Campbell-scientific 4WPB100, 4WPB1K PRT Terminal Input Modules Manual do Utilizador descarregar pdf (Página 6)

4WPB100, 4WPB1K PRT Bridge Terminal Input Modules

GND

Rf = 100 , 1k

10k

0.01%

FIGURE 2-1. Circuit Schematic

3. Wiring

The Terminal input module is connected to the appropriate channel. The

dashed lines in Figure 2-1 indicate the sensor wiring. When making 4 wire

half bridge measurements, the 4WPB is connected to a differential channel and

the sense leads from the PRT to the next differential channel. The black

excitation wire is connected to the excitation channel. In the following

examples the 4WPB is connected to differential channel 1 and the PRT to

differential channel 2; the excitation wire is connected to excitation channel 1

(Figure 3-1).

Ex1

AG or

PRT

4WPB100

Datalogger

FIGURE 3-1. Wiring for Example Programs

1 2 3 4 5 6 7 8 9 10 11 ... 15 16

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Campbell-scientific 4WPB100, 4WPB1K PRT Terminal Input Modules Manual do Utilizador Página 6