Campbell CMP11, Инструкция по эксплуатации

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CMP6, CMP11, and CMP21 Pyranometers
TABLE 7-2. CMP6 and CMP11 Single-Ended Connections to
Campbell Scientific Dataloggers
Color Description
CR9000(X), CR5000, CR3000,
CR1000, CR800, CR6
White Signal (+) SE Analog
Black Signal (–)
⏚
Clear Shield
⏚
7.2.3 CMP21 Wiring
A CMP21 purchased from Campbell Scientific has different
wiring than a CMP21 purchased directly from Kipp & Zonen.
The CMP21’s pyranometer can be measured using either differential analog
channels or single-ended analog channels. A differential voltage measurement
is recommended because it has better noise rejection than a single-ended
measurement. If a differential channel is not available, a single-ended
measurement can be used.
A single-ended channel and a voltage excitation channel are used to measure
the CMP21’s internal thermistor.
Connections to Campbell Scientific dataloggers for a differential measurement
are given in TABLE 7-3 . A user-supplied jumper wire should be connected
between the low side of the differential input and ground ( ⏚ ) to keep the signal
in common mode range. Connections to Campbell Scientific dataloggers for a
single-ended measurement are given in TABLE 7-4 .
TABLE 7-3. CMP21 Differential Connections to
Campbell Scientific Dataloggers
Wire
Color
Wire Label/
Description
CR9000(X), CR5000, CR3000,
CR1000, CR800, CR6
White Pyranometer Sig Differential Analog High
Blue Pyranometer Ref * Differential Analog Low
Yellow Thermistor Volt Excite Voltage excitation port
Black Thermistor Sig Single-ended analog
Brown Thermistor Ref
⏚
Clear Shield
⏚
* Jumper to ⏚ with user-supplied wire.
NOTE
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