Maintenance and Troubleshooting
Hardware Installation and Maintenance Manual B
–9
7. Obtain the new stainless steel mirror. Refer to Figure B–3 below.
8. Check the O-ring.
a. If a new O-ring is needed, apply grease on fingertips and then
to the new O-ring.
b. Place newly greased O-ring into the groove around the outside
of the mirror taking care not to touch the mirror surface.
9. Carefully place the new stainless steel mirror onto the cell making
sure the O-ring is properly seated.
10. Tighten the socket-head cap screws evenly with a torque wrench to
13 in-lbs.
Pressure Sensor Replacement
A pressure sensor may need to be replaced in the field as a result of one or
more of the following conditions:
• Loss of pressure reading
• Incorrect pressure reading
• Pressure sensor not responding to pressure change
• Physical damage to the pressure sensor
Toreplacethepressuresensorona8mor28mcell
Use the following instruction to replace a pressure sensor on a 8 m or 28 m
measurement cell.
Tools and materials
• Acetone-impenetrable gloves (North NOR CE412W Nitrile Chemsoft™
CE Cleanroom Gloves or equivalent)
• 9/16 in. wrench
Figure B–3 Stainless steel mirror - mirror side up
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