Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural ranges – scales or registration rates
Patent
1979-07-11
1982-03-23
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural ranges, scales or registration rates
324133, G01R 1508, G01R 1916
Patent
active
043215300
ABSTRACT:
A digital multimeter having a tone generating circuitry and operable in a tone mode of operation for providing an audible indication when a measured electrical characteristic has a predetermined relationship with a reference value. The audible indication may be provided when a voltage level exceeds a preselectable limit, such as 1 or 2 volts. Predetermined limits for resistance values may also be selected for actuation of the audible tone. The device may be utilized as a conventional multimeter when the tone mode is non-operative.
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Emile, Jr. Philip
Kelly Austin T.
Stolpen Alan H.
Gaudier Dale V.
Ishimaru Mikio
Kaliko Joseph J.
Karlsen Ernest F.
Sangamo Weston, Inc.
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