Vaisala DMP248 Manuel de service télécharger pdf (Page 89)

APPENDIX 1 SERIAL COMMANDS__________________________________________________________

VAISALA _________________________________________________________________________ 83

Auto-calibration commands

DRYCAL Defining the frequency of auto-calibration cycles

DRYCAL<cr>

>drycal

DCAL ON

Interval min : 360 ?

Max dTdp: 2.00 ?

dTdp time s : 10

Max corr. : 0.040 ?

The interval parameter defines the frequency of auto-calibration

cycles. When the transmitter is turned on, the first auto-calibration

takes place after on hour unless the frequency has been set to less than

an hour. After the first auto-calibration, the set frequency is activated

and the auto-calibration takes place e.g. every six hours. If the setting

is changed, it becomes valid only after the next auto-calibration has

been completed. If you wish to activate it immediately, reset the

transmitter or turn it off.

The 0D[G7GS parameter defines the maximum allowed change of the

dewpoint value during the pre-defined G7GS time before auto-

calibration. If the change in dewpoint value exceeds the limit, the

calibration is not started. The auto-calibration is done only after

process is stabilized. The G7GS defines the time for 0D[ G7GS

measurement.

The Max corr. parameter defines the maximum correction (%RH) the

transmitter does during each auto-calibration cycle. The 6HWWO WLPH

defines the time the output values (measured before auto-calibration)

are frozen after the auto-calibration. The time is for sensor

temperature stabilization.

NOTE

Normally, the Max dTdp and the Max corr. parameters need not be

changed.

NOTE

Auto-calibration takes place only when the security lock jumper is

connected.

1 2 ... 84 85 86 87 88 89 90 91 92 93 94 ... 144 145

Pas de commentaire

Vaisala DMP248 Manuel de service Page 89