Chec; Dry On And Wet; Dry On - Vaisala PWD22/52 User Manual

USER'S GUIDE____________________________________________________________________
76 __________________________________________________________________ M210543EN-E
Or in the case of failure in the receiver (PWC22/52) one of the following:
ZERO SIGNAL: FAIL
ZERO SIGNAL: NOISE HIGH

CHEC

The CHEC command has no parameters and it is used in calibrating
visibility to display the one-minute average signal frequency in hertz
(Hz).
The displaying is terminated by pressing ESC. If you press any other key,
the displaying will only be paused. In the beginning, the four-location
buffer, which is used to calculate the average, is filled with the first
value.
When the calibrator is installed, the value displayed in the message
should be the same as printed on the calibrator glass plate.
Give the following command:
>CHEC
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
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.
®
Rain Sensor measurement.
®
signal normalization calculation. When giving