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Maintenance Model GFC7001E Carbon Dioxide Analyzer
Teledyne Analytical Instruments 264
12.3. MAINTENANCE PROCEDURES
The following procedures are to be performed periodically as part of the standard maintenance of the GFC
7001E.
12.3.1. REPLACING THE SAMPLE PARTICULATE FILTER
The particulate filter should be inspected often for signs of plugging or contamination. We recommend that the
filter and the wetted surfaces of the filter housing are handled as little as possible when you change the filter. Do
not touch any part of the housing, filter element, PTFE retaining ring, glass cover and the o-ring.
To change the filter:
1. Turn OFF the analyzer to prevent drawing debris into the instrument.
2. Open the GFC 7001E Analyzer’s hinged front panel and unscrew the knurled retaining ring on the filter
assembly.
Figure 12-1: Sample Particulate Filter Assembly
3. Carefully remove the retaining ring, PTFE o-ring, glass filter cover and filter element.
4. Replace the filter, being careful that the element is fully seated and centered in the bottom of the holder.
5. Re-install the PTFE o-ring (with the notches up), the glass cover, then screw on the retaining ring and
hand tighten. Inspect the seal between the edge of filter and the o-ring to assure a proper seal.
6. Re-start the Analyzer.
12.3.2. REBUILDING THE SAMPLE PUMP
The diaphragm in the sample pump periodically wears out and must be replaced. A sample rebuild kit is
available – see label on pump for the part number of the pump rebuild kit. Instructions and diagrams are
included with the kit.
Always perform a Flow and Leak Check after rebuilding the Sample Pump.