Operation Verification - 6400A Diagnostic Techniques; Fault Diagnosis With Test Variables; Table 9-1: Test Functions - Teledyne 6400A Instruction Manual

TAI Model 6400A SO

9.1 Operation Verification - 6400A Diagnostic Techniques

9.1.1 Fault Diagnosis with TEST Variables

The Table 9-1 indicates possible fault conditions that could cause the TEST functions to be
outside the acceptable range.

Table 9-1: Test Functions

Test Function
RANGE
STABIL
(table continued)
Analyzer Operator Manual, 02164, Rev. G
2
Factory Set-Up Comment
500 PPB This is the Range of the instrument. In standard configuration
all 2 outputs have the same range.
Dual range option allows different ranges for each output.
When enabled, there will be 2 range values displayed (range 1
and range 2).
Auto range option allows 2 different ranges for each channel,
and will automatically switch to the other range dynamically as
concentration values require. The TEST values will show the
range the instrument is currently operating in, and will
dynamically display the alternate range as the range changes
occur.
The instrument stability is computed for 25 samples with 10
seconds default interval time. The stability value should be
compared to the value observed in the factory check-out.
Faults that cause high stability values are:
Pneumatic leak
Low (below 600mV) or very unstable UV lamp output
Light leak
Faulty HVPS
Defective Preamp board (02107)
Aging detectors
PMT recently exposed to room light
Dirty/contaminated reaction cell
9-3