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Adjusting Sensitivity Levels 

 

The  Leak  Detector  will  default  to  the 

“NORM”  sensitivity  level 

automatically once the unit comes out of the warm up cycle and 
the green LED will turn on.  
 
To  change  sensitivity  levels,  press  the  SENS  once  for 

“HI” 

sensitivity  (red  LED  will  turn  on)  and  again  for 

“LO”  sensitivity 

(yellow LED will turn on). 

 

Leak Test Vial 

 

The leak detector comes with a Leak Test Vial that allows the 
user to make sure the detector is performing properly.  

 
To test the instrument 

1.

 

Remove  the  colored  label  dot  in  the  center  of  the  screw 
cap  to  expose  the  vent hole  in  the  top  of the  screw  cap. 
(see fig. below) 

2.

 

Turn  on  the  detector  and  allow  the  unit  to  complete  the 
warm up cycle.  

3.

 

Place the sensor close to the small hole in the top of the 
Leak  Test  Vial.  The  beep  rate  should  increase  and  the 
Digital Leak Size Indicator  should display a number from 
3-6 indicating that the sensor and electronics are working 
properly. 

 
 
 
 
 
 
 
 
 
 

 

NOTE: Replace the Test Vial back in the nylon bag when 
not in use to extend the shelf life. Replace Test Vial when 
the green color is less than ¼ full or at the time of the 
expiration

 date.

 

 
 

 

 

 

 

Leak Test Vial 

Remove label dot over 

vent hole before testing 

Expiration Date 

on label 

Vial Cap with vent 

hole 

Summary of Contents for D740

Page 1: ...Model D740 H2 Tracer Gas Leak Detector User Manual Detects H2 N2 5 95 Tracer Gas Design certified by ACSI to meet SAE Standard J2970...

Page 2: ...4a in the HI setting and 7 g yr in the NORM setting while moving the probe at 3 second This complies with SAE Standard J2970 sections 7 2 and 7 3 Leak Testing with Tracer Gas is consistent with the te...

Page 3: ...long a c lines and fittings no further away than 3 8 and moving at approximately 3 second If the detector alarms make smaller sweeps back and forth until the leak source can be pin pointed Note The D7...

Page 4: ...ate of approximately 3 second and as close as possible to the suspected area If looking for an apparently larger leak check first at the 7 g yr Norm setting or the LO setting Once the source of the le...

Page 5: ...in the center of the screw cap to expose the vent hole in the top of the screw cap see fig below 2 Turn on the detector and allow the unit to complete the warm up cycle 3 Place the sensor close to th...

Page 6: ...er battery orientation Sensor Replace Filter Unscrew sensor tip as shown to replace filter Replace filter whenever it becomes visibly dirty or every 2 to 3 months depending on use Replace Sensor Remov...

Page 7: ...itive response Product Specifications Model D740 Name Leak Detector H2 Tracer Gas Sensitivity 4 g yr R 134a equivalent Sensor Life 300 hours Response Time Instantaneous Power Supply 4 AA Alkaline batt...

Page 8: ...with return address phone number and or email address SERVICE CENTER 2651 W 81st Street Hialeah FL33016 WARRANTY POLICY The D740H2 N2 Tracer Gas Leak Detector is warranted to be free of defects in ma...

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