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Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments 171
7.5. Manual Calibration Checks with Zero/Span Valves
Zero and span checks using the VARIOUS zero/span valve options available for the GFC 7000TA are
similar to that described in Section 7.3, except that the zero and calibration operations are initiated
directly and independently with dedicated buttons CALZ and CALS.
To perform a manual calibration check of an analyzer with a valve option installed, use the following
method.
STEP ONE: Connect the sources of Zero Air and Span Gas as shown in Figures 7-3 through 7-6.
STEP TWO: Perform the zero/span check.
Wait until STABIL
falls below 1.0
ppm.
This may take
several minutes.
The value of STABIL
may jump
significantly. Wait
until STABIL falls
below 1.0 ppm. This
may take several
minutes.
SPAN CAL M STABIL=XXX.X PPM CO2 =X.XXX
< TST TST > ZERO SPAN CONC EXIT
SAMPLE STABIL=XXX.X PPM CO2 =X.XXX
< TST TST > CAL CALZ CALS SETUP
ZERO CAL M STABIL=XXX.X PPM CO2 =X.XXX
< TST TST > ZERO CONC EXIT
SAMPLE STABIL=XXX.X PPM CO2 =X.XXX
< TST TST > CAL CALZ CALS SETUP
EXIT returns to the main
SAMPLE dis
p
la
y
ACTION:
Record the
CO2 readings
presented in the
upper right corner of
the display.
ACTION:
Record the
CO
2
readings
presented in the
upper right corner of
the display.
SAMPLE* RANGE = 500.000 PPM CO
2
=X.XXX
< TST TST > CAL CALZ CALS SETUP
Scroll to the STABIL test
function.