User`s guide

User’s Guide ______________________________________________________________________
194 __________________________________________________________________M210662EN-A
Wind Vanes
Table 36 on page 194 lists some common problems of Anemometers
and their remedies.
Table 36 Troubleshooting Wind Vanes
Problem Probable Cause Remedy
The data is not received
from the sensor.
The sensor is mechanically
damaged.
Check the cables and connectors.
After removing the connector's
hexagon nut, the connector is bent,
which breaks the connection wires.
Check the connector.
The sensor is not powered properly. Check that the supply voltage is from
9.5 to 15.5 VDC
Some Vaisala products, for example,
WAT12, switch power on to the
sensor only for a very short period
(200 s to 500 s).
Check that the sensor output rises
above (U
in
- 1.5 V) at the end of the
power pulse.
The sensor shaft is
covered with ice and
snow.
The heating element does not
function.
Send the sensor to Vaisala for repair.
The heating element is not properly
connected.
Open the sensor and check that the
heating element outlet is connected
to the connector on the printed circuit
board.
The output from the
connector pins C to H
do not have the right
code or are not at the
proper level.
The printed circuit board is damaged. Replace the printed circuit board or
send the sensor to Vaisala for repair.
Current consumption is
either less than 17 mA
or more than 25 mA
when the shaft is rotated
mechanically.