Tester of simulating weighing sensor weighing precision

Abstract

The invention discloses a tester of simulating weighing sensor weighing precision and belongs to the electronic measurement instrument technology field. The tester comprises an output voltage regulation circuit. The output voltage regulation circuit is divided into a fine tuning voltage circuit and a coarse tuning voltage circuit. The fine tuning voltage circuit and the coarse tuning voltage circuit are connected in series and then are connected with a supply voltage input terminal. Structures of the fine tuning voltage circuit and the coarse tuning voltage circuit are the same. Each structure comprises a resistance box and a potentiometer which are connected in parallel. A gear resistance ratio of the resistance boxes in the fine tuning voltage circuit and the coarse tuning voltage circuit is 1:5-20. Center taps of the two potentiometers are voltage signal output terminals. The tester possesses the following advantages that the structure is simple; manufacturing cost is low; voltage signal output precision is high; operation is convenient and so on. By using the tester to verify a weighing instrument, through coarse tuning and fine tuning knobs, any voltage signal output values can be rapidly and accurately provided so that instrument verification precision and working efficiency are increased.

Description

Technical field [0001] The invention relates to the technical field of electronic measuring instruments. Background technique [0002] At present, the load cell simulator used in the calibration weighing instrument can only roughly simulate the output signal of the load cell. In the calibration process of the analog sensor signal of the weighing instrument, the step value is large, and the weighing can only be analyzed qualitatively. Display the working status of the controller. If the required input signal is accurately given, it needs to be adjusted repeatedly. The operation is very inconvenient, which will cause calibration errors, and will extend the operating time, which will seriously affect the work efficiency and the quality of the instrument calibration. This affects the fairness of trade measurement and the impact of production process measurement on product quality. Summary of the invention [0003] The technical problem to be solved by the present invention is to prov...

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Problems solved by technology

[0002] At present, the load cell simulator used to check the weighing instrument can only roughly simulate the output signal of the load cell. During the calibration process of the analog sensor signal to the weighing instrument, the step value is large, and the weighing can only be analyzed qualitatively. Display the working status of the controller. If the required input signal is accurately given, it needs to be adjusted repeatedly. The operation is very inconvenient, which will cause calibration errors, and will prolong the operation time, seriously affecting the work efficiency and the quality of instrument calibration. Thus affecting the fairness of trade measurement and the impact of production process measurement on product quality

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