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Electronic Weighing Test Analysis, Electronic Scales Testing Process
Dec 21, 2017

Electronic weighing test analysis, electronic scales testing process
Accuracy of electronic weighing is to ensure the accuracy of the results of the first priority conditions. Weighing the procurement of various weighing instruments and supporting measuring instruments and testing equipment, must have the validity of the national measurement departments during the accreditation certificate, weighing units should have a specific testing system and supporting testing methods, regular maintenance, Test. Weighing personnel to be qualified by professional and technical training, if necessary, approved by the relevant departments to engage in the work.
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1) The principle of electronic weighing test
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"Weighing test" refers to the national statutory measurement department, to determine or confirm whether the measuring apparatus fully meet the requirements of test procedures and all the work done. The principle of weighing test is as follows:
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(1) All kinds of scales should be equipped with the corresponding fourth-class standard silicon code, the total mass of enamel code should meet or exceed the maximum amount of weight.
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(2) The accuracy of the weighing instrument should reach the "in use" tolerance standard stipulated in the "Verification Regulation of Weighing Apparatus".
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(3) mobile weighing instrument used for gravitation, each batch of goods should be calibrated prior to use before weighing.
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(4) Fixed scales should be established technical files, and check the technical data in accordance with the cycle to grasp the use, where with the instrument white school device, the instrument should be used before the school.
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(5) Measurement performance After passing the cycle test, the adjustable parts of the meter's display (including setting measurement parameters, such as linear transfer keys) should be sealed.
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(6) All kinds of scales for establishing technical files shall record the test data (including repeatability, comparison, etc.) in daily use in addition to the data of periodic verification records (original and transfer); Raw data and trimming data and the entire process should be recorded in detail for c
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2) Test case bench test case table re-use, before use, should be fully seized pirate mechanical parts, and test by weighing standard test accuracy. And test the record of the situation to prepare enterprises.
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(1) Check the structure of the weighing machine c scale body should be placed on a solid flat ground or bench, four real, in a state of horizontal, the scale body should be no damage, no deformation of the mechanical fracture, the lever knife, knife No obtuse, cracked, corroded, the correct convergence, no empty hanging paste affair. Measuring machine pole writing is clear, no bending deformation. Tour iron, iron without loss, complete package.
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(2) Check the mechanical properties. So that the weighing instrument is in a normal state and longitudinally push the weighing surface, and it should be able to swim freely. When the lateral force measuring lever is pressed horizontally, it should be able to automatically return to him. After pressing the measuring lever, it should be able to swing at a constant speed. Blunt balance adjustment should not be loose, Bai should be lateral displacement.
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(3) measurement of performance testing. The test of metrological performance is mainly carried out in seven aspects: ① Empty zero test; ⑦ Partial load test (each load-bearing lever arm ratio is correct); ③ Synthesis stress center test; Accuracy test; ⑤ Weighing test; ⑥ Repeatability test; ⑦ Sensitivity test. In order to ensure the bench scale performance measurement accuracy, sensitivity, stability and change.
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3) The test of the balance of the test ground In addition to the verification of the bench scale, the check of the main shaft of the ground balance should be added. This is mainly from the measurement of the invariance of the main balance itself, Vice ruler scale accuracy and measurement of the main rod itself several aspects of the test. Detailed verification methods can be found in the former Ministry of Machinery Industry Metrology "HG-85 fixed lever scale test procedures" o
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Bench scale, to balance the test cycle should be based on the use of the situation to determine, in principle, can not exceed 1 year. Repaired scales and newly installed scales should be checked immediately thereafter.
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4) track scale test railroad track scale by the railway department is responsible for measuring the railway station.
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5) The electronic scale verification Electronic scale a wide range, whether it is non-automatic electronic scale or automatic electronic scale, the whole machine has a measurement performance requirements, such as: Weighing accuracy, repeatability, stability, sensitivity, Resolution, partial load impact and other answers, so Roe broad scale must be run and cycle test.