Vaisala HUMICAP DMT132 Guide de l'utilisateur télécharger pdf (Page 45)

Chapter 4 ________________________________________________________________ Operation

VAISALA _______________________________________________________________________ 43

Example (enable the LED indicator at dewpoint above 20 °C):

>alarm on 20

Alarm level : 20.000000

Saving settings...done

Calibration and Adjustment Commands

Commands that have to do with calibration and adjustment on the serial

line are described below. For the calibration and adjustment procedures,

see section Calibration and Adjustment on page 52.

Calibrate Humidity Measurement

Use the RHCAL command to perform a one-point or two-point humidity

(RH) calibration.

RHCAL<cr>

When performing a one-point calibration, you need to place the

transmitter in a single humidity reference with RH < 50%. Run the

command and enter the exact RH of the reference after the measurement

has stabilized. Exit the command by pressing the ESC key before

proceeding to the second point (see example 1 below). To update the

value, press ENTER without inputting a value.

For two-point calibration, the first point requires a RH < 35% humidity

reference, the second point must be RH > 50%.

Example (one-point calibration):

>rhcal

RH: 11.278554 Ref1 ? 11.3

Press any key when ready

Saving settings...done

Example (two-point calibration):

>rhcal

RH: 11.278554 Ref1 ? 11.3

Press any key when ready

RH: 75.091213 Ref2 ? 75

Saving settings...done

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Vaisala HUMICAP DMT132 Guide de l'utilisateur Page 45