J And N SENSIT GOLD User manual

SENSIT®GOLD
For use with Combustible Gases
and optionally available
Oxygen and Toxic Gases
INSTRUCTIONMANUAL
J And N Enterprises, Inc.
851 Transport Drive
Valparaiso, IN 46383
Phone: [phone]
[phone]
Fax: [phone]
www.gasleaksensors.com
10/03 UL-V1
WARRANTY
Your SENSIT®GOLD is warranted to be free from defects in
materials and workmanship for a period of two years after pur-
chase (excluding calibration and batteries). If within the war-
ranty period, your instrument should become inoperative from
suchdefects, theunit willbe repairedor replacedat ouroption.
This warranty covers normal use and does not cover damage
whichoccursin shipmentorfailurewhich resultsfromalteration,
tampering,accident, misuse,abuse, neglector impropermain-
tenance. Proofof purchasemaybe requiredbefore warrantyis
rendered. Units out of warranty will be repaired for a service
charge. Internalrepair ormaintenancemust becompletedby a
JAndNauthorized technician. Violationwill voidwarranty.Units
must be returned postpaid, insured and to the attention of the
ServiceDept. forwarrantyorrepair.
This warranty gives you specific legal rights and you may have
other rights which vary from state to state.
J And N Enterprises, Inc.
851 Transport Drive
Valparaiso, IN 46383
Phone:[phone]
[phone]
Fax:[phone]
Approved UL913, For Class 1,
Division 1, Groups C & D
hazardous locations when used
with alkaline batteries.
7WA6
C
L
A
S
S I
F
I
E
D
Read and understand
instructions before use.
Warning:
To prevent ignition
of flammable or
combustible
atmospheres,
disconnect power
before servicing.

CONTENTS
Page # 1 Parts and Accessories
2 General Description
3 Specifications
4 Product Features
6 Sensor Types and Pumps
7 Battery Installation
8 Operation and Use
13 Calibration Check (Bump Test page 17)
14 Menu
19 Adjustable Features - Factory Only
20 Calibration
23 Warranty
PARTSANDACCESSORIES
Standard Accessories (included)
Two Piece -Polycarbonate Bar Hole Probe Assembly, Carrying
Case, Alkaline Batteries, Wrist Strap, Extra Sensor Cap with O-
Rings and Instruction Manual
Accessories and Replacement Parts
ASG0150 Extension Adapter
ASG0128 Hydrocarbon Filter (6)
AJN02023 Hot Air Probe Assembly
AJN02017 32” Fiberglass Bar Hole Probe with Filter
AJN02013 Confined Space Probe with Tubing
ASG0500-P Printer
AJN02033-PCI PC Interface
CSC00100 SMART-CAL™Automatic Calibration System
PJN0110 Sensor Cap with O-Rings
Calibration Kits Contact us for correct Calibration Kit.
1 2
(Continued on page 3)
The Sensit®Gold is designed to detect combustible gases,
oxygen content and toxic gases when so equipped with the
available sensors. Each model of the Sensit®Gold provides
specific detection features based on available sensor options.
Each Sensit®Gold can be re-configured or upgraded by the
manufacturer for an additional charge should your sensing re-
quirements change. Consult J And N Enterprises, Inc. for a
listingof newsensors availablefor usewith theSensit®Gold.
All Sensit®Gold instruments incorporate low power semicon-
ductor sensor to measure combustible gases in LEL (Lower
ExplosiveLimit) range. An automaticallybacklit displayshows
all gas concentrations being measured. LEDs located on the
front of the instrument indicate preset visual warnings of in-
creasedgasconcentration. Allgases arecontinuouslysampled
with the use of an internal pump.
GENERALDESCRIPTION
SENSING FEATURES
SENSIT GOLD
INSTRUMENTS
®
MODEL EX
EX-CO
EX
EX-CO
EX-TOX
4GAS
Plus
Plus
Plus
MODEL
MODEL
MODEL
MODEL EX-TOX
MODEL
MODEL
LEL
ALARMS LEL DISPLAY LEAK DETECTION CARBON MONOXIDE OXYGEN HYDROGEN SULFIDE

3
GENERAL DESCRIPTION continued from page 2
Audibleandvisualalarmswarn theoperatorofhazardouscondi-
tions being sensed. The preset alarms are indicated by a red
flashingLED, displayindicator andalarm sound. Thecombus-
tiblegasalarm ispreset50%LEL methane.Thecarbonmonox-
ide(CO) alarmispreset at50ppm.The oxygen(O2) alarmsare
presetat below19.5% andabove23.5%. Thehydrogen sulfide
(H2S) alarm is preset at 10ppm.
The Sensit®Gold instruments is approvedbyUnderwritersLabo-
ratories to UL913, for Class 1, Division 1, Groups C & D hazardous
locations when used with alkaline batteries.
SPECIFICATIONS
SENSORSPECIFICATIONS
TYPE RESOLUTION RANGE ACCURACY
Leak N/A 0-50,000ppm N/A
LEL 0.1% 0-100% ±10%
O20.1% 0-25% ±0.2% or 2%*
CO 1ppm 0-2000ppm ±5ppm or 5%*
H2S 1ppm 0-100ppm ±2ppm or 5%*
* Whichever is greater
PRODUCTSPECIFICATIONS
Size: 11.5” x 3” x 2.32” (292 x 76 x 69 mm)
Weight: 1.2 lbs.
Operational Temp: 0 to 120° F
Storage Temp: -20° to 132° F
BatteryLife: Alkaline: approximately 16 hrs. continuous
4
Sensit®Gold instruments are constructed of durable Cycoloy
plastic to withstand the rigors of field use.
Incorporatedinthe handgripareais thebattery compartment.
All Sensit®Gold instruments require 3 “C” type alkaline or re-
chargeable batteries. Duracell MN 1400 batteries provide ap-
proximately 16 hours of continuous use. A tick adjust knob,
whenso equipped,is locatedonthe rightside oftheinstrument
toactivatetheaudibleticksound thathelpsinlocatingthesource
of a gas leak. This tick is generated by using specialized cir-
cuitry in combination with the LEL sensor located at the end of
the gooseneck assembly.
PRODUCTFEATURES
BACKLIT
2 LINE DISPLAY
SPEAKER
(ON BACK)
WARNING LED’S
16”FLEXIBLE
GOOSENECK
IR LED
(DOWNLOADING) LUER PROBE
CONNECTOR
SENSOR CAP WITH
WATER/DIRT FILTER
LEAK/LEL
SENSOR
PUSHPAD
BUTTONS
BATTERY
COMPARTMENT
ALL OTHER
SENSORS &
PUMPS (INTERNAL)
(Continued on page 5)

5
PRODUCT FEATURES continued from page 4
The tick can be easily heard with the speaker located in the
back of the instrument.
An infrared LED is located on the right side to allow the
Sensit®Goldinstrumentstodownloadcalibrationdataandread-
ings the operator has elected to save to the instrument’s on-
boardmemory.
A flexible gooseneck is used to assist in locating the source
ofgas leaks andremotesampling. Awater/dirt trapislocated at
the end with a convenient luer style connector to attach sam-
plingand probeaccessories.
A two line display continuously updates the operator of all
availablegasconcentrations andalarmssimultaneously aswell
as indicatesinternalfunctionssuchasairflowandbatterypower.
Belowthe displayis aseries ofLEDs thatare presettoindicate
combustiblegas concentrations. TheredLED ontheright side
willflash duringany alarmcondition.
There are 3 operational button pads on the front of all
Sensit®Gold CGI instruments.
•LEFT BUTTON: Operates power andmute features.
•CENTERBUTTON:Operates a Bar Hole (BH) Test mode to
assistinpinpointing undergroundleakage
andoperates auser menu to calibrate,
download and set the clock.
•RIGHT BUTTON: Activates thesave featureand performsa
manual zeroing of the sensors.
Pressing any button will produce a click sound.
Combustible Gas Sensor
AllSensit®Goldinstrumentsincorporateahighlysensitivesemi-
conductor type sensor. The function and accuracy of the sen-
sor are monitored and controlled by specialized circuitry and a
microprocessor. This sensor is capable of measuring concen-
trations as low as 50ppm of methane (natural) gas up to 100%
LELmethane.
Electrochemical Sensors (optional)
AllSensit®Gold instruments whenequipped withthefollowing
optional sensors, microprocessor and associated circuitry will
measureoxygenlevels from0-25%;measurecarbon monoxide
(CO)levels from0-2000ppm; measurehydrogen sulfide(H2S)
levelsfrom 0-100ppm. All gasesare displayedsimultaneously
on the display.
The Pump
TheSensit®Goldinstrumentsareequippedwitha powerfuland
efficient rotary vane pump. A water/dirt filter at the end of the
gooseneck protects the pump from foreign material. An addi-
tional internal filter protects the pump from damaging debris if
theprimary filterismissing ordamaged. There areaudibleand
visual indicators that will show a blocked or improperly operat-
ingpump.
SENSORTYPES AND PUMPS
6
This safety symbol is used to indicate
a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury.
NOTICE
CAUTION

BATTERYINSTALLATION/REPLACEMENT
Batteryreplacement is necessarywhen thedisplay readsBAT
LOW,anaudiblealarmsoundsandthegreenreadyLEDflashes.
WhenBAT LOWisdisplayed,the instrumenthasapproximately
30minutes of usefuloperation timeprior to shutoff.
CAUTION: Always change batteries in an environment
free of combustible gases.
Removethe batterysleeve coverbydepressing thelocking tab
on the front of the handle (yellow) with a coin or flat object and
pulling the handle away from the top or display area of the in-
strument.
Place 3 approved batteries into the battery holder. For best
resultshold thebattery compartmentso thatit laysin yourright
hand. With your left hand install the battery that goes toward
the front first. The battery that is in contact with the rear spring
secondandfinally insertthethird batteryinthe centerbyforcing
thesecond batterysuchthat thespring compressesandallows
the batteries to go into place. If you do not use your right hand
tohold thebottom ofthebattery compartmentthe batteriescan
come out.
Observethepolaritymarkingson theinsideofthebatteryholder.
Improper installation will cause the instrument not to operate.
Replace the battery sleeve and allow the locking tab to snap
into position.
Checkto besurethe handleissecure to theinstrumentbody by
gentlypulling thehandle away. Thehandle willremain firmlyin
place if a proper connection is made.
78
(Continued on page 9)
1. Pushthe POWERbuttonto initiateoperation. Abeep willbe
heardduring anybuttonactivation.
CAUTION: Always start any Sensit®Gold in a gas free
environment to insure a proper zero.
2. Ifthedisplay failstoilluminate or“BATLOW”is shownonthe
display, replaceor rechargethe batteries. There is room inthe
carrying case to keep an extra set of alkaline batteries.
3. Uponsuccessful start-up,thepump willstartand thedisplay
will illuminate. The instrument will then display:
a.Productnameand softwareversion.
b.System check for proper pump and battery
operation.
c.Date and time.
d.SerialNumber.
e.Display “CALPAST DUE” only when calibration is
overdue.
f. Warm-upcountdownfor10 seconds.
g.Display“AUTOZERO” indicatingthezeroing ofall
sensors.
h.Any sensor that is completely inoperable during start
up will be indicated by “FAIL” on the display in the
locationwhere readingswouldnormally belocated.
TheGREEN READYLIGHTwill notilluminate
indicatingthe instrumentrequires service.
OPERATIONANDUSE

9(continued on page 10)
OPERATION AND USE continued from page 8
4. Thedisplaywillindicate LELreadings(whensoequipped)by
displaying an “L” next to the percent symbol. All LEL readings
havea resolutionof 0.1%LEL or50ppmmethane.
5. Itmaybenecessary tomanuallyZEROtheinstrumentbased
oncompanypractices andenvironmentalconditions. IfLELlev-
els are preset, zeroing will not be possible.
6. Prior to use, test the integrity of the sensor cap and tubing.
Use your finger to block the inlet of the sensor cap for 4-5 sec-
onds. The display will read “FLOW BLOCKED” if all seals are
intact. If this does not occur change the sensor cap and “O”
rings.Aspare sensor cap and “O” rings are shipped with each
product.During pumpflow block,abeep willoccur every2sec-
onds until the pump restarts and adequate flow is present.
7. Whentesting areaswith elevatedtemperatures suchasap-
pliance vents or flues always attach the optional hot air probe
assembly. Attach the probe by twisting the connector of the
probe onto the matching adapter at the end of the sensor cap.
These connections need only be finger tight. It is necessary to
usea particlefilter anddesiccant whenperforming fluetesting.
The use of an unapproved probe assembly may void the war-
ranty.
CAUTION: Do not handle the steel portion of any hot
air probe after use as burns may occur!
10
(continued on page 11)
OPERATION AND USE continued from page 9
8. When testing remote areas with dirt, water or debris it may
be necessary to clean or replace the sensor cap from time to
time. Additional filters may be placed into any sampling as-
semblies as long as they will allow a pump flow block to show
on the display. If this does not occur there is leakage and im-
properreadings mayresult.
9. When testing high areas or overhead lines the use of the
optionalextensionadapter willallowa broomhandleor painters
stick to extend the instrument to the area where sensing must
beaccomplished.This slidesontothe batterysleeveandis held
in place by the locking nut assembly.
10. When testing areas the appropriate sensors will cause the
display to update when a gas is encountered. Additionally, if a
combustiblegas isencountereda seriesofLEDs onthe frontof
the instrument will illuminate when the preset concentrations
arereached. Ifany alarmconditionexistsfor anysensor, based
ontheir presetalarm points,the red(HAZ3) LED willflash and
the alarm will sound. Additionally, the reading for the gas ex-
ceeding the alarm set point will also flash.
Thepreset alarmpoints are:
a. Combustible gas - Methane 50% LEL - 100% LEL
i. Green LED/Ready = 0-4.9% LEL Methane
ii.Amber LED/Low = 5-9.9% LELMethane
iii.Red LED/Haz1= 10.0-24.9% LEL Methane
iv.Red LED/Haz2= 25.0-49.9%LELMethane
v. Red LED/Haz3 = 50% LEL- 100% LEL

11 12
OPERATION AND USE continued from page 10
(continued on page 12)
b.Oxygen -below 19.5%and above23.5%
c.Carbon Monoxide- 50ppmper industrystandards
d.Hydrogen Sulfide -10ppmand aboveperFederal OSHA
guidelines
Caution: These instruments have cross sensitivities to
a variety of gases. J And N is continuing to create a cross
sensitivitychartbasedonmethane calibrations for the com-
bustiblesensor. Other sensors have limitedcrosssensitiv-
ity properties though they do exist. Be sure to contact J
And N for the latest information.
11. To disable the audible alarm press and release the left but-
ton (MUTE). To enable the alarm press it again. During an
alarm the gas that has exceeded the preset alarm point will
flash on the display and the HAZ3 LED will flash indicating a
potentialunsafe condition.Whencombustible gasreadings ex-
ceedthealarmrange, allLEDs(exceptgreenandred HAZ3)will
turnoff.
12. To assist in locating the source of small combustible gas
leaks or surveying areas outdoors or indoors, rotate the
thumbwheellocatedon therightside of theinstrument,when so
equipped, until a steady ticking sound is heard. Note: There is
no warm-up for this feature as it uses the LEL sensor that is
alreadyoperating. Move thesensor headtoward theareasus-
pected of leakage. As the sensor head moves closer to a leak
source the tick will increase. When the tick becomes a steady
tone rotate the thumbwheel in a clockwise direction while
OPERATION AND USE continue from page 11
keeping the sensor head in the same position. This will slow
downthe tickand allowthe operatorto findahigher concentra-
tion using the same procedure. If the tick goes away you have
movedaway fromthe leakorthereisno moregaspresent. The
leakagerate maybe lessthan therate thepump isdrawing the
sample. For best results always use the leak detector prior to
using any liquid leak detection fluids as these sensors will de-
tect their presence.
13. At any time the operator may save the readings on the
displayby pressingtheSAVEbuttonon theright. This willsave
allreadings fordownloadat alater time. Thememoryis factory
set to store 6 events. This can be adjusted from 1-15 at the
factory.The mostrecent saveisfirst duringdownload.
14.Followingfederal, State,Municipaland/or Companyproce-
dures move to the areas where gas readings are suspected or
must be tested. Use necessary accessories to draw samples
from areas not accessible with the instrument itself, such as
confined spaces or flue gases. During sampling the respective
readings may change. Audible and visual alarms will activate
whenthe preset limitsare reached.
15. When being used in dark areas an automatic backlight will
illuminate the display.
16.To turn instrumentoff,pushandholdthe powerbuttonfor 5-
6 seconds until “POWER DOWN” appears on the display.

14
(continued on page 15)
MENU
The Sensit®Gold has several user adjustable features in the
USERMENU. Theseinclude:
PRINT MENU:Printing session, calibration, Bar Hole Test logs
andaccessing Smart-CalAutomaticCalibration Station.
CALIBRATION:Calibrate CO,H2S,LELandaccess Smart-Cal
AutomaticCalibration Station.
POWER OFF:Set the automatic shut off timer in minutes.
SET CLOCK:Setdate andtime.
SHOW CAL LOG:Display last calibration of all gasses.
SHOW SES LOG:Displaysaved gasreading datawith date
and time.
BUMP TEST:Perform automatic test for response to minimum
of 80% of calibrated gas value within 45 seconds.
SMART-CAL:Access automaticcalibrationstation.
PRINTMENU
From the working display access the menu by pressing and
holding the menu button until the top line of the display reads
USER MENU. The bottom line will read PRINT MENU. Press
thecenter button toaccess thePRINT MENUoptions. Usethe
right button to select the CAL LOG or SESSION LOG option.
Atthis timepreparetheprinter.AimtheIR LEDon therightside
of the instrument to the IR receptor on the printer. Press the
centerbutton toprintthe data.Pressing theleftbutton willreen-
ter the USER MENU.
13
Toverify theaccuracy ofanySensit®Gold, it mustbeexposed
to a known concentration of test gas that will test any sensor
combinationincluded inyour particular model. Anysensor that
does not meet the specifications listed in this manual may re-
quire calibration or repair. Acalibration check does not update
the calibration due date. Full calibration is required to update
these times.
Acalibration past duemessagewill illuminateduringwarm-up if
calibrationhas notbeenperformed peryourcompany specified
interval. Anytime it is suspected the Sensit®Gold is not work-
ingproperly, checkcalibration.
CALIBRATION CHECK

15 (continued on page 16)
MENU continued from page 14
Use the right button at this time to scroll to another menu func-
tionas indicatedbythe toplinereading USERMENU.Pressing
theleftbutton willreturntheinstrumentto theworking(gasread-
ings) display.
POWER OFF
From the working display access the menu by pressing and
holding the menu button until the top line of the display reads
USER MENU. Press and release the right button until the bot-
tom line displays POWER OFF. Press the center button. Use
the right button to increase the number of minutes of run time
andthe centerbutton toreduce them.Setting thetimer to0 will
causethe unitto alwaysremain on.Afteradjusting thenumber,
press and release the left button to save the adjustment. Use
theright buttonatthis timeto scrolltoanother menufunctionas
indicatedby thetopline readingUSERMENU. Pressingtheleft
button will return the instrument to the working (gas readings)
display.
SETCLOCK
From the working display access the menu by pressing and
holding the menu button until the top line of the display reads
USER MENU. Press and release the right button until the bot-
tom line displays SET CLOCK. Press the center button. The
day will flash upon entering the SET CLOCK option. The right
buttonadvancesto thenextitem andthecenterbutton changes
the flashing item. All settings are based on US time and date
settingsusing a 24hourclock.Afteradjusting allnumberspress 16
MENU continued from page 15
andrelease theleftbutton tosavethe adjustment.Use theright
button at this time to scroll to another menu function as indi-
cated by the top line reading USER MENU. Pressing the left
button will return the instrument to the working (gas readings
display.
SHOW CAL LOG
From the working display access the menu by pressing and
holding the menu button until the top line of the display reads
USER MENU. Press and release the right button until the bot-
tom line displays SHOW CAL LOG. Press the center button.
Atthis timeone of thegases andthe lastcalibrationdate willbe
displayed. Use the right button to review all other calibrations
dates and their respective gases.After review of the last avail-
able gas the instrument will automatically return to the user
menuas indicatedbythe topline readingUSERMENU. Press-
ing the left button will return the instrument to the working (gas
readings)display.
SHOW SES LOG
From the working display access the menu by pressing and
holding the menu button until the top line of the display reads
USER MENU. Press and release the right button until the bot-
tom line displays SHOW SES LOG. Press the center button.
Use the right button to scroll to the saved session you wish to
review.SESSION 1isthe mostrecentdatasaved. Pressingthe
center button will display the date and time of that session.
(Continued on page 17)

18
SMART-CAL
From the working display access the menu by pressing and
holding the menu button until the top line of the display reads
USER MENU. Press and release the right button until the bot-
tom line displays SMART CAL. Place the instrument into the
cradleprovidedon theleftsideof theSmart-CalCalibrationSta-
tion. Attach the tubing from the station to the inlet side of the
instrument. Press the center button. The display will show
“SMARTCALCommunicating”and thepumpwillturnoff. Select
thetest fromthe Smart-CallStationtobe performed.Atthe end
ofthe testthe instrumentwillbeep 3times anddisplay PASS or
FAIL. Retry the test if necessary by pressing the proper button
on the Smart-Cal Station again. Press the left button to return
theworking display,remove thetubing andreturninstrument to
service or send instrument to the proper place for repair per
company procedures.
SHORTCUT TO ACCESS SMART-CAL: Place theinstrument
intothe cradle providedonthe leftsideof theSmart-Calcalibra-
tionStation.Attachthe tubingfromthe station tothe inletsideof
the instrument. While in the working display press the power
button for 2-3 seconds and release. The display will show
“SMART CAL Communicating” and the pump will turn off. Per-
form all tests as described in the SMART CAL section.
MENU continued from page 18
17
MENU continued from page 16
Pressing the center button again will display the gas reading.
Pressingthe rightbuttonwill allowyouto scrollthroughall other
gas readings. Press the left button to return to SESSION (No.)
and pressing the right button will allow you to review all previ-
ously saved SESSION’s by date. Press the center button to
review the gas data. Pressing the left button 3 times will return
you to the USER MENU. Pressing the left button once more
returns you to the working display. The number of stored ses-
sionlog savesis factoryset at6.It canstore upto 16bychang-
ing factory settings (contact factory for instructions).
BUMPTEST
From the working display access the menu by pressing and
holding the menu button until the top line of the display reads
USER MENU. Press and release the right button until the bot-
tomline displays BUMPTEST.Prepare 50%LEL, 100ppmCO
and/or 25ppm H2S gases for application to the instrument.At-
tach the hose to the inlet connection. Turn on the gas. Press
thecenterbutton.EACHGAS must read80%ofcalibratedvalue
within 45 seconds. The readings are on the left and the timer
ison the right side of the display. If the instrument passes, the
displaywillread BUMPTESTPASSES andabeep willsound.If
the instrument fails, the display will read BUMPTEST FAILED
anda beepwillsound.Attheend ofanybump testpressthe left
button to return to the working display.
(Continued on page 18)

20
(Continued on page 21)
Calibration is the process of setting the readings of the instru-
ment to equal the value of certified calibration gases. Prior to
calibration allow the instrument to operate for 5 minutes in a
room environment free of combustible, CO and H2S gases.
Manually zero the instrument prior to beginning the calibration
process.
NOTE: Using calibration kits other than recommended by
J And N may cause inaccurate readings. Repairs are re-
quired if any sensor fails to calibrate. Consult J And N for
details.
NOTE: When calibrating, the numbers shown on the dis-
play represent the numbers seen by the microprocessor
and should not be confused with actual gas readings.
STEP 1
From the working display access the menu by pressing and
holding the menu button until the top line of the display reads
USER MENU. Press and release the right button until the bot-
tomlinedisplays CALIBRATION. Press thecenterbutton. The
topline willnowread CALIBRATION.
Usethe rightbutton toview theCO 100ppm,H2S 25ppm,50%
LELcalibration options.If theinstrumentcannot calibrateprop-
erly to the calibration gas applied BAD CAL will appear after 2
minutes.Calibrationreadingsupdate onthedisplayevery5 sec-
onds.
CALIBRATION
19
ADJUSTABLEFEATURES(FACTORYONLY)
ADJUSTABLEDFEATURES (FACTORYONLY)
Session Saves 1-15 6
Purge Time 0-30 Seconds 0 Seconds
%LEL NA %LEL
Alarm - LEL 0-99% 50%
Alarm - O (low only) 0.1-20.0% 19.5% (OSHA)
Alarm - CO 0-999ppm 50ppm
Alarm - H S 0-3-ppm 10ppm
Cal Due Interval 30, 45, 60, 90, 180, 360 Days 30 Days
Show Session Log* 10-15 6
2
2
DEFAULTSAVES RANGE
*Can be disabled
1-15

22
CALIBRATION continued from page 21
COMBUSTIBLEGASCALIBRATION (50.0% LEL)
Perform STEP 1 first. To calibrate LEL, push the center button
whenthetoplinereadsCALIBRATION andthebottomlinereads
50% LEL NAT. Immediately apply 50% LEL methane (balance
air).Whenthe readingissatisfactory,thedisplay willreadDATA
SAVEDindicatingcalibrationiscomplete.ThedateforCALPAST
DUE is automatically reset at this point. Press the right button
to advance to another gas to be calibrated as indicated by the
top line of the display reading CALIBRATION and the bottom
linereading anothergas. Pressing theleftbutton willreturn the
instrumentto theworking (gasreadings) display.
Removethegas.
OXYGEN(O2)CALIBRATION
There is no menu option to select oxygen (O2) calibration. At
thispoint iftheinstrment isoperated,the readingswillbe based
onthe last successfulcalibration andmay beinaccurate. Cali-
bration is also performed during any manual zeroing. Calibra-
tioncan be verifiedusing 100%nitrogen. The readings should
be less than 0.4%.
NOTE:Improper calibration is indicated by “Bad Cal” when
save is attempted. Calibration will be based on the last
successfulcalibration. Recalibration is recommended. The
calibration due date will not be updated until successful
calibration has occurred. Any instrument that does not
calibrate requires service. Contact J And N for details.
21
CALIBRATION continued from page 20
(continued on page 22)
CARBONMONOXIDE (CO) CALIBRATION(CO - 100PPM)
Perform STEP 1 first. To calibrate CO, push the center button
whenthetoplinereadsCALIBRATIONandthebottomlinereads
CO 100 PPM. Immediately apply 100 ppm CO (balance air).
When the reading is satisfactory, the display will read DATA
SAVED indicating calibration is complete. The date for CAL
PAST DUE is automatically reset at this point. Press the right
button to advance to another gas to be calibrated as indicated
by the top line of the display reading CALIBRATION and the
bottom line reading another gas. Pressing the left button will
return the instrument to the working (gas readings) display.
Removethegas.
HYDROGENSULFIDE (H2S) CALIBRATION (H2S-25PPM)
PerformSTEP 1first. To calibrateH2S, pushthe centerbutton
whenthetoplinereadsCALIBRATIONandthebottomlinereads
H2S25PPM.Immediatelyapply25ppmH2S(balanceair). When
the reading is satisfactory, the display will read DATA SAVED
indicatingcalibration iscomplete.The datefor CALPASTDUE
is automatically reset at this point. Press the right button to
advanceto anothergas tobe calibratedas indicatedby thetop
line of the display reading CALIBRATION and the bottom line
reading another gas. Pressing the left button will return the
instrumentto theworking (gasreadings) display.
Removethegas.