General Description; Diagnostic During Operation And Power-On; Starting Self-Test Manually - Agilent Technologies 8453 Operator's Manual

12 Troubleshooting

General Description

General Description
The Agilent 89090A temperature control accessory has sophisticated internal
diagnostics which cover most of the errors that are possible in the system.
These include plausibility checks on various analog lines (see Sensor
Electronic, description of ADC) which lead to error messages to help isolate
the defective parts.

Diagnostic During Operation and Power-On

A number of diagnostic functions are automatically executed during normal
operation and after turning on, see
information. If a malfunction is detected, depending on where it originated,
the power amplifier and/or the sensor electronic is automatically turned off.
During normal operation and after turning on you will only receive errors 110 through 118.
N O T E

Starting Self-Test Manually

In case you observe unusual operation of your instrument or receive an error
message, start the self-test manually:
1 Use the U
2 Select Self-test and press E
When executing the self-test you will receive the following message on your display:
N O T E
WARNING 2
prompting you to remove your sample cell from the cell holder, because temperatures are
not kept stable during self-test. Press E
self-test.
148 Temperature Control Accessory for Agilent 8453 UV-visible Spectrophotometer Operator's Manual
keys to display System Function and press E
and D
P OWN
NTER
"Error Messages" on page 152 for more
.
to continue the self-test or C
NTER
.
NTER
to stop the
LEAR