Vaisala FS11P - Alarm Messages; Table 27 Error Messages; Table 28 Alarm Messages

Chapter 5 _________________________________________________________ Theory of Operation
VAISALA _______________________________________________________________________ 161
V5iso
=
Isolated +5VDC operating voltage for RS-485
(on/off)
PWD STATUS
FS TS tells the temperature information sent
from FS11 to the PWD32.
Refer to PWD22 User's Guide for detailed information on other values
in PWD32 Status Message
#
=
End of the text
NOTE
T
he FS11P unit shows an alarm about 10 minutes after booting. This is
because until both 1 minute visibility and 10 minute visibility values are
calculated, the unit gives an warning to indicate that no all visibility
values are ready.
The heater status indicates whether the automatic heater control circuitry
has been turned on. When the automatic heater control circuitry is on, it
will automatically switch the heater on and off trying to keep the
temperature within the acceptable range.
An asterisk (*) in front of the heater status (ON/OFF) indicates that the
heater is currently heating.
Alarm Messages
This section describes the different alarm message types of the FS11P
sensor.
Table 27 Error Messages
ERRORS
Reasons
SENSOR NOT RESPONDING
Measurement unit FSM102, PWD32 or
LM21 not responding
MEMORY ERROR
FLASH memory checksum error,
configuration not valid
Table 28 Alarm Messages
ALARMS
Reasons
TRANSMITTER FAILURE
Transmitter not responding
LED FAILURE
Transmitter LED intensity too low
RECEIVER FAILURE
Receiver data invalid or receiver not
responding
POWER SUPPLY
One of the power supply voltages out of
the valid range
BACKSCATTER HIGH
Backscatter signal level increased, some
disturbance in the light path
RECEIVER SATURATED
Ambient light level too high on the receiver,
caused by, for example, sunbeams
reflecting from a reflecting surface