Multimeter having a measurement range switch

Details Multimeter having a measurement range switch Multimeter having a measurement range switch

1991-09-03

1994-01-11

Nguyen, Vinh

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural ranges, scales or registration rates

324110, G01R 1508

Patent

active

052784932

ABSTRACT:
In multimeters for the selective measurement of different measurable variables having test signals that are detected by the multimeter through the use of various input circuits assigned to respective measurable variables, an input circuit can be connected which is not suitable for an input variable set at a measurement range switch. In order to draw the attention of the operator at least to an error that the operator is responsible for, at least one auxiliary circuit is provided and fed through the measurement range switch in such a manner that a fixed assignment to a particular input circuit and consequently to a particular measurable variable results. The assignment is dependent on a switch position. Inserted in the auxiliary circuit is at least one function generator which triggers a function or a combination of a plurality of functions upon actuation, which is preferably achieved by closing the auxiliary circuit. This counteracts the operating error in switching the measurable variable.

REFERENCES:
patent: 4604569 (1986-08-01), Tedd et al.
patent: 5027057 (1991-06-01), Mageland et al.
patent: 5063344 (1991-11-01), Linke

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