S/G Transducers; S/G Full Bridge - HBM Spider8 Operating Manual

Connecting Ý Connecting transducers

3.1 S/G transducers

8
9
15
15-pin socket
Connection to carrier-frequency module SR55, SR30
3.1.1
S/G transducers - whether half bridge, full bridge or single S/G - are
passive transducers with the following features:
1
•
They must be supplied with an excitation voltage
•
They are S/G full bridges
•
A transducer is characterised by the following data
- Nominal load (e.g. 20kg)
- Nominal sensitivity (for S/G transducers e.g. 2mV/V)
- Resistance: maximum 1kΩ, minimum 120Ω
Typical S/G transducers are load cells and force transducers.

S/G full bridge

wh
rd
bk
bu
gn
gy
15-pin socket
8
1
Measurement signal
15
Measurement signal
4
Bridge excitation
5
2
voltage
Bridge excitation
6
3
voltage
13
3'
Sensor circuit
12
2' Sensor circuit
D-11
Spider8