7. Enter the value of the first reference (for example, 0 if calibrating with a 0 ppmCO
2
reference gas) into the Reference value, point 1 field.
8. After you enter the reference value, the value of the Measured value, point 1 field
updates automatically.
9. Place the probe in the second reference environment (adjustment point 2) and wait
until the measurement has stabilized.
10. Enter the value of the second reference (for example, 2000 if calibrating with a 2000
ppmCO
2
reference gas) into the Reference value, point 2
field.
11. When both reference points have been entered, select Store adjustment to save the
adjustment.
12. Close the calibration mode with the Stop calibration button.
13. To check that the adjustment was carried out correctly, review the information in the
Adjustment data
fields at the bottom of the view.
Chapter 7 – Using GMP252 with Indigo Transmitters
83
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