Filter
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Maintenance H25-IR
48 Instruction 3015-4342
5.4.4 Internal Filter Replacement
A filter located inside the instrument may become blocked due to dust or water being drawn into the
instrument. A blocked filter is identified by a “Search Flow Fault,” “Measure Flow Fault,” or a “No Flow”
fault occurring. Refer to Section
4.3 What to Do when a Fault Occurs.
Items Required:
• Replacement filter (P/N 3015-4415)
• Medium Phillips head screwdriver
Procedure:
1. Remove the instrument’s top cover as described in Section
5.4.1 Removing the Top Cover.
2. Remove the old filter by pulling off the tubing attached to the filter’s inlet and outlet ports.
3. Install the tubing removed in Step 2 onto the new filter.
4. Reassemble the instrument.