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Model GFC7000E Instruction Manual Calibration Procedures
04584 Rev A1 137
7.5. Manual Calibration Checks with Zero/Span Valves
Zero and span checks using the VARIOUS zero/span valve options available for the MGFC7000E
are similar to that described in Section 7.3, except that the zero and calibration operations are
initiated directly and independently with dedicated keys 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
ppb.
This may take
several minutes.
The value of STABIL
may jump
significantly. Wait
until
STABIL
falls
below
1.0 ppb. 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
CO2 readings
presented in the
upper right corner of
the display.
SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX
< TST TST > CAL CALZ CALS SETUP
Scroll to the STABIL test
function.
7.5.1. Zero/Span Calibration on Auto Range or Dual Ranges
If the analyzer is being operated in dual range mode or auto range mode, then the high and low
ranges must be independently calibrated.
When the analyzer is in either dual or auto range modes the user must run a separate calibration
procedure for each range. After pressing the CAL, CALZ or CALS keys the user is prompted for
the range that is to be calibrated as seen in the CALZ example below: