Vaisala PWD22 - Appendix B; Pwc22;52 Connectors and Jumper Settings

Appendix A __________________________________________________ Internal Monitoring Values
VAISALA ______________________________________________________________________ 107
Status Message
Typical
Min. / Max.
Fault
Description
Action
TS
Temperature
sensor.
Ambient
temperature
-40 °C...
+50 °C
-75°C / +98°C
'TS SENSOR
ERROR'
(Measurement
value under
-75°C)
Sensor or cable
short-circuits.
Check the
temperature
sensor cable
on control
unit.
Resistance of
Pt-100 should
be
80Ω...130Ω.
'TS SENSOR
ERROR'
(Measurement
value over
+98°C)
Sensor
disconnected or
bad connection.
Check X4
connection on
control unit.
Resistance of
Pt-100 should
be
80Ω...130Ω.
TB
Temperature of
the CPU board
Some
degrees
higher
than
ambient
temp.
-
-
-
SIGNAL
Frequency of the
transmission
signal between
transducer and
CPU (Hz),
inversely
proportional to
visibility
0.00
Hz....
10000.00
Hz
'SIGNAL
ERROR'
Signal frequency
plus offset
frequency = 0
or
Signal frequency
minus offset
frequency < -1
Interference with
other sensor of
the same kind.
Suddenly
increased noise
level.
Failure in
receiver circuitry.
Make sure
that the
device does
not receive
reflections or
scattering
from other
sensors. Aim
the receiver
away from
high intensity
light sources.
Change
PWC22/52.
VBB
Raw, unregulated
voltage in the
internal
transformer
output
12V...
13V
12 V / 15 V
<12 V
>15 V
Switched-mode
power supply is
overloaded or
working wrong.
VBB
measurement
may also fail due
to heavy
electrostatic
discharge to
RAINCAP
®
plate.
1) Reset.
2) Check
connectors
and cable.
3) Change the
control unit
PWC22/52.