Electrical connection
PAD4002A
A4243-1.0
HBM: public
25
R
Cable
R
Cable
R
Sensor
U
Sensor
U
Amplifier
R
Sensor
R
Sensor
+ 2
@
R
Cable
U
Sensor
U
Amplifier
=
Fig. 6.3
Voltage ratios at the sensor based on cable
resistance
R
Cable
=
The resistance of a cable is calculated by
The variation of resistance with temperature is
with
a
20
= 4.3
∙
10
−
3
/
°
C (temperature coefficient at 20
°
C)
The specific resistance
ρ
of copper at 20
°
C is
ρ ∙ length
cross-section
ρ
20
= 0.0169
Ω
∙
mm
2
/ m
R
Temp
= R
20
∙
(1 +
a
∙
(t
−
20))
When using HBM load cells (6‐wire configuration), in the
connection variant with inter-connected wires (pins 7 and
3 / pins 6 and 5), sensitivity is affected as shown in the
table below .
