HBM TB1A, Инструкция по монтажу, Страница: 29 / 108

Electrical connection
TB1A
A0162-8.0 HBM: public
27
system in a Faraday cage. Any electromagnetic
interference active here does not affect the measurement
signal. Special electronic coding methods are used to
protect the transmission path from electromagnetic
interferences.
In the case of interferences due to potential differences
(compensating currents), operating‐voltage zero and
housing ground must be disconnected on the amplifier
and a potential equalization line between housing and
amplifier housing must be established (highly flexible
stranded wire, 10 mm
2
wire cross‐section).
6.2 Four‐wire technique
If the reference torque measuring‐disc has to be
operated with a measuring amplifier using the four‐wire
technique, then the
black wire is connected to the gray
wire and the green wire is connected to the blue wire.
The sensitivity of the transducer changes by approx.
0.022 %. The sensitivity temperature coefficient variation
(TK
C
) is negligible. Changes in cable lengths cause a
sensitivity variation. The influences of temperature on the
cable are not corrected. However, measurement
accuracy is adequate for many measurement
requirements, even in the case of the four‐wire
technique.