Adjusting measurement, One point adjustment, Table 38 – Vaisala GMP231 User Manual
Page 67: Adjustment return codes
Chapter 5 _______________________________________________________________ I2C Interface
VAISALA ________________________________________________________________________ 65
Table 38
Adjustment Return Codes
Code Meaning
0
Ok
1
Function not supported
2
Sequence error
3
Recorded-Reference difference too large
4
2-point adjustment: Points too close
5
Given reference value is invalid
Adjusting Measurement
NOTE
Before implementing an adjustment sequence using the Adjust command,
read the general instructions for calibration and adjustment in section
Calibration and Adjustment on page 73.
Create the reference environment inside the chamber, and use the Adjust
command to perform the adjustment sequence.
Adjustment can fail for a number of reasons. Refer to the list of return
codes for the Adjust command in Table 38 above.
One Point Adjustment
To perform a one point adjustment of carbon dioxide (CO
2
),
measurement using I
2
C protocol, you must perform the following
sequence:
1.
Using the Adjust command, start 1 point adjustment for the
chosen parameter.
2.
Place the sensor in the reference environment and wait until the
measurement has stabilized.
3.
Using the Adjust command, record the measured point and give
the reference value.
4.
Use the Adjust command to end the adjustment.