Appendix A: General Maintenance (continued)
Filter Check Continued
The other two filters are located in the water trap (p/n A796). The main filter is
the A762F particle filter. This filter stops debris and dust from traveling down to
the analyzer. The secondary filter is the A794W water block filter. This filter
stops flow in the event the water trap fills with condensate. Refer to the picture
below.
Visually inspect the A762F particle filter. If the filter is discolored on the inside
or outside a replacement filter should be installed.
If the A762F is clean but saturated with water a replacement should be installed
to ensure proper flow. The saturated filter can be left to dry and reused later.
Pump Operation Check
1. Turn the analyzer on as outlined on page 8. Do not connect anything to the
inlet. Wait until the analyzer has completed the initial purge and sensor check
and is operating normally prior to proceeding to step 2.
2. Cover the analyzer inlet with your finger. The analyzer should display “FLO
ERR” and a rapid beeping should be heard.
If the analyzer does not beep and display “FLO ERR” this may be an indication
the flow sensor requires calibration, the pump is faulty, or there is an internal
leak. The analyzer should be returned for factory service.
Water trap bowl.
A762F
Particle Filter
A794W
Water
Block Filter
Water trap lid. O-ring is
located in the lid recess
Exploded View of A796 Water Trap
33
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