SENSIT Technologies GOLD G3 User manual

851 Transport Drive • Valparaiso, IN 46383 (USA)
Phone: [phone] • www.gasleaksensors.com
INSTRUCTION MANUAL
SENSIT®GOLD G3
READ AND UNDERSTAND INSTRUCTIONS BEFORE USE.
For use with combustible gases and optionally available oxygen and toxic gases.
GAS DETECTION INSTRUMENT
Intrinsically safe for use in:
Class I Div. 1
Groups C, D
Temp Classification: T4, IP64
Hazardous Locations
⚠ WARNING: To prevent ignition of flammable
or combustible atmosphere, disconnect power before
servicing.
710183
UL913

3
FOR YOUR SAFETY
⚠NOTICE: This safety symbol is used to indicate a potentially
hazardous situation which, if not avoided, may result
in minor or moderate injury.
⚠ WARNING: To reduce the risk of ignition of a flammable
atmosphere, batteries must only be changed and
charged in an area known to be nonflammable.
⚠ WARNING: Do not mix batteries of different age or type.
⚠ WARNING: Not for use in atmospheres of oxygen greater than
21%.
⚠ WARNING: Only zero the 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.
⚠ WARNING: To prevent ignition of flammable or combustible
atmospheres, disconnect power before servicing.

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CONTENTS
FOR YOUR SAFETY����������������������������������������������������� 3
QUICK START GUIDE�������������������������������������������������� 6
PRODUCT FEATURES: HARDWARE������������������������������� 7
COMBUSTIBLE GAS SENSORS ............................................................... 7
ELECTROCHEMICAL SMART SENSORS ................................................... 7
FLEXIBLE WAND AND FLASHLIGHT ........................................................ 7
RECHARGEABLE BATTERY AND CHARGING STATION.............................. 7
TWO-SPEED PUMP AND SAMPLING SYSTEM........................................... 8
LED DOME........................................................................................... 8
PRODUCT FEATURES: SOFTWARE�������������������������������� 9
WORK DISPLAY OPTIONS ..................................................................... 9
COMBUSTIBLE GAS TYPE....................................................................... 9
LEL DEFINITION.................................................................................... 10
H2S RESOLUTION................................................................................. 10
HCN RESOLUTION ............................................................................... 10
NON-STANDARD READINGS................................................................. 10
NSR .................................................................................................... 10
NSC .................................................................................................... 10
ALARMS .............................................................................................. 11
OPERATION AND USE������������������������������������������������ 12
POWER-ON AND STARTUP SEQUENCE.................................................. 13
BUMP TESTING AND CALIBRATION ....................................................... 14
THE WORK DISPLAY.............................................................................. 14
FILTER INTEGRITY AND FLOW BLOCK CHECK ......................................... 14
READY FOR USE ................................................................................... 14
POWER OFF & BATTERY CHARGING...................................................... 15
QUICK MENU TEST MODES ���������������������������������������� 16
TICK .................................................................................................... 17
BAR HOLE TEST .................................................................................... 18
CO TEST .............................................................................................. 20
PURGE TEST ......................................................................................... 22
LEAK SEARCH MODE............................................................................ 24
STANDBY MODE .................................................................................. 25
PEAK MODE ........................................................................................ 26

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INERT PURGE MODE............................................................................. 27
USER MENU �������������������������������������������������������������� 29
SET DATE ............................................................................................. 30
SET TIME.............................................................................................. 31
TIME ZONE.......................................................................................... 31
FLASHLIGHT......................................................................................... 32
BUMP TEST........................................................................................... 32
SMART SENSOR................................................................................... 33
CALIBRATION....................................................................................... 34
O2 TEST .............................................................................................. 36
GAS TYPE ............................................................................................ 37
CAL LOG ............................................................................................. 37
SESSION LOG ...................................................................................... 39
BAR HOLE LOG .................................................................................... 39
CO LOG .............................................................................................. 40
DATA LOG ........................................................................................... 40
SMART CAL ......................................................................................... 41
SMART-LINK ......................................................................................... 42
CALIBRATION NEXT DUE....................................................................... 42
BARHOLE PURGE THRESHOLD ............................................................... 42
CO PURGE THRESHOLD ........................................................................ 43
NOTES ���������������������������������������������������������������������� 44
EU WASTE ELECTRICAL AND ELECTRONIC ������������������� 47
EQUIPMENT (WEEE) DIRECTIVE ����������������������������������� 47
WARRANTY �������������������������������������������������������������� 48

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QUICK START GUIDE
1. Remove the instrument and rechargeable battery from the carrying case and install the
battery into the instrument. Secure it with the Phillips head screw. Wait 30 minutes before
proceeding to step 2.
2. Press and hold the Abutton until the instrument powers on. The LED dome will illuminate
and the SENSIT logo will be shown on the display.
3. In clean air, allow the instrument to go through the startup sequence, warmup, and Autozero. This
typically takes around 30 seconds, but if the battery was disconnected it can take up to 5 minutes.
4. An automatic ow block test may be prompted during startup. If so, place your nger over
the inlet at the end of the gooseneck and wait until the test passes. This should happen
within 5 seconds. If ow block cannot be achieved replace sensor cap and orings, contact
SENSIT Technologies for assistance.
If the automatic ow block test is not prompted during startup, perform this test after the
Autozero is complete and the work display is shown.
FLOW BLOCKED will be displayed.
NOTE: If any
FAIL messages occur during the Autozero, ensure that the instrument is in clear
air, and attempt the zero again by pressing and holding the Cbutton until
AUTOZERO is
shown on the display. Contact SENSIT Technologies if the instrument cannot pass the
Autozero.
5. The work display will be shown with gas readings.
Up to (5) total gasses can be shown: EX, CO, O2,
H2S, and HCN. If equipped with the TC sensor, the
combustible gas reading will automatically scale into
the percent volume range after the LEL range.
6. Once the work display is shown with no fail messages,
and a ow block check has been successful, you are
ready to use the instrument.
7. Following federal, state, municipal, and/or company procedures, conduct the leak
investigation, survey, or other procedures as needed. See the Operation and Use and
Quick Menu Test Modes sections in the instruction manual for detailed information.
8. If the source of an odor or known leak needs to be pinpointed, use the
TICK feature. To
enable, press and release the Bbutton to enter the
QUICK MENU . Press and release the
Bbutton again to enable TICK .
An audible ticking sound will be heard. Move the end of the gooseneck towards the area
suspected of leakage. As you get closer to the source, the tick rate will increase. Press and
release the Bbutton or roll back the thumb wheel to decrease the tick. Press and release
the Abutton to deactivate.
9. If equipped with T/C any NSC reading shown on the display indicates a “non-standard
combustible” gas has been detected.
Any NSR reading shown on the display indicates a “non-standard response”, which means
the instrument has detected a likely non-combustible gas that it isn’t calibrated for.
10. To zero out very small levels of gas, press and hold the Cbutton until
AUTOZERO is shown on
the display. This should only be done to set the instrument zero to your working environment,
(e.g. to zero out a small level of CO on a street with heavy vehicle trafc). The instrument will
not allow a zero if unsafe levels of gas are present and will show a fail message.

7
11. When your investigation is complete, press and hold the Abutton until the instrument
displays
POWER OFF SHUTDOWN.
PRODUCT FEATURES: HARDWARE
COMBUSTIBLE GAS SENSORS
All SENSIT GOLD G3 instruments incorporate the 2611 sensor, 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. The sensor is capable of measuring
concentrations as low as 1PPM methane, up to 100%LEL (5.0%VOL).
There is an additional optional combustible gas sensor called the TC sensor that increases the
capability of the instrument to measure above 100%LEL, up to 100%VOL. This state-of-the-art
thermal conductivity sensor can measure high concentrations of gas quickly and accurately.
All gas readings are automatically switched between scales of PPM (if enabled), %LEL, and
%VOL without requiring input from the operator.
ELECTROCHEMICAL SMART SENSORS
All other sensors in the SENSIT GOLD G3, if equipped, are “electrochemical” type sensors.
Options for these sensors are:
• Oxygen (O2), detectable range from 0-25% with a 0.1% resolution.
• Carbon Monoxide (CO), detectable range from 0-2,000PPM with a 1PPM resolution
• Hydrogen sulfide (H2S), detectable range from 0-100PPM with either a 1PPM (default) or
0.1PPM resolution.
• Hydrogen cyanide (HCN), detectable range from 0-30PPM with a 0.1PPM resolution.
The maximum number of available “slots” for these sensors is 3. However, detection capability
for all 4 is available (making the instrument a 5-gas detector), in which case the CO and H2S
sensors will be a combination sensor instead of individual.
FLEXIBLE WAND AND FLASHLIGHT
The combustible gas sensor for the LEL range/tick is installed at the end of the flexible wand or
“gooseneck”. This allows for extremely fast, near instantaneous reaction to gas, because there
is essentially no travel time for the gas sample. As soon as it is drawn in by the pump, the first
thing it hits is the sensor.
In addition, the wand in the SENSIT GOLD G3 is now equipped with a flashlight, made up
of individual LEDs installed on the sensor circuit board. This flashlight feature can be enabled or
disabled whenever the operator desires.
RECHARGEABLE BATTERY AND CHARGING STATION
The SENSIT GOLD G3 comes standard with a rechargeable battery pack. This battery pack
is installed in the handle of the instrument and secured with a captured Philips head screw. The
battery pack can be charged while still installed in the instrument, or when removed, with the
included battery charging station. This charging station can be semi-permanently mounted to a
table or wall, in a vehicle, or just left free standing without needing to be secured. The station
includes a set of LEDs that tell the operator the charging status.

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TWO-SPEED PUMP AND SAMPLING SYSTEM
All SENSIT GOLD G3 instruments are equipped with a powerful and efficient pump that has
two speeds, depending on what mode of operation the instrument is in. While in
BARHOLE or
LEAK SEARCH mode, the pump runs in the higher speed of around 0.4 – 0.5 L/MIN, to make
leak investigation quicker and more efficient. When in the work display or any other test mode,
the pump runs in the lower speed of around 0.3 L/MIN to conserve power.
A hydrophobic dirt and water filter at the end of the gooseneck protects the pump and the rest
of the inside of the instrument from foreign material. There is an additional internal filter that also
helps to protect the pump from damaging debris. If water or dirt does enter the instrument and
impact the pump, a flow blocked message will be displayed.
⚠ WARNING: Operating the SENSIT GOLD G3 without a sensor cap or with a
damaged or altered sensor cap can cause damage to the instrument and
void the warranty.
LED DOME
The LED dome on the SENSIT GOLD G3 displays different colors and patterns to alert the
operator of various conditions. See the chart below for information on each�
COLOR INDICATION
Solid Green “Ready” indication. No current alarm condition or failure.
Blinking Green 1. Low battery indication. The work display will also give an indication on screen to alert the operator.
2. Conned space mode. By default, the LEDs will blink off every 30 seconds (adjustable).
Solid Amber / Yellow “LOW” alarm condition for combustible gas. The default setpoint for this is 5.0%LEL.
Solid Red
“HAZ 1 & 2” conditions for combustible gas. Both will also be indicated on the work
display.
• “HAZ1” is triggered at ≥10%LEL
• “HAZ2” is triggered at ≥25%LEL
Blinking Red
1. Any alarm conditions. How fast the LEDs blink is determined by the alarm level (low, high, or high-
high). For combustibles, this is a “HAZ 3” alarm.
2. Sensor failure/fault.
Solid Blue Busy, not in gas detection mode (e.g., viewing logs, SmartLink, SmartCal 360
Communication)

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PRODUCT FEATURES: SOFTWARE
WORK DISPLAY OPTIONS
COMBUSTIBLE GAS SCALE AND RESOLUTION
The combustible gas reading will be automatically displayed in one of three scales on the
SENSIT GOLD G3: PPM, %LEL, and %VOL. By default, the reading starts in the %LEL scale
(from 0%LEL) and will automatically switch to %VOL at ≥100%LEL (equal to 5.0%VOL by default,
see the section on LEL Definition), if equipped with a TC sensor.
If the %LEL option is disabled, the G3 will display in %VOL through the entire scale (either up to
5%VOL if the TC sensor is not equipped, or up to 100%VOL if equipped).
If the PPM option is enabled, the G3 will instead start at 0PPM, and automatically scale to
either %LEL (if enabled) or %VOL at the specified upper limit. By default, this is 2,000PPM.
Other options are 5,000PPM, 10,000PPM, or 50,000PPM. If set to 50,000PPM, the G3 will not
scale to %LEL even if it is enabled, because at the highest LEL Definition, 50,000PPM is equal to
100%LEL.
In addition, the display resolution for the PPM and %LEL scales are customizable. The default
display resolutions and options for each scale, while on the work display, are listed below.
DEFAULT RESOLUTION
PPM Disabled 1PPM or 10PPM
%LEL 0.1%LEL 0.1% - 2.0%LEL
[0.1% increments]
%VOL <5.0%VOL: 0.01%VOL
≥5.0%VOL: 0.1%VOL Not adjustable
COMBUSTIBLE GAS TYPE
The SENSIT GOLD G3 supports both natural gas (methane) and propane. The combustible gas
reading will show which is currently set. This can be adjusted in the User Menu (Gas Type). The
GAS TYPE setting only affects what calibration is applied and how the display reading is shown.
It does not affect what gasses the 2611 (LEL) sensor will respond to.
NOTE: Currently only natural gas (methane) is available as a GAS TYPE option. Propane will be
available upon release of the product.

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LEL DEFINITION
By default, the SENSIT GOLD G3 defines the lower explosive limit (LEL) as 5.0%VOL methane
and 2.2%VOL propane. This is factory adjustable between 4.0% and 5.0% for methane and
1.8% and 2.2% for propane (not currently supported), in 0.1% increments, based on company
or industry requirements. This will affect how the instrument displays the %LEL scale. For example,
if the LEL definition is 4.0%VOL, 2.5%VOL methane will display as 62.5%LEL. See the chart
below for examples for natural gas�
H2S RESOLUTION
If the SENSIT GOLD G3 is equipped with a hydrogen sulfide (H2S) sensor, it will have a
resolution of 1ppm by default (0-100PPM range). There is an optional Expert Menu adjustment
for this to increase the resolution to 0.1PPM.
HCN RESOLUTION
If the SENSIT GOLD G3 is equipped with a hydrogen cyanide (HCN) sensor, it will have a
resolution of 0.1PPM by default (0-30PPM range). There is an optional Expert Menu adjustment
for this to decrease the resolution to 1PPM.
NON-STANDARD READINGS
When equipped with the optional TC sensor, the SENSIT GOLD G3 has two “non-standard”
readings available: NSR (non-standard response) and NSC (non-standard combustible). These
can be triggered on the work display or in barhole mode.
NSR
NSR stands for non-standard response. This is an indication that the G3 has encountered a gas it
was not calibrated for. In the case of NSR, the gas is likely not combustible. If the G3 gas type is
set for natural gas (methane), NSR likely indicates a gas that is heavier than air such as carbon
dioxide, and if set for propane, likely indicates a gas that is lighter than air such as helium.
NSC
NSC stands for non-standard combustible. This is an indication that the G3 has encountered a
gas it was not calibrated for that is likely combustible. If the G3 gas type is set for natural gas
(methane), NSC likely indicates a combustible gas heavier than air such as propane, butane,
gasoline vapors, etc. If the G3 gas type is set for propane, NSC likely indicates a combustible
gas lighter than air such as natural gas, naturally occurring methane, or hydrogen.

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ALARMS
The SENSIT GOLD G3 has audible and visual alarms to warn the operator when hazardous
conditions are being sensed. There are alarm setpoints specific to the work display, leak search
mode, and confined space mode. The LED dome on the G3 changes color based on alarm
conditions. See the following sections for information on each.
WORK DISPLAY ALARMS
WORK DISPLAY
ALARM SETPOINTS
DEFAULT
LEL 50.0%LEL
EX - PPM Disabled
CO 35PPM
O2 - DEPLETION 19.5%VOL
O2 - ENRICHMENT 23.5%VOL
H2S 10.0PPM
HCN 4.7PPM
SO2 2.0PPM
NO2 3.0PPM
UEL SETPOINTS DEFAULT
NAT 17.0%VOL
PRO 12.0%VOL
LEAK SEARCH MODE ALARM
LEL and UEL alarms outlined above in the work display section are also active while in leak
search mode. There is also an additional alarm specific to leak search mode. By default, this
alarm is set to 50 PPM.

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OPERATION AND USE
⚠ CAUTION: Always start any SENSIT GOLD G3 in a gas free environment to ensure
a proper zero.
NOTE: Fully read and understand this section of the instruction manual before using your
SENSIT GOLD G3.
This section of the manual outlines the operation and use of the SENSIT GOLD G3 by general
categories. Due to the many custom options available, and many different applications the
instrument can be used in, there is not one comprehensive sequential set of instructions for using
the instrument. For a quick list of instructions to get up and running, see the Quick Start Guide at
the beginning of this manual, use this Operation and Use section for more detailed instructions,
and use the sections that cover the Quick Menu and User Menu for more specific instructions for
each test mode and menu.

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POWER-ON AND STARTUP SEQUENCE
Before powering on the SENSIT GOLD G3, ensure that you are in a gas free environment, and
that you have a charged battery pack installed into the battery sleeve, secured with the retaining
screw.
Press and hold the Abutton until the SENSIT logo appears on the display and the LED dome
illuminates. The startup process will follow as shown below, for an instrument with default settings
that is not due for calibration. There are many custom settings available in the G3 that may
change what appears during the startup process.
The instrument will not be ready to use until it reaches the work display, and both a successful
autozero and flow block check have been performed. The startup process will take less than 45
seconds typically, but can take up to a maximum of 5 minutes depending on the outputs of the
sensors.
NOTE: It is recommended to store G3 with battery pack installed (when possible) to reduce warm-
up time.
TIME
19:00:00
DATE
30/07/2020
TIME ZONE
6 HOURS 0 MINS

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BUMP TESTING AND CALIBRATION
To verify the accuracy of any SENSIT GOLD G3, it must be exposed to a known concentration
of test gas that will test any sensor combination included in your model. This is known as “bump
testing”. This can be done either by exposing the instrument to gas from the working display or
using the bump test feature which specifically tests each sensor and gives a pass or fail message.
For more information, see the Bump Test section in this manual.
Any sensor that does not meet the specifications listed in this manual may require calibration or
repair. A bump test does not calibrate the unit and does not update the calibration due date. Full
calibration is required for that.
A calibration past due message will be displayed during startup if calibration has not been
performed per your company specified interval. Any time it is suspected that the SENSIT GOLD
G3 is not working properly, check calibration.
THE WORK DISPLAY
After the startup process, the work display will be shown.
This is the main working screen of the instrument, and what
will be used most of the time when detecting gas. The live
readings are shown on screen simultaneously for all sensors
installed in the instrument.
FILTER INTEGRITY AND FLOW BLOCK CHECK
Prior to use, a flow block check needs to be performed to test the integrity of the sensor cap
and internal tubing. Block the inlet of the instrument at the end of the gooseneck. Within a few
seconds,
FLOW BLOCKED should be shown on the display. This ensures all seals are intact and
there are no air leaks in the probe or instrument. Press and release the Cbutton to restart the
pump and return to the previous screen. If flow block is not detected, check the integrity of the
O-ring seals and connections on the probe and instrument. If flow block cannot be achieved,
contact the factory for assistance. An airtight system is crucial for accurate readings.
READY FOR USE
After the startup process and Autozero are complete, and a successful flow block check has
been done, the instrument is ready for use. The “work display”, which is shown, will show live
gas readings. The readings from all currently installed sensors will be shown simultaneously. The
operator does not need to leave this screen for most general-purpose use. However, there are
quite a few specialized test modes for specific applications, such as bar hole testing and purging.
See the Quick Menu section for more information on these.
To use the SENSIT GOLD G3 for gas detection, always follow federal, state, municipal, and/or
company procedures, then follow these generalized steps below for using the SENSIT GOLD
G3.
1. It may be necessary to manually zero the instrument based on company practices and
environmental conditions. To do so, press & hold the Cbutton until
AUTOZERO appears
at the top of the screen. Always zero the instrument in a clean air environment.
2. 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. Always perform a ow block check when using any probe or
attachment.

15
3. When sampling the appropriate sensors will cause the display to update when a gas is en-
countered. Additionally, if a combustible gas is encountered a combination of LED patterns
and messages on the work display will occur when the preset concentrations are reached.
If any alarm condition exists for any sensor, based on their preset alarm points, the red 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. The standard alarms and LED patterns can be
found in the features section.
4. To disable the alarm, quickly press and release the Abutton. To enable the alarm press
and release the same button again. During an alarm, the gas that has exceeded the preset
alarm point will ash on the display, HAZARD 3 will be shown on the display, and the red
LED will ash indicating a potentially unsafe condition. When combustible gas readings
exceed the alarm range UEL, the audible alarm will turn off. If the alarm condition no longer
exists, the alarm sound will activate if a new alarm condition is encountered.
5. To assist in locating small leaks, utilize the TICK feature. See the Quick Menu section for
more information.
6. Following Federal, State, Municipal and/or Company procedures 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 conned spaces or ues. During
sampling, the respective readings may change. Audible and visual alarms will activate
when the preset limits are reached.
7. When equipped with the percent volume sensor, if the instrument encounters a gas with
abnormal response, it may read “NSR” or “NSC” followed by a number. If the instrument
for natural gas, “NSR” (Non-Standard Response) likely indicates a heavy noncombustible
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 for propane, “NSR” likely indicates gas lighter than air such
as helium . “NSC” may indicate methane, hydrogen, or natural gas.
8. When being used in dark areas, enable the ashlight by pressing and holding the C
button for 1-2 seconds. To disable the ashlight, again press and hold the Cbutton for 1-2
seconds. Additionally, the display is always backlit, so it is easy to read.
POWER OFF & BATTERY CHARGING
POWER OFF
To power off the SENSIT GOLD G3, ensure you are in a gas free environment, and then press
and hold the Abutton until the power off screen is shown. The instrument will purge for 10
seconds (by default) and then power off. During this purge, you can press and release the A
button again to stop the power off process.
BATTERY CHARGING
The SENSIT GOLD G3 battery pack can be charged both while installed in the instrument or
standalone. In both cases the contacts located on the bottom of the battery pact connect to the
pins located in the bottom of the charging base.
When charging the battery installed in the instrument, place the bottom of the instrument into
the charging base first, and the push the instrument back so that the stud located on the back
of the housing engages with the arm of the charging base. You will feel it engage and hear a
clicking noise. The instrument will then be locked in place. The charging LEDs will then illuminate.
Orange/yellow indicates the charging base has power, red indicates the battery is currently
charging, and green indicates the battery is fully charged. Blinking red indicates that the battery
pack is outside of the acceptable temperature range.

16
When charging the battery standalone, lift the arm on the back of the charging base, place the
bottom of the battery into the base, and the lower the arm down so it locks the battery in place.
Ensure that both the contacts on the battery pack and pins on the charging base are kept clean.
QUICK MENU TEST MODES
Depending on what type work the SENSIT GOLD G3 is being used for, there are a variety
of test modes available that are designed to be used for specific tasks. For example, using
BARHOLE mode for below-grade leak investigation.
To access these test modes, enter the Quick Menu from the working display by pressing and
releasing the Bbutton.
QUICK MENU will appear near the top of the display. You can scroll
through this menu by pressing and release the Cbutton, and selecting the mode currently shown
on screen by pressing and releasing the Bbutton. See the following sections for information
about these test modes.

17
TICK
STANDARD FEATURE
PURPOSE: Assist in pinpointing small combustible gas leaks
TICK mode is a default feature in the SENSIT GOLD G3, available on all models. It gives the
operator a ticking, audible tone that gets faster as the gas concentration increases. This assists
in pinpointing small combustible gas leaks by allowing the operator to rely on the tone and not
have to watch the display of the instrument. It detects very small changes in gas concentration,
which lets the operator very accurately and repeatably pinpoint the source of the leak.
The tick can be very gradually adjusted with the thumbwheel on the front of the instrument handle
or can be instantly reset to a “baseline” tick rate by using the Bbutton. This gives the operator
a lot of control, and as the leak is searched for, small changes can be made to narrow down the
source.
TO USE TICK:
1. From the working display, press and release the B
button to enter the
QUICK MENU .
2. The rst option in the menu should be tick. Press and
release the Bbutton to enable it. Upon activation,
an audible tick can be heard, and a bar graph is
displayed. The bar graph is a visual representation
of how fast the tick rate (empty bar = no tick, full
bar = max tick). To pinpoint a leak, move the sensor
head toward the area suspected of leakage. As the
sensor moves closer to a leak source, the tick rate
will increase. When the tick becomes a steady tone,
either rotate the thumbwheel back towards you to decrease the rate or press and release
the Bbutton to reset the rate to the baseline level. Then, a higher concentration of gas
can be searched for using the same procedure. When this process no longer nds a higher
concentration, the source of the leak has been pinpointed.
If the tick slows down or goes away, you have moved away from the leak or there is no
more gas present. For best results, always use the instrument prior to using any liquid leak
detection uids, because the sensor will react to them.

18
BAR HOLE TEST
STANDARD FEATURE
REQUIRES: TC sensor (%VOL sensor) equipped
PURPOSE: Below grade leak investigation
LOG SIZE: 2,048 Records
BAR HOLE MODE is a default feature in the SENSIT GOLD G3 when equipped with the TC
sensor (%VOL sensor). It is intended for use when conducting a below grade leak investigation,
generally in a hole bored in the ground with a plunger bar or drill. It gives the operator a
separate screen from the working display that shows only the combustible gas reading in the
%VOL scale (both real time and peak reading).
Bar hole mode is a timed test, which helps to ensure consistent results are achieved if multiple
tests are done, whether to grade a leak or map leak migration. Each
BAR HOLE test is logged in
its own log, with results, date and time, and GPS coordinates (if installed), that can be retrieved
wirelessly from the SENSIT GOLD G3 with Smart-Link 360 Software.
TO CONDUCT A BAR HOLE:
1. If you are sampling below grade in a hole, a bar hole probe is required for use while in this
mode. Attach the bar hole probe to the tting on end of the gooseneck and perform a ow
block check by blocking the inlet(s) of the probe. Within 10 seconds,
FLOW BLOCKED
should be shown on the display. This ensures all seals are intact and there are no air leaks
in the probe or instrument. Press and release the Cbutton to restart the pump and return
to the previous screen. If ow block is not detected, check the integrity of the O-ring seals
and connections on the probe and instrument. If ow block cannot be achieved, contact the
factory for assistance. An airtight system is crucial for accurate readings.
2. From the working display, press and release the B
button to enter the
QUICK MENU .
3. Press and release the Cbutton until
BARHOLE TEST
is shown.

19
BAR HOLE TEST
STANDARD FEATURE
REQUIRES: TC sensor (%VOL sensor) equipped
PURPOSE: Below grade leak investigation
LOG SIZE: 2,048 Records
BAR HOLE MODE is a default feature in the SENSIT GOLD G3 when equipped with the TC
sensor (%VOL sensor). It is intended for use when conducting a below grade leak investigation,
generally in a hole bored in the ground with a plunger bar or drill. It gives the operator a
separate screen from the working display that shows only the combustible gas reading in the
%VOL scale (both real time and peak reading).
Bar hole mode is a timed test, which helps to ensure consistent results are achieved if multiple
tests are done, whether to grade a leak or map leak migration. Each
BAR HOLE test is logged in
its own log, with results, date and time, and GPS coordinates (if installed), that can be retrieved
wirelessly from the SENSIT GOLD G3 with Smart-Link 360 Software.
TO CONDUCT A BAR HOLE:
1. If you are sampling below grade in a hole, a bar hole probe is required for use while in this
mode. Attach the bar hole probe to the tting on end of the gooseneck and perform a ow
block check by blocking the inlet(s) of the probe. Within 10 seconds,
FLOW BLOCKED
should be shown on the display. This ensures all seals are intact and there are no air leaks
in the probe or instrument. Press and release the Cbutton to restart the pump and return
to the previous screen. If ow block is not detected, check the integrity of the O-ring seals
and connections on the probe and instrument. If ow block cannot be achieved, contact the
factory for assistance. An airtight system is crucial for accurate readings.
2. From the working display, press and release the B
button to enter the
QUICK MENU .
3. Press and release the Cbutton until
BARHOLE TEST
is shown.
4. Press and release the Bbutton to enter BARHOLE
TEST
mode. A message will be displayed instructing
you to attach hardware.
5. To begin a bar hole test, insert the probe into the
location for the survey and then press and release the
Bbutton. A 30 second countdown for the test will
start. The current percent of gas by volume detected
will be displayed on the left side of the display. The
peak percent of gas by volume detected will be
displayed on the right side of the display. When the
test ends, the pump will shut off and any sustained
and peak readings will be shown and recorded.
6. If you have another test to take, remove the probe
from the test location and press and release the C
button to purge the gas out of the instrument. The
purge process will start and continue until the desired
setpoint is reached. This is set to 0.0%VOL by default
and adjustable in the User Menu. When the purge
stops, insert the probe into the next location and press
and release the Bbutton to start another test.
7. To exit barhole mode, press and release the Abutton once to return to the quick menu, or
twice to return to the work display.

20
CO TEST
OPTIONAL FEATURE
REQUIRES: Carbon monoxide (CO) sensor equipped
LOG SIZE: 4,096 Records
CO TEST in the SENSIT GOLD G3 is an optional feature when equipped with a Carbon
monoxide (CO) sensor. It is a timed test (180sec. by default) that shows the operator only the real
time and peak CO readings on a separate screen from the work display. It also has a separate
log that stores results of all
CO TESTS .
TO CONDUCT A CO TEST
1. If you are using the CO TEST to analyze ue gas, a hot air probe must be used. Attach the
probe to the tting on the end of the gooseneck and perform a ow block check by blocking
the inlet(s) of the probe. Within 10 seconds,
FLOW BLOCKED should be shown on the
display. This ensures all seals are intact and there are no air leaks in the probe or instrument.
Press and release the C button to restart the pump and return to the previous screen. If ow
block is not detected, check the integrity of the O-ring seals and connections on the probe
and instrument. If ow block cannot be achieved, contact the factory for assistance. An
airtight system is crucial for accurate readings.
2. From the working display, press and release the B
button to enter the QUICK MENU .
3. Press and release the Cbutton until
CO TEST is
shown.
4. Press and release the Bbutton to enter the
CO TEST .
A message will be displayed instructing you to attach
hardware.