Vaisala GMK220 - Manual (Page 13)

Chapter 3_____________________________________________________________________ Operation
VAISALA ____________________________________________________________________________11
12. Give the input data for the calibration.
CALICALI H
2
concentration >
ambient
>
ambient
>
where CO
2
concentration is given in ppm, P
ambient
is given in hPa and
T
ambient
is given in
°
C.
The sample quantity determines the number of measurements of
which averages are calculated. The sample quantity is recommended
to be at least 200.
NOTE The character after the CALICALI command is case-sensitive i.e. it has
to be given as capital letter (CALICALI H).
Example:
>CALICALI H 200 30000 1013 25
Calibration start - Length is 200 samples (it takes
about 107 seconds)
You can interrupt operation by CTRL-C
1139.3 1219.3 1.0 1.4 32.5
1137.6 1217.3 1.0 1.3 32.5
...
1137.7 1219.7 1.0 1.1 32.5
1137.0 1216.8 1.0 1.1 32.5
Noise measurement ready
Res Avg = 0.999947
Res Std = 0.001777
FR Avg = 1.165917
FR Std = 0.101676
Rx Avg = 1138.306737
Rx Std = 1.732051
Tx Avg = 1218.396783
Tx Std = 1.837117
PC_METHOD=3
PC_R0=1138.306737
PC_T0=485.501432
PC_RS=1138.306737
PC_TS=1958.435059
High gas ( 30000.0 ppm) ready. Two point calibration
completed.
>
13. As the calibration is completed, save the calibration parameters to
the non-volatile memory in the probe.