Campbell CVF4 Bedienerhandbuch Seite 21

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CMP6-L, CMP10-L, CMP11-L, and CMP21-L Pyranometers
14
TABLE 7-2. CMP6, CMP10 and CMP11 Single-Ended Connections to Campbell Scientific Dataloggers
Color
Description
CR9000(X), CR5000,
CR3000, CR1000,
CR800
CR510, CR500,
CR10(X)
21X, CR7, CR23X
White
Signal (+)
SE Analog
SE
Analog
SE Analog
Black
Signal (
)
AG
Clear
Shield
G
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 7-3able 7-3. A user-supplied jumper wire should be
connected between the low side of the differential input and ground (AG or
)
to keep the signal in common mode range. Connections to Campbell Scientific
dataloggers for a single-ended measurement are given in TABLE 7-4able 7-4.
TABLE 7-3. CMP21 Differential Connections to Campbell Scientific Dataloggers
Wire Color
Wire Label/
Description
CR9000(X),
CR5000, CR3000,
CR1000, CR800
CR510, CR500,
CR10(X)
21X, CR7, CR23X
White
Pyranometer Sig
DIFF Analog High
DIFF Analog High
DIFF Analog High
Blue
Pyranometer Ref
*DIFF Analog Low
*DIFF Analog Low
*DIFF Analog Low
Yellow
Thermistor Volt Excite
VX or EX
E
EX
Black
Thermistor Sig
Single
-
ended analog
Single
-
ended analog
Single
-
ended analog
Brown
Thermistor Ref
AG
Clear
Shield
G
* Jumper to AG or
with user-supplied wire.
Note
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