Clamp meter for measuring consumption of current and power of electrical product

• US 7,750,621 B1
• Filed: 07/17/2009
• Issued: 07/06/2010
• Est. Priority Date: 07/17/2009
• Status: Active Grant

• Current Assignee: Chung Instrument Electronics Industrial Co., Ltd.
• Original Assignee: Chung Instrument Electronics Industrial Co., Ltd.
• Inventors: Liu, Shaw-Lin
• Primary Examiner(s): Nguyen; Ha Tran T
• Assistant Examiner(s): Chan; Emily Y
• Application Number:
  US12/504,688
• Time in Patent Office: 354 Days
• Field of Search: 324126-127, 324/142, 324/133, 324/156, 439/822, 439/858
• US Class Current: 324/126
• CPC Class Codes: G01R 1/06788 Hand-held or hand-manipulated probes, e.g. for oscilloscopes or for portable test instruments end pieces terminating in a probe H01R11/18
• CPC Class Codes: G01R 1/206 Switches for connection of measuring instruments or electric motors to measuring loads switches in general H01H
• CPC Class Codes: G01R 1/22 Tong testers acting as secondary windings of current transformers

Abstract

A clamp meter is provided for measuring consumption of current and power of an electrical appliance. The clamp meter includes a power inlet port and a power outlet port that are in controlled connection with each other. A current detection element is arranged between the power inlet port and the power outlet port. When the power inlet port is connected to a power source and the power outlet port is connected to an electrical appliance to be detected, with the electrical appliance turned on, the current detection element detects and converts the current flowing through the power outlet port into a digital signal, which is displayed on a display device mounted on the clamp meter, whereby, through the data and information displayed on the display device, a user may get aware of the power consumption of the electrical appliance and abnormality of power consumption thereof.

Claims

1. A clamp meter adapted for measuring consumption of current and power of an electrical appliance, the clamp meter comprising a power inlet port and a power outlet port and a current detection element arranged between the power inlet port and the power outlet port, a display device mounted on the clamp meter, the power inlet port being adapted to connected to a power source and the power outlet port being adapted to connect to the electrical appliance, whereby when the electrical appliance is turned on, the current detection element detects and converts current flowing through the power outlet port into a digital signal, which is displayed on the displayed device, wherein the clamp meter forms a slide groove outside the power inlet port to slidably receive a gate board, the gate board having edges forming at least one positioning projection, which selectively and sequentially engages a plurality of notches defined in side walls of the slide groove, so as to selectively position the gate board with respect to the slide groove.

2. The clamp meter according to claim 1, wherein the clamp meter forms a switch between the power inlet port and the power outlet port for selective connection/disconnection between the power inlet port and the power outlet port.