Connection Using The Four-Wire Circuit; Cable Extension - HBM C2 Series Mounting Instructions

C2A/..., C2A/.../Exd
5.4 Connection using the four‐wire circuit
Upon connection to amplifiers using the four‐wire circuit,
the cores bl (blue) and gn (green) should be connected,
as should bk (black) and gr (gray). Please take in
account that this causes deviations to the sensitivity and
the temperature coefficient of sensitivity that this causes.
5.5

Cable extension

Extension cables must be shielded and of low capaci­
tance. We recommend the use of HBM cables, which
satisfy these requirements.
HBM extension cables, 6 wires:
S KAB8/00‐2/2/2, sold by the meter, order‐no.
4‐3301.0071 = grey or 4‐3301.0082 = blue (only at
intrinsic safe applications)
S CABA1 (cable roll, order‐no. CABA1/20 = 20 m or
CABA1/100 = 100 m in length)
With cable extensions it is important to ensure a good
connection with minimum contact resistance and good
insulation.
When using the six‐wire circuit, the effects of resistance
changes in the extension cable are compensated. If you
extend the cable using the four‐wire circuit, the sensitivity
deviation can be eliminated by adjusting the amplifier.
However, temperature effects can only be compensated
when operating with the six‐wire circuit.
A1572-3.0 HBM: public
Connection
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