Gas Chromatograph - RMG PGC 9300 Operating Manual

3.5 Gas chromatograph

Figure 7: Gas (distribution principle diagram) and Figure 8: Gas distribution (photo)
show the layout of the analysis unit located in the pressure-proof housing (Pos. 1).
This is composed of three essential functional units for each channel:
− Pressure regulation / valve actuation
This unit includes pressure regulation and monitoring for the carrier gas pres-
sure upstream from the columns and the control valves for the injector.
The setting is adjusted at the factory during the basic calibration of the device.
− Column modules
Each column module comprises an injector, a reference and measurement col-
umn, heat conductivity detectors, column heating, injector heating and, if appli-
cable, a back flush unit for column C (molecular sieve column).
− Electronic unit
This unit consist of an analog and a digital part as well as a communication unit.
Data recording and preparation, temperature regulation, pressure monitoring
and communication with the main board take place here. The main board is re-
sponsible for the evaluation of the chromatogram and for the transmission of all
measurement data to the analytical computer.
3 Gas chromatograph PGC 9300
Manual PGC 9300 EN07 June, 18th 2018
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