xLadder user manual-V2.0.0.6

The above figure shows how to make a four-wire current measurement.

PR-E-PT100

It can be connected with one two-wire or three-wire resistance-type the

rmocouple.

When two-wire technology applied, the terminals “ M1+ and IC1 ” (this rule

also shall be applied to ” M2+ and IC2 ” , “ M3+ and IC3 ” ) would be short

connected. Such connection can not compensate error/tolerance caused by

the resistance in measurement loop. The measurement error of 1 Ω

impedance of power cord is proportional to +2.5 ° C

The three-wire technology can inhibit the influence of measurement

results caused by cable length (ohmic resistance).

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