Teledyne GFC 7001EM operation manual Performing a Sample Flow Check, Cleaning the Optical Bench

Maintenance Model GFC7001E Carbon Dioxide Analyzer

12.3.4.PERFORMING A SAMPLE FLOW CHECK

CAUTION

GENERAL SAFETY HAZARD

Always use a separate calibrated flow meter capable of measuring flows in the 0 – 1000

cm3/min range to measure the gas flow rate though the analyzer.

DO NOT use the built in flow measurement viewable from the Front Panel of the

instrument. This measurement is only for detecting major flow interruptions such as

clogged or plugged gas lines.

See Figure 3-2 for sample port location.

1.Attach the Flow Meter to the sample inlet port on the rear panel. Ensure that the inlet to the Flow Meter is at atmospheric pressure.

2.Sample flow should be 800 cm3/min  10%.

3.Once an accurate measurement has been recorded by the method described above, adjust the analyzer’s internal flow sensors (See Section 9.6.3).

Low flows indicate blockage somewhere in the pneumatic pathway, typically a plugged sintered filter or critical flow orifice in one of the analyzer’s flow control assemblies. High flows indicate leaks downstream of the Flow Control Assembly.

12.3.5.CLEANING THE OPTICAL BENCH

The GFC 7001E/EM sensor assembly and optical bench are complex and delicate. Disassembly and cleaning is not recommended. Please check with the factory before disassembling the optical bench.

12.3.6.CLEANING EXTERIOR SURFACES OF THE GFC 7001E/EM

If necessary, the exterior surfaces of the GFC 7001E/EM can be cleaned with a clean damp cloth. Do not submerge any part of the instrument in water or cleaning solution.

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