ISO 7500-1:2018 PDF

Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1: Tension/compression testing machines — Calibration and verification of the force-measuring system

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Title (English):

ISO 7500-1:2018

Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1: Tension/compression testing machines — Calibration and verification of the force-measuring system

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 18
Publication date:: February 7, 2018
Edition:: ISO IS 7500 edition 5 version 1
ICS:: 77.040.10

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Description (English):

ISO 7500-1:2018 specifies the calibration and verification of tension/compression testing machines. The verification consists of: - a general inspection of the testing machine, including its accessories for the force application; - a calibration of the force-measuring system of the testing machine; - a confirmation that the performance properties of the testing machine achieve the limits given for a specified class. NOTE This document addresses the static calibration and verification of the force-measuring systems. The calibration values are not necessarily valid for high-speed or dynamic testing applications. Further information regarding dynamic effects is given in the Bibliography. CAUTION Some of the tests specified in this document involve the use of processes which can lead to a hazardous situation.

Technical details

Technical committee: ISO/TC 164/SC 1 - Uniaxial testing
SKU: ISO 7500-1:2018

Abstract

Overview

ISO 7500-1:2018 - "Metallic materials - Calibration and verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Calibration and verification of the force‑measuring system" defines requirements for the static calibration and verification of force‑measuring systems in tension/compression testing machines. The standard covers a general machine inspection, calibration of the force‑measuring system, and confirmation that performance meets limits for a specified class. Note: this part addresses static calibration only - calibration values are not necessarily valid for high‑speed or dynamic testing.

Key topics and requirements

General inspection of the testing machine and force application accessories (see Annex A). Calibration is carried out only if the machine is in good working order.
Calibration of the force‑measuring system for each force range and all force indicators in use. Instruments must have traceability to SI units.
Use of force‑proving instruments in accordance with ISO 376; dead weights may be used for forces below the smallest proving instrument. When using dead weights, relative force error shall be within ±0.1%.
Calibration procedure elements:
- Determination of resolution (analogue: pointer vs scale spacing; recommended pointer-to-scale ratios 1:2, 1:5 or 1:10; spacing ≥ 2.5 mm for one‑tenth divisions).
- Alignment of the force‑proving instrument and temperature compensation.
- Conditioning of machine and instrument prior to measurement.
- Application of discrete constant forces (increasing and/or decreasing series) and verification across ranges (overlap between instruments).
- Verification of accessories (recorders, pointers) and effects such as piston position differences.
Performance assessment metrics include relative indication error, repeatability error, relative reversibility error, and agreement between two force‑proving instruments.
Reporting and intervals: verification report requirements and recommended intervals between verifications are specified. Annex C discusses uncertainty of calibration results.
Safety note: some tests can create hazardous conditions - follow appropriate safety procedures.

Applications and who uses it

ISO 7500-1:2018 is used by:

Calibration and metrology laboratories performing force calibration and verification.
Materials testing laboratories and quality control departments that operate tensile/compression machines.
Manufacturers of testing machines and force‑measuring instruments for design verification and compliance.
Certification, inspection and accreditation bodies assessing machine performance and traceability. Practical uses include ensuring accurate tensile/compression test results, maintaining traceability of material test data, supporting quality assurance in R&D and production, and meeting regulatory or customer conformity requirements.

Related standards

ISO 376 - Calibration of force‑proving instruments used for verification of uniaxial testing machines (normative reference).
Other parts of the ISO 7500 series (see ISO website for a full list).

Keywords: ISO 7500-1:2018, calibration, verification, tension/compression testing machines, force‑measuring system, static uniaxial testing, ISO 376, force‑proving instrument, metrology, testing machine class.

Related standards

Mentioned in the description and other ISO standards

Abstract

Overview

Key topics and requirements

General inspection of the testing machine and force application accessories (see Annex A). Calibration is carried out only if the machine is in good working order.
Calibration of the force‑measuring system for each force range and all force indicators in use. Instruments must have traceability to SI units.
Use of force‑proving instruments in accordance with ISO 376; dead weights may be used for forces below the smallest proving instrument. When using dead weights, relative force error shall be within ±0.1%.
Calibration procedure elements:
- Determination of resolution (analogue: pointer vs scale spacing; recommended pointer-to-scale ratios 1:2, 1:5 or 1:10; spacing ≥ 2.5 mm for one‑tenth divisions).
- Alignment of the force‑proving instrument and temperature compensation.
- Conditioning of machine and instrument prior to measurement.
- Application of discrete constant forces (increasing and/or decreasing series) and verification across ranges (overlap between instruments).
- Verification of accessories (recorders, pointers) and effects such as piston position differences.
Performance assessment metrics include relative indication error, repeatability error, relative reversibility error, and agreement between two force‑proving instruments.
Reporting and intervals: verification report requirements and recommended intervals between verifications are specified. Annex C discusses uncertainty of calibration results.
Safety note: some tests can create hazardous conditions - follow appropriate safety procedures.

Applications and who uses it

ISO 7500-1:2018 is used by:

Calibration and metrology laboratories performing force calibration and verification.
Materials testing laboratories and quality control departments that operate tensile/compression machines.
Manufacturers of testing machines and force‑measuring instruments for design verification and compliance.
Certification, inspection and accreditation bodies assessing machine performance and traceability. Practical uses include ensuring accurate tensile/compression test results, maintaining traceability of material test data, supporting quality assurance in R&D and production, and meeting regulatory or customer conformity requirements.

Related standards

ISO 376 - Calibration of force‑proving instruments used for verification of uniaxial testing machines (normative reference).
Other parts of the ISO 7500 series (see ISO website for a full list).

ISO 7500-1:2018 PDF

Technical details

Abstract

Overview

Key topics and requirements

Applications and who uses it

Related standards

Related standards

Abstract

Overview

Key topics and requirements

Applications and who uses it

Related standards

Related standards

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