Vaisala HMP243 Guide de l'utilisateur télécharger pdf (Page 76)

HMP240

Appendix 1: Serial commands M210300en

The command can also be divided into two commands, so the computer can be

used for other purposes while waiting for the sensor to stabilize to the higher

humidity.

>FCRH 1 <cr>

RH : 1.90 Ref1 ? 11.3 <cr>

FCRH 2 <cr> ...

RH : 76.30 Ref2 ? 74.9 <cr>

If the stabilization of the sensor to the humidity in the calibrator needs to be

monitored, the measurement output can be repeated by giving command c<cr>

at Ref1 and Ref2:

>FCRH <cr>

RH : 12.00 Ref1 ? c <cr>

RH : 11.70 Ref1 ? c <cr>

RH : 11.50 Ref1 ? 11.3 <cr>

Press any key when ready ...

RH : 76.00 Ref2 ? 75.5 <cr>

CT Temperature calibration of the humidity sensor head

Disconnect the security lock jumper!

CT <cr>

With this command the humidity sensor head can be calibrated against an

accurate reference, such as a Pt 100 simulator. A two-point calibration is per-

formed as follows:

>CT <cr>

T : 0.80 Ref1 ? 0.0 <cr>

Press any key when ready ...

T : 56.20 Ref2 ? 55.0 <cr>

In one-point offset correction, the Ref2 prompt is acknowledged with <cr>:

>CT <cr>

T : 0.80 Ref1 ? 0.0 <cr>

Press any key when ready ...

T : 75.50 Ref2 ? <cr>

If the stabilization of the sensor to the temperature of the calibrator or the ref-

erence needs to be monitored, the measurement output can be repeated by giv-

ing command c<cr> at Ref1 and Ref2:

>CT <cr>

T : 0.80 Ref1 ? c <cr>

T : 0.40 Ref1 ? 0.00 <cr>

Press any key when ready ...

T : 56.20 Ref2 ? 55.0 <cr>

1 2 ... 71 72 73 74 75 76 77 78 79 80 81 ... 129 130

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Vaisala HMP243 Guide de l'utilisateur Page 76