To Reconfigure The Epc Module For Another Detector - Agilent Technologies 7820A Operating Manual

6
Configuration Tasks

To Reconfigure the EPC Module for Another Detector

62
Agilent provides a configurable flow module that supplies
gas flows to the detectors installed in the GC. However,
since the 7820A GC is a single channel instrument, a single
flow module can supply gases to only one detector at a time.
If you have one detector flow module and two detectors, and
wish to switch the detector used, reconfigure the flow
module as described below.
If you have two detectors and two flow modules, you do not
need to perform this procedure.
To reconfigure the GC to use a detector flow module with
another detector:
Determine the gas types needed for the new detector. The
1
new detector may require changes to the gas supply
plumbing. Prepare the tubing and gas supplies before
beginning. See the
details and the Site Preparation Guide
requirements.
Connect to the GC with the software keypad.
2
Cool down the detector in use. The detector must be cool
3
in order to prevent damage during the changeover.
If changing the carrier gas, or if you will need to
disconnect or shut off the carrier gas supply in order to
change detector gases, also cool down the inlet and oven.
Turn off the detector flows. If changing detector gas
4
types, also shut off detector gas supplies.
Close any online data system session for this GC.
5
Remove the detector cover.
6
7 Remove the pneumatics cover to expose the detector flow
modules. See Figure
Installation Guide for gas plumbing
1.
supply
Operating Guide