DIN EN ISO 376 defines how to calibrate and classify force-proving instruments (such as force transducers and proving rings) that are used to verify the force-measuring performance of static uniaxial testing machines.
If you are unsure whether DIN EN ISO 376 is the right reference for your lab’s force verification approach (or how it should be paired with your machine verification standard), talk with our team about your setup and the standard your customer or auditor cites.
DIN EN ISO 376: Metallic materials – Calibration of force-proving instruments used for the verification of uniaxial testing machines
DIN EN ISO 376 is a calibration and classification standard for force-proving instruments used as reference devices during static force verification of uniaxial testing machines (for example, tension/compression frames).
It focuses on the performance of the force-proving instrument itself (how it is calibrated, how results are evaluated, and how the instrument is classified), rather than defining a material test method.
Quick Definition
What it is: A calibration procedure and classification approach for force-proving instruments used to verify uniaxial testing machines under static loading.
What it is not: A tensile or compression test method for materials; it is a metrology-focused document that supports force traceability and verification workflows.
What This Standard Covers
DIN EN ISO 376 addresses the calibration of force-proving instruments where force is derived from measuring elastic deformation (or a proportional quantity). It also includes a procedure to classify these instruments based on their calibration results.
In practical terms, it supports consistent, comparable calibration of reference force devices that are then used to check a testing machine’s indicated force in tension and/or compression.
Why This Standard Matters in Testing
Accurate force measurement is foundational for many mechanical tests run on uniaxial testing machines. When a lab or manufacturer needs traceable confidence in machine force indication, DIN EN ISO 376 is commonly used to define how the reference force device is calibrated and how its performance is stated.
This is particularly important when you must demonstrate controlled uncertainty, repeatable verification routines, or conformance to a required machine class in downstream verification standards.
Common Materials, Product Types, or Applications Covered
Although the title references metallic materials, DIN EN ISO 376 is primarily used for force metrology supporting uniaxial test machines across many industries. It is commonly encountered wherever force calibration/verification is required for static testing frames.
Typical use cases: Calibration labs, QA/QC labs with in-house verification programs, accredited testing facilities, and manufacturers maintaining controlled verification intervals for tensile/compression testing systems.
Common Test or Verification Workflow
DIN EN ISO 376 typically fits into a two-step force assurance path: first, the force-proving instrument is calibrated and classified; then, that calibrated instrument is used as the reference during a testing machine force verification.
Common workflow: (1) Calibrate the force-proving instrument over the intended force range(s) using a suitable force standard, (2) evaluate performance and assign a class per the standard’s criteria, (3) use the calibrated force-proving instrument to verify the testing machine’s force indication as part of a machine verification procedure.
Practical caution: If your verification plan depends on specific loading directions (tension vs. compression), mounting adapters, or force ranges, the force-proving instrument configuration and its calibrated range should match the way it will be used on the test frame.
Equipment Commonly Used for This Standard
DIN EN ISO 376 does not point to a single brand or machine model, but it strongly influences how calibration-capable equipment and accessories are specified.
Common equipment: Reference force-proving instruments (force transducers or proving rings), calibration machines or force standard systems suitable for static force application, mounting fixtures/adapters that maintain alignment, and instrumentation for signal conditioning and data capture (as applicable to the device type).
Quoting focus: The usable force range(s), loading direction(s), interface/mounting hardware, and how the reference device will be installed on the customer’s testing machine are typically the key details that drive the right configuration.
If you are selecting a reference load cell/proving device or a calibration setup to support this workflow, you can request a detailed quote based on your force ranges, mounting interfaces, and verification routine.
How to Read This Designation or Revision
DIN EN ISO 376 indicates an ISO standard adopted as a European Standard (EN) and implemented as a German standard (DIN).
Many purchasers and auditors cite a dated version (for example, with a year-month suffix). Because calibration reporting details and acceptance criteria can be edition-sensitive, match your procedure, certificate language, and any required class to the exact edition cited in your quality system or customer requirement.
Related Standards, Methods, or Frameworks
DIN EN ISO 376 is commonly used alongside uniaxial testing machine verification standards that require (or allow) force verification using calibrated force-proving instruments.
Common pairing: ISO 7500-1 (and national/EN adoptions) is widely used for calibration and verification of static uniaxial testing machines’ force-measuring systems, and it often relies on calibrated force-proving instruments to perform the verification.
Get help choosing a DIN EN ISO 376-ready force verification setup
If you need help matching a reference force device, mounting hardware, and force range coverage to the way you verify your tensile/compression system, contact our team with your machine capacity, direction(s) of use, and the class or acceptance target you need to meet.