Invention Grant
- Patent Title: Voltage reference selector for use in conjunction with a multi-meter in taking electrical measurements from an electrical control panel
- Patent Title (中): 电压参考选择器，用于与电表控制面板进行电气测量的万用表结合使用
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Application No.: US12963873Application Date: 2010-12-09
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Publication No.: US08547084B2Publication Date: 2013-10-01
- Inventor: Eric A. Armstrong
- Applicant: Eric A. Armstrong
- Agent Bruce J. Bowman
- Main IPC: G01R5/14
- IPC: G01R5/14 ; G01R5/16 ; G01R13/00
Abstract:
A voltage reference selector, used in conjunction with a multi-meter, allows user selection of a reference voltage used by the multi-meter from three different reference voltages of an electrical control panel when taking electrical measurements from the electrical control panel via the multi-meter. A portable voltage reference selector is electrically connected to a multi-meter and temporarily electrically connected to voltage reference points of an electrical control panel for taking electrical measurements from the control panel with the multi-meter. In this form, a test lead from the multi-meter obtains electrical measurements from the control panel. A permanent voltage reference selector is permanently connected to voltage reference points of an electrical control panel and is electrically connectable to a multi-meter for taking electrical measurements from the control panel with the multi-meter. In this form, a test lead of the voltage reference selector obtains electrical measurements from the control panel.
Public/Granted literature
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