Troubleshooting & Repair Procedures; General Troubleshooting Hints - Teledyne 300E Instruction Manual

Model 300E Carbon Monoxide Analyzer
Instruction Manual
11. TROUBLESHOOTING & REPAIR
PROCEDURES
This section contains a variety of methods for identifying the source of performance
problems with the analyzer. Also included in this section are procedures that are
used in repairing the instrument.

11.1. General Troubleshooting Hints

The analyzer has been designed so that problems can be rapidly detected,
evaluated and repaired. During operation, the analyzer continuously performs self-
check diagnostics and provides the ability to monitor the key operating parameters
of the instrument without disturbing monitoring operations.
A systematic approach to troubleshooting will generally consist of the following four
steps:
1. Note any WARNING MESSAGES and take corrective action as required.
2. Examine the values of all TEST functions and compare to Factory values. Note
any major deviations from the factory values and take correction action as
required.
3. Use the Internal Electronic Status LED's to determine whether the CPU and I
buses are running, and if the Sync/Demodulator and Relay Board are
operating properly. Verify that the DC power supplies are operating properly
by checking the voltage test points on the Relay Board. Please note that the
analyzer's DC power wiring is color-coded and these colors match the color of
the corresponding test point on the relay board.
4. SUSPECT A LEAK FIRST! Data from T-API's Service Department indicates
that 50% of ALL problems are eventually traced to leaks in the pneumatic
connections and gas lines of the analyzer itself, the source of Zero Air or Span
Gases or Sample Gas delivery system.
P/N 04288 REV: A
The operations outlined in this chapter are to be performed by
qualified maintenance personnel only.
Risk of electrical shock. Disconnect power before performing the
following operations.
TROUBLESHOOTING & REPAIR PROCEDURES
NOTE
CAUTION
2
C
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