Sensit GOLD G2 User manual

851 Transport Drive • Valparaiso, IN 46383 (USA)
Phone: [phone] • www.gasleaksensors.com
Gas Detection Instrument
⚠Warning:
To prevent ignition of ammable or combustible
atmospheres, disconnect power before servicing.
INSTRUCTION MANUAL
SENSIT®GOLD G2
Read and understand
instructions before use.
For use with combustible gases and optionally available
oxygen and toxic gases.
II 2 G
0891
Ex ib IIB T3
AEx ia IIB T3
IP54
ATEX Cert. No. TRAC11ATEX21304X
Intrinsically Safe for Use in
Class I, Groups C and D, T3
Hazardous Locations
Listed UL 913

⚠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 uctuation 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 concentrations beyond
LEL for longer than 5 minutes always perform a calibration check prior
to the next use.
FOR YOUR SAFETY
NOTICE: ⚠CAUTION: This safety symbol is used to
indicate a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
ii

iii
⚠Warning: To reduce the risk of ignition of a ammable atmosphere,
batteries must only be changed in an area known to be nonammable.
⚠Warning: Use only DURACELL® PROCELL, Type PC1400
Alkaline Batteries
⚠Warning: Do not mix batteries of different age or type.
⚠Warning: Not for use in atmospheres of oxygen greater than 21%.
⚠Warning: ONLY zero 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-ammable.
FOR YOUR SAFETY
NOTICE: ⚠CAUTION: This safety symbol is used to
indicate a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.

4
CONTENTS
Preparation
For Your Safety .......................................................... ii-iii
Table of Contents....................................................... 4-5
SENSIT® GOLD G2 Models (Sensors Included) ..........6
Parts and Accessories ...................................................7
General Description ................................................... 8-9
Specications ..............................................................10
Product Features ....................................................11-13
Sensor Types and Pumps ...........................................14
Basic Operation
Battery Installation/Replacement .................................15
Operation and Use ................................................ 16-22
Bar Hole Test ......................................................... 23-24
Leak Search Mode (Optional)......................................25
Purge Mode (Optional) ................................................26
Working Display Peak Readings (Optional) ................27
CO Test (Optional) .......................................................28
Calibration Check ........................................................29
User Menu
User Menu / Function Descriptions ....................... 30-31
Show Time, Set Clock .................................................32
Print .............................................................................33
Bump Test ....................................................................34
Cal, O2 Test .................................................................35

CONTENTS
User Menu
Gas Type .....................................................................36
Calibration Log: Show and Print Calibration Log .........37
Session Log: Show and Print Session Log..................38
BH Log, SMART-CAL ..................................................39
Cal Due, Auto Log .......................................................40
CF Test: Show, Print Test Results ......................... 41-43
Calibration
Calibration Overview, Denitions .................................44
Calibration Auto Cal ............................................... 45-46
Carbon Monoxide (CO) Calibration .............................47
Hydrogen Sulde (H2S) Calibration ............................48
Hydrogen Cyanide (HCN) Calibration .........................49
Methane Calibration (50% (2.5%) LEL Methane) .............50
Methane Calibration (100%) ........................................51
Propane Calibration (1.1%) or (50% LEL) ...................52
Oxygen Sensor Test ....................................................53
Advanced Settings
Expert Menu Feature Denitions ........................... 54-55
Expert User Chart .................................................. 56-57
Warranty ....................................................... Back Cover
5

6
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 • • • • •

7
PARTS AND ACCESSORIES
Standard Accessories (Included)
872-00001 Hard Carrying Case
360-00040 Wrist Strap
870-00018 Extra Sensor Cap with O-Rings
360-00105 T10 Torx Wrench
750-00039 Instruction Manual
310-00004 3”C” Alkaline Batteries
883-00036 2 Piece Polycarbonate Probe Assembly
Accessories and Replacement Parts
870-00018 Sensor Cap with “O” Rings
870-00012 Extension Adapter
873-00016 Hydrocarbon Filter (1)
883-00023 Hot Air Probe Assembly
883-00021 32” Heavy Duty Fiberglass Probe
883-00015 Conned Space Probe with Tubing
883-00019 32” Fiberglass Probe
873-00013 Inline “Mini” Hydrocarbon Filter (1)
883-00018 30” Brass Probe
883-00030 Purge Probe
874-00001 Leak Survey Drag Tube Assembly
883-00046 Telescopic Survey Probe
870-00004 IR Printer
870-00039 IR Link Interface w/ SmartLink Software
914-00000-01 Smart-Cal Automatic Calibration Station
Calibration Kits
Contact us with instrument model number for correct Calibration Kit.

GENERAL DESCRIPTION
The SENSIT® GOLD G2 is designed to detect combustible gases,
oxygen content and toxic gases when so equipped with the available
sensors. Each model of the SENSIT® GOLD G2 provides specic
detection features based on approved sensor options. Each SENSIT®
GOLD G2 can be re-congured or upgraded by the manufacturer for an
additional charge should your sensing requirements change.
SENSIT® GOLD G2 congurations include measuring PPM, LEL and/
or % volume of combustible gases, measurement of oxygen, carbon
monoxide, and/or hydrogen sulde or hydrogen cyanide gas(es).
SENSIT® GOLD G2 instruments incorporate an advanced low power
semiconductor sensor to measure combustible gases in the LEL (Lower
Explosive Limit) range and a thermal conductivity style sensor to measure
combustible gases in the percent volume range. The user may select
either methane or propane gas readings from a user menu depending on
the sensing requirements.
An automatically backlit display shows all gas concentrations being
measured. LEDs located on the front of the instrument indicate preset
visual warnings of increased gas concentration. All gases are continuously
sampled with the use of an internal pump. Audible and visual alarms warn
the operator of hazardous conditions being sensed.
The preset alarms are indicated by a red ashing LED, display indicator
and alarm sound. The combustible gas alarm is preset for 50% LEL (2.5%
methane or 1.1% propane).
8

GENERAL DESCRIPTION
When equipped with the optional percent volume sensor, alarms remain
activated up to 17% methane (12% propane). The carbon monoxide (CO)
alarm is factory preset at 35ppm. The oxygen (O2) alarms are preset
at below 19.5% and above 23.5%. The hydrogen sulde (H2S) alarm is
preset at 10ppm. The hydrogen cyanide (HCN) alarm is set to 5ppm.
The SENSIT® GOLD G2 instrument is approved ATEX Zone 1
intrinsically safe Ex ib IIB T3 IP54 and UL CLI, Div 1 Groups C & D, T3
hazardous locations. Consult Sensit Technologies for certicate details.
APPROVED BATTERIES: Duracell® PROCELL PC1400
Per FCC Part 15, this device must accept any interference received,
including interference that may cause undesired operation.
9

SPECIFICATIONS
SENSOR SPECIFICATIONS
TYPE RESOLUTION RANGE ACCURACY
LEL 0.1% up to 2% 0-100% LEL ±10%
increments
% GAS 0.1% 5-100% METHANE ±5%
2.2-100% PROPANE
P P M 1 p p m o r 1 0 p p m 0 - 1 0 , 0 0 0 p p m ± 1 0 %
O2 0.1% 0-25% ±0.2% or 10%**
CO 1ppm 0-2000ppm ±5ppm or 5%**
H2S 1ppm 0-100ppm ±2ppm or 5%**
HCN 1ppm 0-30ppm ±2ppm or 5%**
** Whichever is greater
PRODUCT SPECIFICATIONS
Size: 11.5 x 3 x 2.3 in (292 x 76 x 59 mm)
Weight: 1.2 lb. (544 g)
Operational Temp: -4 to 104° F (-20 to 40° C)
Storage Temp: -22 to 140°F (-30 to 60° C)
Battery Life: Alkaline: approximately 18 hrs. continuous
10
II 2 G
0891
Ex ib IIB T3
AEx ia IIB T3
IP54
ATEX Cert. No. TRAC11ATEX21304X
Intrinsically Safe for Use in Class I, Groups C and D, T3 Hazardous Locations
Listed UL 913

11
PRODUCT FEATURES
LUER PROBE CONNECTOR
SENSOR CAP
LEL / PPM SENSOR
INFRARED COMMUNICATIONS
GRAPHIC DISPLAY
ALARM LEDs
OPERATION BUTTONS
WATER-RESISTANT HOUSING
FLEXIBLE GOOSENECK
BATTERY COMPARTMENT

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PRODUCT FEATURES
SENSIT® GOLD G2 instruments are constructed of durable ABS
plastic to withstand the rigors of eld use.
Incorporated in the hand grip area is the battery compartment. All
SENSIT® GOLD G2 instruments require 3 “C” type alkaline batteries.
APPROVED BATTERIES: PROCELL® PC1400 batteries provide
approximately 18 hours of use.
The tick can be easily heard with the speaker located in the back of the
instrument.
An infrared communication window is located on the right side to allow
the SENSIT® GOLD G2 instrument to download calibration data,
readings the operator has elected manually to save to the on board
memory, as well as communicate with the Smart-Cal Calibration Station
and IR Link computer interface.
A exible gooseneck is used to assist in locating the source of gas
leaks and remote sampling. A water/dirt trap is located at the end
with a convenient luer style connector to attach sampling and probe
accessories.

PRODUCT FEATURES
A graphic display continuously updates the operator of all available gas
concentrations and alarms simultaneously as well as indicates internal
functions such as air ow and battery power.
Below the display is a series of LEDs that are preset to indicate
combustible gas concentrations. The red LED on the right side will ash
during any alarm condition. In darkened environments the backlight will
illuminate in red during alarm conditions.
There are 3 operational button pads on the front of all SENSIT®
GOLD G2 instruments.
BUTTON (A) POWER/MUTE
Operates POWER and MUTE features and exit menu items.
BUTTON (B) TICK/MENU
Operates the Tick Rate Control, Bar Hole Test and to enter, change and
select menu items.
BUTTON (C) SAVE/ZERO
Use for save data feature, manually zero sensors, scroll and change
menu items.
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SENSOR TYPES AND PUMPS
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 specialized circuitry and a
microprocessor. This sensor is capable of measuring concentrations
of as low as 1ppm methane up to 100% LEL. When equipped with the
percent volume sensor, concentrations above 70% LEL are monitored
or measured simultaneously with a state-of-the-art thermal conductivity
sensor (TC). This sensor is capable of measuring high concentrations
of gas quickly and accurately. All readings are automatically switched
between the scales of PPM (if so equipped), LEL and percent volume.
Electrochemical Sensors (optional)
All SENSIT® GOLD G2 instruments when equipped with the following
optional sensors, microprocessor and associated circuitry will measure
oxygen levels from 0-25%, measure carbon monoxide (CO) levels from
0-2000ppm and measure hydrogen sulde (H2S) levels from 0-100ppm
or hydrogen cyanide (HCN) levels from 0-30ppm. All gases are displayed
simultaneously on the display.
The Pump
The SENSIT® GOLD G2 instruments are equipped with a powerful
and efcient pump. A water/dirt lter at the end of the gooseneck
protects the pump from foreign material. An additional internal lter also
helps to protect the pump from damaging debris. There are audible and
visual indicators that will show a blocked or improperly operating pump.
NOTE: Operating the instrument without a sensor cap or with an altered
sensor cap can cause damage to the instrument and void the warranty.

15
BATTERY INSTALLATION/REPLACEMENT
A battery strength icon is located at the lower right corner of the display
which indicates the approximate battery capacity. Battery replacement
is necessary when the display icon displays an empty battery silhouette
and ashes a countdown timer in seconds indicating the maximum time
before instrument shut down. This timer begins at 300 seconds and
decreases to 0. During the low power indications the green LED will ash
and a warning beep will be sounded. Prior to shut down the display will
show BAT LOW in the main display.
⚠WARNING: Always change batteries in a non-hazardous location.
Remove the battery sleeve cover by removing the retaining screw (#10
Torx). Depressing the locking tab on the front of the handle with a coin
or at object and pull the handle away from the top or display area of the
instrument.
NOTE: Observe the polarity markings on the inside of the battery holder.
Instrument will not operate with improperly 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 rst battery with the negative (-) contact toward
the battery spring. Insert the remaining batteries in the same direction.
The last battery will contact the positive (+) tab at the end of the holder.
If you do not use one of your hands to hold the bottom of the battery
compartment the batteries may come out.
Replace the battery sleeve and allow the locking tab to snap into position.
Replace and secure the retaining screw. Check to be sure the handle is
secure to the instrument body by rmly pulling the handle away.

16
OPERATION AND USE
⚠CAUTION: Always start any SENSIT® GOLD G2 in a gas free
environment to ensure 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. Sensit Technologies Logo
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 GOLD G2, Conguration Number and Software revision”.
e. Date and Time
f. Gas Type (indicating type of calibration gas)
g. Serial Number
h. Cal Due (up coming), Last Cal (if activated) or Cal Past Due
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 power remaining

17
OPERATION AND USE
2. If the display fails to illuminate or BAT LOW is shown on the display,
replace the batteries.
3. If any sensor is past the intended calibration cycle, 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” all sensors will be displayed with the zeroing result
(passed or failed).
4. If after the warm-up period, the instrument determines that a sensor is
inoperable, an ERROR message will ash for that sensor. Then FAIL will
show on the display for the corresponding sensor. Attempt to manually
zero using SAVE/ZERO BUTTON(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 all readings.
If PPM display is selected, the measurement auto-ranges to LEL at levels
above 2000ppm. When equipped with the optional percent volume sensor the
measurement auto-ranges at 100% LEL. The display will indicate by changing
the unit of measure below the reading to “%v/v”.

18
OPERATION AND USE
6. Prior to use, test the integrity of the sensor cap and tubing. Use your
nger to block the inlet of the sensor cap for 4-5 seconds. The display
will read FLOW BLOCKED if all seals are intact.
If this does not occur, change the sensor cap and “O” rings. A spare
sensor cap and “O” rings are supplied with each instrument. During
pump ow block, a beep will occur every 2 seconds and the green LED
will ash until adequate ow is present.
7. It may be necessary to manually zero the instrument based on
company practices and environmental conditions. Always zero the
instrument in a clean air environment.
8. When testing areas with elevated temperatures such as appliance
vents or ues, always attach the optional hot air probe to the end of the
sensor cap. These connections need only be nger tight. Failure to use
the approved probe can result in damage to the instrument and may
void the warranty.
⚠ CAUTION: Do not handle the steel portion of any hot air probe
after use. Burns may occur!

19
OPERATION AND USE
9. When sampling high areas or overhead lines the use of the optional
extension adapter will allow a broom handle or painters stick to extend
the instrument to the area where sensing must 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 display to
update when a gas is encountered. Additionally, if a combustible gas is
encountered a series of LEDs on the front of the instrument will illuminate
when the preset concentrations are reached. If any alarm condition exists
for any sensor, based on their preset alarm points, the red (HAZARD 3)
LED will ash and the alarm will sound unless it is muted.
Additionally, the reading for the gas exceeding the alarm set point will
also ash.

20
OPERATION AND USE
The standard factory preset LED indicators and alarm points are:
a. Combustible gas: Methane, audio and visual alarm indicators
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. Red Flashing LED/Haz3
METHANE: 50% LEL Methane to 17% volume* Methane
(LED indicator only above 17% volume Methane)
PROPANE: 50% LEL Propane to 12% volume* Propane
(LED indicator only above 12% volume Propane)
*When equipped with percent volume sensor.
b. Oxygen - below 19.5% and above 23.5%
c. Carbon Monoxide - 35ppm per utility industry standards
d. Hydrogen Sulde - 10ppm and above per Federal OSHA guidelines
e. Hydrogen Cyanide - 5ppm and above
⚠ Caution: There are gases that can poison or be cross sensitive
to the combustible gas sensor. Contact SENSIT Technologies for
cross-sensitivity information.