Appendix A: General Maintenance (continued)
Filter Check Continued
The other two filters are located in the water trap. The main filter is the A796-F
particle filter. This filter stops debris and dust from traveling down to the analyser.
The secondary filter is the A794-D water block filter. This filter stops flow in the event
the water trap fills with condensate. Refer to the picture below.
Open the water trap and look at the particle filter. The filter will typically get dirty from
the outside first. If the filter is dark on the outside a replacement filter should be
installed.
If the particle filter 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 analyser on as outlined on pages 11 to 14. Wait until the analyser has
completed the initial purge and sensor check and is operating normally prior to
proceeding to step 2.
2. With the pump running, cover the analyser gas inlet port with your finger. The
analyser should display “FLO ERR” and a rapid beeping should be heard.
If the analyser does not beep and does not display “FLO ERR” this may be an
indication the flow sensor requires calibration, the pump is faulty, or there is an
internal leak. The Technical Helpline should be contacted on 01293 530196 opt. 1
Water trap bowl. A796
water trap pictured. A796
water trap is similar but
longer
Particle Filter
A796-W
Water
Block Filter
Water trap lid. O-ring is
located in the lid recess
34
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