Vaisala HMP230 User Manual download pdf (Page 91)

HMP230 SERIES

M210225en-B Appendix 1: Serial commands

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>

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Vaisala HMP230 User Manual Page 91