TPI (Test Products International) HXG-2D User manual

WARRANTY AND REP AIR POLICY

Your SENSIT® HXG-2d instrument is warranted to be free from
defects in materials and workmanship for a period of two years
after purchase (excluding sensor , calibration and batteries). 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. A purchase receipt or other proof of date of
original purchase will be required before warranty performance
will be rendered. Instruments out of warranty will be repaired for
a service charge. Return the unit postpaid and insured to:

This warranty gives you specific legal rights and you may also
have other rights which vary from state to state.

SENSIT® HXG-2d

Combustible Gas Detector

INSTRUCTION MANUAL

Read and understand Instructions before use.

710183
UL 913

Suitable for combustible gases
such as Methane, Butane, Propane
and Natural Gas

MADE IN USA

#750-00022 Instruction Manual

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10-30-09 Revised 3-27-14 V5

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CONTENTS

NOTICE

CAUTION: This safety symbol is used to indicate a potentially hazardous situation

which, if not avoided, may result in minor or moderate injury.

WARNING: This safety symbol is used to indicate a potentially hazardous situa-

tion which, if not avoided, may result in serious injury.

WARNING: Do not replace batteries when an explosive atmosphere
is present.

WARNING: Use only DURACELL® PROCELL, T ype PC1400 Alkaline
Batteries

WARNING: Do not mix batteries of different age or type.

WARNING: For use in clean dry areas only.

WARNING: Not for use in atmospheres of oxygen greater than 21%.

WARNING: Substitution of components may impair intrinsic safety.

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.

WARNING: All Accessories are to be used in an area known to be
non-flammable.

WARNING: Use only sensor from SENSIT T echnologies. PN 375-261 1-01

NOTE: Performance/Accuracy aspects of this product have not been

assessed and are not covered as a part of the SGS approval.

Page # 3 Accessories and Parts

4 General Description
5 Specifications
5-7 Product Features
7 Sensor Type
7 Sensor Filter Replacement / Cleaning
8 Battery Installation
9-11 Operation and Use
12 Calibration Check
12-13 Calibration
14 Sensor Replacement
15 Adjustable Features
16 Warranty and Repair Policy (Back Cover)

ACCESSORIES AND PARTS

Standard Accessories (included)

Soft Carrying Pouch 360-00006
T10 Torx Wrench 360-00105
Duracell “C”Alkaline Battery (ea) 310-00004*
Sensor Retainer Filter 360-00203
Wrist Strap 360-00040
Instruction Manual 750-00022

Optional Accessories and Parts

Extension Adapter 870-00012
Calibration Kit 2.5% Methane 881-00017
Calibration Kit .5% Methane 881-00075
LEL Sensor 375-2611-01
Sensor Cap 365-00045

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GENERAL DESCRIPTION

SPECIFICA TIONS

The Sensit® HXG-2d is designed to detect combustible gases.
This instrument incorporates an advanced low power semicon­ductor sensor to measure a wide variety of combustible gases
in both the PPM and %LEL range. The PPM readings auto-range
to %LEL when the concentration exceeds 990PPM (2%LEL meth­ane). Optionally all readings can be set to a resolution of

0.1%LEL only (PPM off). An “on demand” backlight allows use in
dark environments. A user activated “TICK” control assists in
locating small gas leaks. Audible and visual alarms warn the
operator of hazards. The alarms can be set in either the PPM or
LEL modes. The default alarm is 10%LEL methane.

The instrument is adjusted at the factory for either methane or
propane as the primary gas, and is calibrated accordingly. The
primary gas can be selected when ordering.

The Sensit® HXG-2d meets US UL913 requirements when used
with approved batteries.

The Sensit® HXG-2d is operated using approved alkaline bat-
teries only.

WARNING: Never mix batteries of different age or type.

SENSOR SPECIFICATIONS

TYPE RESOLUTION RANGE ACCURACY

PPM 10ppm 0-990ppm ±10%

LEL 0.1% 0-100%LEL ±10%

PRODUCT SPECIFICA TIONS

Size: 10” x 3” x 1.6” (254 x 76 x 41 mm)
Weight: 1.2 lbs. (544g)
Operational Temp: -20 to 40°C (-4 to 104° F)
Battery Life: Alkaline: 50 hours continuous

PRODUCT FEA TURES

SENSOR

BACKLIT DISPLAY

SPEAKER
(ON BACK)

16” FLEXIBLE
GOOSENECK

PUSH BUTTONS

FILTER
SOLID STATE

SENSOR

WARNING LED

BATTERY

BATTER Y SLEEVE
RETAINING SCREW

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COMPARTMENT

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PRODUCT FEATURES continued from p age 5

PRODUCT FEA TURES continued from page 6

Sensit® HXG-2d instruments are constructed of durable high

impact ABS to withstand the rigors of field use.
Incorporated in the hand grip area is the battery compartment.

All Sensit® HXG-2d instruments require 3. Duracell PC1400
batteries provide approximately 50 hours of continuous use.

A push button located in the center of the instrument activates
an audible tick sound that will help in locating the source of a
gas leak. This tick is generated by using specialized circuitry in
combination with the LEL sensor located at the end of the goose­neck assembly . The tick can be easily heard with the speaker
located in the back of the instrument.

A flexible gooseneck is used to assist in locating the source of
gas leaks and remote sampling.

The display continuously updates the operator of changes in
gas concentrations and alerts of low battery power . A green LED
on the left side indicates the instrument is ready for use. A red
LED indicates the preset alarm points have been exceeded.

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There are 3 operational button pads on the front of all
Sensit® HXG-2d instruments.

(A) POWER/MUTE BUTTON:
Operate the POWER and MUTE feature and exit menu items.

(B) TICK/CAL BUTTON:

Use to operate TICK or begin calibration.

(C) LIGHT/ZERO BUTTON:

Use to turn on the backlight or manually zero the sensor.

SENSOR TYPE
Combustible Gas Sensor

All Sensit® HXG-2d instruments incorporate a highly sensitive
semiconductor type 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 10ppm of methane up to 100% LEL. Factory
calibration uses methane gas. This sensor will detect many
combustible gases.

SENSOR FIL TER REPLACEMENT / CLEANING

Remove sensor cap by pressing retaining tab located on side of
sensor and pulling the cap away from base. Filter will be loose
inside. Clean filter with mild soap and water and thoroughly dry
filter cap. Replace Cap/Filter on base until retaining tab engages.

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BA TTERY INST ALLA TION/REPLACEMENT

WARNING: Always change batteries in an environment
free of combustible gases.

WARNING: Do not mix batteries of different type or age.

Battery replacement is necessary when the BAT icon is illumi­nated and the green LED is flashing. This warning indicates there
is approximately 15 minutes or less operational time before the
instrument turns off automatically due to insufficient battery power .

Remove the battery sleeve cover by removing the battery sleeve
screw with a T -10 screwdriver. Depress the locking tab on the front
of the handle with a coin or flat object and pull the battery sleeve
handle away from the top or display area of the instrument.

Place 3 approved batteries into the battery holder. Observe the
polarity markings on the inside of the battery holder for proper
battery installation. Improper installation will cause the instrument
not to operate. Replace the battery sleeve and allow the locking
tab to snap into position. Replace the battery sleeve retaining screw .
Check to be sure the handle is secure to the instrument body by
firmly pulling the handle away . The handle will remain in place if a
proper connection is made.

OPERATION AND USE

CAUTION: Always start any Sensit® HXG-2d in a gas free

environment to ensure a proper zero.

1. Push and hold the power button (A) until the display and backlight

illuminates.

2. If the display fails to illuminate or the BAT icon is shown on the
display, replace the batteries.

3. During successful start-up the instrument will display:
a. Display all segments
b. Turn on and off the backlight
c. Display “S2d” as the model number
d. Display software version
e. Display “50.0%” or “10.0%” indicating the LEL Calibration point

for the instrument

f. Display “dIS” indicating display resolution of PPM / %LEL

or both.
g. Display “AL” followed by the alarm set point.
h. Activate the alarm sound and red LED for 3 beeps
i. Continue to flash all segments until proper warm-up is

attained (no more than five minutes)
j. Flash “Zro” indicating fresh air zeroing
k. Working display is shown

NOTE: A failure to properly zero due to the presence of gas is indicated
by “bAd” + cal icon illuminated on the display. Pressing the ZERO (C)
button for 6 seconds and releasing will restart the zeroing process.

NOTE: If a sensor is completely inoperable or improperly zeroed at
start up, the display will show “bAd”.

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OPERA TION AND USE continued from page 8

4. All instruments read with a resolution of 10ppm up to 990ppm.

The scale automatically switch to LEL when 990ppm is exceeded
with a resolution of 0.1% LEL. Optionally all readings may be
displayed in LEL only. Readings beyond 100% LEL are indi­cated by “OL” (overload).

5. It may be necessary to manually zero the instrument based
on company practices and environmental conditions.

CAUTION: Zeroing should be done in a gas free envi­ronment only.

6. When testing 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 slides onto the battery sleeve and is
held in place by the locking nut assembly .

OPERA TION AND USE continued from page 10

NOTE: These instruments have cross sensitivities to a variety of
gases.

9. To assist in locating the source of small combustible gas

leaks or surveying areas outdoors or indoors, press and release
the TICK/CAL button (B). This will start an audible tick preset at
2-3 ticks per second.

Move the sensor toward the area suspected of leakage. As the
sensor moves closer to a leak source the tick will increase.
When the tick becomes a steady tone press the TICK/CAL but­ton (B) again while keeping the sensor head in the same posi­tion. This will slow down the tick and allow the operator to find a
higher concentration using the same procedure.

If there is no tick, press the TICK/CAL button (B) again to reset
to the steady ticking sound. For best results always use the
leak detector prior to using any liquid leak detection fluids as
these sensors will detect their presence.

7. When a gas is sensed the display will update. If an alarm
condition exists, based on a preset alarm point, the red LED will
flash and the alarm will sound.

8. During an alarm condition (factory default at 10% LEL meth­ane) the display will flash and an audible alarm will sound indi­cating a potentially unsafe environment. T o disable the audible
alarm press and release the MUTE button (A). To enable the
alarm press and release it again.

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10. Following Country , Province, St ate, Municipal and/or Com­pany procedures move to the areas where gas readings are sus­pected or must be tested. During sampling the respective read­ings may change. Audible and visual alarms will activate when
the preset limits are reached.

11. When being used in dark areas press and release the LIGHT/
ZERO button (C) to turn on the back light Press again to turn off.

12. To turn instrument off, push and hold the POWER/MUTE
button (A) for 5-6 seconds until “OFF” appears on the display.

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CALIBRA TION CHECK

To verify the accuracy of any Sensit® HXG-2d it must be ex­posed to a known concentration of test gas. Any sensor that
does not meet the specifications listed in this manual may re­quire calibration or replacement.

Any time it is suspected the Sensit® HXG-2d is not working properly ,
has read “OL” or has been exposed to silicone, check calibration.

CALIBRA TION

CALIBRATION continued from page 12

Step 3: Attach the adapter to the sensor cap assembly.
Step 4: Press the TICK/CAL button (B) and the cal icon will flash

and numbers will change on the display . Upon completion, the
working display will appear with the gas reading.

A reading of “bAd” indicates unsuccessful calibration. Repeat
process if “bAd” appears. Press the POWER/MUTE button (A)
to clear the “bAd” display reading and go to the working display .

Calibration is the process of setting the readings of the instru­ment to equal the value of the certified calibration gas. The in­strument should operate for 5 minutes before calibrating.

NOTE: Use of calibration kits other than those offered or ap­proved by SENSIT TECHNOLOGIES may cause inaccurate read­ings. Repairs may be required if the instrument fails to calibrate.
Use only sensors supplied by SENSIT TECHNOLOGIES or their
authorized representative.

NOTE: During the calibration process the numbers on the dis­play are not the actual gas concentration.

Step 1: Prep are 50%LEL or 10% LEL Methane/Air, depending
on what calibration point the unit calls for, and proper regulator
and adapter.

Step 2: Press the TICK/CAL button (B) for 6 seconds until “GAS”
is displayed.

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Continued unsuccessful calibrations may indicate faulty sensor.

Any instrument that will not calibrate or continues to indicate
“bAd” on the display, should be taken out of service. Please
contact Sensit Technologies for further assistance.

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SENSOR REPLACEMENT

ADJUSTABLE FEA TURES

WARNING: Perform service only in areas known to be non­flammable.

WARNING: Substitution of component s may impair intrinsic safety.
WARNING: Use only sensor from SENSIT Technologies.

Part Number 375-2611-01

Step 1: Turn off instrument.
Step 2: Remove sensor cap and sensor retainer filter .
Step 3: Remove sensor . Observe the location of the tab relative

to the white dot beneath, on the circuit board.
Step 4: Replace sensor . Be sure to align the sensor tab directly

over the white dot.
Step 5: Place sensor ret ainer filter inside sensor cap and install

sensor cap.
Step 6: T urn instrument on and wait for zero process to complete.

“bAd” indicates improperly installed sensor or additional warm-up
time is required. Allow the instrument to operate for 10 minutes,

then press and hold the C button to reestablish zero. If “bAd”
remains on the display , remove the instrument from service.

Step 7: If zeroing of the replacement sensor was successful

and at least a 5 minute warm-up has been observed, proceed
with the calibration instructions.

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MENU ITEMS RANGE DEFAULT

Alarm PPM 100-990 OFF
Alarm-LEL 2-60% 10%
Show PPM 10PPM Resolution O N

The Above settings are field adjustable:

Setting Display Mode For %LEL & Alarm Setpoint For %LEL

1. While the unit is on and in the working display, push the A and C buttons until the
display shows OPt.

2. Press the B button once until the display shows diS%. This indicates the working
display will show measurements in %LEL.

3. Press the B button once more until the display shows AL%. This indicates the
alarm setpoint can be set in units of %LEL.

4. Press the B button once more until the display shows XX.X%. This is the alarm
setpoint (XX.X can be values of 0-9).

5. Press the C button to increment the alarm setpoint or press the B button to
decrement the alarm setpoint (Minimum 2.0%LEL, Maximum 60.0%LEL)

6. Press the A button once to exit to the OPt menu.

7. Press the A button once more to exit to the working display which will show
measurements in %LEL.

Setting Display Mode For PPM & %LEL & Alarm Setpoint For PPM

1. While the unit is on and in the working display, push the A and C buttons until the
display shows OPt.

2. Press the B button once until the display shows diS%. This indicates the working
display will show %LEL measurements.

3. Press the C button once until the display show diS% ppm. This indicates the
working display will initially show ppm measurements then transition to %LEL
measurements once the unit measures greater than 990ppm.

4. Press the B button once more until the display shows AL ppm. This indicates the
alarm setpoint can be set in units of PPM.

5. Press the B button once more until the display shows XXXppm. This is the alarm
setpoint; it must be set to a PPM value greater than or equal to 100ppm to
activate the PPM alarm.

6. Press the C button to increment the alarm setpoint or press the B button to
decrement the alarm setpoint (PPM Alarm Off: 99ppm, Minimum 100ppm,
Maximum 990ppm)

7. Press the A button once to exit to the OPt menu.

8. Press the A button once more to exit to the working display which will show
measurements in PPM.

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