Digital multi-meter
First Claim
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.
1 Assignment
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Accused Products
Abstract
A multi-meter including a current input, a common input, a display, a first current measurement circuit, a second current measurement circuit, and a controller. The controller includes a first input and a second input. The controller operable to receive a first voltage from the first current measurement circuit at the first input, receive a second voltage from the second current measurement circuit at the second input, determine a value for a current being measured based on the first voltage if the first voltage is below a predetermined threshold, determine a value for a current being measured based on the second voltage if the first voltage is above the predetermined threshold, generate an output signal related to the determined value for the current, and provide the output signal to the display.
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Citations
14 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of measuring a current in a first current range or a second current range using a multi-meter, the method comprising:
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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; 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. - View Dependent Claims (9, 10, 11)
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12. A method of measuring a current in a first current range or a second current range using a multi-meter, the method comprising:
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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 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. - View Dependent Claims (13, 14)
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Specification