Dry On And Wet; Dry On; Wet - Vaisala PWD22 User Manual

User's Guide _______________________________________________________________________
86____________________________________________________________________ M210543EN-B
The output is the following:
SCALED FREQUENCY AVE (1 MIN)
499.9938
499.9880
>

DRY ON and WET

The DRY ON and WET commands are used to check and adjust the
operation of the Vaisala RAINCAP

DRY ON

The DRY ON command is used to set the reference level of the dry
signal for the RAINCAP
giving the DRY ON command, the sensor surface must be dry and
also the weather conditions must be dry.
The output is the following:
DRD DRY OFFSET 715.6
The DRY OFFSET value must be between 700 and 900, when the
®
RAINCAP hardware operates normally. The DRY command without
a parameter just shows this parameter.

WET

The WET command without a parameter shows the scaling factor that
normalizes the RAINCAP
state to be 1.00. A typical value is close to 0.0015.
DRD WET SCALE 0.00169
The WET ON command is used to set the parameter. The
®
RAINCAP measuring surfaces must be coated with a wet cloth or
immersed in water for at least 30 seconds, when the WET ON
command is given. Make sure the wet cloth touches only the
®
RAINCAP sensor.
The wet scale normalizes the measured signal range (DRY - WET) to
1.00.
®
Rain Sensor measurement.
®
signal normalization calculation. When
®
signal change from the dry state to the wet