity,and Auto-Testactivation are
selectableusing 4banksofDIPswitcheslocated on the configuration circuitboardinside the
module.
Receivers arefactoryconfigured forthe operating range specified on the customerorder.If
the systemisordered with the Auto-Testoption, thisisalsofactoryconfigured. Factory
configuration ofthe relaysisasfollows:
Relay1 -Configured to trip at the Warning setpoint and set fornormal, non-latching operation.
Relay2 -Configured to trip at the Alarmsetpoint and set fornormal, latching operation.
Relay3 -Configured to trip at the Alarmsetpoint and set fornormal, latching operation.
AlarmDelay-Configured for2 second delay.
Warning and Alarmsetpointsarefactoryset to standardvaluesdepending on the operating
range. Except foroxygen systems,alarmsareset to activate abovethe setpoints.Oxygen
alarmsare set to activate belowthe setpoints.
The LEDdisplaywill operate ineithernormalorhigh intensitymode. Normalmode isthe
factorydefaultsetting, and isused when receivers arelocated indoors orinshaded areas.High
intensitymode isselected when receivers will be mounted outdoors.In high intensitymode, the
LED displaycan be read in direct sunlight.
Configuration Switches
Figure2-3indicatesthe location of eachbankof DIPswitcheson the configuration P.C. board
and Figure 2-4 providesa description ofthe function ofeach switch on each bank.
BANKA
BANKB
BANKC
BANKD
Figure 2-3:Configuration BoardSwitchLocation