Measure the input resistance and compare the measured value with the value in data sheet; Measure the resistance between +Excitation and -Excitation; typical values of sensors with Straingages are 350Ohm, 1000Ohm, 370Ohm, 390Ohm, 700Ohm
Measure the output resistance and compare it with the value in the data sheet; Measure the resistance between +bridge output and - bridge output; typical values of sensors with straingages are 350Ohm, 1000Ohm, 700Ohm;
Measure the insulation resistance. Measure the resistance between bridge output and sensor housing. The resistance should be greater than 200 MOhm.
Connect sensor to amplifier and switch on
Supply voltage measured between +Excitation and -Excitation. Typical values are 2.5V or 5V or 10V or 8.75V
Measire the differential voltage at the bridge output (select multimeters range "mV"). Typical values are -1mV to + 1mV. If a value of the order of 10mV is measured, then the sensor is probably overloaded. If a value of half the supply voltage is measured, then within the sensor is a cable break.