Geometrical product specifications (GPS) - Dial test indicators (lever type) - Maximum permissible errors
1Key Takeaways
This standard applies to mechanical lever-type measuring instruments according to DIN EN ISO 9493 with scale division values of 0.01 mm (measuring range 0.5 mm, 0.8 mm and 1.6 mm) and 0.002 mm (measuring range 0.2 mm and 0.24 mm) and specifies the limit values for measurement deviations for these instruments.
2Expert Interpretation
This article provides an in-depth analysis of the draft German DIN 2270 standard, focusing on the measurement error limits for lever dial indicators. It covers the background of the standard revision, changes in technical parameters, its relevance to ISO 9493, and methods for verifying conformity. It also provides a detailed analysis of the MPEH, MPER, and MPE limits for different scale values, providing professional implementation guidance for precision measurement.
Standard Revision Background and Technological Evolution
The draft standard DIN 2270:2016-06 is a comprehensive revision of the 1985 edition, originating from the publication of DIN EN ISO 9493:2011-03. Notably, despite objections from German industry, ISO 9493, as a harmonized standard, no longer includes measurement error limits. To ensure these critical parameters are not lost, DIN has issued this supplementary standard, specifically specifying the measurement error limits for micrometers.
Scope of application and instrument specifications
This standard applies to mechanical lever micrometers that comply with DIN EN ISO 9493, covering two types of graduation value specifications:
| Graduation value (mm) | Measuring range (mm) | Main application areas |
|---|---|---|
| 0.01 | 0.5, 0.8, 1.6 | General industrial measurement |
| 0.002 | 0.2, 0.24 | High-precision and precision measurement |
The standard requires that at an ambient temperature of 20°C (according to DIN EN ISO 1) The maximum measuring force shall not exceed 0.5N, and the difference between the maximum and minimum measuring forces within the measuring range shall not exceed 0.15N.
Detailed explanation of measurement error limits
The standard specifies three types of key error parameters, applicable to any working position of the lever micrometer:
| Graduation value (mm) | Measurement range (mm) | MPEH(μm) | MPER(μm ) | MPE(μm) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.01 | 0.5 | 3 | 3 | 5 | ||||||||||||
| 0.01 | 0.8 | 3 | 5 | |||||||||||||
| 0.01 | Where MPEH represents the indication error limit, MPER represents the return error limit, and MPE represents the total measurement error limit. The requirements for high-precision instruments with a graduation value of 0.002mm are significantly stricter than those for instruments with a graduation value of 0.01mm. Conformity Verification MethodologyUnlike DIN EN ISO 14253-1:2013-12, this standard does not provide a declaration of conformity. Instead, the specification requires the use of the simple acceptance method defined in ISO/TR 14253-6:2012-11 for conformity verification, which uses the acceptance criterion that the specification area is equal to the acceptance area. The adoption of this approach reflects the practical considerations of the standard setters regarding the management of measurement uncertainty, particularly when using existing test methods, where a full demonstration of conformity to DIN EN ISO 14253-1 is often difficult to achieve. Recommendations and precautions for the implementation of the standardWhen implementing this standard, it is recommended to pay attention to the following key points:
It is particularly important to note that the error limits specified in this standard were determined before the release of DIN EN ISO 14253-1, and the impact of measurement uncertainty needs to be comprehensively considered in practical applications. Industry Impact and Technology OutlookThe release of DIN 2270:2016 reflects Germany's continued leadership in the field of precision measurement. By retaining the measurement error limit requirements, this standard provides important technical support for the German manufacturing industry, especially in high-end manufacturing fields such as automobiles, aerospace, and precision instruments. In the future, with the development of measurement technology, it is expected that such standards will be further integrated with the international standard system, but special provisions based on the actual needs of German industry will still play an important role. Relevant companies are advised to update their testing procedures in a timely manner to ensure compliance with the latest standard requirements. 3Version History5Citation Network0
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Referenced herein
Referenced by DIN 2270 E:2016-07
DIN EN ISO 1
DIN EN ISO 14253-1
DIN EN ISO 14978
DIN EN ISO 9493
ISO/TR 14253-6
6Frequently Asked QuestionsWhat is DIN 2270 E:2016-07?
DIN 2270 E:2016-07 — Geometrical product specifications (GPS) - Dial test indicators (lever type) - Maximum permissible errors is an international standard developed by German Institute for Standardization. This standard applies to mechanical lever-type measuring instruments according to DIN EN ISO 9493 with scale division values of 0.01 mm (measuring range 0.5 mm, 0.8 mm and 1.6 mm) and 0.002 mm (measuring range 0.2 mm and 0.24 mm) and specifies the...
What does DIN 2270 E:2016-07 cover?
This standard covers: This standard applies to mechanical lever-type measuring instruments according to DIN EN ISO 9493 with scale division values of 0.01 mm (measuring range 0.5 mm, 0.8 mm and 1.6 mm) and 0.002 mm (measuring range 0.2 mm and 0.24 mm) and specifies the limit values for measurement deviations for these...
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What is the latest version of DIN 2270 E:2016-07?
The current published version is DIN 2270 E:2016-07, published on 2016-07. Always check for amendments or pending revisions.
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