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Instruction Manual
748467-A
January 2002
Rosemount Analytical Inc. A Division of Emerson Process Management Maintenance and Service 5-1
Model MicroCEM
SECTION 5
MAINTENANCE AND SERVICE
DANGER.
ELECTRICAL SHOCK HAZARD
Disconnect power to the module(s) prior to
replacing components.
WARNING
QUALIFIED PERSONNEL
This equipment should not be adjusted or
repaired by anyone except properly quali-
fied service personnel.
WARNING
PARTS INTEGRITY
Tampering with or unauthorized substitu-
tion of components may adversely affect
safety of this product. Use only factory-
approved components for repair.
5-1 OVERVIEW
The MicroCEM Analyzer Module requires very
little maintenance during normal operation.
Occasionally, the detector's reaction chamber
and sapphire window may require cleaning,
refer to Section 5-5.
White crystal deposits on the windows of the
reaction chamber and plugging of capillaries
and vent are usually due to sample contami-
nates such as ammonia reacting with the high
ozone levels and NO components. To elimi-
nate the contaminates, the sampling system
should be reworked or a preventive mainte-
nance program developed (if dropout is not
excessive). Another source of crystalline for-
mation is contaminated air.
Several components may require replace-
ment. These are discussed in the following
sections.