resistance of the tensile cord series circuit a change in the tension strain or a break in the tensile cord circuit will affect r 1 thereby changing a voltage v across the bridge the change would register on display 300 the magnitude of r 1 is first measured in the unstressed or unloaded condition r 4 is then adjusted to balance the bridge in the unstressed condition then as the belt is loaded the strain changes the resistivity of the tensile cords causing a voltage v to change the voltage change may include registration of strain up to and including total failure of one or all of the tensile cords one can appreciate that failure of a single tensile cord on the circuit will cause resistance r 1 to approach u221e u03c9 this will result in a marked change in voltage v across the bridge alerting a user who can then take the equipment out of service or make repairs in service belt 100 is clamped at each end by mounting bracket m 1 and m 2 each mounting bracket grips the belt body thereby affixing it to a cable drum or elevator car or other piece of equipment in the preferred embodiment the belt has discrete ends.