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Model GFC7000E Instruction Manual Calibration Procedures
04584 Rev A1 136
STEP THREE
: Perform the zero/span calibration. Zero and span checks using the zero/span
valve option are similar to that described in Section 3.3, 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 keys (CALZ &
CALS).
M-P CAL
STABIL=XXX.X PPM
CO2 =XXX.X
< TST TST >
ENTR
CONC
EXIT
M-P CAL
STABIL=XXX.X PPM
CO2 =XXX.X
< TST
TST
> CAL
CALZ
CALS SETUP
M-P CAL STABIL=XXX.X PPM CO2 =XXX.X
< TST TST > ZERO CONC EXIT
EXIT
returns to the main
SAMPLE display
ACTION:
Allow zero gas to enter the sample port at the
rear of the instrument.
M-P CAL STABIL=XXX.X PPM CO2 =XXX.X
< TST TST > SPAN CONC EXIT
M-P CAL RANGE = 500.000 PPM CO2 =XXX.X
< TST TST > ENTR SPAN CONC EXIT
M-P CAL RANGE = 500.000 PPM CO2 =XXX.X
< TST TST > ENTR CONC
EXIT
Wait until
STABIL
falls below1.0 ppb.
This may take several
minutes.
The
SPAN
key now
appears during the
transition from zero to
span.
You may see both keys.
If either the
ZERO
or
SPAN
buttons fail to
appear see Section 11
for troubleshooting tips.
SAMPLE* RANGE = 500.000 PPM CO2 =XXX.X
<TST
TST>
CAL
CALZ CALS SETUP
SAMPLE
STABIL=XXX.X PPM
CO2 =XXX.X
< TST
TST >
CAL
CALZ CALS SETUP
Set the Display to show the
STABIL
test function.
This function calculates the
stability of the CO
x
measurement
Press
ENTR
to changes the
OFFSET
&
SLOPE
values for the
CO
2
measurements.
Press
EXIT
to leave the calibration
unchanged and return to the
previous menu.
ACTION:
Allow span gas to enter the sample port at the
rear of the instrument.
The value of
STABIL
may jump
significantly.
Wait until it falls back
below
1.0 ppb.
This may take several
minutes.
Press
ENTR to
change the
OFFSET
&
SLOPE
values for the
CO
2
measurements.
Press
EXIT
to leave the calibration
unchanged and return to the
previous menu.