Patent ID: 6064313
Filing Date: 2000-05-16
Classification: G01R

Abstract:
A tester for checking the impedance of electrical circuits by measuring the voltage drop resulting from a user-supplied load to the circuit, said tester comprising:a) connection means to said electrical circuit;b) sampling means for storing a sample of the electrical circuit voltage without the application of said user-supplied load, said sampling means operating continuously without the need for triggering by the user;c) comparison means for continuously comparing said sample with instantaneous changes in said electrical circuit voltage resulting from operation of said user-supplied load on said circuit;d) first indicator means for notifying said user when said comparison result indicates that said electrical circuit voltage is less than said sample by more than a set percentage;e) timer means activated under the same conditions as said first indicator means, said timer means becoming deactivated when said electrical circuit voltage rises to the point where said conditions are no longer met;f) second indicator means becoming activated when said timer has been continuously activated for a set minimum time;g) latching means for said second indicator, said latching means keeping said second indicator in the activated condition once it has been activated, said latch becoming unlatched when power is removed from said tester for a set period of time.