Maintenance
91518 Multigas Analyzer Service Manual 4-6
Figure 4-4: O-rings correctly seated in post grooves
Reference Gas Block Replacement
The reference gas connection block and filter is located to the right of the water trap.
To replace the reference gas connection block:
1 Peel off the label (; refer to Figure 4-5) that covers the screw, and then remove the screw.
Figure 4-5: Reference gas block label
Note:
A small O-ring is located between the filter unit and the front panel.
The filter element is sealed inside the block. Replacing the filter requires replacement of the entire block. There
is no replaceable filter in the block.
2 Install the new O-ring in the recess of the block, and carefully align the replacement block with the front
panel.
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