Three methods of hydraulic universal testing machine to ensure the accuracy of the cable

Wires and cables are special materials in life, whenHydraulic universal testing machineWhen the sensor is far from the instrument, you should pay attention to the resistance of the wires that cannot be ignored. If you must use extended cables, the following methods can be used to ensure measurement accuracy:

, when verifying the sensor of the universal testing machine, use a long cable used on site to make the verification consistent with the use conditions.

Second, use thick core wires to supply bridges to reduce the wire resistance and voltage drop.

Third, use the six-wire connection method, that is, two conductors are drawn out at each end of the supply bridge, one of which is used to pass the supply bridge current, and the other end is used to measure the actual supply bridge voltage or to sample the bridge voltage-regulating power supply.

at the same time,Universal testing machineThe long cable between the sensor and the measuring instrument will also change the resistance value as the temperature changes, which will also affect the measurement accuracy.