Force measuring device with zero adjustment

Details Force measuring device with zero adjustment Force measuring device with zero adjustment

1989-10-10

1990-09-25

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to force

7386263, 73766, 73 1B, G01L 122, G01L 2500

Patent

active

049585266

ABSTRACT:
A strain gage load cell is adjusted to zero output signal at no load or a fixed tare load on the load cell independent of the load cell temperature by shunting a pair of opposing arms of the strain gage bridge by equal resistors, and connecting a pair of equal resistors between opposite terminals of the power supply for the strain gage bridge and opposite corners of the output terminals of the strain gage bridge. The zero adjustment according to the invention is especially useful with load cell arrangements where individual strain gage elements must have equalized sensitivities.

REFERENCES:
patent: 3576128 (1971-04-01), Lockery
patent: 3968676 (1976-07-01), Ormond
patent: 4380175 (1983-04-01), Griffen
patent: 4556115 (1985-12-01), Lockery et al.

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