Service Mode Overview; Detector Diagnostics - Agilent Technologies 7820A Service Manual

Service mode overview

Detector diagnostics

276
Agilent 7820 GC Service
Service mode generates a series of tables that include
information that can help with diagnosing problems. For
example, the detector signal board diagnostic includes
information to verify a short in an FID ignitor. It also contains a
measurement of the Noise in the signal output.
To access the service mode diagnostics:
1 Press [Service Mode].
Scroll to Diagnostics and press [Enter].
The list of diagnostics that are available vary with your
configuration. Here is an example of a GC with 2 inlets, 2
detectors, and a PCM module.
DIAGNOSTICS
Instrument status
Front inlet
Back inlet
Front detector
Back detector
Pcm B
Thermal PID control
Electronics
Communications
For example, the detector signal board diagnostic includes
information to verify a short in an FID ignitor. It also contains a
measurement of the Noise in the signal output.
To access the detector diagnostics:
1 Press [Service Mode].
Scroll to Diagnostics and press [Enter].