Vaisala GMK220 User Manual download pdf (Page 12)

User's Guide __________________________________________________________________________

10 _________________________________________________________________________ U421EN-1.1

9. Give the input data for the calibration.

CALICALI L <sample quantity><CO

concentration >

ambient

><T

ambient

><cr>

where CO

concentration is given in ppm, P

ambient

is pressure given in

hPa and T

ambient

is temperature 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 L).

Example:

>CALICALI L 200 0 1013 23<cr>

Calibration start - Length is 200 samples (it takes

about 107 seconds)

You can interrupt operation by CTRL-C

1297.5 550.4 382.7 445.5 32.5

1295.2 554.5 482.0 445.9 32.5

...

1298.1 561.7 603.5 449.6 32.5

1296.9 557.3 523.4 454.2 32.5

Noise measurement ready

Res Avg = 470.491219

Res Std = 82.244873

FR Avg = 447.789145

FR Std = 2.355181

Rx Avg = 1296.441917

Rx Std = 1.870829

Tx Avg = 554.371452

Tx Std = 3.844639

Low gas ( 0 ppm) measurement done. Start high gas.

10. As the calibration at low end is completed, the software asks to

change to the high gas.

11. Adjust the flow rate of the high end gas to 0.6 l/min with a

screwdriver (item 4, Figure 1). Flush the chamber with the gas for 5

minutes.

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Vaisala GMK220 User Manual Page 12

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