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Maintenance Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments 184
8.3. Maintenance Procedures
The following procedures are to be performed periodically as part of the standard maintenance of the
Model GFC 7000TA.
8.3.1. Replacing the Sample Particulate Filter
The particulate filter should be inspected often for signs of plugging or contamination. We recommend
that when you change the filter, handle it and the wetted surfaces of the filter housing as little as possible.
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 7000TA’s hinged front panel and unscrew the knurled retaining ring on the filter
assembly.
Figure 8-1: 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, install 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.