Cal; Table 15 Hardware Error Texts; Table 16 Warnings - Vaisala PWD22/52 User Manual

USER'S GUIDE____________________________________________________________________
74 __________________________________________________________________ M210543EN-E
If warnings or errors are detected, one or several of the following texts
appear at the end of the message.
See Table 15 below and Table 16 below.
Table 15 Hardware Error Texts
Error Text
Backscatter High
Transmitter Error
±12 V Power Error
Offset Error
Signal Error
Receiver Error
Data RAM Error
EEPROM Error
TS Sensor Error
DRD Error
Luminance Sensor Error PWL111 signal is out of limits.
Table 16 Warnings
Warning
Backscatter Increased
Transmitter Intensity
Low
Receiver Saturated
Offset Drifted
Visibility Not Calibrated

CAL

The CAL command is used to calibrate the visibility measurement. The
calibration is done by using opaque glass plates with known scatter
properties. The plates belong to the PWA11 calibrator kit.
The command is the following:
CAL Calibrator_signal_value
For example:
>CAL 485
Description
Receiver or transmitter contamination signal has
increased more than the ALARM limit given in the
configuration allows.
LEDI signal is more than 7 V or less than -8 V.
Receiver/transmitter power is less than 10 V or
more than 14 V.
Offset frequency is <80 or over 170 (PWC22/52
hardware).
Signal frequency + offset frequency = 0, Signal
frequency - offset frequency < -1
Too low signal in receiver backscatter
measurement.
Error in RAM read/write check.
EEPROM checksum error.
Measurement is out of limits.
®
RAINCAP signal is close to zero.
Description
Receiver or transmitter contamination signal has
increased above the WARNING limit selected in the
configuration.
LEDI signal less than -6 V.
AMBL signal is less than -9 V.
Offset Drifted
Visibility calibration coefficient has not been
changed from the default value (see section CAL
below).