IEC 61935-1-2-2018 PDF

Full title and description

Specification for the testing of balanced and coaxial information technology cabling — Part 1‑2: Installed balanced cabling as specified in ISO/IEC 11801 — Additional requirements for measurement of resistance unbalance with field test instrumentation. This publication defines additional reference measurement procedures and the accuracy requirements for field testers measuring resistance unbalance in installed cabling systems.

Abstract

IEC 61935‑1‑2:2018 provides supplemental measurement procedures and performance requirements for field test instruments used to measure resistance unbalance in installed balanced cabling (as addressed by ISO/IEC 11801‑1). It clarifies how field testers should perform unbalance measurements and the accuracy levels required so results are consistent with the related generic cabling requirements.

General information

• Status: Published / Active.
• Publication date: 14 December 2018.
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 33.120.10 (Coaxial cables. Waveguides).
• Edition / version: Edition 1.0 (2018).
• Number of pages: 20 pages.

Scope

IEC 61935‑1‑2:2018 specifies additional reference measurement procedures for the measurement of resistance unbalance using field test instrumentation and sets requirements for the accuracy of such field testers to satisfy the measurement expectations of ISO/IEC 11801‑1 for installed balanced cabling. The standard is a supplement to IEC 61935‑1 and is intended to ensure repeatable, field‑practical methods for assessing resistance asymmetry between pair conductors in real installations.

Key topics and requirements

• Reference measurement procedures for resistance unbalance in installed balanced cabling.
• Accuracy and performance requirements for field testers measuring resistance unbalance.
• Test setup and connection instructions specific to in‑situ measurements.
• Relationship and normative references to IEC 61935‑1 and ISO/IEC 11801‑1.
• Guidance to achieve measurement reproducibility between different field instruments and operators.

Typical use and users

This standard is used by cabling test instrument manufacturers (to specify and validate instrument performance), field testers and installers (to perform and interpret resistance unbalance measurements), network commissioning teams, independent test laboratories, and standards committees working on cabling and cabling testing methodologies. It is referenced when verifying that field test equipment meets the accuracy needed to demonstrate compliance with ISO/IEC 11801‑1 requirements for installed cabling.

Related standards

Normative and related documents include IEC 61935‑1 (general testing of installed balanced cabling), ISO/IEC 11801 and ISO/IEC 11801‑1 (generic cabling requirements for customer premises), and national/adopted versions such as BS IEC 61935‑1‑2:2018. The publication forms part of the IEC 61935 series on cabling test methods and quality assurance.

Keywords

resistance unbalance, unbalance measurement, field tester accuracy, installed balanced cabling, ISO/IEC 11801, IEC 61935, cable testing, field instrumentation, cabling commissioning.

FAQ

Q: What is this standard?

A: IEC 61935‑1‑2:2018 is an international standard that provides additional procedures and accuracy requirements for measuring resistance unbalance in installed balanced cabling using field test instruments.

Q: What does it cover?

A: It covers reference measurement procedures, field test setup guidance, and the accuracy/performance requirements that field testers must meet to measure resistance unbalance in accordance with ISO/IEC 11801‑1 expectations.

Q: Who typically uses it?

A: Instrument manufacturers, cabling installers and technicians, test laboratories, commissioning engineers, and standards/quality personnel responsible for verification of installed cabling systems.

Q: Is it current or superseded?

A: As published on 14 December 2018, IEC 61935‑1‑2:2018 is the first edition (ED1) and is listed as a published/active IEC standard. Users should check IEC or their national standards body for any later revisions or amendments beyond the 2018 edition.

Q: Is it part of a series?

A: Yes. It is a part (1‑2) of the IEC 61935 family of standards addressing testing of balanced and coaxial information technology cabling; it supplements IEC 61935‑1 and works in conjunction with ISO/IEC 11801 series requirements.

Q: What are the key keywords?

A: Resistance unbalance, field test instrumentation, installed balanced cabling, ISO/IEC 11801‑1, cabling test procedures, IEC 61935.