CS120A and CS125 Visibility and Present Weather Sensors
21
Figure 8-4. Configuration cable
Figure 8-5. USB configuration cable
9. HygroVUE 5, HygroVUE 10 or CS215 T/RH Sensor
(CS125 only)
The CS125 has a temperature sensor mounted in the crossarm that is used in
determining precipitation type.
A HygroVUE 5, HygroVUE 10 or CS215 temperature and RH sensor can be
connected to a CS125. This is recommended as it will improve the
performance of the CS125 in identifying precipitation and allows it to, for
example, distinguish between mist and haze. Precipitation identification at
temperatures close to freezing will be much improved by a CS215 and its use is
highly recommended in regions where temperatures close to 0°C are common
if information on precipitation type is important. It also allows RH information
to be included in data messages.
If a HygroVUE 5, HygroVUE 10 or CS215 is connected then the temperature
used for assessment of precipitation type and included in data messages will
come from the HygroVUE 5, HygroVUE 10 or CS215 instead of the
temperature sensor mounted in the cross arm.
The connections for the HygroVUE 5, HygroVUE 10 or CS215 are shown in
. The HygroVUE 5 can be mounted in the Rad 6, the HygroVUE 10
in the Rad 10E, or CS215 itself can be mounted in a Met20 screen on the same
mast as the CS125. The screen can be mounted on the top section of an OSM1
optical mast below a CS125.
