ATI Technologies GasSens User manual

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O&MManual
GasSens
Bromine GasMonitor
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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)

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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)