The CFW force washers are significantly flatter in design and are not pre-stressed. Pre-stressing is required when mounting.
These transducers must be calibrated when in a mounting condition.
The pre-stressing of the force washer is necessary to ensure the linearity and structural durability of the transducer.
This pre-stressing means that another mechanical element is mounted parallel to the force transducer.
We recommend that the force washer is pre-stressed to at least 10% of its nominal (rated) force. The force washer itself can be used to determine the initial stress.
A part of the measuring force is now shunted through the pre-stressing element. Pre-stress and force shunt are determined by the installation situation. It is therefore necessary to calibrate the force washers after mounting is complete, i.e. to compare the output signal of the transducer with a known force. The accuracy of the measurement results depends here mainly on the accuracy of the calibration.