Repairing the Anesthetic Gas Module 9 Anesthetic Gas Module
239
Sample Cell
Removal
To remove the sample cell (refer to Figure 62, Figure 63, Figure 64 and Figure 65):
1 Stand the IR measurement mounting bracket on end, towards the main PC board (refer to “Lifting
the IR Measurement Mounting Bracket” on page 233).
2 Remove the pneumatic connections (1) from the sample cell, which are located on top of the IR
measurement assembly head.
3 Using a cross-tipped screwdriver, remove the four screws (2) securing the sample cell cover plate
and bracket (3) from the IR measurement assembly head. Retain these parts for later replacement.
4 Lay the IR measurement assembly head flat and, using a flat-tipped screwdriver, apply pressure
from above to the overlapping part (4) of the sample cell cover, and pry it off.
5 Carefully withdraw the sample cover and bracket (5) from the IR measurement head.
6 Using a cross-tipped screwdriver, remove the screw (6) securing the clamping plate (7) to the
sample cell bracket (8).
7 Remove the sample cell (9).
Replacement
To replace the sample cell (refer to Figure 62, Figure 63, Figure 64 and Figure 65):
1 Position the sample cell (9) onto its bracket (8) and hold it in place with the clamping plate (7).
2 Using a cross-tipped screwdriver, replace the screw (6) securing the clamping plate to the bracket.
Before tightening the screw, ensure that the pipes to the sample cell are aligned parallel with the
sides of the bracket.
NOTE Make sure the temperature sensor has not slipped out of its hole. This can prevent the bracket from
being pushed home.
3 Insert the sample cell bracket and cover (5) into the base of the IR measurement assembly head.
Push the bracket home so that the surface of the cover plate is flush with the base of the IR
measurement head. The two gas tubes should now protrude from the holes (1) on top of the IR
measurement head.
4 Using a cross-tipped screwdriver, replace the four screws (2) securing the sample cell cover plate
and bracket (3) to the IR measurement assembly head.
5 Replace the pneumatic connections (1) to the sample cell, which are located on top of the IR
measurement head.
NOTE Check that all tubing is tightly connected and show no signs of damage.
6 Replace the IR measurement mounting bracket (refer to “Lifting the IR Measurement Mounting
Bracket” on page 233).
NOTE After replacing the sample cell, check that all flat-cable connectors are firmly seated and show no signs
of damage.
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