Vaisala HMP60 Guide de l'utilisateur télécharger pdf (Page 43)

Chapter 4 ________________________________________________________________ Operation

VAISALA _______________________________________________________________________ 41

Clear Adjustment of RH Measurement

Use the CRHCLR command to clear the adjustment of RH measurement

that has been done using the CRH command. This command is not

available on the HMP110T.

CRHCLR<cr>

Example:

crhclr

Calibrate Temperature Measurement

Use the CT command to perform a one-point or two-point temperature

(T) calibration. One-point calibration adjusts the offset for the

measurement, two-point calibration adjusts offset and gain.

CT [reference]<cr>

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

a single temperature reference and wait for 20 – 40 minutes for the

temperature to stabilize. To apply the adjustment, enter the CT command

with the reference temperature as a parameter.

Example: one-point calibration

ct 23.5

Giving the command without parameters starts the two-point calibration.

Remember to allow the temperature to stabilize for 20 - 40 minutes after

changing the reference. The first reference point must be smaller than the

second point, and the difference between the reference points must be

more than 30 ºC. To update the measured value while the command is

running, press enter without inputting a value.

Example: two-point calibration

T : 22.03 Ref1 ? 22

Press any key when ready ...

T : 55.12 Ref2 ? 55

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Vaisala HMP60 Guide de l'utilisateur Page 43