Vaisala HMP228 Manuel d'utilisateur télécharger pdf (Page 56)

HMP228 Transmitters

Appendix 1: Serial commands M210282en-A

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

Disconnect the security lock jumper!

CT <cr>

Using this command the transmitters can be calibrated against an accurate ref-

erence, such as a Pt 100 simulator. A two-point calibration is performed 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 ... 51 52 53 54 55 56 57 58 59 60 61 ... 114 115

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Vaisala HMP228 Manuel d'utilisateur Page 56