EN 61143-1:1994/A1:1997

Overview

EN 61143-1:1994/A1:1997 (adopted as SIST EN 61143-1:1999/A1:1999) is an amendment to the IEC standard that sets out definitions and general requirements for X-t recorders, a class of electrical measuring instruments used in the measurement of electrical and magnetic quantities. The amendment text was prepared by IEC Technical Committee 85 (Measuring equipment for electromagnetic quantities) and clarifies normative references and marking requirements.

This document is primarily a definitions-and-requirements standard rather than a performance specification. It is intended to support manufacturers, test laboratories and procurement teams by providing a common vocabulary and baseline marking and documentation expectations for X-t recorders.

Key Topics

• Scope and purpose: Establishes terminology and fundamental requirements applicable to X-t recorders within electrical measuring instrumentation.
• Normative references: The amendment updates referenced standards; specific deletions (for example, removal of IEC 60414 lines) are noted in the amendment record.
• Marking and symbols: Changes to marking tables are included (the amendment indicates deletions in the symbols and safety-related tables), helping ensure consistent identification and labeling of recorders.
• Documentation and conformity: Emphasises clear definitions to improve conformity assessment, test reporting and procurement specifications.

Applications

EN 61143-1:1994/A1:1997 is useful in several practical contexts:

• Manufacturers: Use the definitions and marking requirements to prepare user manuals, product labels and technical documentation that align with international expectations.
• Test laboratories and calibration facilities: Apply the standard as a reference when creating test protocols, reporting formats and conformity statements for X-t recorders.
• Procurement and compliance: Buyers and conformity assessors rely on common definitions to compare products, specify requirements in tenders, and verify compliance during acceptance testing.
• Standards adoption and national implementation: The document shows how IEC amendments are adopted by national bodies (example: CLC/SIST) and clarifies the status of normative references.

Related Standards

• IEC 61143-1:1994 (base document) - the original part 1 definitions and requirements for X-t recorders.
• EN 61143-1:1994 and national adoptions (SIST EN 61143-1:1999/A1:1999) - demonstrates national alignment with the amendment.
• References noted in the amendment: the text documents specific deletions from the normative references and tables (for example, lines referencing IEC 60414 were removed as part of the amendment).

For practitioners, this amendment clarifies wording and removes outdated references, improving consistency in marking and documentation for X-t recorders used across electrical measurement applications. For full compliance and implementation, consult the official published text of EN 61143-1:1994/A1:1997 and any national adoption documents.