ISO 2690-1973 PDF

Full title and description

St ISO 2690-1973 — "Unrecorded magnetic tapes for instrumentation applications — Physical properties and test methods". This International Standard specifies required physical characteristics and the laboratory test methods for unrecorded magnetic tape intended for instrumentation and data-logging uses.

Abstract

ISO 2690:1973 defines the physical-property requirements (dimensional and mechanical) and the associated test procedures for unrecorded magnetic tape used in instrumentation applications. Typical test subjects include elastoplastic properties (permanent elongation and modulus), combustibility, longitudinal and transverse curl (curvature), layer-to-layer adhesion and coating resistance. The original edition is brief (2 pages) and has since been withdrawn.

General information

• Status: Withdrawn.
• Publication date: February 1973 (edition 1).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 35.220.22 (Magnetic tapes).
• Edition / version: Edition 1 (1973).
• Number of pages: 2 pages (short technical standard).

Scope

This standard applies to unrecorded magnetic tape produced for instrumentation (data-logging and measurement-recording) applications and gives the physical-property limits and standard test methods to verify those properties. It addresses required environmental conditioning for tests, minimum acceptable curvature and curl, combustibility requirements for materials, elastoplastic behaviour (permanent elongation and modulus), layer-to-layer adhesion and coating resistance among other physical checks.

Key topics and requirements

• Specification of test environment and sample conditioning (23 °C ±2 °C, 40–60 % RH) prior to measurement.
• Elastoplastic properties: permanent elongation, modulus of elasticity and related procedures.
• Longitudinal curvature and transverse curl (maximum allowable curl) limits and measurement methods.
• Layer-to-layer adhesion and adhesion/coating resistance tests (apparatus and procedures specified).
• Combustibility requirement: prohibition of materials that will continue to burn in a still CO2 atmosphere after ignition.

Typical use and users

Manufacturers of magnetic recording media (instrumentation-grade tape), test laboratories performing incoming inspection or qualification testing of tape for data acquisition systems, standards bodies and procurement/specification engineers in industries using tape-based instrumentation recorders (laboratories, industrial monitoring, aerospace and research organizations) are the typical users. The standard is used to verify that tape shipments meet minimum physical performance for reliable operation in instrumentation recorders.

Related standards

ISO 2690 is related to other standards on magnetic tape for instrumentation and interchange such as ISO 1859 (general dimensional requirements for unrecorded instrumentation tape) and several national adoptions/identical standards (for example AS 1072.2-1974 and various national equivalents). These related documents cover general dimensional requirements, interchange formats and complementary test/specification topics.

Keywords

magnetic tape, unrecorded tape, instrumentation tape, physical properties, test methods, longitudinal curvature, transverse curl, layer adhesion, combustibility, elastoplastic properties.

FAQ

Q: What is this standard?

A: ISO 2690:1973 is an International Standard titled "Unrecorded magnetic tapes for instrumentation applications — Physical properties and test methods" that defines physical requirements and test procedures for instrumentation-grade unrecorded magnetic tape.

Q: What does it cover?

A: It covers conditioning and test-environment requirements, elastoplastic properties (permanent elongation, modulus), longitudinal curvature and transverse curl limits, layer-to-layer adhesion, coating resistance and combustibility criteria — essentially the physical characteristics and how to measure them.

Q: Who typically uses it?

A: Tape manufacturers, incoming inspection and materials testing laboratories, procurement/specification engineers for instrumentation systems, and standards bodies or test houses working with magnetic recording media.

Q: Is it current or superseded?

A: ISO 2690:1973 has been withdrawn and is no longer a current active ISO publication (the record shows withdrawal in ISO cataloguing; many national adoptions based on it have also been withdrawn or superseded). Consult your national standards body for current applicable documents.

Q: Is it part of a series?

A: It is part of a family of standards addressing unrecorded magnetic tape for instrumentation and interchange — related documents include ISO 1859 (general dimensional requirements) and national/adopted equivalents such as AS 1072.2-1974 which is technically identical for the same subject matter.

Q: What are the key keywords?

A: Magnetic tape, instrumentation, physical properties, test methods, curl, curvature, adhesion, combustibility, elastoplastic behaviour.