Method for calibrating measuring range of electronic balance

An electronic balance and range calibration technology, which is applied in the direction of weighing equipment testing/calibration, and can solve problems such as range drift and zero point drift

Active Publication Date: 2010-02-17
METTLER TOLEDO INSTR SHANGHAI +1
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Problems solved by technology

[0006] The purpose of the present invention is to propose a method for calibrating the range of an electronic balance to simultaneously solve the problems of range drift and zero point drift

Method used

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  • Method for calibrating measuring range of electronic balance
  • Method for calibrating measuring range of electronic balance

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

[0024] refer to figure 1 As shown, first, as in step 10, weigh and record the first no-load reading of the electronic balance. This no-load reading can be taken automatically by the electronic balance after initialization of the electronic balance calibration procedure. For example, what is read is the AD (analog-to-digital conversion) value x01 when the electronic balance is unloaded for the first time.

[0025] Next, step 20 weighs and records the reading of the electronic balance loaded with known mass weights. This step can be completed by loading standard weights of the same mass on the balance according to the balance calibration setting value Ls under the prompt of the electronic balance, wherein the loaded weights can be the full load value of the electronic balance, or be less than the full load value A weight value of known mass. For exampl...

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Abstract

The invention relates to a method for calibrating the measuring range of an electronic balance. The method comprises the following steps: a) weighing and recording a first unloaded read number of theelectronic balance; b) weighing and recording the read number of the electronic balance loaded with weights in known mass; c) weighing and recording a second unloaded read number of the electronic balance; d) calculating a new sensitivity coefficient and a zero correction coefficient according to the first and second unloaded read numbers and the loaded read number; and e) updating the sensitivitycoefficient and the zero correction coefficient of the electronic balance. The method for calibrating the measuring range of the electronic balance can simultaneously solve the problems of measuringrange drift and zero drift, and improve the calibration accuracy.

Description

technical field [0001] The invention relates to the calibration of electronic balances, in particular to an electronic balance range calibration method for electronic balance range calibration and zero drift correction. Background technique [0002] Since the electronic balance (such as electromagnetic force compensation type, resistance strain gauge type, vibrating wire type and other electronic balances) is assembled from several different parts, with the change of temperature and long-term operation, the zero point of the electronic balance and The measuring range often changes, resulting in inaccurate weighing results. Sometimes as the weighing location changes, such as from the 1st floor to the 10th floor or from Shanghai to Beijing, the measuring range will also change. [0003] On the other hand, Europe, the United States, etc. have strict requirements on the zero point and span drift of trade balances, which cannot exceed a certain maximum allowable value. China wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01G23/01
Inventor 孙卫祥J-C·埃默里王长林J－C·埃默里
Owner METTLER TOLEDO INSTR SHANGHAI
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