Teledyne GFC-7000T - Trace CO2 Analyzer - manual - Manual (Page 187)

Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments 169
STEP TWO: Set the expected CO
2
Span Gas concentration:
This sequence causes the
analyzer to prompt for the
expected CO
2
span
concentration.
M-P CAL CO2 SPAN CONC: 450.000 Conc
0 0 0 4 5 .0 ENTR EXIT
M-P CAL RANGE = 500.000 PPM CO2 =X.XXX
< TST TST > ZERO CONC EXIT
SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX
< TST TST > CAL CALZ CALS SETUP
The CO
2
span
concentration values
automatically default to
400.0 Conc .
To change this value to
the actual concentration of
the span gas, enter the
number by pressing the
button under each digit
until the expected value
appears.
EXIT ignores the new setting
and returns to the previous
display.
ENTR accepts the new setting
and returns to the
previous display.
NOTE
For this Initial Calibration it is important to independently verify the PRECISE CO
2
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.
STEP THREE: Perform the zero/span calibration. Zero and span checks using the zero/span valve
option are similar to that described in Section 7.2, except that zero air and span gas is supplied to the
analyzer through the zero/span valves rather than through the sample inlet port.
The zero and cal operations are initiated directly and independently with dedicated buttons (CALZ &
CALS
).