SENSIT Technologies SENSIT GOLD G2 User manual

INSTRUCTIONMANUAL750-00039 9-13-2010 REV. 3.0, 02.27.2012
Your Sensit®Gold G2 is warranted to be free from defects in materials and
workmanship for a period of two years after purchase (excluding calibra-
tion and batteries). The circuit board and percent gas sensor (TC) are war-
ranted for 5 years. If within the warranty period, your instrument should
become inoperative from such defects, the unit will be repaired or replaced
at our option. This warranty covers normal use and does not cover damage
which occurs in shipment or failure which results from alteration, tampering,
accident, misuse, abuse, neglect or improper maintenance. Proof of pur-
chase may be required before warranty is rendered. Units out of warranty
will be repaired for a service charge. Internal repair or maintenance must be
completed by a SENSIT Technologies authorized technician. Violation will
void warranty. Units must be returned postpaid, insured and to the attention
of the Service Dept. for warranty or repair.
This warranty gives you specific legal rights and you may have other rights
which vary from state to state.
SENSIT Technologies
851 Transport Drive • Valparaiso, IN 46383
Phone: [phone] • 888 4 SENSIT (473-6748)
Fax: [phone] • www.gasleaksensors.com
PARTSANDACCESSORIES
SENSITTECHNOLOGIES
851 Transport Drive
Valparaiso, IN 46383
Phone: [phone]
Fax: [phone]
US Toll Free: [phone]
www.gasleaksensors.com
Warning:
To prevent ignition
of flammable or
combustible
atmospheres,
disconnect power
before servicing.
SENSIT®GOLD G2
For use with combustible gases
and optionally available
oxygen and toxic gases.
INSTRUCTIONMANUAL Read and understand
instructions before use.
Ex ib IIB T3
AEx ia IIB T3
IP54
ATEX Cert. No. TRAC11ATEX21304X
II 2 G 0891
Intrinsically Safe for Use in
Class I, Groups C and D, T3
Hazardous Locations
Standard Accessories (included)
Carrying Case, Alkaline Batteries, Wrist Strap, Extra Sensor Cap with O-Rings,
T10 Torx Wrench and Instruction Manual
Accessories and Replacement Parts
870-00012 Extension Adapter
873-00012 Hydrocarbon Filter (10) (Barhole Probe with
filter required)
883-00023 Hot Air Probe Assembly
883-00019 81.3cm (32”) Fiberglass Bar Hole Probe w/Filter
883-00015 Confined Space Probe with Tubing
870-00004 Printer
870-00008 PC Interface with Software
914-00000-01 SMART-CAL™ Automatic Calibration System
870-00018 Sensor Cap with O-Rings
Calibration Kits Contact factory for correct kit
WARRANTY
Listed UL 913

CONTENTS
Page# 1 Sensit Gold G2 Models
2 General Description
3 Specifications
4 Product Features
6 Sensor Types and Pumps
7 Battery Installation
8 Operation and Use
14 Bar Hole Test
15 Calibration Check (Bump Test page 21)
16 Menu
28 Calibration
33 Expert User Feature Chart
Back Parts and Accessories, Warranty
SENSIT GOLD G2 MODELS (Sensors included)
Model No. LEL %Vol O2 CO H2S HCN
911-00000-01 • •••••
911-00000-02 • •••••
911-00000-03 • •••••
911-00000-04 • ••• ••
911-00000-05 • ••• ••
911-00000-06 • •••••
911-00000-07 • •••••
911-00000-08 • ••• • •
911-00000-09 • ••• ••
911-00000-51 • • ••••
911-00000-52 • • ••••
911-00000-53 • • • •••
911-00000-54 • • •• ••
911-00000-55 • • • • ••
911-00000-56 • • ••••
911-00000-57 • • • •••
911-00000-58 • • • • • •
911-00000-59 • • • • ••1
NOTICE: CAUTION: This safety symbol is used to
indicate a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
NOTICE: LEL sensor should be checked for accuracy after exposure
to any gases containing silicones, high sulfur content, high concentrations
of CO (above 1000ppm) or exhaust gases.
Continuously low calibration check results or fluctuation of zero readings
may indicate sensor end of life or failure. Consult SENSIT Technologies
with any questions.
For best accuracy always zero in clean air environments similar in
temperature and relative humidity to the environment where the instrument
will be used. When continuously exposed to combustible gas concentra-
tions beyond LEL for longer than 5 minutes always perform a calibration
check prior to the next use.
WARNING: To reduce the risk of ignition of a flammable atmosphere,
batteries must only be changed in an area known to be nonflammable.
WARNING: Use only DURACELL® PROCELL,Type PC1400Alkaline
Batteries
WARNING: Do not mix batteries of different age or type.
WARNING: Not for use in atmospheres of oxygen greater than 21%.
WARNING: ONLYzero instrument in a gas free environment.
WARNING: To maintain intrinsic safety, service must be performed by
factory authorized technicians with approved replacement parts only. No
substitution of components is permitted.
WARNING: All Accessories are to be used in an area known to be
non-flammable.

2(Continued on page 3)
TheSensit®Gold G2 is designedtodetect combustiblegases,
oxygen content and toxic gases when so equipped with the
availablesensors.Eachmodel ofthe Sensit®GoldG2provides
specific detection features based on approved sensor options.
EachSensit®Gold G2canbere-configured orupgradedbythe
manufacturer for an additional charge should your sensing re-
quirementschange.
Sensit Gold G2 configurations include measuring PPM, LEL
and/or % volume of combustible gases, measurement of oxy-
gen, carbon monoxide, and/or hydrogen sulfide or hydrogen
cyanidegas(es).
Sensit®GoldG2instrumentsincorporateanadvancedlowpower
semiconductorsensorto measurecombustiblegases intheLEL
(Lower Explosive Limit) range and a thermal conductivity style
sensortomeasurecombustiblegasesinthepercentvolumerange.
Theusermayselecteithermethaneorpropanegasreadingsfrom
ausermenudependingonthesensingrequirements.
An automatically backlit display shows all gas concentrations
being measured. LEDs located on the front of the instrument
indicatepreset visual warningsof increased gasconcentration.
All gases are continuously sampled with the use of an internal
pump.Audibleand visualalarmswarntheoperatorofhazardous
conditionsbeing sensed.
The preset alarms are indicated by a red flashing LED, display
indicatorand alarm sound.The combustiblegasalarm ispreset
for50% LEL(2.5% methaneor 1.1% propane).
GENERALDESCRIPTION GENERAL DESCRIPTION continued from page 2
Whenequippedwiththe optionalpercentvolumesensor, alarms
remainactivated up to 17%methane (12% propane).The car-
bon monoxide (CO) alarm is factory preset at 35ppm. The
oxygen(O2)alarmsarepresetatbelow19.5%andabove23.5%.
The hydrogen sulfide (H2S) alarm is preset at 10ppm. The hy-
drogen cyanide (HCN) alarm is set to 5ppm
The Sensit®Gold G2 instrument is approved ATEX Zone 1
intrinsicallysafe Ex ib IIBT3 IP54 and ULCLI, Div 1 GroupsC
& D,T3 hazardous locations. Consult Sensit Technologies for
certificatedetails.
APPROVEDBATTERIES:Duracell® PROCELLPC1400
SPECIFICATIONS
3
PRODUCTSPECIFICATIONS
Size: 292 x 76 x 59 mm
Weight: 544 g
OperationalTemp: -20 to 40° C
Storage Temp: -30 to 60° C
Battery Life: Alkaline: approximately 18 hrs. continuous
SENSORSPECIFICATIONS
TYPE RESOLUTION RANGE ACCURACY
LEL 0.1% up to 2%
increments 0-100% LEL ±10%
%GAS 0.1% 5-100% METHANE ±5%
2.2- 100% PROPANE
PPM 1ppm or
10ppm increments 0-2,000ppm ±10%
O20.1% 0-25% ±0.2% or 2%**
CO 1ppm 0-2000ppm ±5ppm or 5%**
H2S 1ppm 0-100ppm ±2ppm or 5%**
HCN 1ppm 0-30ppm ±1ppm or 2.5%**
** Whichever is greater

4
Sensit®Gold G2 instruments are constructed of durableABS
plastic to withstand the rigors of field use.
Incorporatedinthe handgriparea isthebattery compartment.
AllSensit®Gold G2 instruments require3“C” typealkalinebat-
teries.APPROVED BATTERIES: PROCELL® PC1400 batter-
iesprovide approximately18 hoursof use.
The tick can be easily heard with the speaker located in the
back of the instrument.
PRODUCTFEATURES
(Continued on page 5)
BACKLIT
GRAPHICDISPLAY
SPEAKER
(ON BACK)
WARNING LEDs
16”FLEXIBLE
GOOSENECK
IR COMMUNICATION LUER PROBE
CONNECTOR
SENSOR CAP WITH
WATER/DIRT FILTER
LEAK/PPM/LEL
SENSOR
PUSHPAD
BUTTONS
BATTERY
COMPARTMENT
ALL OTHER
SENSORS &
PUMPS (INTERNAL)
PRODUCT FEATURES continued from page 4
An infrared communication window is located on the right
sideto allowthe Sensit®Gold G2 instrumentto downloadcali-
brationdata,readingsthe operator haselectedmanuallytosave
totheonboardmemory,aswell as communicatewiththeSmart-
CalCalibration Stationand IRLink computer interface.
A flexible gooseneck is used to assist in locating the source
ofgas leaks andremote sampling. Awater/dirt trapislocated at
the end with a convenient luer style connector to attach sam-
plingand probeaccessories.
Agraphicdisplaycontinuouslyupdatestheoperatorof allavail-
able gas concentrations and alarms simultaneously as well as
indicates internal functions such as air flow and battery power.
Belowthe displayis a seriesof LEDsthat arepreset toindicate
combustiblegas concentrations.The redLED onthe right side
willflash duringany alarmcondition.In darkenedenvironments
the backlight will illuminate in red during alarm conditions.
There are 3 operational button pads on the front of all
Sensit®Gold G2 instruments.
•POWER/MUTE BUTTON (A): OperatesPOWER andMUTE
features and exit menu items.
•TICK/MENU BUTTON (B): Operates theTick RateControl,
Bar Hole Test and to enter, change and select menu items.
•SAVE/ZERO BUTTON (C):Use forsavedata feature,
manually zero sensors, scroll and change menu items.
5

6
Combustible Gas Sensor
All Sensit®Gold G2 instruments incorporate a highly sensitive
and uniquely designed semiconductor sensor. The function and
accuracy of the sensor are monitored and controlled by special-
ized circuitry and a microprocessor. This sensor is capable of
measuringconcentrationsofaslowas1ppmmethaneupto100%
LEL.Whenequippedwiththepercentvolumesensor,concentra-
tionsabove70%LELaremonitoredormeasuredsimultaneously
withastate-of-the-artthermalconductivitysensor(TC).Thissen-
sor is capable of measuring high concentrations of gas quickly
and accurately. All readings are automatically switched between
thescales ofPPM (if soequipped), LELand percentvolume.
Electrochemical Sensors (optional)
All Sensit®Gold G2 instruments when equipped with the
following optional sensors, microprocessor and associated
circuitrywillmeasureoxygenlevelsfrom0-25%,measurecarbon
monoxide(CO) levelsfrom 0-2000ppmandmeasure hydrogen
sulfide(H2S)levels from0-100ppmor hydrogencyanide(HCN)
levelsfrom0-30ppm.Allgases aredisplayedsimultaneouslyon
the display.
The Pump
TheSensit®Gold G2instrumentsare equippedwithapowerful
and efficient pump. Awater/dirt filter at the end of the goose-
neck protects the pump from foreign material.An additional in-
ternal filter also helps to protect the pump from damaging de-
bris. There are audible and visual indicators that will show a
blockedor improperlyoperating pump.
SENSORTYPES AND PUMPS
(Continued on page 7)
BATTERYINSTALLATION/REPLACEMENT
Abattery strengthicon islocated atthe lowerright cornerof the
display which indicates the approximate battery capacity. Bat-
tery replacement is necessary when the display icon displays
an empty battery silhouette and flashes a countdown timer in
seconds indicating the maximum time before instrument shut
down. This timer begins at 300 seconds and decreases to 0.
Duringthe lowpower indicationsthe greenLED willflash and a
warningbeepwill besounded.Priorto shutdownthedisplay will
show BAT LOW in the main display.
WARNING:Always change batteries in an environment
free of combustible gases.
Removethebatterysleevecoverbyremovingtheretainingscrew
(#10Torx). Depressingthe lockingtabonthe frontof thehandle
withacoin orflatobject andpull the handleaway fromthetop or
displayarea of theinstrument.
NOTE: Observe the polarity markings on the inside of the
battery holder. Instrument will not operate with improp-
erly installed batteries.
WARNING: Never mix batteries of different type or age.
Place three (3) approved batteries into the battery holder. For
best results hold the battery compartment so that it lays in one
of your hands. With your other hand slide the first battery with
the negative (-) contact toward the battery spring. Insert the
SENSOR TYPES AND PUMPS continued
NOTE: Operating the instrument without a sensor cap or
with an altered sensor cap can cause damage to the in-
strument and void the warranty.
7
(Continued on page 8)

8(Continued on page 9)
OPERATIONANDUSE
CAUTION: Always start any Sensit®Gold G2 in a gas
free environment to insure a proper zero.
1. Push the POWER/MUTE BUTTON (A) until the instrument
beeps and the display illuminates. Each of the following will be
displayed.
a. SensitTechnologiesLogo
b. System check that includes:
i. LED check
ii. Backlight check
iii. Memory check
iv. Pump check
v. Battery check
vi. Microprocessor check
vii. Pressure sensor check
viii. Clock check
ix. Auto Log Check (alert at 50 records remaining
before memory is full and overwrites)
c. Display all active sensors
d. Display“SENSIT GOLDG2,Configuration Numberand
Softwarerevision”.
BATTERYINSTALLATION/REPLACEMENTcontinued
remaining batteries in the same direction. The last battery will
contactthepositive (+)tabat theend ofthe holder. Ifyou donot
useoneof yourhandsto hold thebottomof thebatterycompart-
ment the batteries may come out.
Replace the battery sleeve and allow the locking tab to snap
intoposition. Replaceand securethe retainingscrew. Checkto
be sure the handle is secure to the instrument body by firmly
pullingthe handleaway.
9
(continued on page 10)
OPERATION AND USE continued from page 8
e.Dateand Time
f. GasType(indicating type ofcalibration gas)
g.Serial Number
h. Cal Due or Next Cal (up coming)
i. Sensor Warm Up and Please Wait
j. Autozero (all gases and pressure sensor)
k.Auto Bump Test (optional)
l. Working display showing all gases sensed and battery
powerremaining
2. If the display fails to illuminate or BAT LOW is shown on the
display, replace the batteries.
3. Ifanysensoris pasttheintendedcalibrationcycle, CAL DUE
will appear during the start-up sequence. The instrument will
also show which sensor is due for calibration at that time.
During“Autozero” allsensors willbe displayed withthe zeroing
result(passed orfailed).
4. If after the warm-up period, the instrument determines that
a sensor is inoperable, an ERROR message will flash for
that sensor. Then FAIL will show on the display for the corre-
sponding sensor. Attempt to manually zero using
SAVE/ZEROBUTTON(C).
5. The display will indicate the type of gas used for calibration
(i.e. Nat or Pro) and the unit of measure (i.e.: LEL, PPM, %
VOL)below allreadings.

10 (continued on page 11)
OPERATION AND USE continued from page 9
If PPM display is selected, the measurement auto-ranges to
LELatlevels above2000ppm.When equippedwiththeoptional
percentvolume sensorthe measurementauto-ranges at100%
LEL. The display will indicate by changing the unit of measure
belowthereading to“%v/v”.
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 supplied with each
instrument. During pump flow block, a beep will occur every 2
seconds and the green LED will flash until adequate flow is
present.
7. It may be necessary to manually zero the instrument based
on company practices and environmental conditions. Always
zerothe instrument ina cleanair environment.
8. Whentesting areaswith elevatedtemperatures such asap-
plianceventsor flues,alwaysattach theoptionalhotair probeto
the end of the sensor cap. These connections need only be
fingertight.Failure tousethe approvedprobecanresult indam-
ageto the instrument andmay void thewarranty.
CAUTION: Do not handle the steel portion of any hot
air probe after use as burns may occur!
9. When sampling high areas or overhead lines the use of the
optionalextensionadapter willallow a broomhandle orpainters
stick to extend the instrument to the area where sensing must 11
OPERATION AND USE continued from page 10
(continued on page 12)
be accomplished. This adapter slides onto the battery sleeve
and is held in place by the locking nut assembly.
10. When sampling the appropriate sensors will cause the dis-
playtoupdate whenagas isencountered.Additionally,ifa com-
bustible gas is encountered a series of LEDs on the front
ofthe instrumentwill illuminatewhen thepreset concentrations
arereached. Ifany alarmconditionexists forany sensor,based
ontheir presetalarm points,the red(HAZARD 3) LED will flash
and the alarm will sound unless it is muted.
Additionally, the reading for the gas exceeding the alarm set
point will also flash.
The standard factory preset LED indicators and alarm points
are:
a.Combustiblegas: Methane,audioand visualalarmindicators
from 5% LEL to 100% LEL.
i. Green LED/Ready = 0% - 4.9%LEL Methane
ii. Amber LED/Low = 5% - 9.9%LEL Methane
iii.Red LED/Haz1 = 10.0% - 24.9% LEL Methane
iv. Red LED/Haz2 = 25.0% - 49.9% LEL Methane
v. RedFlashing LED/Haz3
METHANE: 50% LEL Methane to 17% volume* Methane
(LED indicator only above 17% volume Methane)
PROPANE:50% LELPropane to12% volume* Propane
(LED indicator only above 12% volume Propane)
*Whenequipped withpercentvolume sensor.
b.Oxygen - below 19.5% andabove 23.5%

12
OPERATION AND USE continue from page 11
(continued on page 13)
c.Carbon Monoxide -35ppm per utilityindustry standards
d.Hydrogen Sulfide-10ppm andaboveper FederalOSHA
guidelines
e. HydrogenCyanide -5ppmand above
Caution: There are gases that can poison or be cross
sensitive to the combustible gas sensor. Contact SENSIT
Technologies for cross-sensitivity information.
11. To disable the alarm, quickly press the POWER/MUTE
BUTTON(A).To enablethe alarmpress thesamebutton again.
During an alarm the gas that has exceeded the preset alarm
point will flash on the display and the HAZARD 3 LED will flash
indicatinga potentiallyunsafecondition. Whencombustiblegas
readings exceed the alarm range, all LEDs (except green and
redHAZ3)will turnoff.Ifthe alarmconditionnolonger exists,the
alarm sound will activate if a new alarm condition is encoun-
tered.
12.Toassist inlocating smallleakspress andrelease theTICK/
MENUBUTTON(B).TheSELECTTESTTICKisdisplayed.Push
theTICK/MENU BUTTON(B) to activatethe tick.
Upon activation a tick can be heard and a full bar graph is dis-
played.As the sensor head is moved toward a leak source the
tick will increase. At any time press the TICK/MENU BUTTON
(B) to reset the speed of the tick to the slow, steady rate. The
bargraph willdecrease in sizeindicating adecreasing rangeof
tick rate sensitivity. Each bar division (there are 5) represents
approximately5000ppmmethane.
13
OPERATION AND USE continue from page 12
MENU BUTTON (B) to reset the tick so that is audible.
Pressing the POWER/MUTE BUTTON (A) disables the tick
NOTE: Whenever possible use the instrument prior to us-
ing a leak detection solution.
13. At any time the operator may save the readings on the
display by pressing the ZERO/SAVE (C) button. This will save
allreadings fordownload at alater time.The memoryis factory
setto storeevents. Thiscan be adjustedfrom 1-100at the fac-
tory.Themost recent saveis firstduring download.An optional
Auto log software of extended memory can store up to 1,600
records.(Consult factoryfor details.)
14.FollowingFederal, State,Municipaland/orCompanyproce-
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
confinedspaces orflues.During sampling,the respectiveread-
ings may change.Audible and visual alarms will activate when
the preset limits are reached.
15. When equipped with the percent volume sensor, if the in-
strument encounters a gas it is not calibrated to, it may read
“NSR” or “NSC” followed by a number. If the instrument is cali-
brated for natural gas “NSR” (Non Standard Response) likely
indicates a heavy non combustible gas (i.e.: heavier than air,
such as carbon dioxide, etc.). If the response is “NSC” Non
Standard Combustible) the gas is likely a heavy hydrocarbon,
such as gasoline, propane, butane, etc. If the instrument is
(continued on page 14)

14 (continued on page 15)
To assist pinpointing the location of underground leaks the Bar
Hole Test feature may be used. This feature will draw a timed
sample (45 seconds) and display sustained and peak readings.
NOTE: Use an approved barhole probe with filter to pre-
vent damage to the instrument when conducting bar hole
surveys.
To Conduct a BAR HOLE Test:
Prior to the test, attach the approved bar hole probe to an oper-
ating instrument. Block the inlets of the probe to test for any air
leakage. The instrument will show FLOW BLOCKED in approxi-
mately 10 seconds if all seals are good. If flow block is not
detected, check the integrity of the “O” ring seals and connec-
tions on the probe and instrument. If flow block can not be
achieved, contact the factory for assistance. An air tight system
is crucial for accurate readings.
From the working display, press & release the TICK/MENU BUT-
TON (B). SELECT TEST will appear on the top line of the
BAR HOLE TEST (Forpercent volumeequipped unitsonly)
OPERATION AND USE continue from page 13
calibratedforpropane, “NSR”likelyindicates gaslighterthan air
such as helium . “NSC” may indicate methane, hydrogen or
naturalgas.
16. When being used in dark areas an automatic backlight will
illuminate the display.
17.To turn instrumentoff,press/hold thePOWER/MUTE BUT-
TON (A) until the beeping sound stops and POWER OFF ap-
pears on the display. Release the button and shut down will
occurafter the purgetime.
BAR HOLE TEST continued from page 14
display. Press SAVE/ZERO BUTTON (C) to BH Test. Press &
release TICK/MENU BUTTON (B) to enter the BH menu. Insert
the bar hole probe into the location for the survey. Press and
release TICK/MENU BUTTON (B) once more to start the test. A
45 second countdown for the test will begin. The current percent
of gas by volume detected will be displayed on the left. The peak
percentof gasby volume detected will bedisplayed onthe bot-
tom.At theconclusion ofthe test,the pumpwill shutoffand any
sustainedand peakreadings willbe shownand recorded.
If you have another test to take, press & hold the SAVE/ZERO
BUTTON(C). Thiswill restartthe pumpand clear thelast read-
ings. When the readings have returned to zero, release SAVE/
ZEROBUTTON (C).Thecountdown timerwill restart.
You may encounter NSR or NSC readings during the bar hole
test (see page 12 for definition). Changing the GAS TYPE, a
selection in the USER MENU may help to identify a question-
able vapor.Ahydrocarbon filter kit is available to help screen if
contactwith heavy hydrocarbonsis suspected.
Please consult the factory for details. If you wish to cancel dur-
ing a test or return to the working display, press & release the
POWER/MUTEBUTTON(A).
15
CALIBRATIONCHECK
To verify the accuracy of any Sensit®Gold G2, it must be ex-
posed to a known concentration of test gas that will test any
sensorcombination includedin your particularmodel.
Any sensor that does not meet the specifications listed in this
manualmay require calibrationor repair. Acalibration check
(continued on page 16)

16 (continued on page 17)
CALIBRATION CHECK continued from page 15
does not update the calibration due date. Full calibration is re-
quired to update these times.
A CAL DUE message will illuminate during warm-up if calibra-
tion has not been performed per your company specified inter-
val. Any time it is suspected that the Sensit®Gold G2 is not
workingproperly, checkcalibration.
The Sensit®Gold G2 has several categories within the User
Menu.Thefirst ninefieldsarestandard withallinstruments. The
lastthree are onlyavailable in certaininstrument models when
orderedwith theExtended Memoryoption.
SHOW TIME: Displays current date and time. (Cannot be
changedfrom thislocation.)
SET CLOCK: Set date and time. Displayed using a 24 hour
clock.(User adjustable)
PRINT: Print Session Logs, Cal Log, access Smart-Cal com-
munication,(print CO testor printCF test isoptional withsome
extendedmemory units).
BUMP TEST: Perform automatic test for sensors response to
calibration gas within 60 seconds or less.
CAL: Perform sensor calibrations either manually or using
docking station.
O2 TEST: 20 second test to check depletion of the O2 sensor
when exposed to the proper gas, such as 100% methane.
GAS TYPE: Selectnatural/methane orpropane asprimary gas
to be sensed.
MENU
17
(continued on page 18)
MENU continued from page 16
CAL LOG: Display last calibration of all sensors.
SES LOG: Displaysaved gas readingswith thecorresponding
date and time.
SMART-CAL: Prepareforuse oncalibration station.
CAL DUE: Displaysfuture duedates forcalibration.
SHOW BH LOG: Displaythe resultsfrommost recentBH tests.
Standard LOG size is 6 events but up to 100 records can be
stored per session, BH Test, CO Test and CF test.
NOTE: These additional fields are found on certain mod-
els ordered with the Extended Memory option.
AUTOLOG: Automatic storage of peak gas readings of up to
1,600events.
SHOWCO TEST:DisplayCOlevels recordedduringtimedtest.
SHOW CF TEST: Display calculated AIR FREE CO levels re-
cordedduring timed test.
SHOW TIME
From the working display, access the menu by pressing and
holding the TICK/MENU BUTTON (B) until the display reads
USER MENU/SHOW TIME. Press TICK/MENU BUTTON (B)
one time to display the time and date. Press any button to re-
turn to the USER MENU.

MENU continued from page 17
(Continued on page 19)
18
SETCLOCK
From the working display access the menu by pressing and
holding the TICK/MENU BUTTON (B) until the top line reads
USER MENU/SHOWTIME. Press & release the SAVE/ZERO
BUTTON(C) to scroll toUSER MENU/SETCLOCK.
Pressthe TICK/MENUBUTTON (B) toselect thisfeature. The
dayofthe monthwillflash. UsetheTICK/MENUBUTTON (B)to
changethedate.Using the SAVE/ZEROBUTTON(C) willscroll
tothe nextitem tochange. Pressthe POWER/MUTEBUTTON
(A) to save the changes and return to the USER MENU.
PRINT
Fromthe workingdisplay access themenu bypressing &hold-
ingthe TICK/MENUBUTTON(B) untilthetop lineof thedisplay
readsUSERMENU/SHOWTIME.Pressthe SAVE/ZEROBUT-
TON(C)toscrolltoUSERMENU/PRINTMENU.PresstheTICK/
MENUBUTTON (B)to selectthis feature.PRINT MENU SESS
LOG will be displayed and the pump will turn off. Press the
SAVE/ZEROBUTTON(C)to scrollto thetype ofreport toprint.
Prepareand aligntheprinter.UsetheTICK/MENU BUTTON(B)
to begin the printing. Do not block or interfere with the line of
sightbetween theprinter andthe instrument duringthe printing
time.Press POWER/MUTEBUTTON(A) toreturn totheUSER
MENU. The pump will also restart.
19
MENU continued from page 18
(Continued on page 20)
BUMPTEST
Prior to starting this test, prepare the necessary gases per
thesensor configuration.
Fromtheworking display,pressingand holdingtheTICK/MENU
BUTTON(B)until thedisplayreads USERMENUSHOW TIME.
Press the SAVE/ZERO BUTTON (C) to scroll to USER MENU
BUMPTEST.Press theTICK/MENUBUTTON(B) toselect this
feature.
Attachthe preparedgas. Duringthetest thegas type,the target
concentration, the time remaining in seconds and actual con-
centration will be displayed. After each gas is tested PASS or
FAILED willbe displayed.It is notpossible tomanually stop the
test once it is started. At the end of the test BUMP TEST
(PASSEDorFAILED)willbeindicated.PressthePOWER/MUTE
BUTTON(A) to return to theUSER MENU.
SMART-CAL
Fromtheworkingdisplay, press&holdthePOWER/MUTEBUT-
TON (A) for 2-3 seconds. The display will read SMART CAL
communicating.
Placetheinstrument intothe cradleonthe leftsideof theSmart-
CalCalibration Station.Attachthe tubingfrom thestationto the
instrument.
Press & release the CALIBRATE button on the Smart -Cal and
calibrationwillbegin automatically.Ifsuccessful,CALIBRATION
PASSEDwill showon display.If unsuccessful,CALIBRATION

MENU continued from page 19
20 (Continued on page 21)
FAILED will show. Let the instrument clear and repeat the cali-
bration process. If the instrument will not pass, remove the in-
strument from service. Consult the factory in the event of any
failure.
CAL
SeeCalibration sectionon page 28.
O2 TEST
Prior to starting this test prepare the necessary gas (either
100% nitrogen or 100% methane)
From the working display press & hold the TICK/MENU BUT-
TON (B) until the display reads USER MENU SHOW TIME.
Press the SAVE/ZERO BUTTON (C) to scroll to USER MENU
O2TEST.
Press the TICK/MENU BUTTON (B) to select this feature. At-
tach the prepared gas. During the test, the time remaining in
seconds will be displayed. It is not possible to manually stop
the test once it is started. At the end of the test O2 TEST
(PASSED or FAILED) will be indicated. Pressing the POWER/
MUTEBUTTON (A)to return tothe USERMENU.
GASTYPE
Fromthe workingdisplay access themenu bypressing &hold-
ingthe TICK/MENUBUTTON (B)until thedisplay reads USER
MENUSHOW TIME.
PresstheSAVE/ZEROBUTTON(C)untilthedisplayreadsUSER
21
MENU continued from page 20
(Continued on page 22)
MENU GAS TYPE. Press the TICK/MENU BUTTON (B) to se-
lect this feature. Press the TICK/MENU BUTTON (B) to select
NAT for methane based calibration readings. Using the SAVE/
ZEROBUTTON (C)will selectPRO for propane based calibra-
tion readings. Press the POWER/MUTE BUTTON (A) to save
the changes and return to the USER MENU.
CALLOG
From the working display access the menu by pressing and
holding the TICK/MENU BUTTON (B) until the display reads
USER MENU SHOW TIME. Press the SAVE/ZERO BUTTON
(C) to scroll to USER MENU CALLOG. Press the TICK/MENU
BUTTON(B) to selectthis feature.
Theheading willdisplayCALDATE andthelast successfulcali-
bration of each sensor will be displayed. Press the POWER/
MUTEBUTTON (A)to return tothe USERMENU.
SES LOG
From the working display access the menu by pressing and
holding the TICK/MENU BUTTON (B) until the display reads
USER MENU SHOW TIME. Press the SAVE/ZERO BUTTON
(C) to scroll to USER MENU SES LOG. Press the TICK/MENU
BUTTON(B)toselect thefeature.Theheadingwilldisplay SES-
SION:XXX (indicatingrecord number) andthe date/timeof the
record. Below will include the recorded concentrations of each
sensorinstalled.TheSAVE/ZERO BUTTON(C) advancesto

MENU continued from page 21
22
thenextrecord whilepressing theTICK/MENUBUTTON (B)re-
turnsyoubacktothe previousrecord.Pressthe POWER/MUTE
BUTTON(A) to return to theUSER MENU.
NOTE: The following additional menu items can be only
found on certain models ordered with the extended
memory option.
SHOW CO LOG
From the working display access the menu by pressing and
holding the TICK/MENU BUTTON (B) until the display reads
USER MENU SHOW TIME. Press the SAVE/ZERO BUTTON
(C) to scroll to USER MENU SHOW CO LOG.
Press the TICK/MENU BUTTON (B) to select this feature. The
lasttwo recordswillbe displayed.The heading willdisplay SES:
XXX(indicating recordnumber)and thedate/time ofthe record.
Below will include the recorded peak (PK) and sustained (ON)
concentrations.
TheSAVE/ZEROBUTTON(C)advancestothenextrecordwhile
pressing the TICK/MENU BUTTON (B) returns you back to the
previousrecord. Press the POWER/MUTEBUTTON (A) tore-
turn to the USER MENU.
SHOW CF LOG
From the working display access the menu by pressing and
holdingthe TICK/MENUBUTTON (B)until thedisplay reads
(Continued on page 23) 23
USER MENU SHOW TIME. Press the SAVE/ZERO BUTTON
(C) to scroll to USER MENU SHOW CF LOG.
PressTICK/MENU BUTTON (B)to selectthis feature. Thelast
two records will be displayed. The heading will display SES:
XXX(indicating record number)and thedate/timeof therecord.
Below will include the recorded concentrations of each sensor
installed.
TheSAVE/ZEROBUTTON(C)advancestothenextrecordwhile
pressingthe TICK/MENU BUTTON(B) returnsyou back to the
previous record. Press the POWER/MUTE BUTTON (A) to re-
turn to the USER MENU.
SHOW BH LOG
From the working display access the menu by pressing and
holding the TICK/MENU BUTTON (B) until the display reads
USER MENU SHOW TIME. Press the SAVE/ZERO BUTTON
(C) to scroll to USER MENU SHOW BH LOG.
PressTICK/MENU BUTTON (B)to selectthis feature. Thelast
recordwill be displayed.The headingwilldisplay BHLOG: XXX
(indicatingrecord number) andthe date/timeof the record. Be-
lowwillinclude therecorded(PK) and(ON)concentrations. The
SAVE/ZERO BUTTON (C) advances to the next record while
pressingthe TICK/MENU BUTTON(B) returnsyou back to the
previous record. Press the POWER/MUTE BUTTON (A) to re-
turn to the USER MENU.
MENU continued from page 22
(Continued on page 24)

24 (Continued on page 25)
MENU continued from page 23
AUTOLOG
AUTOLOG(Automatically included with every unitthat hasthe
optionalCFTest feature)
From the working display access the menu by pressing and
holding the TICK/MENU BUTTON (B) until the display reads
USER MENU SHOW TIME. Press the SAVE/ZERO BUTTON
(C) to scroll to USER MENU AUTO LOG. Press TICK/MENU
BUTTON(B) to selectthis feature.
The heading will display SES: XXX (indicating record number)
andtheTYPEof record(automaticormanually saved).Beneath
the heading will include the date of the session, start/stop time
andthe recordedconcentrations of eachsensor installed.
TheSAVE/ZEROBUTTON(C)advancestothenextrecordwhile
pressingthe TICK/MENU BUTTON(B) returnsyou back to the
previousrecord.Pressthe POWER/MUTE BUTTON(A)tosave
the changes and return to the USER MENU.
Withthis featuretheinstrument willautomaticallysave thepeak
readingsof allsensors whilethe unitis operatingin theworking
display.Thesepeak readings are storedin Eventswith a maxi-
mumcapacity of1,600 events. Theyare storedaccumulatively
throughout day to day use until the maximum capacity is
reached.Each use ofthe SAVE/ZEROBUTTON(C) tomake a
manualsave willalso recordoneevent.
25
(Continued on page 26)
MENU continued from page 24
To RetrieveAutolog Events:
Stored autolog events can be downloaded to a PC using the
serial port computer interface IR Link. Please contact the fac-
tory for more information on this accessory.
CALDUE
From the working display access the menu by pressing and
holding the TICK/MENU BUTTON (B) until the display reads
USER MENU/SHOW TIME. Press the SAVE/ZERO BUTTON
(C) to scroll to USER MENU/CAL DUE.
Press the TICK/MENU BUTTON (B) to select this feature. The
headingwill displayCAL DUEifthe sensoris pastcalibration or
NEXTCALindicatingwhenthesensorisdue.PressthePOWER/
MUTEBUTTON (A)to return tothe USERMENU.
CONDUCT / SHOW /PRINT CF TEST
Only available as an option for instruments with CO and
O2 and the extended memory feature.
To Conduct a CF Test
NOTE: The hot air flue probe must be used with the instru-
ment when conducting this test to prevent damage to the
instrument and to receive proper calculations.
IMPORTANT: Air free CO levels or CF readings are calcu-
lated by the instrument based on CO and O2 levels (below
18.9%) detected during flue gas sampling of gas fired appli-
ances.

26 (continued on page 27)
MENU continued from page 25
From the working display, press & release TICK/MENU BUT-
TON(B) once, SELECTTEST will appear on thetop line ofthe
display.Press &release theSAVE/ZEROBUTTON(C) untilCF
is displayed. Press & release the TICK/MENU BUTTON (B)
again and the instrument will auto-zero and then enter the CF
testmenu.Press & releasethe TICK/MENUBUTTON (B) once
more to start the test.
NOTE: Usingthe SAVE/ZEROBUTTON(C) mayadvance you
toanother testoption dependingon the instrumentversion.
A 180 second timed test will begin. (The time for this test is
factoryadjustable.) Acountdowntimer willshow theremaining
seconds of the test. The peak CF reading will start to flash “O
PK” in the lower right. 20 seconds after the oxygen level drops
below18.9% indicatingthepresence offlue gasthe PKreading
willno longerflash.AcontinuousCO readingis displayedin the
upper left and the sustained CF reading is in the upper right.
It will continue to flash until 20 seconds after the oxygen level
drops below 18.9%.At this point, conditions are acceptable for
a valid test calculation.
If this segment continues to flash during the test period,
conditions for a proper test were not possible. In this case
any test results are invalid. The display and printout will
show N/A for the peak CF reading. The test should be re-
peated.
MENU continued from page 26
27
Ifthe properconditionfor anaccurate testexisted,the detected
COlevel, calculatedCF leveland thepeak CFlevel will remain
on the display at the end of the test.
TheCF readings areautomatically recordedby the instrument
and can be viewed at a later date. In addition, the peak CF
readingwill bestored for aprintout report.
Press & release the TICK/MENU BUTTON (B) to repeat the
test.Press& releasethePOWER/MUTE BUTTON(A)to return
to the working display.

28 (Continued on page 29)
Calibration
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
roomenvironment freeof combustible,CO andH2S gases.
Manually zero the instrument prior to beginning the calibration
process.
NOTE: Using calibration kits other than recommended by
SENSIT TECHNOLOGIES may cause inaccurate readings.
Repairs are required if any sensor fails to calibrate. Con-
sult SENSIT TECHNOLOGIES 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.
These readings will update every 5 seconds during cali-
bration.
Definitions
• AUTO CAL is an automatic calibration process not
requiringa dockingstation.
• 2.5% V/V is the calibration point for the low end of the
100%volumesensor.
CALIBRATION
29
CALIBRATION continued from page 28
• 50% LEL indicates calibration of the LEL and PPM
sensors.
• 100 PPM CO indicates the calibration point of the carbon
monoxidesensor.
• 25 PPM H2S indicates the calibration point of the
hydrogensulfidesensor.
• 10 PPM HCN indicates the calibration point of the
hydrogencyanide sensor.
•SMART-CAL isthe automatic calibrationsystem usingIR
communication.
Priortostartingcalibrationpreparethenecessary gases per
thesensor configuration.
From the working display access the menu by pressing and
holding the TICK/MENU BUTTON (B) until the display reads
USER MENU SHOW TIME. Press the SAVE/ZERO BUTTON
(C) to scroll to USER MENU CAL .
Press the TICK/MENU BUTTON (B) to the calibration modes.
Thedisplay will nowshow CALAUTOCAL.Pressing the SAVE/
ZEROBUTTON (C)will allowviewingof allother modesof cali-
bration.
(Continued on page 30)

30 (Continued on page 31)
CALIBRATION continued from page 29
AUTO CAL automaticallycalibrates theinstrument toall gases
detected by the sensors installed. From theAUTO CALmenu,
press the TICK/MENU BUTTON (B) .Attach the prepared gas
as listed on the display.A countdown timer shows the time re-
maining to connect . Failure to connect will result in a FAIL
message and an alarm sound (press any button to continue).
Duringthe test, thegas type, thetarget concentration and digi-
tal output of the sensor (not concentration) will be displayed.
Followingeach gastested PASS orFAILED willbedisplayed. It
is possible to manually stop the test once it is started by press-
ingthe POWER/MUTEBUTTON(A).
At the end of the test CALAUTO CALwill be indicated. Press-
ing the POWER/MUTE BUTTON (A) will save the results and
return to the USER MENU.
Pressing the SAVE/ZERO BUTTON (C) will scroll through the
individualsensors thatare configured inyour G2for calibration.
Pressing the TICK/MENU BUTTON (B) selects the option. At-
tach the proper gas and wait for the instrument to provide a
PASS or FAILED indication.
Ifthe calibrationhas failedpress the TICK/MENU BUTTON (B)
toattempt again orscroll tothe next gas.Upon successfulcali-
bration the calibration due date reminder is automatically up-
dated.
31
CALIBRATION continued from page 30
From this menu pressing the SAVE/ZERO BUTTON (C) again
will provide access to the SMART-CAL automatic calibration
system.Pressing theTICK/MENUBUTTON(B) fromSMART-
CAL menu begins the communication process. Consult the
SMART-CALsystem instructions for connection details.
NOTE: A calibration failure is indicated on the display by
FAILED. Re-calibration should be attempted. Any instru-
ment that does not accept calibration should be taken out
ofservice. Please contactSENSIT TECHNOLOGIES forany
needed repairs.

32
EXPERTMENUFEATUREDEFINITIONS
CONTRAST: Set display contrast for better viewing
TICK: Set normal speed of tick rate when resetting
%LEL MODE: Set to LEL display. If off readings are %V/V
100% LEL: Set the value of LEL between 4-5% methane
LEL RESOLUTION: Set reading increments on display
NEW O2: Tracks install date
N COMP: Specialized sensor compensation software
CAL DUE REMINDER: Alert system for calibration
DUE ACK: Requires operator to push a button when cal is overdue
PROPANE 100%: Requires calibration to 100% propane
N2 for O2: Requires oxygen test using N2
SHOW SES LOG: Show the session log on display
SHOW BH LOG: Show bar hole test logs on display
SHOW CF/CO LOG: Show CO and CF test logs on display
ALARM SETTINGS: Limits for alarms
LOW LED: Concentration when first LED illuminates
POWER OFF: Automatic shut off time
PURGE TIME: Run time before instrument shut down after power off
BH TIME: Adjustment for the bar hole test time
CF/CO TIME: Adjustment for the CO test time
ERASE AUTO: Erase theAUTO LOG
NG FACTOR: Factor for methane content in 100% natural gas
NSR: Disable gas distinguishing software
NSC: Disable combustible/inert identifier
NSC LEL: Concentration to activate NCS control
AUTO BUMP: Enable required bump test
TICK FIRST: Position of tick in test menu
MUTE LATCH: If in mute, unit can remain until reactivated
ERASE LOG: Erase all sessions, BH, CO, CF Logs
CAL RQD: Set instrument to shut down after “Cal Past Due”
33
EXPERTUSERFEATURECHART
*OPTIONAL