Teledyne GFC 7001E User Manual download pdf (Page 186)

Calibration Procedures Model GFC7001E Carbon Dioxide Analyzer

Teledyne Analytical Instruments 186

Contact your regional EPA or other appropriate governing agency for more detailed recommendations.

9.1. BEFORE CALIBRATION

The calibration procedures in this section assume that the range mode, analog range and units of measure have

already been selected for the analyzer. If this has not been done, please do so before continuing (see Section

6.6 for instructions).

NOTE

If any problems occur while performing the following calibration procedures, refer to Section 12 for

troubleshooting tips.

9.1.1. REQUIRED EQUIPMENT, SUPPLIES, AND EXPENDABLES

Calibration of the GFC 7001E/EM Analyzer requires a certain amount of equipment and supplies. These include,

but are not limited to, the following:

 Zero-air source.

 Span gas source.

 Gas lines - All Gas lines should be PTFE (Teflon), FEP, glass, stainless steel or brass.

 A recording device such as a strip-chart recorder and/or data logger (optional). For electronic

documentation, the internal data acquisition system iDAS can be used.

NOTE

If any problems occur while performing the following calibration procedures, refer to Section 12 of this

manual for troubleshooting tips.

9.1.2. CALIBRATION GASES

9.1.2.1. Zero Air

Zero air or zero calibration gas is defined as a gas that is similar in chemical composition to the measured

medium but without the gas to be measured by the analyzer.

For the GFC 7001E/EM zero air should contain less than 25 ppb of CO and other major interfering gases such

as CO and Water Vapor. It should have a dew point of -5C or less.

If your application is not a measurement in ambient air, the zero calibration gas should be matched to the

composition of the gas being measured.

 Pure nitrogen (N

) can be used as a zero gas for applications where CO is measured in nitrogen.

 If your analyzer is equipped with an external zero air scrubber option, it is capable of creating zero air from

ambient air.

For analyzers without the zero air scrubber, a zero air generator such as the Teledyne’s M701 can be used.

Please visit the company website for more information.

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Teledyne GFC 7001E User Manual Page 186