Structure And Function; Measuring Element; Measurement, Output Signal; Disturbance Variables - HBM KMR Mounting Instructions

KMR
3

Structure and function

3.1 Measuring element

The KMR have been designed as welded construction and are completely
made from corrosion-resistant, hardened steel. They can be mounted in any
position.
In the measuring element, strain gauges are connected to form a Wheatstone
bridge. The balancing elements are located in the cable end.
Therefore, do in no case shorten the cable.
The connection-cable sheathing is made from polyurethan (PUR).

3.2 Measurement, output signal

With axial forces, the measuring element is upset and the Wheatstone bridge
detuned. With a bridge excitation voltage fed, the circuit supplies an output si-
gnal that is proportional to the change in resistance and thus proportional to
the force applied.
Measurement signal conditioning requires an electronic system (e.g. an ampli-
fier) that is part of the complete measuring chain.

3.3 Disturbance variables

Torsion, bending and side forces are disturbances that may reduce accuracy
or even damage the KMR.
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HBM