Table 18 Hardware Error Texts; Table 19 Warnings - Vaisala PWD22 User Manual

Chapter 5__________________________________________________________________ Operation
VAISALA ________________________________________________________________________ 83
The length of the message may vary depending on the options
configured in PWD22 and whether there are warning messages. An
asterisk (*) before a value indicates an exceeded limit.
If the Background Luminance Sensor PWL111 is not installed, line
BL680 is edited out. If the optional hood heaters are not installed, the
line HOOD HEATERS OFF is edited out. For details on values of this
message, see Appendix A, Values for Internal Monitoring, on page
111.
If warnings or errors are detected, one or many of the following texts
will appear at the end of the message.
See Table 18 and Table 19 below.
Table 18 Hardware Error Texts
Error Text Description
Backscatter High Receiver or transmitter contamination signal has
increased more than the ALARM limit given in the
configuration allows.
Transmitter Error LEDI signal is more than 7 V or less than -8 V.
±12 V Power Error Receiver/transmitter power is less than 10 V or more
than 14 V.
Offset Error Offset frequency is <80 or over 170 (PWC22
hardware).
Signal Error Signal frequency + offset frequency = 0, Signal
frequency - offset frequency < -1
Receiver Error Too low signal in receiver backscatter measurement.
Data RAM Error Error in RAM read/write check.
EEPROM Error EEPROM checksum error.
TS Sensor Error Measurement is out of limits.
DRD Error RAINCAP
Luminance Sensor PWL111 signal is out of limits.
Error
Table 19 Warnings
Warning Description
Backscatter Receiver or transmitter contamination signal has
Increased increased above the WARNING limit selected in the
configuration.
Transmitter Intensity LEDI signal less than -6 V.
Low
Receiver Saturated AMBL signal is less than -9 V.
Offset Drifted Offset Drifted
Visibility Not Visibility calibration coefficient has not been changed
Calibrated from the default value (see section CAL below).
®
signal is close to zero.