Draining Condensate From The Measuring Element; Changing Carrier Gas Cylinders - RMG PGC 9300 Operating Manual

Measuring element

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1.4.2

Draining condensate from the measuring element

There is a diaphragm filter on the measuring element with a condensate collection

container (Figure 6: Gas chromatograph PGC 9300Figure 5: Separation of Ex

zones, Pos. 6, one per gas stream, standard for biogas, optional for natural gas).

From time to time it is necessary to drain condensate from the drain valves under the

containers.

For this purpose, first close the corresponding inlet valve on the measuring ele-

ment and open the respective drain valve for about 10 seconds.

Danger

The line contains explosive gas under a line pressure of approx. 3 bar.

The interval is determined by the humidity of the measuring gas. The optimal interval

is determined by initially draining the condensate in short intervals (e.g. weekly). With

lower quantities of emerging condensate, the interval can be extended until the

amount of condensate is approximately half of the volume of the collecting container.

Caution

Do not open drain valves while an analysis is in progress, because this

causes a pressure drop in the measuring element and disturbs the analysis.

Instead, set the operating mode to "STOP" and wait until the end of the cur-

rent analysis or open during calibration (duration: about 10 min).

1.4.3

An inlet pressure of 5.5 bar for the carrier gas is required for operation of the PGC

9300. This value must not be undercut by more than 10%; any values below that

level will trigger an alarm. Since the carrier gas also has a protective function and

protects the measuring element from the penetration of oxygen, this situation should

never arise! However, if this should occur, the measuring element switches off auto-

matically in the range between 2 and 3 bar.

1 About this manual

Manual PGC 9300 EN07 June, 18th 2018

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