Back to results
US 12,716,923 B2Granted
Multi-channel handheld digital multimeter having separate common terminals
AssigneeFluke Corporation
InventorsJeffrey Elrod, Michael Perry, Joseph Ferrante, George Allen, Jeffrey C. Hudson, John Gilbert
Life of this patent
Estimating the term…
Abstract
A single handheld multimeter device includes two or more independent measurement channels that are completely electrically separated and independent from one another. Each measurement channel has its point of reference, typically configured to be coupled to the ground. Measurements by the two or more independent measurement channels can be conducted concurrently, and the measurement results of the two channels can be processed and displayed together.
Claims24
A handheld measurement device, comprising:
- a first measurement channel configured to measure an electrical parameter of an object and determine a first measurement value, the first measurement channel including a first common terminal and a first ASIC circuit and a first A/D converter coupled to the first common terminal;
- a second measurement channel configured to measure an electrical parameter of an object and determine a second measurement value, the second measurement channel including a second common terminal that is separate from the first common terminal, the second measurement channel including a second ASIC circuit and a second A/D converter coupled to the second common terminal, and the second measurement channel including the second ASIC circuit and the second A/D converter being electrically isolated from the first measurement channel including the first ASIC circuit and the first A/D converter by one or more isolation shells each having an electrical insulation material;
- a processing unit electrically coupled to both the first measurement channel and the second measurement channel and configured to receive the first measurement value and the second measurement value;
- and
- a display electrically coupled to the processing unit and configured to present one or more of the first measurement value or the second measurement value, or a combination thereof.
2 more elements
A handheld measurement system, comprising:
- a body, the body including:
- a first measurement channel configured to measure an electrical parameter of an object and determine a first measurement value, the first measurement channel including a first common terminal, the first measurement channel including a first ASIC circuit and a first A/D converter enclosed within a first isolation shell having an electrical insulation material;
- a second measurement channel configured to measure an electrical parameter of an object and determine a second measurement value, the second measurement channel including a second common terminal that is separate from the first common terminal, the second measurement channel including a second ASIC circuit and a second A/D converter enclosed within a second isolation shell having an electrical insulation material, and the second measurement channel being electrically isolated from the first measurement channel by one or more of the first isolation shell or the second isolation shell;
- and
- a user interface, the user interface including:
- a display configured to present one or more of the first measurement value and the second measurement value, or a combination thereof;
- a first set of measurement terminals coupled to the first measurement channel;
- a second set of measurement terminals coupled to the second measurement channel, the second set of measurement terminals each separate from the first set of measurement terminals;
- a first control unit coupled to the first measurement channel;
- and
- a second control unit coupled to the second measurement channel.
8 more elements
A method, comprising:
- measuring a first electrical parameter using a first test lead coupled to a first measurement terminal and a first common terminal of a first measurement channel of a handheld measurement device, the first measurement channel including a first ASIC circuit and a first A/D converter;
- measuring a second electrical parameter using a second test lead coupled to a second measurement terminal and a second common terminal of a second measurement channel of the handheld measurement device, the second measurement terminal and the second common terminal different from the first measurement terminal and the first common terminal, respectively, the second measurement channel including a second ASIC circuitry and a second A/D converter, the second measurement channel including the second ASIC circuitry and the second A/D converter being electrically isolated from the first measurement channel including the first ASIC circuitry and the first A/D converter by the one or more isolation shells, wherein a processing unit electrically coupled to both the first measurement channel and the second measurement channel receives a first measurement value of the first measurement channel and a second measurement value of the second measurement channel;
- and
- causing a display electrically coupled to the processing unit to present one or more of the first measurement value, the second measurement value, or a combination thereof, on the display.
1 more element
Dependencies are inferred from the claim text.