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Digital multi-meter

  • US 10,126,331 B2
  • Filed: 12/29/2016
  • Issued: 11/13/2018
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
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1. A method of measuring a current in a first current range and a second current range using a multi-meter, the method comprising:

  • receiving, at a first current input of a controller, a first signal from a first electrical current measuring circuit located between a first input terminal of the multi-meter and a second input terminal of the multi-meter, the first electrical current measuring circuit measuring electrical current in the first current range;

    receiving, at a second current input of the controller, a second signal from a second electrical current measuring circuit located between the first input terminal of the multi-meter and the second input terminal of the multi-meter, the second electrical current measuring circuit measuring electrical current in the second current range;

    comparing, using the controller, the first signal to a predetermined threshold value;

    determining, using the controller, a value for the current being measured based on the first signal when the first signal is below the predetermined threshold value;

    determining, using the controller, a value for the current being measured based on the second signal when the first signal is greater than or approximately equal to the predetermined threshold value;

    generating, using the controller, an output signal related to the determined value for the current; and

    providing the output signal to a display of the multi-meter to display the determined value for the current on the display.

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