Campbell-scientific CMP6-L, CMP11-L, and CMP21-L Pyranometers Manual de usuario descargar pdf (Pagina 21)

CMP6-L, CMP11-L, and CMP21-L Pyranometers

TABLE 7-2. CMP6 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 (–)

Clear Shield

7.2.3 CMP21 Wiring

A CMP21 purchased from Campbell Scientific has different

wiring than a CMP21 purchased directly from Kipp & Zonen.

NOTE

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 (AG or

) to keep

the signal in common mode range. Connections to Campbell Scientific

dataloggers for a single-ended measurement are given in TABLE 7-4.

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

Clear Shield

* Jumper to AG or

with user-supplied wire.

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 41 42

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Campbell-scientific CMP6-L, CMP11-L, and CMP21-L Pyranometers Manual de usuario Pagina 21

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