Teledyne gfc 7000t manual Making The Pneumatic Connections, Model GFC7000T Carbon Dioxide Analyzer

Model GFC7000T Carbon Dioxide Analyzer

Table 4-1. Model GFC 7000T Pneumatic Connections

Rear Panel Label	Function
	Connect a gas line from the source of sample gas here.
SAMPLE	Calibration gasses are also inlet here on units without
	zero/span valve option installed.
EXHAUST	Connect an exhaust gas line of not more than 10 meters
	long here.
PRESSURE SPAN	On units with zero/span valve option installed, connect a
	gas line to the source of calibrated span gas here.
VENT SPAN	Not used
ZERO	On units with zero/span valve option installed, attach a
	gas line to the source of zero air here.
	This inlet supplies purge air to the GFC wheel housing
TO PURGE	Connect a source of dried air that has been scrubbed of
	CO2.
	This exhausts purge air to the GFC wheel housing.
FROM PURGE	Connect an exhaust gas line of not more than 10 meters
	long here. It is only used on the GFC 7000TU instrument.

4.2.MAKING THE PNEUMATIC CONNECTIONS

CAUTION

Venting should be outside the shelter or immediate area surrounding the instrument.

1.Attach a sample inlet line to the sample inlet port. The SAMPLE input line should not be more than 2 meters long.

2.Attach sources of zero air and span gas

3.Span Gas is a gas specifically mixed to match the chemical composition of the type of gas being measured at near full scale of the desired measurement range.

When CO2 measurements are to be made with the Teledyne Instruments Model GFC 7000T Analyzer it is recommended that you use a gas calibrated to have a CO2 content equaling 80% of the range of compositions being measured.

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