Campbell-scientific CURS100 100 Ohm Current Shunt Terminal Input Modul Manuale Utente Scaricare il pdf (Pagina 10)

CURS100 100 Ohm Current Shunt Terminal Input Module

Signal From Sensor

Sensor Cable Shield

Sensor Power

Jumper

FIGURE 3-1. CURS100 L terminal connected to a datalogger G

terminal using a jumper wire.

Normally the L terminal on the CURS100 should be connected

to a datalogger G terminal (power ground) with a jumper wire

(FIGURE 3-1). Connecting the L terminal to the adjacent

ground (

or G) terminal on the CURS100 can result in

unwanted return currents on the datalogger signal ground, which

could induce undesirable offset errors in low-level, single-ended

measurements. The G terminal on the CURS100 can be used to

connect cable shields to ground.

NOTE

4. Transducer Wiring

Current transducers differ mainly in how they are powered and in the relative

isolation of the current output. In this section, the transducers are grouped by

the total number of wires the transducer uses to obtain power and output the

current.

4.1 Two-Wire Transducers

In a two-wire transducer, the power supply is in series within the current loop.

The transducer regulates the amount of current that flows; the current drawn

from the battery is exactly the current used as a signal.

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Campbell-scientific CURS100 100 Ohm Current Shunt Terminal Input Modul Manuale Utente Pagina 10