Heath Consultants Detecto-Pak 4 (DP) - Manual (Page 37)

100786-0 Rev. D 05/09
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CHAPTER EIGHT
VIII. MAINTENANCE INFORMATION
TROUBLESHOOTING PROCEDURES AND PERIODIC
MAINTENANCE
This chapter deals with troubleshooting procedures and periodic
maintenance.
Each instrument utilized for leak detection and evaluation should be
operated in accordance with the manufacturer’s operating instructions.
1. Instrument should be periodically “checked” while in use to ensure
that the recommended voltage requirements are available.
2. Instrument should be tested daily or prior to use to ensure proper
operation, to ensure that the sampling system is free of leakage, and
to ensure that the filters are not obstructing the sample flow.
3. This instrument is now equipped with an improved cell base and fuel
flow system.
CELL BASE: Changes to the cell base include an improved ceramic
flame orifice and re-designed flashback arresters.
FUEL FLOW SYSTEM: Changes to the fuel flow system include an
improved fixed fuel flow restrictor that replaces the adjustable restrictor.
The .005” in-line restrictor has also been removed. Also, a 5 micron
filter has been added.
When the instrument is calibrated and adjusted at the factory, a sticker
is placed on the side and end of the case and on the inside housing to
indicate the proper pressure gauge set point for correct fuel flow rate.
Outside will vary from 16-24 psi. Inside flow rate is a constant 30 cc/
min.
Before calibration, and at least once daily, plug in the external pressure
gauge assembly and check the gauge pressure.
If it does not match the set point pressure on the sticker (using a fuel
cylinder with 1000 psig of fuel), remove the plastic hole plug from
the bottom of the instrument and with a 3/16” Allen wrench turn the