Campbell Scientific AM16/32A Multiplexer - Manual (Page 32)

AM16/32A Relay Analog Multiplexer
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0
"4 X 16" Mode
COM H (ODD)
COM L
COM H (EVEN)
COM L
ODD H
ODD L
EVEN H
EVEN L
SHIELD SENSOR SHIELDS COM
CR23X/
CR800/
CR850/
CR1000
21X/
CR7 CR10(X)
CR3000/
0 CR500
EX E E VX
H H H H
L L L L
AG
H H H H
L L L L
G
FIGURE 14. Fo
The CR5000 and CR3000 also have current excitation channels which
allow a resistance measurement. Because the excitation current is
known, it is not necessary to measure the voltage across a fixed
resistor to determine the current as in Figure 14. See Section 5.3 for
an example.
ur Wire Half Bridge Hook-up and Measurement
"4 X 16" Mode
COM H (ODD)
COM L
COM H (EVEN)
COM L
ODD H
ODD L
EVEN H
EVEN L
SHIELD SENSOR SHIELDS COM
/
0
CR23X/
CR800/
CR850/
CR1000
21X/
CR7 CR10(X)
CR3000/
CR5000
EX E E VX
AG
H H H H
L L L L
G
FIGURE 15. Full Bridge Measurement
6.4 Full Bridge Measurements
e
tation channel, a differential analog input channel, and
an analog ground. Up to sixteen full bridges may be multiplexed
through the AM16/32A.
Sensor to Multiplexer wiring – With panel switch set to “4x16” mode,
excitation, ground, and the two signal leads may be connected to on
input SET (Figure 15).
Multiplexer to Datalogger wiring - COM terminals are connected to a
datalogger exci
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