Adjustment in 3 points, Example of the 2-point adjustment procedure – Vaisala GMP343 User Manual
Page 67
Chapter 5 __________________________________________________ Calibration and Adjustment
VAISALA_______________________________________________________________________ 65
Adjustment in 3...8 Points
First carry out checking the compensations and perform the reference gas
measurements as instructed in the previous section,
Adjustment by the User on page 62
1.
Feed the readings (Reading?) and the corresponding concentrations
(Reference?) with the command
MPCI
2.
Confirm the adjustment and the new correction values with the
command
MPC ON
3.
Save the settings with the command
SAVE
Saves parameters and settings to EEPROM-memory.
Example of the 2-Point Adjustment Procedure
The following section presents an example of the 2-point adjustment
procedure with reference gas concentrations of 0 ppm and 1007 ppm.
1.
First turn on the calibration mode for measuring reference gases.
>
>calib on
Calibration mode started.
Use CALIB OFF to stop the mode.
2.
The GMP is now measuring the first reference gas (0 ppm). Use
command R and let the reading stabilize for several minutes.
Calculate the average reading (reading 1).
>
r
...28.2
28.2
28.1
28.1
28.2
NOTE
Use the actual concentrations given usually in the side of the gas bottle.
For example, a gas with a nominal 1000 ppm CO
2
concentration might
actually contain 1007 ppm CO
2
.