Method for automatically changing current ranges

Details Method for automatically changing current ranges Method for automatically changing current ranges

2005-06-28

2005-06-28

Deb, Anjan (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S110000, C324S765010

Reexamination Certificate

active

06911831

ABSTRACT:
In a method for fast, high-accuracy autoranging measurement, a current detection resistance is shared by a current measurement apparatus and a voltage source with current limiting function, a value of current output from the voltage source via the resistance being measured by the current measurement apparatus, and the current range of the current measurement apparatus and the compliance being automatically changed in accordance with the measured current value. The method includes a step of setting the compliance corresponding to the current output from the voltage source to a prescribed value (104), a step of measuring the value of the current output from the voltage source using the current measurement apparatus (106), a step of comparing the current measured by the trial measurement with the current range and judging whether or not the current range is optimum (108), and a step, in the case of a judgment that the current range is optimum, of outputting from the current measurement apparatus the value of current that was measured, and then increasing the current range and changing the compliance (112).

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