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Voltage measuring device

A technology of DC potentiometer and resistance, which is applied in the direction of AC/DC potential difference measuring devices, etc., which can solve problems such as out-of-tolerance measurement data, complicated switch and instrument structure, and increased instrument volume.

Inactive Publication Date: 2011-10-05
HANGZHOU TIANYE COMM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the second and third stepping discs have auxiliary discs, the number of layers of the second and third stepping disc switches is increased, thereby increasing the volume of the instrument and complicating the structure of the switch and the instrument. If the measurement data of the second and third stepping discs are found to be out of tolerance during the verification process, it is very troublesome to correct the inner layer resistance of the second and third stepping disc switches

Method used

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  • Voltage measuring device
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Embodiment Construction

[0010] exist figure 1 , when the three stepping disks and one double-sliding wire disk are all set to "0", the left resistance between the two brushes of the first stepping disk is equal to 2112Ω, and the resistance on the right is equal to 21120Ω, and the two brushes of the first stepping disk The total resistance between them is 1920Ω, so 10 / 11 of the total current between the two brushes of the first step plate flows on the left, and 1 / 11 flows on the right. When the three stepping discs and one double-sliding disc are set to other indication values, the increased resistance of the measuring disc is equal to the reduced resistance of the replacement disc, so no matter what indication value is set on the three stepping discs and one double-sliding disc, the circuit The total resistance remains unchanged.

[0011] In the ×10 range, the total resistance between the two brushes of the first step plate plus the 80Ω resistance R 4 , a total of 3000Ω, the resistance between the ...

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Abstract

The invention discloses a voltage measuring device used for measuring direct current voltage, which is provided with three stepping disks and a dual-sliding line disk; each disk forms a measuring disk and a replacing disk by resistors with the same resistance; the three measuring disks and sliding lines of one measuring disk are connected directly by conducting wires without switching by using a switch; and the voltage measuring device does not have variation and thermoelectric potential effects during measurement. The voltage measuring device has three ranges and the minimum resolution is 0.1 mu V.

Description

[0001] This case is a divisional application of an invention filed on August 28, 2008, the application number is 200810120442.4, and the title is "DC Potentiometer Using Sliding Wire Reel". technical field [0002] The invention relates to an instrument for measuring DC voltage. Background technique [0003] Application numbers 2005100623569, 2005100622674, 2005100622903, etc. have disclosed a DC potentiometer with three stepping discs and a double sliding line disc. The resistance value on the measuring disc is the same as that on the substituting disc. Every time a resistance is increased on the measuring disc, the substituting disc will reduce the same resistance. The resistance of the parallel part of the entering plate is equal, and when the third stepping plate is set with different indication values, the resistance value of the circuit remains unchanged. When the second step disc is not set to "0", the third step disc is set to a different indication value, and the r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R17/20
Inventor 骆晓英
Owner HANGZHOU TIANYE COMM EQUIP