Troubleshooting & Maintenance
Hardware Installation and Maintenance Manual B
–7
11. With gentle, uniform pressure, wipe the mirror from one edge to the
other with the cleaning cloth only once and only in one direction to
remove the contamination. Discard the cloth.
12. Repeat with a clean sheet of lens cleaning cloth to remove the streak
left by the first wipe. Repeat, if necessary, until there is no visible
contamination on the mirror.
13. Carefully replace the mirror assembly onto the cell in the same
orientation as previously marked making sure the O-ring is properly
seated.
14. Tighten the socket-head cap screws evenly with a torque wrench to
13 in-lbs.
Toreplacethestainlesssteelmirror
If your system has been configured with a stainless steel mirror in the 0.1 m
or 0.8 m measurement cell, use the following instructions for replacing the
mirror.
1. Power down the analyzer following the procedure outlined in the
section called “Powering Down the Analyzer” in the Firmware
Operator’s Manual.
2. Isolate the analyzer from the sample bypass flow by shutting off the
appropriate valve(s) and/or pressure regulator.
3. If possible, purge the measurement cell with nitrogen for 10
minutes.
Never rub an optical surface, especially with dry tissues, as this
can mar or scratch the coated surface.
If stainless steel mirrors are replacing another version of mirror in
the field, such as glass, the analyzer may need to be returned to
the factory for re-calibration to ensure optimal cell function. Refer
to “Service Contact” on page B-23.
All valves, regulators, switches, etc. should be operated in
accordance with site lock-out/tag-out procedures.
Process samples may contain hazardous material in potentially
flammable and/or toxic concentrations. Personnel should have a
thorough knowledge and understanding of the physical properties
and safety precautions for the sample contents before operating
the SCS.
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