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Calibration Procedures Model GFC7001E Carbon Dioxide Analyzer
Teledyne Analytical Instruments 191
9.2.3. PERFORMING A BASIC MANUAL CALIBRATION
The following section describes the basic method for manually calibrating the GFC 7001E/EM.
If the analyzer’s reporting range is set for the AUTO range mode, a step will appear for selecting which range is
to be calibrated (LOW or HIGH). Each of these two ranges MUST
be calibrated separately.
9.2.3.1. Setting the Expected Span Gas Concentration
NOTE
When setting expected concentration values, consider impurities in your span gas.
The expected CO span gas concentration should be 80% of the reporting range of the instrument (see Section
6.6.1).
The default factory setting is 40 ppm. To set the span gas concentration, press:
Only appears if either
the O2 or CO2
Sensors are installed.
SAMPLE
O2 EXIT
SAMPLE RANGE=50.0PPM CO=XX.XX
< TST CAL MSG SETUP
M-P CAL RANGE=50.0PPM CO=XX.XX
<TST TST> ZERO SPAN
EXIT
SAMPLE
HIGH EXIT
The CO span concentration value is
automatically default to
4
.
If this is not the the concentration of
the span gas being used, toggle
these buttons to set the correct
concentration of the CO
calibration gas.
ignores the new
setting and returns to
the previous display.
accepts the new
setting and returns to
the
Only appears if the or
range modes are selected.
Use these keys to choose the
appropriate range.
Repeat entire procedure for each
range.
NOTE
For this Initial Calibration it is important to independently verify the PRECISE CO Concentration Value of
the SPAN gas.
If the source of the Span Gas is from a Calibrated Bottle, use the exact concentration value printed on
the bottle.