Emerson MicroCEM - Manual (Page 83)

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.