SSiimmuullttaanneeoouuss dduuaall rraannggee ddeetteeccttiioonn ((00 ttoo 55000000 ppppmm••mmeetteerr aanndd 00 ttoo 55 LLEELL••mmeetteerr))

AAuuttooTTRRAACCKK aalliiggnnmmeenntt aalllloowwss ffoorr eeaassyy iinnssttaallllaattiioonn

DDiiggiittaall ddiissppllaayy pprroovviiddeess ccoonnttiinnuuoouuss rreeaaddoouutt ooff ggaass ccoonncceennttrraattiioonn aannddffaauulltt ccooddeess

FFaauulltt ddiiaaggnnoossttiiccss mmoonniittoorr nniinnee ddiiffffeerreenntt ppootteennttiiaall pprroobblleemmss

MMuullttiippllee oouuttppuuttss::**00 ttoo 55000000 ppppmm••mmeetteerr :: 44--2200 mmAA,,

((11)) SSPPDDTT rreellaayy00 ttoo 55 LLEELL••mmeetteerr :: 44--2200 mmAA,,

((22)) SSPPDDTT rreellaayyssFFaauulltt :: ((11)) SSPPDDTT rreellaayy

** FFoorr hheeaavvyy hhyyddrrooccaarrbboonn ((pprrooppaannee)) uunniitt tthhee rraannggeess aarree00 ttoo 22000000 ppppmm••mmeetteerr aanndd 00 ttoo 11 LLEELL••mmeetteerr

SSiinnggllee ddeetteeccttiioonn bbeeaamm tteecchhnnoollooggyy wwhhiicchh eelliimmiinnaatteessddrriifftt aanndd ffaallssee aallaarrmmss

AAuuttoo zzeerroo ffeeaattuurree zzeerrooss bbaacckkggrroouunndd wwiitthh nnoo aaddjjuussttmmeennttss

NNoo ffiieelldd ccaalliibbrraattiioonn rreeqquuiirreedd

CCoonnttiinnuuoouuss ooppttiiccaall cchheecckk ffoorr bbeeaamm bblloocckkaaggee aanndd aauuttoommaattiicc ggaaiinn ssiiggnnaallrreedduuccttiioonn

OOppeenn ppaatthh ggaass ddeetteeccttiioonn ccoommpplleemmeennttss ppooiinntt ddeetteeccttiioonn aanndd ccaann bbee uusseedd aass aa ccoommppoonneenntt iinn aa ttoottaall ssyysstteemm ssoolluuttiioonn..

TThhee MMooddeell IIRR55000000 ccaann bbee uusseedd iinn aapppplliiccaattiioonnss wwhheerree aassiinnggllee mmoonniittoorr ccaann ccoovveerr aa lliinnee ooff sseevveerraall ppootteennttiiaall lleeaakkssoouurrcceess.. FFoorr eexxaammppllee,, aa rrooww ooff vvaallvveess oorr ppuummppss.. TThhee MMooddeellIIRR55000000 ccaann aallssoo bbee uusseedd ffoorr ppeerriimmeetteerr mmoonniittoorriinngg wwhhiicchh aassssuurreessggrreeaatteerr ccoovveerraaggee oovveerr wwiiddeerr aarreeaass tthhaann ppooiinntt ddeetteeccttiioonn.. FFoorreexxaammppllee,, ffeennccee lliinnee mmoonniittoorriinngg,, ttaannkk ffaarrmmss,, ggaass sspphheerreess oorrpprroocceessss aarreeaass ooff rreeffiinneerriieess..

OOtthheerr aapppplliiccaattiioonnss ffoorr tthhee MMooddeell IIRR55000000 iinncclluuddee oonneess wwhhiicchhaarree eennvviirroonnmmeennttaallllyy uunnffrriieennddllyy ttoo ppooiinntt ggaass ddeetteeccttiioonn.. PPooiissoonnss,,wwaatteerr sspprraayy,, aanndd eexxttrreemmee tteemmppeerraattuurreess aarree ttyyppiiccaall pprroobblleemmsswwhheerree ooppeenn ppaatthh ggaass ddeetteeccttiioonn ccaann bbee uusseedd..

FEATURES A

SPECIF ICAT IONS ASSYYSSTTEEMMSensor Type: Infrared absorptionRanges: “Light Hydrocarbon Methane” unit

0 to 5000 ppm•meter and 0 to 5 LEL•meter

Path Length: 5 to 100 m (16 to 328 ft), 130 m (427 ft.) optional

Response Time: T50 ≤ 4.5 seconds and T90 ≤ 8 seconds

when exposed to full scale gas concentration

in ppm range

Repeatability: ± 10% of last reading for each scale

Linearity: ± 10% over full scale for each scale

Calibration: No traditional calibration required

Field background zero adjustment provided

Warranty: Two years

Modes: Test gas, setup, alignment

Optional: “Heavy Hydrocarbon Propane” unit0 to 2000 ppm•meter and 0 to 1 LEL•meter detection ranges

MMEECCHHAANNIICCAALLHousing Size:

Source: 6.4” Dia x 12.0” Length

(163mm Dia x 305mm Length)

Receiver: 5.4” Dia x 16.7” Length

(137mm Dia x 424mm Length)

Enclosure Material: Copper-free Aluminum or 316 Stainless Steel

Weight:Source: 10 lbs (5 Kg) Aluminum

28 lbs (12.7 Kg) Stainless Steel

Receiver: 9 lbs (4.1 Kg) Aluminum

25 lbs (11.3 Kg) Stainless Steel

Mount: 11 lbs (5.0 Kg) Stainless Steel only

Conduit Entries: (2) Aluminum: 3/4 NPT

Stainless Steel: M20 x 1.5-6H

EENNVVIIRROONNMMEENNTTAALLOperating Temperature: -40°F to +140°F (-40°C to +60°C)Operating Humidity: 0 to 95% RH (Non-condensing)Vibration: Per ISA/CSA C22.2 No 152 and BS2011

Part 2.1 standardsWeatherproof rating: Type 4X, IP66Certification: Class 1, Div. 1, Groups C & D / EExd IIB T4

CSA-CUS, ATEX & GOSTAccessories: Test gas filters

Mounting arm

EELLEECCTTRRIICCAALLOperating Voltage: 24 VDC nominal, 20-32 VDC range

Power Consumption:

Source: 24 VDC @ 1.25 amp (Maximum)

Receiver: 24 VDC @ 1.05 amp (Maximum)

Outputs: Two (2) analog signals and four

(4) SPDT relays

Analog Signals: 600 ohm load max.

0-5000 ppm•meter 0-5 LEL•meter0 mA Malfunction Malfunction1.5 mA Beam Block Beam Block

or test gas or test gas 4-20 mA 0 - 5000 ppm•meter 0 - 5 LEL•meter20-22 mA Overrange Overrange

Relays:

Four (4) SPDT 5 amp @ 30 VDC res. max; 250 VAC;

ppm Alarm; LEL Warning; LEL Alarm and Fault

Software Selectable:Latching/Non-Latching Warning and Alarm

Energized/De-Energized Warning and Alarm

Warning & Alarm level set-points

Digital Display:

Two digit, seven segment (auto range change)

LED indication of scale displayed

Fault Codes:

F1 - Close to minimum signal level

F2 - Timing error

F3 - Low IR energy

F4 - High IR energy

F5 - Large sudden change (blockage) 30 second Fault delay

F6 - Low voltage

F7 - Internal system failure

F8 - Failed to zero/Excessive negative drift due tobackground gas changes

F9 - Open current loop(s)

Standard Configuration: IR5000-2-1-1-01-01-0

De-energized relays, 20-100 meters,

aluminum housing, C5A

APPL ICAT IONS A

Lake Forest, CA26776 Simpatica CircleLake Forest, California92630U.S.A.Tel: + 1-949-581-4464FAX: + 1-949-581-1151

Houston, Texas9776 Whithorn DriveHouston, Texas77095U.S.A.Tel: + 1-281-855-6000FAX: + 1-281-855-3290

Galway, IrelandBallybrit Business ParkGalwayRepublic of IrelandTel: + 353 91 751175FAX: + 353 91 751317

SingaporeNo. 2 Kallang Pudding#09-16 Mactech BuildingSingapore 349307Tel: + 65 6748 3488FAX: + 65 6748 1911

Middle EastP.O. Box 61209Jebel AliDubaiUnited Arab EmiratesTel: + 971 4 8815751FAX: + 971 4 8817927

United KingdomHeather CloseLyme Green Business ParkMacclesfield, CheshireUnited Kingdom, SK11 OLRTel: + 44 1625 619583FAX: + 44 1625 619098

FB-IR5000-H1206

Specifications subject to change without notice.

Represented by:

Visit our Web Site at: http://www.generalmonitors.com

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■ E a s yt ro u b l e s h o o t i n g

■ Va r i o u s a l a r mo p t i o n s

■ Lo w m a i n t e n a n c e

■ E a s y i n s t a l l a t i o n

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I R 5 0 0 0OPEN PATH HYDROCARBON

GAS MONITORING SYSTEM

Email: info@generalmonitors.com

by temporary interruption of the detection beam such aspeople or vehicles.

Although the Model IR5000 does not need to be fieldcalibrated, an AutoZERO feature is provided to allow theoperator to zero the instrument with no traditional zero &span adjustments.

The mechanical packaging of the Model IR5000 sourceand receiver units utilize a stand alone, unitized designand are available in aluminum or 316 stainless steelhousings. Integral housing mounts provide alignmentlatitude for each source and receiver during installation.

Accessories for the Model IR5000 include test gasfilters for system performance checkout and mountingarms for the source and receiver units. ■

effected by air currents. Even a mild wind (3-4 mph) cansignificantly change the shape of a cloud.

Typically, light gases like methane do not diffuse symmetrically buthave a tendency instead to spread vertically rather than in a horizontaldirection. Heavy gases tend to build up into a cloud, even in a calmwind. As wind increases in intensity, gas clouds will dissipate faster. This indicates that in outdoor environments, gas leaks can have very

low gas concentrations. The General Monitors Model IR5000 caneffectively detect gas leaks with its high sensitivity and operate as a

hazardous situation monitor for higher gas concentrations. ■

One of the main advantages of the Model IR5000 is its simultaneous dual range detection of hydrocarbon leaks reachinglow warning levels and catastrophic hydrocarbon leaks reachinghazardous levels.

The Model IR5000’s digital display incorporates an AutoRANGINGdesign which displays the 0 to 5000 ppm•meter scale for methaneuntil the gas concentration exceeds 5000 ppm•meter. Once theupper limit has been exceeded, the display scale automaticallyswitches to the 0 to 5 LEL•meter measurement scale, (for methane).

Another advantage of the Model IR5000 is the AutoTRACKalignment which simplifies initial set-up and installation. By using thedigital display as a position indicator, alignment is made easy. Toalign the source and receiver, the operator simply monitors thedigital display for alignment cues which will direct the receiver to properalignment with the source. The digital display will then prompt theoperator when the unit is properly aligned. No additional tools orequipment are required for set-up and the housing remains closed.

The Model IR5000 provides multiple outputs for interface in a varietyof applications. Alarm outputs include two 4-20mA signals and four

IR5000 OPEN PATH HYDROCARBON GAS MONITORING SYSTEM A

5 0 0 0IR GAS D ISPERSION A

SENSOR TECHNOLOGY A

Gas leaks can either form arelatively stationary cloud or readilydissipate depending upon severalfactors such as wind, rate of leak,and weight of the leaked gascompared to air, to name just a fewenvironmental factors.

If a gas leak creates a cloud, itwill generally have the followingcharacteristics although there is notypical gas cloud. First, the highestgas concentration of a cloud is atthe source and it decreases inconcentration towards the edges.Secondly, the gas cloud shape iselongated or has an irregular pattern

The Model IR5000 is composedof an infrared source unit and amicroprocessor-based infrareddetector receiver module. ThisOpen Path Gas Monitoring Systemmeasures only infrared activegases, such as hydrocarbons, andthe corresponding output of thesystem is expressed in equivalentparts-per-million in a path lengthof one meter (ppm•meter) andequivalent lower-explosive-levelin a path length of one meter(LEL•meter), simultaneously.

The Model IR5000 utilizes asingle beam, single source andsingle detector design to monitorgas concentrations. This technologyprovides improved accuracy, reduc-

Open path IR gas detection is an effective means of measuringhydrocarbon gases using an infrared(IR) detection method based onabsorption of IR radiation (3 to 4micron range) as it passes througha volume of gas.

With an open path system, thereis no definite fixed path length sothe measurement is expressed asa product of the average gasconcentration and the gas cloudwidth passing through the infraredpath length. This means that asmall dense cloud of hydrocarbongas could give the same outputsignal as a large dispersed cloudif the product of the concentration

of the leak and the path length were the same. It is as thoughthe system “counts” the number of hydrocarbon molecules in

the path that absorb infrared radiation in a specific wavelength band.The gas concentration measured by the Model IR5000 is an

average measurement over the path length which includes gas. Theoutput is expressed in ppm•meter (highly sensitive range) orLEL•meter (hazardous range).

Typical readings of methane (100% LEL methane in one meter= 50,000 ppm•meter = 1 LEL•meter) using the Model IR5000 openpath gas detector which has two ranges are as follows:

Open path gas detection is recommended for large open areas orinaccessible locations where point monitoring can be consideredimpractical. It offers another solution to gas detection challenges,and should be used in combination with point gas detection dueto its limitations in targeting specific locations of leaks. ■

G A S C L O U D C A L C U L A T I O NCCoonncceennttrraatt iioonnCCoonncceennttrraatt iioonn LLeennggtthhLLeennggtthh CCoonncceennttrraatt iioonn xx LLeennggtthh==CCoonncceennttrraatt iioonn xx LLeennggtthh== MMee aa ss uurrMM ee aass uu rr eemmeenntteemmeenntt

50 ppm 2 meters 50 x 2 = 100 ppm•meter10 ppm 10 meters 10 x 10 = 100 ppm•meter100 ppm 20 meters 100 x 20 = 2000 ppm•meter

10 % LEL 2 meters .10 x 2 = .2 LEL•meter25% LEL 4 meters .25 x 4 = 1 LEL•meter100% LEL 1 meter 1 x 1 = 1 LEL•meter

tion of sensor drift and improvedimmunity to false alarms.

The Model IR5000 sourceprojects an infrared beam between5 and 100 meters through thehazardous area being monitoredto the IR5000 receiver. As the IRbeam reaches the receiver, it passesthrough a focusing lens and thenalternately passes through twonarrow band IR filters. One IR filteris the active wavelength and thesecond IR filter is the referencewavelength. The IR5000 detectorcomputes the ratio between theactive and reference signals toprovide an output that is propor-tional to the gas concentration inthe beam path.

5 0 0 0IR

O P E N P A T H H Y D R O C A R B O N G A S M O N I T O R I N G S Y S T E M

SPDT relays for warning, alarms andfault. Most options of the ModelIR5000 including the relay optionsfor alarm states and alarm setpoints are software selectable.

The Model IR5000 incorporatesfail-to-safe design and micro-processor technology for advancedperformance features and faultdiagnostics. Included in the faultdiagnostics is a continuous opticalpath check and fault alarms willoccur if the optics are dirty (anautomatic gain control willadjust for loss of signal due todirty optics) or if the IR signal isweak or blocked or if an instru-ment malfunction occurs. Toprevent nuisance faults, a 30second time delay is incorporatedto prevent fault activation caused

N o W i n d 3 t o 4 M P H W i n d

I R 5 0 0 0 O p e n P a t h S y s t e m

D i g i t a l D i s p l a y

by temporary interruption of the detection beam such aspeople or vehicles.

Although the Model IR5000 does not need to be fieldcalibrated, an AutoZERO feature is provided to allow theoperator to zero the instrument with no traditional zero &span adjustments.

The mechanical packaging of the Model IR5000 sourceand receiver units utilize a stand alone, unitized designand are available in aluminum or 316 stainless steelhousings. Integral housing mounts provide alignmentlatitude for each source and receiver during installation.

Accessories for the Model IR5000 include test gasfilters for system performance checkout and mountingarms for the source and receiver units. ■

effected by air currents. Even a mild wind (3-4 mph) cansignificantly change the shape of a cloud.

Typically, light gases like methane do not diffuse symmetrically buthave a tendency instead to spread vertically rather than in a horizontaldirection. Heavy gases tend to build up into a cloud, even in a calmwind. As wind increases in intensity, gas clouds will dissipate faster. This indicates that in outdoor environments, gas leaks can have very

low gas concentrations. The General Monitors Model IR5000 caneffectively detect gas leaks with its high sensitivity and operate as a

hazardous situation monitor for higher gas concentrations. ■

One of the main advantages of the Model IR5000 is its simultaneous dual range detection of hydrocarbon leaks reachinglow warning levels and catastrophic hydrocarbon leaks reachinghazardous levels.

The Model IR5000’s digital display incorporates an AutoRANGINGdesign which displays the 0 to 5000 ppm•meter scale for methaneuntil the gas concentration exceeds 5000 ppm•meter. Once theupper limit has been exceeded, the display scale automaticallyswitches to the 0 to 5 LEL•meter measurement scale, (for methane).

Another advantage of the Model IR5000 is the AutoTRACKalignment which simplifies initial set-up and installation. By using thedigital display as a position indicator, alignment is made easy. Toalign the source and receiver, the operator simply monitors thedigital display for alignment cues which will direct the receiver to properalignment with the source. The digital display will then prompt theoperator when the unit is properly aligned. No additional tools orequipment are required for set-up and the housing remains closed.

The Model IR5000 provides multiple outputs for interface in a varietyof applications. Alarm outputs include two 4-20mA signals and four

IR5000 OPEN PATH HYDROCARBON GAS MONITORING SYSTEM A

5 0 0 0IR GAS D ISPERSION A

SENSOR TECHNOLOGY A

Gas leaks can either form arelatively stationary cloud or readilydissipate depending upon severalfactors such as wind, rate of leak,and weight of the leaked gascompared to air, to name just a fewenvironmental factors.

If a gas leak creates a cloud, itwill generally have the followingcharacteristics although there is notypical gas cloud. First, the highestgas concentration of a cloud is atthe source and it decreases inconcentration towards the edges.Secondly, the gas cloud shape iselongated or has an irregular pattern

The Model IR5000 is composedof an infrared source unit and amicroprocessor-based infrareddetector receiver module. ThisOpen Path Gas Monitoring Systemmeasures only infrared activegases, such as hydrocarbons, andthe corresponding output of thesystem is expressed in equivalentparts-per-million in a path lengthof one meter (ppm•meter) andequivalent lower-explosive-levelin a path length of one meter(LEL•meter), simultaneously.

The Model IR5000 utilizes asingle beam, single source andsingle detector design to monitorgas concentrations. This technologyprovides improved accuracy, reduc-

Open path IR gas detection is an effective means of measuringhydrocarbon gases using an infrared(IR) detection method based onabsorption of IR radiation (3 to 4micron range) as it passes througha volume of gas.

With an open path system, thereis no definite fixed path length sothe measurement is expressed asa product of the average gasconcentration and the gas cloudwidth passing through the infraredpath length. This means that asmall dense cloud of hydrocarbongas could give the same outputsignal as a large dispersed cloudif the product of the concentration

of the leak and the path length were the same. It is as thoughthe system “counts” the number of hydrocarbon molecules in

the path that absorb infrared radiation in a specific wavelength band.The gas concentration measured by the Model IR5000 is an

average measurement over the path length which includes gas. Theoutput is expressed in ppm•meter (highly sensitive range) orLEL•meter (hazardous range).

Typical readings of methane (100% LEL methane in one meter= 50,000 ppm•meter = 1 LEL•meter) using the Model IR5000 openpath gas detector which has two ranges are as follows:

Open path gas detection is recommended for large open areas orinaccessible locations where point monitoring can be consideredimpractical. It offers another solution to gas detection challenges,and should be used in combination with point gas detection dueto its limitations in targeting specific locations of leaks. ■

G A S C L O U D C A L C U L A T I O NCCoonncceennttrraatt iioonnCCoonncceennttrraatt iioonn LLeennggtthhLLeennggtthh CCoonncceennttrraatt iioonn xx LLeennggtthh==CCoonncceennttrraatt iioonn xx LLeennggtthh== MMee aa ss uurrMM ee aass uu rr eemmeenntteemmeenntt

50 ppm 2 meters 50 x 2 = 100 ppm•meter10 ppm 10 meters 10 x 10 = 100 ppm•meter100 ppm 20 meters 100 x 20 = 2000 ppm•meter

10 % LEL 2 meters .10 x 2 = .2 LEL•meter25% LEL 4 meters .25 x 4 = 1 LEL•meter100% LEL 1 meter 1 x 1 = 1 LEL•meter

tion of sensor drift and improvedimmunity to false alarms.

The Model IR5000 sourceprojects an infrared beam between5 and 100 meters through thehazardous area being monitoredto the IR5000 receiver. As the IRbeam reaches the receiver, it passesthrough a focusing lens and thenalternately passes through twonarrow band IR filters. One IR filteris the active wavelength and thesecond IR filter is the referencewavelength. The IR5000 detectorcomputes the ratio between theactive and reference signals toprovide an output that is propor-tional to the gas concentration inthe beam path.

5 0 0 0IR

O P E N P A T H H Y D R O C A R B O N G A S M O N I T O R I N G S Y S T E M

SPDT relays for warning, alarms andfault. Most options of the ModelIR5000 including the relay optionsfor alarm states and alarm setpoints are software selectable.

The Model IR5000 incorporatesfail-to-safe design and micro-processor technology for advancedperformance features and faultdiagnostics. Included in the faultdiagnostics is a continuous opticalpath check and fault alarms willoccur if the optics are dirty (anautomatic gain control willadjust for loss of signal due todirty optics) or if the IR signal isweak or blocked or if an instru-ment malfunction occurs. Toprevent nuisance faults, a 30second time delay is incorporatedto prevent fault activation caused

N o W i n d 3 t o 4 M P H W i n d

I R 5 0 0 0 O p e n P a t h S y s t e m

D i g i t a l D i s p l a y

by temporary interruption of the detection beam such aspeople or vehicles.

Although the Model IR5000 does not need to be fieldcalibrated, an AutoZERO feature is provided to allow theoperator to zero the instrument with no traditional zero &span adjustments.

The mechanical packaging of the Model IR5000 sourceand receiver units utilize a stand alone, unitized designand are available in aluminum or 316 stainless steelhousings. Integral housing mounts provide alignmentlatitude for each source and receiver during installation.

Accessories for the Model IR5000 include test gasfilters for system performance checkout and mountingarms for the source and receiver units. ■

effected by air currents. Even a mild wind (3-4 mph) cansignificantly change the shape of a cloud.

Typically, light gases like methane do not diffuse symmetrically buthave a tendency instead to spread vertically rather than in a horizontaldirection. Heavy gases tend to build up into a cloud, even in a calmwind. As wind increases in intensity, gas clouds will dissipate faster. This indicates that in outdoor environments, gas leaks can have very

low gas concentrations. The General Monitors Model IR5000 caneffectively detect gas leaks with its high sensitivity and operate as a

hazardous situation monitor for higher gas concentrations. ■

One of the main advantages of the Model IR5000 is its simultaneous dual range detection of hydrocarbon leaks reachinglow warning levels and catastrophic hydrocarbon leaks reachinghazardous levels.

The Model IR5000’s digital display incorporates an AutoRANGINGdesign which displays the 0 to 5000 ppm•meter scale for methaneuntil the gas concentration exceeds 5000 ppm•meter. Once theupper limit has been exceeded, the display scale automaticallyswitches to the 0 to 5 LEL•meter measurement scale, (for methane).

Another advantage of the Model IR5000 is the AutoTRACKalignment which simplifies initial set-up and installation. By using thedigital display as a position indicator, alignment is made easy. Toalign the source and receiver, the operator simply monitors thedigital display for alignment cues which will direct the receiver to properalignment with the source. The digital display will then prompt theoperator when the unit is properly aligned. No additional tools orequipment are required for set-up and the housing remains closed.

The Model IR5000 provides multiple outputs for interface in a varietyof applications. Alarm outputs include two 4-20mA signals and four

IR5000 OPEN PATH HYDROCARBON GAS MONITORING SYSTEM A

5 0 0 0IR GAS D ISPERSION A

SENSOR TECHNOLOGY A

Gas leaks can either form arelatively stationary cloud or readilydissipate depending upon severalfactors such as wind, rate of leak,and weight of the leaked gascompared to air, to name just a fewenvironmental factors.

If a gas leak creates a cloud, itwill generally have the followingcharacteristics although there is notypical gas cloud. First, the highestgas concentration of a cloud is atthe source and it decreases inconcentration towards the edges.Secondly, the gas cloud shape iselongated or has an irregular pattern

The Model IR5000 is composedof an infrared source unit and amicroprocessor-based infrareddetector receiver module. ThisOpen Path Gas Monitoring Systemmeasures only infrared activegases, such as hydrocarbons, andthe corresponding output of thesystem is expressed in equivalentparts-per-million in a path lengthof one meter (ppm•meter) andequivalent lower-explosive-levelin a path length of one meter(LEL•meter), simultaneously.

The Model IR5000 utilizes asingle beam, single source andsingle detector design to monitorgas concentrations. This technologyprovides improved accuracy, reduc-

Open path IR gas detection is an effective means of measuringhydrocarbon gases using an infrared(IR) detection method based onabsorption of IR radiation (3 to 4micron range) as it passes througha volume of gas.

With an open path system, thereis no definite fixed path length sothe measurement is expressed asa product of the average gasconcentration and the gas cloudwidth passing through the infraredpath length. This means that asmall dense cloud of hydrocarbongas could give the same outputsignal as a large dispersed cloudif the product of the concentration

of the leak and the path length were the same. It is as thoughthe system “counts” the number of hydrocarbon molecules in

the path that absorb infrared radiation in a specific wavelength band.The gas concentration measured by the Model IR5000 is an

average measurement over the path length which includes gas. Theoutput is expressed in ppm•meter (highly sensitive range) orLEL•meter (hazardous range).

Typical readings of methane (100% LEL methane in one meter= 50,000 ppm•meter = 1 LEL•meter) using the Model IR5000 openpath gas detector which has two ranges are as follows:

Open path gas detection is recommended for large open areas orinaccessible locations where point monitoring can be consideredimpractical. It offers another solution to gas detection challenges,and should be used in combination with point gas detection dueto its limitations in targeting specific locations of leaks. ■

G A S C L O U D C A L C U L A T I O NCCoonncceennttrraatt iioonnCCoonncceennttrraatt iioonn LLeennggtthhLLeennggtthh CCoonncceennttrraatt iioonn xx LLeennggtthh==CCoonncceennttrraatt iioonn xx LLeennggtthh== MMee aa ss uurrMM ee aass uu rr eemmeenntteemmeenntt

50 ppm 2 meters 50 x 2 = 100 ppm•meter10 ppm 10 meters 10 x 10 = 100 ppm•meter100 ppm 20 meters 100 x 20 = 2000 ppm•meter

10 % LEL 2 meters .10 x 2 = .2 LEL•meter25% LEL 4 meters .25 x 4 = 1 LEL•meter100% LEL 1 meter 1 x 1 = 1 LEL•meter

tion of sensor drift and improvedimmunity to false alarms.

The Model IR5000 sourceprojects an infrared beam between5 and 100 meters through thehazardous area being monitoredto the IR5000 receiver. As the IRbeam reaches the receiver, it passesthrough a focusing lens and thenalternately passes through twonarrow band IR filters. One IR filteris the active wavelength and thesecond IR filter is the referencewavelength. The IR5000 detectorcomputes the ratio between theactive and reference signals toprovide an output that is propor-tional to the gas concentration inthe beam path.

5 0 0 0IR

O P E N P A T H H Y D R O C A R B O N G A S M O N I T O R I N G S Y S T E M

SPDT relays for warning, alarms andfault. Most options of the ModelIR5000 including the relay optionsfor alarm states and alarm setpoints are software selectable.

The Model IR5000 incorporatesfail-to-safe design and micro-processor technology for advancedperformance features and faultdiagnostics. Included in the faultdiagnostics is a continuous opticalpath check and fault alarms willoccur if the optics are dirty (anautomatic gain control willadjust for loss of signal due todirty optics) or if the IR signal isweak or blocked or if an instru-ment malfunction occurs. Toprevent nuisance faults, a 30second time delay is incorporatedto prevent fault activation caused

N o W i n d 3 t o 4 M P H W i n d

I R 5 0 0 0 O p e n P a t h S y s t e m

D i g i t a l D i s p l a y

SSiimmuullttaanneeoouuss dduuaall rraannggee ddeetteeccttiioonn ((00 ttoo 55000000 ppppmm••mmeetteerr aanndd 00 ttoo 55 LLEELL••mmeetteerr))

AAuuttooTTRRAACCKK aalliiggnnmmeenntt aalllloowwss ffoorr eeaassyy iinnssttaallllaattiioonn

DDiiggiittaall ddiissppllaayy pprroovviiddeess ccoonnttiinnuuoouuss rreeaaddoouutt ooff ggaass ccoonncceennttrraattiioonn aannddffaauulltt ccooddeess

FFaauulltt ddiiaaggnnoossttiiccss mmoonniittoorr nniinnee ddiiffffeerreenntt ppootteennttiiaall pprroobblleemmss

MMuullttiippllee oouuttppuuttss::**00 ttoo 55000000 ppppmm••mmeetteerr :: 44--2200 mmAA,,

((11)) SSPPDDTT rreellaayy00 ttoo 55 LLEELL••mmeetteerr :: 44--2200 mmAA,,

((22)) SSPPDDTT rreellaayyssFFaauulltt :: ((11)) SSPPDDTT rreellaayy

** FFoorr hheeaavvyy hhyyddrrooccaarrbboonn ((pprrooppaannee)) uunniitt tthhee rraannggeess aarree00 ttoo 22000000 ppppmm••mmeetteerr aanndd 00 ttoo 11 LLEELL••mmeetteerr

SSiinnggllee ddeetteeccttiioonn bbeeaamm tteecchhnnoollooggyy wwhhiicchh eelliimmiinnaatteessddrriifftt aanndd ffaallssee aallaarrmmss

AAuuttoo zzeerroo ffeeaattuurree zzeerrooss bbaacckkggrroouunndd wwiitthh nnoo aaddjjuussttmmeennttss

NNoo ffiieelldd ccaalliibbrraattiioonn rreeqquuiirreedd

CCoonnttiinnuuoouuss ooppttiiccaall cchheecckk ffoorr bbeeaamm bblloocckkaaggee aanndd aauuttoommaattiicc ggaaiinn ssiiggnnaallrreedduuccttiioonn

OOppeenn ppaatthh ggaass ddeetteeccttiioonn ccoommpplleemmeennttss ppooiinntt ddeetteeccttiioonn aanndd ccaann bbee uusseedd aass aa ccoommppoonneenntt iinn aa ttoottaall ssyysstteemm ssoolluuttiioonn..

TThhee MMooddeell IIRR55000000 ccaann bbee uusseedd iinn aapppplliiccaattiioonnss wwhheerree aassiinnggllee mmoonniittoorr ccaann ccoovveerr aa lliinnee ooff sseevveerraall ppootteennttiiaall lleeaakkssoouurrcceess.. FFoorr eexxaammppllee,, aa rrooww ooff vvaallvveess oorr ppuummppss.. TThhee MMooddeellIIRR55000000 ccaann aallssoo bbee uusseedd ffoorr ppeerriimmeetteerr mmoonniittoorriinngg wwhhiicchh aassssuurreessggrreeaatteerr ccoovveerraaggee oovveerr wwiiddeerr aarreeaass tthhaann ppooiinntt ddeetteeccttiioonn.. FFoorreexxaammppllee,, ffeennccee lliinnee mmoonniittoorriinngg,, ttaannkk ffaarrmmss,, ggaass sspphheerreess oorrpprroocceessss aarreeaass ooff rreeffiinneerriieess..

OOtthheerr aapppplliiccaattiioonnss ffoorr tthhee MMooddeell IIRR55000000 iinncclluuddee oonneess wwhhiicchhaarree eennvviirroonnmmeennttaallllyy uunnffrriieennddllyy ttoo ppooiinntt ggaass ddeetteeccttiioonn.. PPooiissoonnss,,wwaatteerr sspprraayy,, aanndd eexxttrreemmee tteemmppeerraattuurreess aarree ttyyppiiccaall pprroobblleemmsswwhheerree ooppeenn ppaatthh ggaass ddeetteeccttiioonn ccaann bbee uusseedd..

FEATURES A

SPECIF ICAT IONS ASSYYSSTTEEMMSensor Type: Infrared absorptionRanges: “Light Hydrocarbon Methane” unit

0 to 5000 ppm•meter and 0 to 5 LEL•meter

Path Length: 5 to 100 m (16 to 328 ft), 130 m (427 ft.) optional

Response Time: T50 ≤ 4.5 seconds and T90 ≤ 8 seconds

when exposed to full scale gas concentration

in ppm range

Repeatability: ± 10% of last reading for each scale

Linearity: ± 10% over full scale for each scale

Calibration: No traditional calibration required

Field background zero adjustment provided

Warranty: Two years

Modes: Test gas, setup, alignment

Optional: “Heavy Hydrocarbon Propane” unit0 to 2000 ppm•meter and 0 to 1 LEL•meter detection ranges

MMEECCHHAANNIICCAALLHousing Size:

Source: 6.4” Dia x 12.0” Length

(163mm Dia x 305mm Length)

Receiver: 5.4” Dia x 16.7” Length

(137mm Dia x 424mm Length)

Enclosure Material: Copper-free Aluminum or 316 Stainless Steel

Weight:Source: 10 lbs (5 Kg) Aluminum

28 lbs (12.7 Kg) Stainless Steel

Receiver: 9 lbs (4.1 Kg) Aluminum

25 lbs (11.3 Kg) Stainless Steel

Mount: 11 lbs (5.0 Kg) Stainless Steel only

Conduit Entries: (2) Aluminum: 3/4 NPT

Stainless Steel: M20 x 1.5-6H

EENNVVIIRROONNMMEENNTTAALLOperating Temperature: -40°F to +140°F (-40°C to +60°C)Operating Humidity: 0 to 95% RH (Non-condensing)Vibration: Per ISA/CSA C22.2 No 152 and BS2011

Part 2.1 standardsWeatherproof rating: Type 4X, IP66Certification: Class 1, Div. 1, Groups C & D / EExd IIB T4

CSA-CUS, ATEX & GOSTAccessories: Test gas filters

Mounting arm

EELLEECCTTRRIICCAALLOperating Voltage: 24 VDC nominal, 20-32 VDC range

Power Consumption:

Source: 24 VDC @ 1.25 amp (Maximum)

Receiver: 24 VDC @ 1.05 amp (Maximum)

Outputs: Two (2) analog signals and four

(4) SPDT relays

Analog Signals: 600 ohm load max.

0-5000 ppm•meter 0-5 LEL•meter0 mA Malfunction Malfunction1.5 mA Beam Block Beam Block

or test gas or test gas 4-20 mA 0 - 5000 ppm•meter 0 - 5 LEL•meter20-22 mA Overrange Overrange

Relays:

Four (4) SPDT 5 amp @ 30 VDC res. max; 250 VAC;

ppm Alarm; LEL Warning; LEL Alarm and Fault

Software Selectable:Latching/Non-Latching Warning and Alarm

Energized/De-Energized Warning and Alarm

Warning & Alarm level set-points

Digital Display:

Two digit, seven segment (auto range change)

LED indication of scale displayed

Fault Codes:

F1 - Close to minimum signal level

F2 - Timing error

F3 - Low IR energy

F4 - High IR energy

F5 - Large sudden change (blockage) 30 second Fault delay

F6 - Low voltage

F7 - Internal system failure

F8 - Failed to zero/Excessive negative drift due tobackground gas changes

F9 - Open current loop(s)

Standard Configuration: IR5000-2-1-1-01-01-0

De-energized relays, 20-100 meters,

aluminum housing, C5A

APPL ICAT IONS A

Lake Forest, CA26776 Simpatica CircleLake Forest, California92630U.S.A.Tel: + 1-949-581-4464FAX: + 1-949-581-1151

Houston, Texas9776 Whithorn DriveHouston, Texas77095U.S.A.Tel: + 1-281-855-6000FAX: + 1-281-855-3290

Galway, IrelandBallybrit Business ParkGalwayRepublic of IrelandTel: + 353 91 751175FAX: + 353 91 751317

SingaporeNo. 2 Kallang Pudding#09-16 Mactech BuildingSingapore 349307Tel: + 65 6748 3488FAX: + 65 6748 1911

Middle EastP.O. Box 61209Jebel AliDubaiUnited Arab EmiratesTel: + 971 4 8815751FAX: + 971 4 8817927

United KingdomHeather CloseLyme Green Business ParkMacclesfield, CheshireUnited Kingdom, SK11 OLRTel: + 44 1625 619583FAX: + 44 1625 619098

FB-IR5000-H1206

Specifications subject to change without notice.

Represented by:

Visit our Web Site at: http://www.generalmonitors.com

■ S e n s o r i m m u n e t o p o i s o n s

■ Fa i l - t o - s a f ed e t e c t i o n

■ H i g h s e n s i t i v i t yl e a k d e t e c t i o n

■ H a z a r d o u s l e v e ld e t e c t i o n

■ “ N o t o o l s ”a d j u s t m e n t

■ Lo c a l i n d i c a t i o no f g a s

■ E a s yt ro u b l e s h o o t i n g

■ Va r i o u s a l a r mo p t i o n s

■ Lo w m a i n t e n a n c e

■ E a s y i n s t a l l a t i o n

■

■

■

■

■

■

■

■

■

I R 5 0 0 0OPEN PATH HYDROCARBON

GAS MONITORING SYSTEM

Email: info@generalmonitors.com

SSiimmuullttaanneeoouuss dduuaall rraannggee ddeetteeccttiioonn ((00 ttoo 55000000 ppppmm••mmeetteerr aanndd 00 ttoo 55 LLEELL••mmeetteerr))

AAuuttooTTRRAACCKK aalliiggnnmmeenntt aalllloowwss ffoorr eeaassyy iinnssttaallllaattiioonn

DDiiggiittaall ddiissppllaayy pprroovviiddeess ccoonnttiinnuuoouuss rreeaaddoouutt ooff ggaass ccoonncceennttrraattiioonn aannddffaauulltt ccooddeess

FFaauulltt ddiiaaggnnoossttiiccss mmoonniittoorr nniinnee ddiiffffeerreenntt ppootteennttiiaall pprroobblleemmss

MMuullttiippllee oouuttppuuttss::**00 ttoo 55000000 ppppmm••mmeetteerr :: 44--2200 mmAA,,

((11)) SSPPDDTT rreellaayy00 ttoo 55 LLEELL••mmeetteerr :: 44--2200 mmAA,,

((22)) SSPPDDTT rreellaayyssFFaauulltt :: ((11)) SSPPDDTT rreellaayy

** FFoorr hheeaavvyy hhyyddrrooccaarrbboonn ((pprrooppaannee)) uunniitt tthhee rraannggeess aarree00 ttoo 22000000 ppppmm••mmeetteerr aanndd 00 ttoo 11 LLEELL••mmeetteerr

SSiinnggllee ddeetteeccttiioonn bbeeaamm tteecchhnnoollooggyy wwhhiicchh eelliimmiinnaatteessddrriifftt aanndd ffaallssee aallaarrmmss

AAuuttoo zzeerroo ffeeaattuurree zzeerrooss bbaacckkggrroouunndd wwiitthh nnoo aaddjjuussttmmeennttss

NNoo ffiieelldd ccaalliibbrraattiioonn rreeqquuiirreedd

CCoonnttiinnuuoouuss ooppttiiccaall cchheecckk ffoorr bbeeaamm bblloocckkaaggee aanndd aauuttoommaattiicc ggaaiinn ssiiggnnaallrreedduuccttiioonn

OOppeenn ppaatthh ggaass ddeetteeccttiioonn ccoommpplleemmeennttss ppooiinntt ddeetteeccttiioonn aanndd ccaann bbee uusseedd aass aa ccoommppoonneenntt iinn aa ttoottaall ssyysstteemm ssoolluuttiioonn..

TThhee MMooddeell IIRR55000000 ccaann bbee uusseedd iinn aapppplliiccaattiioonnss wwhheerree aassiinnggllee mmoonniittoorr ccaann ccoovveerr aa lliinnee ooff sseevveerraall ppootteennttiiaall lleeaakkssoouurrcceess.. FFoorr eexxaammppllee,, aa rrooww ooff vvaallvveess oorr ppuummppss.. TThhee MMooddeellIIRR55000000 ccaann aallssoo bbee uusseedd ffoorr ppeerriimmeetteerr mmoonniittoorriinngg wwhhiicchh aassssuurreessggrreeaatteerr ccoovveerraaggee oovveerr wwiiddeerr aarreeaass tthhaann ppooiinntt ddeetteeccttiioonn.. FFoorreexxaammppllee,, ffeennccee lliinnee mmoonniittoorriinngg,, ttaannkk ffaarrmmss,, ggaass sspphheerreess oorrpprroocceessss aarreeaass ooff rreeffiinneerriieess..

OOtthheerr aapppplliiccaattiioonnss ffoorr tthhee MMooddeell IIRR55000000 iinncclluuddee oonneess wwhhiicchhaarree eennvviirroonnmmeennttaallllyy uunnffrriieennddllyy ttoo ppooiinntt ggaass ddeetteeccttiioonn.. PPooiissoonnss,,wwaatteerr sspprraayy,, aanndd eexxttrreemmee tteemmppeerraattuurreess aarree ttyyppiiccaall pprroobblleemmsswwhheerree ooppeenn ppaatthh ggaass ddeetteeccttiioonn ccaann bbee uusseedd..

FEATURES A

SPECIF ICAT IONS ASSYYSSTTEEMMSensor Type: Infrared absorptionRanges: “Light Hydrocarbon Methane” unit

0 to 5000 ppm•meter and 0 to 5 LEL•meter

Path Length: 5 to 100 m (16 to 328 ft), 130 m (427 ft.) optional

Response Time: T50 ≤ 4.5 seconds and T90 ≤ 8 seconds

when exposed to full scale gas concentration

in ppm range

Repeatability: ± 10% of last reading for each scale

Linearity: ± 10% over full scale for each scale

Calibration: No traditional calibration required

Field background zero adjustment provided

Warranty: Two years

Modes: Test gas, setup, alignment

Optional: “Heavy Hydrocarbon Propane” unit0 to 2000 ppm•meter and 0 to 1 LEL•meter detection ranges

MMEECCHHAANNIICCAALLHousing Size:

Source: 6.4” Dia x 12.0” Length

(163mm Dia x 305mm Length)

Receiver: 5.4” Dia x 16.7” Length

(137mm Dia x 424mm Length)

Enclosure Material: Copper-free Aluminum or 316 Stainless Steel

Weight:Source: 10 lbs (5 Kg) Aluminum

28 lbs (12.7 Kg) Stainless Steel

Receiver: 9 lbs (4.1 Kg) Aluminum

25 lbs (11.3 Kg) Stainless Steel

Mount: 11 lbs (5.0 Kg) Stainless Steel only

Conduit Entries: (2) Aluminum: 3/4 NPT

Stainless Steel: M20 x 1.5-6H

EENNVVIIRROONNMMEENNTTAALLOperating Temperature: -40°F to +140°F (-40°C to +60°C)Operating Humidity: 0 to 95% RH (Non-condensing)Vibration: Per ISA/CSA C22.2 No 152 and BS2011

Part 2.1 standardsWeatherproof rating: Type 4X, IP66Certification: Class 1, Div. 1, Groups C & D / EExd IIB T4

CSA-CUS, ATEX & GOSTAccessories: Test gas filters

Mounting arm

EELLEECCTTRRIICCAALLOperating Voltage: 24 VDC nominal, 20-32 VDC range

Power Consumption:

Source: 24 VDC @ 1.25 amp (Maximum)

Receiver: 24 VDC @ 1.05 amp (Maximum)

Outputs: Two (2) analog signals and four

(4) SPDT relays

Analog Signals: 600 ohm load max.

0-5000 ppm•meter 0-5 LEL•meter0 mA Malfunction Malfunction1.5 mA Beam Block Beam Block

or test gas or test gas 4-20 mA 0 - 5000 ppm•meter 0 - 5 LEL•meter20-22 mA Overrange Overrange

Relays:

Four (4) SPDT 5 amp @ 30 VDC res. max; 250 VAC;

ppm Alarm; LEL Warning; LEL Alarm and Fault

Software Selectable:Latching/Non-Latching Warning and Alarm

Energized/De-Energized Warning and Alarm

Warning & Alarm level set-points

Digital Display:

Two digit, seven segment (auto range change)

LED indication of scale displayed

Fault Codes:

F1 - Close to minimum signal level

F2 - Timing error

F3 - Low IR energy

F4 - High IR energy

F5 - Large sudden change (blockage) 30 second Fault delay

F6 - Low voltage

F7 - Internal system failure

F8 - Failed to zero/Excessive negative drift due tobackground gas changes

F9 - Open current loop(s)

Standard Configuration: IR5000-2-1-1-01-01-0

De-energized relays, 20-100 meters,

aluminum housing, C5A

APPL ICAT IONS A

Lake Forest, CA26776 Simpatica CircleLake Forest, California92630U.S.A.Tel: + 1-949-581-4464FAX: + 1-949-581-1151

Houston, Texas9776 Whithorn DriveHouston, Texas77095U.S.A.Tel: + 1-281-855-6000FAX: + 1-281-855-3290

Galway, IrelandBallybrit Business ParkGalwayRepublic of IrelandTel: + 353 91 751175FAX: + 353 91 751317

SingaporeNo. 2 Kallang Pudding#09-16 Mactech BuildingSingapore 349307Tel: + 65 6748 3488FAX: + 65 6748 1911

Middle EastP.O. Box 61209Jebel AliDubaiUnited Arab EmiratesTel: + 971 4 8815751FAX: + 971 4 8817927

United KingdomHeather CloseLyme Green Business ParkMacclesfield, CheshireUnited Kingdom, SK11 OLRTel: + 44 1625 619583FAX: + 44 1625 619098

FB-IR5000-H1206

Specifications subject to change without notice.

Represented by:

Visit our Web Site at: http://www.generalmonitors.com

■ S e n s o r i m m u n e t o p o i s o n s

■ Fa i l - t o - s a f ed e t e c t i o n

■ H i g h s e n s i t i v i t yl e a k d e t e c t i o n

■ H a z a r d o u s l e v e ld e t e c t i o n

■ “ N o t o o l s ”a d j u s t m e n t

■ Lo c a l i n d i c a t i o no f g a s

■ E a s yt ro u b l e s h o o t i n g

■ Va r i o u s a l a r mo p t i o n s

■ Lo w m a i n t e n a n c e

■ E a s y i n s t a l l a t i o n

■

■

■

■

■

■

■

■

■

I R 5 0 0 0OPEN PATH HYDROCARBON

GAS MONITORING SYSTEM

Email: info@generalmonitors.com