© 2018 imc Test & Measurement GmbH
imc C-SERIES - Manual, Version 4 R 3 - 2018-10-19
101CS-5008-FD, CL-5016-FD
5.7.1.1 Full bridge
A full bridge has four resistors, which can be four
correspondingly configured strain gauges or one
complete sensor which is a full sensor internally.
The full bridge has five terminals to connect. Two leads
+VB(C) and -VB(D) serve supply purposes, two other leads
+in (A) and -in(B) capture the differential voltage. The
fifth lead sense(F) is the Sense lead for the lower supply
terminal, which is used to determine the single-sided
voltage drop along the supply line.
Assuming that the other supply cable +VB(C) has the
same impedance and thus produces the same voltage
drop, no 6th lead is needed. The Sense lead makes it
possible to infer the measurement bridge's true supply
voltage, in order to obtain a very exact measurement
value in mV/V.
Please note that the maximum allowed voltage drop along a cable may not exceed approx. 0.5 V. This
determines the maximum possible cable length.
If the cable is so short and its cross section so large that the voltage drop along the supply lead is
negligible. In this case the bridge can be connected at four terminals by omitting the Sense line.
For the predecessor model C-50xx pin sense(F) must never be unconnected!
In that case, sense(F) and -VB (D) must be jumpered.
5.7.1.2 Half bridge
A half bridge may consist of two strain gauges in a circuit
or a sensor internally configured as a half bridge, or a
potentiometer sensor. The half bridge has 4 terminals to
connect. For information on the effect and use of the
Sense lead sense (F), see the description of the full bridge.
The amplifier internally completes the full bridge itself, so
that the differential amplifier is working with a genuine
full bridge .
It is important that the measurement signal of the half
bridge is connected to +IN (A). The IN (B) access leads to
implausible measured values and influences the
neighbor channels.
101
To Next Page
Loading...
Need help?
General
