Campbell CURS100 Manuel d'utilisateur télécharger pdf (Page 12)

CURS100 100 Ohm Current Shunt Terminal Input Module

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.

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.

Figure 4-1. 2-wire with datalogger power

NOTE

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Campbell CURS100 Manuel d'utilisateur Page 12