3
Low Pressure Air Tests - 125 PSI Maximum
Procedure for Model LP-A4
STEP 5)
At the end of each test period, read the tube immediately and record the results. Repeat with the other tubes until all de-
sired contaminants have been sampled.
STEP 6)
Close the regulator knob (turn counterclockwise) to shut off pressure to owmeter. Open the owmeter valve to bleed
pressure from the owmeter. Disconnect regulator from air distribution manifold and store system in case.
Model LP-A4 is supplied with a regulator/owmeter that must be con-
nected after the compressor’s Grade-D ltration system. The male plug,
1/4” industrial interchange, installed on the inlet of the pressure regulator
can be coupled directly into the air distribution manifold of the ltration
system. The test will determine acceptable air quality and whether or not
the ltration system is functioning properly.
STEP 1)
Attach regulator assembly to female coupling on air distribution manifold.
The owmeter should be in the vertical position for maximum accuracy.
NOTE: The 1/4” industrial interchange plug on the regulator will need to
be changed or an adapter used if the coupling on the manifold is some-
thing other than a 1/4” industrial interchange.
STEP 2)
Turn the regulator knob clockwise and set pressure between 20-30 PSI.
Do not adjust the owmeter at this time.
NOTE: The recommended tube testing sequence is as follows:
water vapor, carbon dioxide, carbon monoxide, and oil mist.
STEP 3)
Break the ends off a fresh test tube using the small metal breaker sleeve
in the kit. Install the test tube in the rubber tube holder with the directional
arrow found on the tube pointing down. Install tube by rst inserting the
upper end into the holder then stretching the holder over the lower
STEP 4)
The rubber tube holder is then inserted into the hose barb with the test
tube arrow pointing down. Adjust the owmeter to the ow rate per the
chart on the following page and the required time. Start the test with the
water vapor test tube and work through the chart. Test Tube Breaker Sleeve
Test Tube Holder
Flowmeter
Regulator
1/4” Male Plug
Tube Contaminant Flow Rate CC/Min Test Time In Minutes
Gastec Sensidyne Gastec Sensidyne Gastec Sensidyne
6A 603SPA Water Vapor 100 500 10 1.4
2A 601SP Carbon Dioxide 100 100 5 3.5
1A 6005P Carbon Monoxide 100 175 3 2
109AD 6025P Oil Mist 500 470 40 25
WARNING!
Do not attempt to remove regulator while system is pressurized. Always test air quality after the lter system to assure
proper function. The periodic testing of CO levels does not substitute for a CO or high temperature alarm per OSHA reg-
ulations. We recommend the installation of a CO monitor in the breathing air system to continuously monitor for CO. Call
Air Systems’ customer service department to discuss a retrot for your system.
