Vaisala DMP248 Manuel de service télécharger pdf (Page 95)

APPENDIX 1 SERIAL COMMANDS__________________________________________________________

VAISALA _________________________________________________________________________ 89

LI Entering linear correction coefficients

Disconnect the security lock jumper!

LI <cr>

The LI command is one way of calibrating the transmitters.

>LI <cr>

RH offset : 0.000 ? -.6 <cr>

RH gain : 1.000 ? <cr>

Ts offset : 0.000 ? <cr>

Ts gain : 1.000 ? .4 <cr>

The factory settings are offset 0 and gain 1.

NOTE

The temperature unit in offset correction is always degrees

Centigrade, even if the transmitter is using non-metric units

(Fahrenheit) in its measurement output.

Output via the serial bus

R Starting the measurement output

R <cr>

Starts output of measurements to the peripheral devices (PC display or printer);

output interval is set with command INTV.

Factory setting of the output format:

Td= -9.3 ’C PPM= 2733 T= 22.1 ’C RH= 10.4 %RH

Td= -9.3 ’C PPM= 2730 T= 22.1 ’C RH= 10.4 %RH

...

When the transmitter sends out the readings, the serial interface does not echo

any commands; the only command that can be used is S (stop).

The output format can be changed with command FORM.

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Vaisala DMP248 Manuel de service Page 95