Zero/span calibration on auto range or dual ranges – Teledyne GFC-7000T - Trace CO2 Analyzer - manual User Manual
Page 190
Calibration Procedures
Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments
172
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 buttons the user is prompted for the
range that is to be calibrated as seen in the CALZ example below:
M-P CAL
STABIL=XXX.X PPM
CO2 =XXX.X
< TST
TST
>
CAL
CALZ
CALS SETUP
ACTION:
Allow zero gas to enter the sample port at the
rear of the instrument.
Wait until STABIL
falls below 1.0 ppm.
This may take several
minutes.
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
2
measurement
Continue Calibration as per
Standard Procedure
ZERO CAL M
RANGE = 500.000 PPM CO2 =XXX.X
< TST TST >
ZERO
SPAN
CONC
EXIT
ANALYZER ENTERS
ZERO CAL MODE
SAMPLE
RANGE TO CAL: LOW
LOW
HIGH
ENTR SETUP
SAMPLE
RANGE TO CAL: HIGH
LOW HIGH
ENTR
SETUP
Once this selection is made, the calibration procedure continues as previously described in Section 7.2.
The other range may be calibrated by starting over from the main SAMPLE display.