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Portable potential difference meter

A potentiometer, portable technology, applied in the field of portable potentiometer, can solve the problem of not being able to measure voltage

Inactive Publication Date: 2005-09-28
骆乃光
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Among the currently commercially available portable potentiometers, the highest measurement voltage can only be 1V, and the voltage above 1V cannot be measured. Although a manufacturer has added a resistor divider part on the basis of the potentiometer to extend the range to 20V, that is, the UJ59 potential difference meter, but after all, it is different from the potentiometer that uses the principle of compensation method to measure

Method used

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  • Portable potential difference meter

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Embodiment Construction

[0009] In the figure, after using 2 sets of 3 AA batteries in parallel, they can obtain a DC voltage of about 3V in series. 1 And adjustment range 0 ~ 15Ω fine-tuning RP 2 It is then supplied to nodes A and B in the circuit. Between nodes A and B is a resistance network composed of resistance for measurement and resistance for limit conversion and setting resistance R 4 A series circuit, connected to node A is the measuring disc and resistor R 6 , There are three measuring disks, the first disk is composed of 22 20Ω resistors in series; the second disk is composed of 10 2Ω resistors in series, and the coaxial rotation with the second disk is its replacement disk II', when the second disk adds a When the resistance is 2Ω, a 2Ω resistor is subtracted from the substituting disk II' to ensure that the total resistance of the circuit and the center remains unchanged during the measurement. The third disk is a sliding wire disk, and the resistance value is 2.2Ω. The total resistan...

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Abstract

The portable potential difference meter for the measurement of DC voltage consists of work current regulating resistor, setting resistor and measuring resistor. The setting resistor has resistance of 50 ohms and work current of 5.5 mA. One meter with pointer is used to indicate whether the voltage on the setting resistor is equal to the reference voltage of 275 mV, and voltage difference is amplified in the operation amplifier. The work current regulating resistor is used to regulate the work current to 5.5 mA. The instrument has three measurement ranges and maximum measured voltage of 2.3 V.

Description

Technical field: [0001] The invention relates to an instrument for measuring DC voltage Background technique: [0002] Among the currently commercially available portable potentiometers, the highest measurement voltage can only be 1V, and the voltage above 1V cannot be measured. Although a manufacturer has added a resistor divider part on the basis of the potentiometer to extend the range to 20V, that is, the UJ59 potential difference Meter, but after all, it is different from the potentiometer that uses the principle of compensation method to measure. Invention content: [0003] The purpose of the invention is to design a multi-range DC potentiometer capable of measuring 2.3V with a compensation method principle. [0004] The present invention is realized through the following technical scheme: for the multi-range potentiometer, the resistance network used for measurement and the set resistance used for sampling the standard voltage are connected in series in the working...

Claims

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Application Information

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IPC IPC(8): G01R17/20
Inventor 骆乃光
Owner 骆乃光
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