Vaisala HMP243 Guia do Utilizador descarregar pdf (Página 77)

HMP240

M210300en Appendix 1: Serial commands

CTA Temperature calibration of the optional T sensor head

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CTA <cr>

With this command the optional temperature sensor head can be calibrated

against an accurate reference, such as a Pt 100 simulator. A two-point

calibration is performed as follows:

>CTA <cr>

Ta : 0.80 Ref1 ? 0.0 <cr>

Press any key when ready ...

Ta : 56.20 Ref2 ? 55.0 <cr>

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

>CTA <cr>

Ta : 0.80 Ref1 ? 0.0 <cr>

Press any key when ready ...

Ta : 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:

>CTA <cr>

Ta : 0.80 Ref1 ? c <cr>

Ta : 0.40 Ref1 ? 0.00 <cr>

Press any key when ready ...

Ta : 56.20 Ref2 ? 55.0 <cr>

ACAL Calibrating the analogue outputs

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ACAL <cr>

Calibrates the outputs selected on channels 1 and 2. The output is measured

and the measured values (mA or V) entered as calibration coefficients.

For example, calibrating the outputs when 0...10 V signal has been selected on

both channels (set with AMODE command)

>ACAL <cr>

Ch1 U1 (V ) ? 0.123 <cr>

Ch1 U2 (V ) ? 9.98 <cr>

Ch2 U1 (V ) ? 0.120 <cr>

Ch2 U2 (V ) ? 9.98 <cr>

1 2 ... 72 73 74 75 76 77 78 79 80 81 82 ... 129 130

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Vaisala HMP243 Guia do Utilizador Página 77