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Precision scale or mass comparator with module for detecting a measurement uncertainty

A technology for measuring uncertainty and determining modules. It is applied to weighing equipment with special properties/forms of materials, containers for laboratory use, and determining specific gravity by measuring pressure difference. It can solve the problem of external parameters affecting weighing. Results and other issues to achieve the effect of eliminating transmission errors

Inactive Publication Date: 2016-06-22
SARTORIUS LAB INSTR GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The problem with such high-resolution electronic precision scales and mass comparators is that there are a large number of external parameters that affect the weighing results
The computer has no influence on the overall weighing process; it only reads the weight from the scale

Method used

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  • Precision scale or mass comparator with module for detecting a measurement uncertainty
  • Precision scale or mass comparator with module for detecting a measurement uncertainty
  • Precision scale or mass comparator with module for detecting a measurement uncertainty

Examples

Experimental program
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Effect test

Embodiment Construction

[0031] exist figure 1 A high-resolution electronic precision balance is shown in , which in this example is capable of mass comparisons in all precision classes according to OIMLR111-1 and according to ASTME617-13.

[0032] The precision weighing device comprises a weighing cell 14 with a base 12 into which a weighing system 10 , not shown in detail, is mounted. Furthermore, the weighing cell 14 includes a weighing chamber 16 , which is formed by a draft shield with adjustable side walls 18 , a front wall 20 and a rear wall 22 . The weighing chamber 16 can be separated from the surroundings by means of a draft shield. The weighing pan 24 is used to support weighing objects.

[0033] Electronic evaluation system 26 embodied here as a separate component is electrically coupled via cable 28 to weighing cell 14 . A display unit 30 coupled to the evaluation system 26 serves both as a display and as a data input unit.

[0034] In particular, a processor 32 is installed in electr...

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PUM

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Abstract

The invention relates to a precision scale with a scale chamber (16), a windshield (18, 20, 22) which surrounds the scale chamber (16), an air conditioning module (34) which is removably arranged in the scale chamber (16), a processor (32) which is arranged in the precision scale, a data input unit which is arranged on the precision scale, and a data transmission path with which data can be exchanged between the air conditioning module (34) and the processor (32), said processor (32) containing a measurement uncertainty detection module (33) with which the measurement uncertainty of the scale can be ascertained. The invention also relates to an air conditioning module for electrically coupling to a precision scale in a removable manner, said air conditioning module (34) forming a sealed unit and having an air pressure sensor (62), a humidity sensor (54), an air temperature sensor (52), and a part of a data transmission path via which data can be transmitted to a processor outside of the air conditioning module. The invention finally relates to a method for determining the measurement uncertainty of a precision scale comprising a scale chamber (16) which is separated from the surroundings by a windshield and in which an air pressure sensor (62), a humidity sensor (54), and an air temperature sensor (52) are arranged, said sensors (52, 54, 62) being coupled to a processor (32). Goods to be weighed, in the form of a test object, are weighed, and the following steps are carried out: - ascertaining the air pressure, the humidity, and the air temperature in the scale chamber (16) using the sensors (52, 54, 62); - weighing the test object; - determining the standard uncertainty of the weighing method; - determining the standard uncertainty of the mass of the test object; and - ascertaining a total uncertainty of the scale result.

Description

technical field [0001] The invention relates to a precision weighing device or a mass comparator. Background technique [0002] The problem with such high-resolution electronic precision weighers and mass comparators is that a large number of external parameters influence the weighing result. When the measurement error should be less than 10 ppm in the mass determination of a test object or in the case of a weighing process, the operator has to also take into account the measurement uncertainty. [0003] The measurement uncertainty is influenced in particular by the air density present during the measurement, which has an effect on the buoyancy of the test object and is dependent on the ambient temperature, air pressure and air humidity. The user has an influence on the measurement result and thus on the measurement uncertainty, since the manner and method in which the measurement is carried out has an influence on how accurately the determined measurement result can be rep...

Claims

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Application Information

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IPC IPC(8): G01G21/28G01G23/48G01G17/04
CPCG01G17/04G01G23/48G01G21/286H01L21/67B01L3/021G01G19/303G05D11/00G01G21/22G01G23/01G01N9/26
Inventor 雷纳·雷德曼托马斯·佩尔奇西格·米利希托马斯·费林斯特芬·奥桑本诺·加策迈尔
Owner SARTORIUS LAB INSTR GMBH & CO KG
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