Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Reexamination Certificate
2007-05-08
2007-05-08
Hirshfeld, Andrew H. (Department: 2858)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
C324S715000
Reexamination Certificate
active
10619187
ABSTRACT:
An automated method is provided for testing an electrical circuit using a system tester. Load leads and sense leads of the tester are connectable to any two points of an electrical circuit, such as in a vehicle system, for displaying in real time the impedance between the tested circuit points. A controller is responsive to various sensed signals to calculate impedance, admittance or conductance, and related parameters, such as available cranking current, and provide results for read out or display. A load may be connected across the circuit points under test, the sensed signals derived from a current sense amplifier, a DC voltage amplifier, a ripple amplifier, and an AC amplifier.
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Brott Alejandro P.
Goetzelmann Alan D.
Jonker Gary
Thibedeau Dennis G.
Willems Paul A.
Dole Timothy J
Hirshfeld Andrew H.
McDermott Will & Emery LLP
Snap-On Incorporated
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