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Instruction Manual
HAS60E-IM-HW
June 2007
NGA 2000 CLD
4 - 1Maintenance and ServiceEmerson Process Management GmbH & Co.OHG
SECTION 4
MAINTENANCE AND SERVICE
4-1 OVERVIEW
The CLD Analyzer Module requires very little mainte-
nance during normal operation.
The gas path system should be leak tested at least twice
a year and after maintenance, replacement or repair of
gas path parts.
Occasionally, the intake fan screen may require clean-
ing, refer to section 4-3.
Also, the detector´s reaction chamber and sapphire win-
dow may require cleaning, refer to section 4-7.
White crystal deposits on the windows of the reaction
chamber and plugging of capillaries and vent are usually
due to sample contaminates 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 maintenance program devel-
oped (if dropout is excessive). Another source of crys-
talline formation is contaminated air.
Several components may require replacement. These
are discussed in the following sections.
Tag each connector and its location before disconnect-
ing any wiring. This helps in reassembly.
Tampering with or unauthorized substitution of
components may adversely affect the safety of this
instrument. Use only factory documented/ap-
proved components for repair.
Because of the danger of introducing additional
hazards, do not perform any unauthorized modifi-
cation to this instrument!
CAUTION
Do not operate without covers secure.
Do not open while energized.
Disconnect power to the module(s)
prior to replacing components.
This equipment should not be adjusted
or repaired by anyone except properly
qualified service personnel.
WARNING
WARNING
Before starting work, read the "Essential instruc-
tions" on the inside cover and the Safety Summary
beginning on page P-2.
Failure to follow the safety instructions could re-
sult in serious injury or death.