Meets Gas ResearchInstitute (GRI)requirements for testingresidential gasfurnace heatexchangers using GRIprocedure number84/0162.

SENSIT®HXG-2

For use with combustible gasesInstruction Manual

© 1991 J And N Associates, Inc.Patented in the USA 6/03 R4

J And N Enterprises, Inc.P.O. Box 183 • Wheeler, IN 46393Phone: (219) 759-1142Fax: (219) 759-1835Order Line (800) 820-6199www.jandnent.com

ApprovedUL913,For Class 1,Division 1,Groups C & Dhazardous locationswhen used withalkaline batteries.

7WA6

CLASSIFIED

Gas Leak Detector

The SENSIT® HXG-2 instrument is factory cali-brated for methane in air. The alarm willindicate when the gas concentration at thesensor approaches the Alarm Set Point. TheAlarm Set Point is adjustable by the user forany gas concentration within the range of 0%to 40% of the lower explosive limit. The alarmresponse in the presence of any other gaswill be different.

SENSIT® is a registered trademark of J And NAssociates, Inc.1

Page #1. Caution2. Product Features3. General Description4. Operating Tips6. Battery Replacement7. Calibration8. Specifications8. Accessories9. Warranty and Repair/Exchange Policy

10. Safety10. Other J And N Products

CAUTION

CONTENTS

10

Ask about these other fine instrumentsfrom J And N.

SENSIT®HXG-3 - Combustible GasIndicatorSENSIT® - Refrigerant Gas DetectorsSENSIT® GOLD - Confined Space and LeakDetection ProductsSENSIT® GOLD CGI - Up to 4 Gas Combus-tible Gas Indicator

TRAK-IT® lll CGI - Combustible Gas Indicator

GAS•TRAC® - Combustible Gas Detector

TRAK-IT® DM/DMS-CO - CO Attachments forDigital Multimeters

OTHER PRODUCTS

SENSIT® HXG-2 is approved by UnderwritersLaboratories to UL913, for Class 1, Division1, Groups C & D hazardous locations whenused with alkaline batteries.

SAFETY

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

CAUTION

9 2

Your SENSIT® HXG-2 instrument is warrantedto be free from defects in materials and work-manship for a period of two years afterpurchase (excluding sensor, calibration andbatteries). If within the warranty period yourinstrument should become inoperative fromsuch defects, the unit will be repaired orreplaced at our option. This warranty coversnormal use and does not cover damagewhich occurs in shipment or failure whichresults from alteration, tampering, accident,misuse, abuse, neglect, or improper mainte-nance. A purchase receipt or other proof ofdate of original purchase will be requiredbefore warranty performance will berendered. Instruments out of warranty will berepaired for a service charge. Return the unitpostpaid and insured to:

J And N Enterprises, Inc.648 W 300 N

Valparaiso, IN 46385Phone: (219) 759-1142

Fax: (219) 759-1835Order Number: (800) 820-6199

This warranty gives you specific legal rightsand you may also have other rights which varyfrom state to state.

WARRANTY & REPAIR POLICY PRODUCT FEATURES

Gooseneck

Alarm LightPower On Light

On/Off Switch

TickAdjustment

BatteryCompartment

Solid StateSensor

GooseneckClip

AlarmSet

Quiet Alarm

EarphoneJack

LanyardLoop

SENSIT® HXG-2

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

The SENSIT® HXG-2 solid-state sensor issensitive to most combustible and/or toxicgases. A partial list of these gases is:Acetone, Alcohol, Ammonia, Steam, CarbonMonoxide*, Butane, Gasoline, Jet Fuel, Hy-drogen Sulfide, Smoke, Industrial Solvents,Methane, Lacquer Thinners, Naphtha, Pro-pane, Natural Gas.

3

GENERAL DESCRIPTION

This instrument cannot be used for findinglow level carbon monoxide leaks in furnacesor in the home. Order a Heat Exchanger TestKit accessory for testing furnace heatexchangers.

WARNING

Power Supply: Three “C” size alkalinebatteries.

Sensitivity: 10 ppm methaneSensor: Solid StateAlarm: Visual and audio at

approximately 10% of L.E.L.with an absolute maximumof 40% of L.E.L. for methane.Can be calibrated for otherconcentrations or gases.

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

OPERATION ENVIRONMENTTemperature: 0-120° FHumidity: 10%-90% R.H.

SPECIFICATIONS

8

* Not to be used to quantify the amount ofCO present.

ACCESSORIES

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

21 liter 0.5% Methane/Air

7

CAUTION: To verify the operation of thisinstrument it is necessary to apply com-bustible gas to the sensor head. The tickshould increase and alarms may sound. Toverify accuracy calibration must be per-formed.

A calibration kit complete with regulator, cali-bration gas, calibration cup and easy to useinstructions is available from your distributoror J And N Enterprises, Inc.

CALIBRATION ADJUSTMENTTo confirm the original factory calibrated alarmset point of 0.5% methane (10% LEL meth-ane) use calibration kit part #S0157-1 for thefollowing proceedures.

1. Turn on the unit in a gas free environmentfor a 10 minute warm up.2. Attach the regulator to the calibration gascylinder (0.5% methane). Attach the calibra-tion adapter to the regulator, gas flow startsautomatically. Immediately insert the sensorinto the calibration adapter.3. If necessary, adjust the alarm set knobslowly until the red alarm light and alarm toneactivate.4. Disconnect the calibration adapter from theregulator to conserve gas.

OPERATING TIPS1. Turn the instrument on in a noncontami-nated atmosphere. The instrument will gothrough a warm-up process.

2. During warm-up it is normal but not re-quired that the ticking sound increases andthe alarm indicates for a short time. Whilethe instrument is warming up the tick rate willslowly decrease until it becomes steady. Thealarm will also stop indicating as the instru-ment completes warm-up. The time requiredfor this will vary depending on the duration oftime since the instrument was last used.

CAUTION: If the instrument is in an areawhere detectable gases are present, thealarm may not stop.3. Once warm-up is complete adjust the ”TickAdjust” control to establish a slow uniformtick rate. Only after the tick rate remains steadyis the instrument ready for calibrated use. Toidentify the presence of gas vapors or leakslisten for any change in the tick rate. If the tickrate increases, the instrument has detectedthe presence or location of a leak. As thelevel of gas increases the tick rate will in-crease accordingly. If the alarm is indicating,the level of gas is near or above 0.5% gas orapproximately at a minimum of 10% of LELmethane. This indicates a potentially haz-ardous atmosphere. When the instrumentalarms a flashing red light will appear and anaudible warbling tone will sound. 4

6

If the SENSIT® HXG-2 green ready light failsto operate or if it blinks and the audio doesnot work, the batteries need replacement.Depress the latch using a coin and slide thebattery compartment cover off. Replace thebatteries with 3 fresh “C” alkaline batteries.

NOTE: When replacing batteries observe po-larity markings in the battery compartment. Afresh set of alkaline batteries should operatethe unit for approximately 30 hours.

BATTERY REPLACEMENT

5

4. To pinpoint a leak source it may be neces-sary to readjust the tick rate. The “NullableTick Rate” feature of the HXG-2 allows therate to be slowed and reestablished even inhigh gas concentrations. By turning the tickadjust counterclockwise and reestablishinga slow tick rate as needed the HXG-2 will con-tinually identify higher levels of gas therebylocating the leak source. Remember, an in-crease in the tick rate means you are gettingcloser while a decrease means you are mov-ing further away from the leak source.

5. To continue searching for a leak while thealarm is sounding, you may choose to de-press the “Quiet Alarm” button on the back ofthe instrument. This will silence the audibleportion of the alarm and allow the user to lis-ten to the tick rate pattern. The visual redflashing light will still be seen when the in-strument is alarming even if the “Quiet Alarm”button is used. You will note that the tick rateis independent of the alarm which is calibratedto the appropriate gas concentration.

6. The earphone can be plugged into the unitif there is high background noise or the op-erator does not want to disturb other people.The speaker is disabled by inserting the ear-phone.

OPERATING TIPS continuedOPERATING TIPS continued7. If the green light flashes or does not illumi-nate this is an indication that the batteriesneed replacement.

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

9. If the sensor is overexposed to somegases, the unit may take an extended periodof time to return to calibrated ready condition.

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

6

If the SENSIT® HXG-2 green ready light failsto operate or if it blinks and the audio doesnot work, the batteries need replacement.Depress the latch using a coin and slide thebattery compartment cover off. Replace thebatteries with 3 fresh “C” alkaline batteries.

NOTE: When replacing batteries observe po-larity markings in the battery compartment. Afresh set of alkaline batteries should operatethe unit for approximately 30 hours.

BATTERY REPLACEMENT

5

4. To pinpoint a leak source it may be neces-sary to readjust the tick rate. The “NullableTick Rate” feature of the HXG-2 allows therate to be slowed and reestablished even inhigh gas concentrations. By turning the tickadjust counterclockwise and reestablishinga slow tick rate as needed the HXG-2 will con-tinually identify higher levels of gas therebylocating the leak source. Remember, an in-crease in the tick rate means you are gettingcloser while a decrease means you are mov-ing further away from the leak source.

5. To continue searching for a leak while thealarm is sounding, you may choose to de-press the “Quiet Alarm” button on the back ofthe instrument. This will silence the audibleportion of the alarm and allow the user to lis-ten to the tick rate pattern. The visual redflashing light will still be seen when the in-strument is alarming even if the “Quiet Alarm”button is used. You will note that the tick rateis independent of the alarm which is calibratedto the appropriate gas concentration.

6. The earphone can be plugged into the unitif there is high background noise or the op-erator does not want to disturb other people.The speaker is disabled by inserting the ear-phone.

OPERATING TIPS continuedOPERATING TIPS continued7. If the green light flashes or does not illumi-nate this is an indication that the batteriesneed replacement.

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

9. If the sensor is overexposed to somegases, the unit may take an extended periodof time to return to calibrated ready condition.

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

7

CAUTION: To verify the operation of thisinstrument it is necessary to apply com-bustible gas to the sensor head. The tickshould increase and alarms may sound. Toverify accuracy calibration must be per-formed.

A calibration kit complete with regulator, cali-bration gas, calibration cup and easy to useinstructions is available from your distributoror J And N Enterprises, Inc.

CALIBRATION ADJUSTMENTTo confirm the original factory calibrated alarmset point of 0.5% methane (10% LEL meth-ane) use calibration kit part #S0157-1 for thefollowing proceedures.

1. Turn on the unit in a gas free environmentfor a 10 minute warm up.2. Attach the regulator to the calibration gascylinder (0.5% methane). Attach the calibra-tion adapter to the regulator, gas flow startsautomatically. Immediately insert the sensorinto the calibration adapter.3. If necessary, adjust the alarm set knobslowly until the red alarm light and alarm toneactivate.4. Disconnect the calibration adapter from theregulator to conserve gas.

OPERATING TIPS1. Turn the instrument on in a noncontami-nated atmosphere. The instrument will gothrough a warm-up process.

2. During warm-up it is normal but not re-quired that the ticking sound increases andthe alarm indicates for a short time. Whilethe instrument is warming up the tick rate willslowly decrease until it becomes steady. Thealarm will also stop indicating as the instru-ment completes warm-up. The time requiredfor this will vary depending on the duration oftime since the instrument was last used.

CAUTION: If the instrument is in an areawhere detectable gases are present, thealarm may not stop.3. Once warm-up is complete adjust the ”TickAdjust” control to establish a slow uniformtick rate. Only after the tick rate remains steadyis the instrument ready for calibrated use. Toidentify the presence of gas vapors or leakslisten for any change in the tick rate. If the tickrate increases, the instrument has detectedthe presence or location of a leak. As thelevel of gas increases the tick rate will in-crease accordingly. If the alarm is indicating,the level of gas is near or above 0.5% gas orapproximately at a minimum of 10% of LELmethane. This indicates a potentially haz-ardous atmosphere. When the instrumentalarms a flashing red light will appear and anaudible warbling tone will sound. 4

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

The SENSIT® HXG-2 solid-state sensor issensitive to most combustible and/or toxicgases. A partial list of these gases is:Acetone, Alcohol, Ammonia, Steam, CarbonMonoxide*, Butane, Gasoline, Jet Fuel, Hy-drogen Sulfide, Smoke, Industrial Solvents,Methane, Lacquer Thinners, Naphtha, Pro-pane, Natural Gas.

3

GENERAL DESCRIPTION

This instrument cannot be used for findinglow level carbon monoxide leaks in furnacesor in the home. Order a Heat Exchanger TestKit accessory for testing furnace heatexchangers.

WARNING

Power Supply: Three “C” size alkalinebatteries.

Sensitivity: 10 ppm methaneSensor: Solid StateAlarm: Visual and audio at

approximately 10% of L.E.L.with an absolute maximumof 40% of L.E.L. for methane.Can be calibrated for otherconcentrations or gases.

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

OPERATION ENVIRONMENTTemperature: 0-120° FHumidity: 10%-90% R.H.

SPECIFICATIONS

8

* Not to be used to quantify the amount ofCO present.

ACCESSORIES

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

21 liter 0.5% Methane/Air

9 2

Your SENSIT® HXG-2 instrument is warrantedto be free from defects in materials and work-manship for a period of two years afterpurchase (excluding sensor, calibration andbatteries). If within the warranty period yourinstrument should become inoperative fromsuch defects, the unit will be repaired orreplaced at our option. This warranty coversnormal use and does not cover damagewhich occurs in shipment or failure whichresults from alteration, tampering, accident,misuse, abuse, neglect, or improper mainte-nance. A purchase receipt or other proof ofdate of original purchase will be requiredbefore warranty performance will berendered. Instruments out of warranty will berepaired for a service charge. Return the unitpostpaid and insured to:

J And N Enterprises, Inc.648 W 300 N

Valparaiso, IN 46385Phone: (219) 759-1142

Fax: (219) 759-1835Order Number: (800) 820-6199

This warranty gives you specific legal rightsand you may also have other rights which varyfrom state to state.

WARRANTY & REPAIR POLICY PRODUCT FEATURES

Gooseneck

Alarm LightPower On Light

On/Off Switch

TickAdjustment

BatteryCompartment

Solid StateSensor

GooseneckClip

AlarmSet

Quiet Alarm

EarphoneJack

LanyardLoop

SENSIT® HXG-2

The SENSIT® HXG-2 instrument is factory cali-brated for methane in air. The alarm willindicate when the gas concentration at thesensor approaches the Alarm Set Point. TheAlarm Set Point is adjustable by the user forany gas concentration within the range of 0%to 40% of the lower explosive limit. The alarmresponse in the presence of any other gaswill be different.

SENSIT® is a registered trademark of J And NAssociates, Inc.1

Page #1. Caution2. Product Features3. General Description4. Operating Tips6. Battery Replacement7. Calibration8. Specifications8. Accessories9. Warranty and Repair/Exchange Policy

10. Safety10. Other J And N Products

CAUTION

CONTENTS

10

Ask about these other fine instrumentsfrom J And N.

SENSIT®HXG-3 - Combustible GasIndicatorSENSIT® - Refrigerant Gas DetectorsSENSIT® GOLD - Confined Space and LeakDetection ProductsSENSIT® GOLD CGI - Up to 4 Gas Combus-tible Gas Indicator

TRAK-IT® lll CGI - Combustible Gas Indicator

GAS•TRAC® - Combustible Gas Detector

TRAK-IT® DM/DMS-CO - CO Attachments forDigital Multimeters

OTHER PRODUCTS

SENSIT® HXG-2 is approved by UnderwritersLaboratories to UL913, for Class 1, Division1, Groups C & D hazardous locations whenused with alkaline batteries.

SAFETY

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

CAUTION

Meets Gas ResearchInstitute (GRI)requirements for testingresidential gasfurnace heatexchangers using GRIprocedure number84/0162.

SENSIT®HXG-2

For use with combustible gasesInstruction Manual

© 1991 J And N Associates, Inc.Patented in the USA 6/03 R4

J And N Enterprises, Inc.P.O. Box 183 • Wheeler, IN 46393Phone: (219) 759-1142Fax: (219) 759-1835Order Line (800) 820-6199www.jandnent.com

ApprovedUL913,For Class 1,Division 1,Groups C & Dhazardous locationswhen used withalkaline batteries.

7WA6

CLASSIFIED

Gas Leak Detector