GT-FIRE
PORTABLE GAS DETECTOR
67816
Revision D
36
6.3. Replacing the Filters
The monitor is fitted with dust and hydrophobic filters. These protect the monitor from the ingress
of dust and moisture. The filters are located in the probe and must be inspected periodically for
contamination or damage.
WARNING: A LEAK CHECK MUST BE PERFORMED AFTER ANY FILTER
REPLACEMENT.
6.3.1. Dust Filter
1. Unscrew the dust filter holder and detach it from the probe adaptor, as illustrated in
Figure 43:
Dust Filter Holder / Filter Removal
.
2. Remove and discard the dust filter.
Caution: Always replace a dirty Dust Filter. Never rotate and reuse as
this can introduce contaminants into the monitor.
3. Insert a new dust filter (Part No. 67163) in the dust filter holder until fully seated.
4. Check the dust filter washer and replace if damaged (Part No. 67189).
5. Reattach the dust filter holder to the adaptor and secure.
Note: Do not overtighten the dust filter holder.
6. Switch ON the monitor and check that a ‘FLOW FAULT’ is displayed when the probe inlet is
blocked (while pump is running).
7. If ‘FLOW FAULT’ is not displayed, check tightness of all fittings.
Figure 43: Dust Filter Holder / Filter Removal
