Multimeter with non-contact temperature measurement
AssigneeExtech Instruments Corporation
InventorGerald W. Blakeley, III
Life of this patent
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Abstract
A multimeter with non-contact temperature measurement capability. The multimeter is contained in a housing, and has outputs relating to measured electrical parameters. There is also an output display contained in the housing, for displaying results to a user. A non-contact optically-based temperature sensing device is coupled to the housing, and has an output related to sensed temperature. Circuitry contained in the housing processes both the multimeter outputs and the temperature sensing device output, and transmits the processed output to the output display.
Claims18
A multimeter with non-contact temperature measurement capability, comprising:
- a multimeter contained in a housing and having outputs relating to measured electrical parameters;
- an output display contained in the housing, for displaying results to a user;
- a non-contact optically-based temperature sensing device comprising an infrared sensor built in to the housing, having an output related to sensed temperature of a surface, and without the capability of adjusting for emissivity of the surface being sensed, the temperature sensing device defining a sense axis that is adjustable relative to the housing, and further comprising a lens, proximate the infrared sensor and mounted in a mount that is coupled to and projects outwardly from the housing, for focusing entering radiation and protecting the infrared sensor, wherein the mount is movable by the user relative to the housing, to allow the user to aim the sense axis;
- and
- circuitry contained in the housing for processing both the multimeter outputs and the temperature sensing device output, in which the circuitry determines the sensed temperature based on the output of the temperature sensing device using a fixed emissivity value, the circuitry transmitting the processed output to the output display.
A digital multimeter with non-contact temperature measurement capability, comprising:
- a digital multimeter contained in a housing and having outputs relating to measured electrical parameters;
- a digital output display contained in the housing, for displaying results to a user;
- a non-contact infrared temperature sensing device contained within the housing, having an output related to sensed temperature of a surface, and without the capability of adjusting for emissivity of the surface being sensed, the temperature sensing device defining a sense axis that is adjustable relative to the housing and further comprising at least a lens that is mounted in a mount that projects outwardly from the housing, and is coupled to and movable by the user relative to the housing, to allow the user to aim the temperature sensing device sense axis;
- and
- circuitry contained in the housing for processing both the multimeter outputs and the temperature sensing device output, in which the circuitry determines the sensed temperature based on the output of the temperature sensing device using a fixed emissivity value, the circuitry transmitting the processed output to the output display.
Dependencies are inferred from the claim text.