Weighing apparatus including load cells with intrinsic safety ba

Details Weighing apparatus including load cells with intrinsic safety ba Weighing apparatus including load cells with intrinsic safety ba

1983-02-28

1985-01-08

Miller, Jr., George H.

Weighing scales

Self-positioning

Electrical current generating or modifying

7386267, G01G 314, G01L 122

Patent

active

044922809

ABSTRACT:
Weighing apparatus including plural load cells. The load cells have parallel-connected inputs and outputs. The paralleled load cells are connected to a voltage measuring instrument through intrinsic safety barriers. The internal resistances of the load cell are selected such that excitation current limitations imposed by the intrinsic safety barriers are not exceeded and that the load cell output voltage variation accompanying a one grad change in the weight applied to the apparatus is great enough to be measurable by the instrument.

REFERENCES:
patent: 3917979 (1975-11-01), Volk, Jr.
patent: 4019519 (1977-04-01), Geerling
patent: 4320809 (1982-03-01), Knothe et al.
patent: 4416343 (1983-11-01), Knothe et al.
Intrinspak, Stahl, Safety Barriers for Intrinsically-Safe Wiring into Hazardous Locations, Excerpt of Manual 89-016-03-310.

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