Teledyne GFC7001T User Manual download pdf (Page 103)

SetupTeledyne API – Model T300/T300M CO Analyzer

Teledyne Analytical Instruments 103

5.4.4. RANGE UNITS

The GFC7001T/GFC7001TM can display concentrations in parts per million (10

mols

per mol, PPM) or milligrams per cubic meter (mg/m

, MG). Changing units affects all

of the display, COMM port and DAS values for all reporting ranges regardless of the

analyzer’s range mode. To change the concentration units:

IMPORTANT

IMPACT ON READINGS OR DATA

In order to avoid a reference temperature bias, the analyzer must be

recalibrated after every change in reporting units.

IMPORTANT

IMPACT ON READINGS OR DATA

Concentrations displayed in mg/m

and ug/m

use 0° C and 760 mmHg for

Standard Temperature and Pressure (STP). Consult your local regulations

for the STP used by your agency.

(Example: US EPA uses 25

C as the reference temperature).

Once the Units of Measurement have been changed from volumetric (ppb or

ppm) to mass units (µg/m

or mg/m

) the analyzer MUST be recalibrated, as

the “expected span values” previously in effect will no longer be valid.

Simply entering new expected span values without running the entire

calibration routine IS NOT sufficient.

This will also counteract any discrepancies between STP definitions.

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Teledyne GFC7001T User Manual Page 103