TPI HXG2 User Manual

SENSIT

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HXG-2

Instruction Manual

For use with combustible gases

Gas Leak Detector

Approved
UL913,
For Class 1,
Division 1,
Groups C & D
hazardous locations
when used with
alkaline batteries.

Meets Gas Research
Institute (GRI)
requirements for testing
residential gas
furnace heat
exchangers using GRI
procedure number
84/0162.

J And N Enterprises, Inc.
P.O. Box 183 • Wheeler, IN 46393
Phone: [phone]
Fax: [phone]
Order Line [phone]
www.jandnent.com

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CONTENTS

Page #

1. Caution

2. Product Features

3. General Description

4. Operating Tips

6. Battery Replacement

7. Calibration

8. Specifications

8. Accessories

9. Warranty and Repair/Exchange Policy

10. Safety

10. Other J And N Products

CAUTION

This safety symbol is use to indicate a potentially hazardous situation
which, if not avoided, may result in minor or moderate injury.

CAUTION

The SENSIT® HXG-2 instrument is factory cali­brated for methane in air. The alarm will
indicate when the gas concentration at the
sensor approaches the Alarm Set Point. The
Alarm Set Point is adjustable by the user for
any gas concentration within the range of 0%
to 40% of the lower explosive limit. The alarm
response in the presence of any other gas
will be different.

SENSIT® is a registered trademark of J And N
Associates, Inc.

1

PRODUCT FEA TURES

SENSIT® HXG-2

On/Off Switch

Power On Light

Gooseneck

Alarm
Set

Tick
Adjustment

Quiet Alarm

Alarm Light

Solid State
Sensor

Gooseneck
Clip

Lanyard
Loop

Earphone
Jack

Battery
Compartment

2

GENERAL DESCRIPTION

The SENSIT® HXG-2 instrument is an ad-
vanced state-of-the-art leak detector capable
of detecting many combustible, noncombus­tible and toxic gases.

The SENSIT® HXG-2 solid-state sensor is
sensitive to most combustible and/or toxic
gases. A partial list of these gases is:
Acetone, Alcohol, Ammonia, Steam, Carbon
Monoxide*, Butane, Gasoline, Jet Fuel, Hy­drogen Sulfide, Smoke, Industrial Solvents,
Methane, Lacquer Thinners, Naphtha, Pro­pane, Natural Gas.

* Not to be used to quantify the amount of
CO present.

WARNING

This instrument cannot be used for finding
low level carbon monoxide leaks in furnaces
or in the home. Order a Heat Exchanger Test
Kit accessory for testing furnace heat
exchangers.

3

OPERA TING TIPS

1. Turn the instrument on in a noncontami­nated atmosphere. The instrument will go
through a warm-up process.

2. During warm-up it is normal but not re­quired that the ticking sound increases and
the alarm indicates for a short time. While
the instrument is warming up the tick rate will
slowly decrease until it becomes steady. The
alarm will also stop indicating as the instru­ment completes warm-up. The time required
for this will vary depending on the duration of
time since the instrument was last used.

CAUTION: If the instrument is in an area
where detectable gases are present, the
alarm may not stop.

3. Once warm-up is complete adjust the ”Tick
Adjust” control to establish a slow uniform
tick rate. Only after the tick rate remains steady
is the instrument ready for calibrated use. To
identify the presence of gas vapors or leaks
listen for any change in the tick rate. If the tick
rate increases, the instrument has detected
the presence or location of a leak. As the
level of gas increases the tick rate will in­crease accordingly. If the alarm is indicating,
the level of gas is near or above 0.5% gas or
approximately at a minimum of 10% of LEL
methane. This indicates a potentially haz­ardous atmosphere. When the instrument
alarms a flashing red light will appear and an
audible warbling tone will sound.

4

OPERA TING TIPS continued

4. To pinpoint a leak source it may be neces­sary to readjust the tick rate. The “Nullable
Tick Rate” feature of the HXG-2 allows the
rate to be slowed and reestablished even in
high gas concentrations. By turning the tick
adjust counterclockwise and reestablishing
a slow tick rate as needed the HXG-2 will con­tinually identify higher levels of gas thereby
locating the leak source. Remember, an in­crease in the tick rate means you are getting
closer while a decrease means you are mov­ing further away from the leak source.

5. To continue searching for a leak while the
alarm is sounding, you may choose to de­press the “Quiet Alarm” button on the back of
the instrument. This will silence the audible
portion of the alarm and allow the user to lis­ten to the tick rate pattern. The visual red
flashing light will still be seen when the in­strument is alarming even if the “Quiet Alarm”
button is used. You will note that the tick rate
is independent of the alarm which is calibrated
to the appropriate gas concentration.

6. The earphone can be plugged into the unit
if there is high background noise or the op­erator does not want to disturb other people.
The speaker is disabled by inserting the ear­phone.

5

OPERA TING TIPS continued

7. If the green light flashes or does not illumi­nate this is an indication that the batteries
need replacement.

8. The unit will respond to some leak finding
solutions (soap). Use your SENSIT® HXG-2
instrument first.

9. If the sensor is overexposed to some
gases, the unit may take an extended period
of time to return to calibrated ready condition.

10. T o increase battery life turn the unit to “OFF”
when not in use.

BA TTERY REPLACEMENT

If the SENSIT® HXG-2 green ready light fails
to operate or if it blinks and the audio does
not work, the batteries need replacement.
Depress the latch using a coin and slide the
battery compartment cover off. Replace the
batteries with 3 fresh “C” alkaline batteries.

NOTE: When replacing batteries observe po­larity markings in the battery compartment. A
fresh set of alkaline batteries should operate
the unit for approximately 30 hours.

6

CALIBRA TION ADJUSTMENT

T o confirm the original factory calibrated alarm
set point of 0.5% methane (10% LEL meth­ane) use calibration kit part #S0157-1 for the
following proceedures.

1. Turn on the unit in a gas free environment
for a 10 minute warm up.

2. Attach the regulator to the calibration gas
cylinder (0.5% methane). Attach the calibra­tion adapter to the regulator, gas flow starts
automatically. Immediately insert the sensor
into the calibration adapter.

3. If necessary, adjust the alarm set knob
slowly until the red alarm light and alarm tone
activate.

4. Disconnect the calibration adapter from the
regulator to conserve gas.

CAUTION: T o verify the operation of this
instrument it is necessary to apply com­bustible gas to the sensor head. The tick
should increase and alarms may sound. T o
verify accuracy calibration must be per­formed.

A calibration kit complete with regulator, cali­bration gas, calibration cup and easy to use
instructions is available from your distributor
or J And N Enterprises, Inc.

7

SPECIFICA TIONS

Power Supply: Three “C” size alkaline

batteries.

Sensitivity: 10 ppm methane
Sensor: Solid State
Alarm: Visual and audio at

approximately 10% of L.E.L.
with an absolute maximum
of 40% of L.E.L. for methane.
Can be calibrated for other
concentrations or gases.

Warm-up: Approximately 1 minute
Response Time: < 2 seconds (to 40% L.E.L.)
Recovery Time: < 4 seconds (to 40% L.E.L.)
Duty Cycle: Intermittent
Battery Life: Approximately 30 hours.
Dimensions: 3.5” x 10” x 1.6”
Weight: 1.3 lbs.
Probe Length: 16”
Approvals: UL913 Intrinsically safe

OPERA TION ENVIRONMENT
Temperature: 0-120° F
Humidity: 10%-90% R.H.

ACCESSORIES

S0157-1 Calibration Kit (small)
C0130-0.5 Replacement Cal. Cylinder

21 liter 0.5% Methane/Air

8

WARRANTY & REP AIR POLICY

Your SENSIT® HXG-2 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:

J And N Enterprises, Inc.

648 W 300 N

Valparaiso, IN 46385

Phone: [phone]

Fax: [phone]

Order Number: [phone]

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

9

OTHER PRODUCTS

Ask about these other fine instruments
from J And N.

SENSIT®HXG-3 - Combustible Gas

Indicator

SENSIT® - Refrigerant Gas Detectors
SENSIT® GOLD - Confined Space and Leak

Detection Products
SENSIT® GOLD CGI - Up to 4 Gas Combus­tible Gas Indicator

TRAK-IT
GAS•TRAC
TRAK-IT

®

lll CGI - Combustible Gas Indicator

®

- Combustible Gas Detector

®

DM/DMS-CO - CO Att achments for

Digital Multimeters

SAFETY

SENSIT® HXG-2 is approved by Underwriters

Laboratories to UL913, for Class 1, Division
1, Groups C & D hazardous locations when
used with alkaline batteries.

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© 1991 J And N Associates, Inc.

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Patented in the USA 6/03 R4