Calibration Procedures

Model GFC7001E Carbon Dioxide Analyzer

For each mode, there are seven parameters that control operational details of the SEQUENCE (see Table 9-3).

 

Table 9-3: AutoCal Attribute Setup Parameters

 

 

 

 

ATTRIBUTE

 

 

ACTION

TIMER ENABLED

 

Turns on the Sequence timer.

STARTING DATE

 

Sequence will operate after Starting Date.

STARTING TIME

 

Time of day sequence will run.

DELTA DAYS

 

Number of days to skip between each Sequence execution.

 

If set to 7, for example, the AutoCal feature will be enabled once every

 

 

 

week on the same day.

 

 

Number of hours later each “Delta Days” Seq is to be run.

 

 

If set to 0, the sequence will start at the same time each day. Delta

DELTA TIME

 

Time is added to Delta Days for the total time between cycles.

 

This parameter prevents the analyzer from being calibrated at the same

 

 

 

 

 

daytime of each calibration day and prevents a lack of data for one

 

 

 

particular daytime on the days of calibration.

 

 

Number of minutes the sequence operates.

 

 

This parameter needs to be set such that there is enough time for the

DURATION

 

concentration signal to stabilize.

 

The STB parameter shows if the analyzer response is stable at the end

 

 

 

 

of the calibration.

 

 

This parameter is logged with calibration values in the iDAS.

CALIBRATE

 

Enable to do a calibration – Disable to do a cal check only.

 

This setting must be OFF for analyzers used in US EPA applications and

 

 

 

with internal span gas generators installed and functioning.

RANGE TO CAL

 

LOW calibrates the low range, HIGH calibrates the high range. Applies only

 

to auto and remote range modes; this property is not available in single and

 

 

independent range modes.

NOTE

The CALIBRATE attribute (formerly called “dynamic calibration”) must always be set to OFF for analyzers used in US EPA controlled applications that have internal span gas generators option installed.

Calibration of instruments used in US EPA related applications should only be performed using external sources of zero air and span gas with an accuracy traceable to EPA or NIST standards and supplied through the analyzer’s sample port.

Teledyne Analytical Instruments

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Teledyne GFC 7001EM operation manual AutoCal Attribute Setup Parameters, Attribute Action