Connection In Four-Wire Configuration; Shortening The Cable - HBM Z6 Série Manuel D'emploi

Electrical connection
14
5.2

Connection in four-wire configuration

When transducers in a six-wire configuration are con­
nected to amplifiers in a four-wire configuration, the
sense leads of the transducer must be connected to the
corresponding excitation voltage leads: Marking (+) with
(+) and marking (-) with (-), see Fig. 5.1. This measure
also reduces the cable resistance of the excitation volt­
age leads. However, there will be a voltage loss on the
supply leads due to the cable resistance that is still
present and not compensated for by the six-wire configu­
ration. A large part of this loss can be eliminated by a
calibration, however, the temperature-dependent part
remains.
Important
The TC value given in the specifications for the trans­
s
ducer therefore does not apply for the cable and trans­
ducer combination when connection is in a four-wire con­
figuration, where the cable percentage must be added.
The following deviations occur in the case of an uncut
cable (3 m):
S Sensitivity approx. -0.2%
S TC
approx. -0.01% per 10 K.
S
5.3

Shortening the cable

If the transducer is connected to an amplifier in a six-wire
configuration, the transducer cable can be shortened as
required, without adversely affecting the measurement
accuracy.
A1027-4.1 HBM: public
Z6...