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089770000 Rev 05
Teledyne API N500 CAPS NO
X
Analyzer with NumaView™ Software
75
The analyzer has been designed so that problems can be rapidly detected, evaluated and
repaired. During operation, it continuously performs diagnostic tests and provides the
ability to evaluate its key operating parameters without disturbing monitoring operations.
A systematic approach to troubleshooting will generally consist of the following five
steps:
1. Note any Alerts and take corrective action as necessary (see Table 5-3).
2. Examine the values of all basic functions in the Dashboard and compare them
to factory values. Note any major deviations from the factory values and take
corrective action.
3. Use the internal electronic status LEDs to determine whether the electronic
communication channels are operating properly.
•
Verify that the DC power supplies are operating properly by checking the
voltage test points on the relay PCA.
•
Note that the analyzer’s DC power wiring is color-coded and that these
colors match the color of the corresponding test points on the relay PCA.
4. Suspect a leak first!
•
Customer service data Indicates that the majority of all problems are
eventually traced to leaks in the internal pneumatics of the analyzer or the
diluent gas and source gases delivery systems.
•
Check for gas flow problems such as clogged or blocked internal/external
gas lines, damaged seals, punctured gas lines, damaged / malfunctioning
pumps, etc.
5. Follow the procedures defined in Section 2.3.4.3 to confirm that the analyzer’s
vital functions are working.
FAULT DIAGNOSIS WITH ALERTS
Table 5-3 lists brief descriptions of warning Alerts that may occur during start up and
describes their possible causes for diagnosis and troubleshooting.
It should be noted that if more than two or three warning Alerts occur at the same time, it
is often an indication that some fundamental sub-system (power supply, relay PCA,
motherboard) has failed rather than an indication of the specific failures referenced by the
warnings.
Table 5-3. Warning Alerts, Fault Conditions and Possible Causes
WARNING
FAULT CONDITION
POSSIBLE CAUSES
AUTO REF WARNING
AREF value outside allowable
limit.
Drift in baseline loss due to large leak.
Sample filter bypassed. Mirrors may be dirty –
contact Technical Support to confirm
CANNOT DYN SPAN
1
Dynamic Span operation failed.
(Contact closure span calibration
failed while
DYN_SPAN
was set
to
ON
).
Measured concentration value is too high or
low
Concentration Slope value to high or too low
CANNOT DYN ZERO
2
Dynamic Zero operation failed.
(Contact closure zero calibration
failed while
DYN_ZERO
was set
to
ON
).
Measured concentration value is too high
Concentration Offset value to high
Содержание N500
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