Users Manual

Operating Manual Smart Weather Sensor
12 G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany
4 Equipment Description
The WS family is a range of low cost smart combination of weather sensors for the
acquisition of a variety of measurement variables, as used for example for environmental
data logging in road traffic management systems. Depending on the model, each device has
a different combination of sensors for the various measurement variables.
WS100-UMB
WS200
-UMB
WS300
-UMB
WS301-UMB**
WS400
-UMB
WS401
-UMB
WS500
-UMB
WS501
-UMB***
WS600
-UMB
WS601
-UMB
WS700
-UMB
WS800
-UMB
Air temperature
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Humidity
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Air pressure
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Precipitation
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●*
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●*
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Wind direction
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Wind speed
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Compass
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Global Radiation
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Lightning Sensor
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Temperature (ext)
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Rain Gauge (ext)
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Power Save 2
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*) WS401-UMB and WS601-UMB use a rain gauge for precipitation measurement
**) is also valid for WS302-UMB, WS303-UMB, WS304-UMB, WS310-UMB
***) is also valid for WS502-UMB, WS503-UMB, WS504-UMB, WS510-UMB
Sensors marked (ext) in the table are additional accessories and not included with the
device. The table shows which external sensors can be connected to the different models.
Note: The external temperature sensor and the external rain gauge use the same input, so
only one of them can be connected simultaneously.
Attention: Please note that, due to the approval of the radar sensor used, there are different
country options on equipment which includes precipitation measurement by radar
technology.
The equipment is connected by way of an 8 pole screw connector and associated
connection cable (length 10m).
The measured values are requested over the RS485 interface in accordance with UMB
protocol.
During commissioning, configuration and measurement polling takes place using the UMB-
Config-Tool (Windows
®
PC software) or the ConfigTool.NET (for WS100-UMB)
4.1 Air Temperature and Humidity
Temperature is measured by way of a highly accurate NTC-resistor while humidity is
measured using a capacitive humidity sensor. In order to keep the effects of external
influences (e.g. solar radiation) as low as possible, these sensors are located in a ventilated
housing with radiation protection. In contrast to conventional non-ventilated sensors, this
allows significantly more accurate measurement during high radiation conditions.
WS100-UMB is not intended for air temperature measurement, so it is not equipped with a
radiation shield. Air temperature values with reduced accuracy are available as service
channels for additional information.
Additional variables such as dewpoint, absolute humidity and mixing ratio are calculated
from air temperature and relative humidity, taking account of air pressure.