Campbell CMP3, Product Manual, Page: 20 / 30

CMP3 Pyranometer
10
Red
Blue
Black
FIGURE 7-2. CMP3 Schematic
A CMP3 purchased from Campbell Scientific has different wiring
than a CMP3 purchased directly from Kipp & Zonen.
TABLE 7-1 shows connections to Campbell Scientific data loggers. Use either
differential or single-ended analog ue terminals to measure solar radiation. The
differential measurement has better noise rejection and is therefore
recommended. For differential measurements, a user-supplied jumper wire
needs to be connected between the low side of the differential input and ground
to keep the signal in common mode range.
TABLE 7-1. Wire Colo u r, Function, and Data Logger Connection
Wire
Colo u r
Wire
Function
Differential Data
Logger Connection
Terminal
Single-Ended Data
Logger Connection
Terminal
White
Signal
High
U
configured for
differential input 1 , DIFF
H (differential high,
analog ue -voltage input)
U
configured for single-
ended analog ue input 1 ,
SE (single-ended,
analog ue -voltage input)
Black
Signal
Reference
U configured for
differential input
1, 2
,
DIFF L (differential
low, analog ue -
voltage input)
2
AG
or
⏚
(analog ue
ground)
Clear Shield
AG or ⏚ (analog ue
ground)
AG or ⏚ (analog ue
ground)
1 U channels are automatically configured by the measurement instruction.
2 Jumper to
⏚
with a user-supplied wire.
7.4 Programming
Short Cut is the best source for up-to-date data logger programming code.
If your data acquisition requirements are simple, you can probably create and
maintain a data logger program exclusively with
Short Cut
. If your data
acquisition needs are more complex, the files that Short Cut creates are a great
NOTE
White
Black
Shield