Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural ranges – scales or registration rates
Patent
1995-05-24
1996-02-06
Nguyen, Vinh P.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural ranges, scales or registration rates
G01R 1508
Patent
active
054898412
ABSTRACT:
A method for measuring various measurable variables with a multimeter includes specifying one of a plurality of measurable variables to be determined through a position of a measurement range switch and/or through a selection between various input connections respectively assigned to the measurable variables. Input circuits are assigned to respective measurable variables. A preliminary test is performed for at least one of the measurable variables to check if an input circuit is suitable for picking up an applied test signal, before an actual main measurement is carried out. A given input circuit is enabled for picking up the test signal only if the preliminary test has shown that the test signal is suitable for the given input circuit. An error signal is issued if a test signal being unsuitable for the given input circuit ensues. A multimeter for measuring various measurable variables includes a measurement range switch and/or various input connections for specifying a measurable variable to be picked up. Input circuits are each associated with a respective one of the measurable variables. At least one input circuit switch in at least one of the input circuits is open in a position of repose and is switched on for measurement only if a test of the test signal has shown that one of the input circuits to be switched on is suitable for picking up a test signal from a test object.
REFERENCES:
patent: 4075559 (1978-02-01), Chaprnka et al.
patent: 4321530 (1982-03-01), Kelly et al.
patent: 4520310 (1985-05-01), Kelly et al.
patent: 4604569 (1986-08-01), Tedd et al.
patent: 4789824 (1988-12-01), Henkelmann
patent: 5166599 (1992-11-01), Hochreuther et al.
patent: 5278493 (1994-01-01), Henkelmann
ABB Patent GmbH
Greenberg Laurence A.
Lerner Herbert L.
Nguyen Vinh P.
LandOfFree
Multimeter for measuring various measurable variables does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multimeter for measuring various measurable variables, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multimeter for measuring various measurable variables will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2177112