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PDF TC041-L Data sheet ( Hoja de datos )

Número de pieza TC041-L
Descripción Precipitation Sensor
Fabricantes Campbell Scientific 
Logotipo Campbell Scientific Logotipo



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No Preview Available ! TC041-L Hoja de datos, Descripción, Manual

TC041-L Precipitation Sensor
(Precipitation Occurrence & Rainfall Intensity)
Sept 2008
Copyright © 2008
Campbell Scientific (Canada)Corp.

1 page




TC041-L pdf
The sensor signal output is an intensity dependent milliampere (mA) value
over the range of 4 to 20mA. The current output represents a rainfall
intensity range of 0 to 10 mm/min. The use of a current shunt is required
in order to interface the sensor with a Campbell Scientific datalogger (i.e.
CURS100).
Outputs are divided into four linear characteristic segments. Each
segment has a slope that is 10% of the magnitude of the next segment.
Figure 1 is a graphical representation of the four rainfall intensity output
segments.
Rainfall Intensity Outputs
10.00
9.00
8.00
7.00
6.00
5.00
4.00
3.00
2.00
1.00
0.00
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Sensor output (mA)
Figure 1 – Rainfall Intensity Outputs
Segments
3. Operation:
When the sensor is operational, light emitting diodes are used to create a
light band across the sensor opening. As precipitation falls through the
sensor opening a shadowing effect is seen in the light band, on the
receiving side. The extent of shading and the duration of shading are used
as factors to determine if a precipitation event is occurring, and are used to
calculate intensity.
The light sent from the emitting diodes is pulse modulated so that ambient
light cannot influence the measurement results.
3

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