8 – Routine maintenance MultiExact Gas Analyser
8.3 Inspecting the optional filter element (O
2
purity / control only)
If you only use the analyser on applications which use clean, dry gases, an inlet filter
may not be required. If however, your application requires a filter, it can be easily
checked.
1. Ensure the gas supply to the analyser is switched off.
2. Refer to Figure 96. Unscrew and remove the filter retainer cap (4).
3. Inspect the condition of the white filter element (2, fitted to the spigot on the rear
of the filter retainer cap). If the filter element is wet or dirty:
• Remove the used filter element from the filter retainer cap, and dispose of it.
• Push a new filter element onto the spigot on the inner side of the filter retainer
cap.
4. Inspect the 'O' ring (3) on the inner side of the filter retainer cap (4). If the 'O' ring
is twisted or damaged:
• Remove the 'O' ring, then dispose of it.
• Fit a new 'O' ring to the inner side the filter retainer cap.
5. Ensure that the 'O' ring (3) is correctly located in the recess in the inner side of
the filter retainer cap (4), then refit and tighten the filter retainer cap.
Do not operate the analyser with the filter element removed. If you do,
particulates in the sample gas may seriously damage the analyser.
1. Filter fitting
2. Filter element
3. 'O' ring
4. Filter retainer cap
Figure 96 – Inspect the inlet filter element (O
2
purity and control transducers only)
80 05410001A / Revision 6
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