Vaisala FS11P - Cal; Table 17 Hardware Error Texts; Table 18 Warnings

Chapter 4 _________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 121
If warnings or errors are detected, one or many of the following texts will
appear at the end of the message.
See Table 17 below and Table 18 below.
Table 17 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 below 80 or above 170 (PWC12
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
®
signal is close to zero.
Table 18 Warnings
Warning
Description
Backscatter
Increased
Receiver or transmitter contamination signal has
increased above the WARNING limit selected in the
configuration.
Transmitter Intensity
Low
LEDI signal less than -6 V.
Receiver Saturated
AMBL signal is less than -9 V.
Offset Drifted
Offset Drifted
Visibility Not
Calibrated
Optics calibration coefficien has not been changed
from the default value, see secion CAL below.
NO VISIBILITY
DATA
PWD32 has not received visibility data from FS11.
Note that the alarm is on after start until both 1
minute and 10 minute average information is
availabe from FS11.
CAL
The CAL command is used to calibrate the optical (forward scatter)
measurement. The calibration is done by using opaque glass plates with
known scatter properties. The plates belong to the PWA11 calibrator kit.