SIST EN 2591-211:2004

• Abstract:

  This standard specifies a method for measuring the capacitance between two adjacent, or coaxial conductors, or between a conductor and ground as applies to connectors and contacts.; It shall be used together with EN 2591-100.

• Status: Published
• Publication Date: 30-Apr-2004
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: I08 - Imaginarni 08
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-May-2004
• Due Date: 01-May-2004
• Completion Date: 01-May-2004
• Ref Project: EN 2591-211:2002 - Aerospace series - Elements of electrical and optical connection - Test Methods - Part 211: Capacitance

• Refers: SIST EN 2591-100:2024 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 100: General
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-076:2020 - Aerospace series - Electrical contacts used in elements of connection - Part 076: Contacts, electrical, male, type A, crimp, class R - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 4644-001:2012 - Aerospace series - Connector, electrical and optical, rectangular, modular, rectangular inserts, operating temperature 175 °C (or 125 °C) continuous - Part 001: Technical specification
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-024:2009 - Aerospace series - Electrical contacts used in elements of connection - Part 024: Contacts, electrical, triaxial, size 8, male, type D, crimp, class S - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-069:2009 - Aerospace series - Electrical contacts used in elements of connection - Part 069: Contacts, electrical, coaxial, size 16, female, type D, solder, class P - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-071:2019 - Aerospace series - Electrical contacts used in elements of connection - Part 071: Contacts, electrical, female, type A, crimp, class S - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3660-004:2023 - Aerospace series - Cable outlet accessories for circular and rectangular electrical and optical connectors - Part 004: Cable outlet, style A, straight, unsealed with clamp strain relief - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3660-012:2008 - Aerospace series - Cable outlet accessories for circular and rectangular electrical and optical connectors - Part 012: Grommet nut, style A for EN 3372 - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-077:2020 - Aerospace series - Electrical contacts used in elements of connection - Part 077: Contacts, electrical, female, type A, crimp, class R - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-076:2012 - Aerospace series - Electrical contacts used in elements of connection - Part 076: Contacts, electrical, male, type A, crimp, class R - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 4639-102:2008 - Aerospace series - Connectors, optical, rectangular, modular, multicontact, 1,25 diameter ferrule, with removable alignment sleeve holder - Part 102: Optical contact for cable EN 4641-102 - Operating temperatures between - 55 °C and 100 °C - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-071:2008 - Aerospace series - Electrical contacts used in elements of connection - Part 071: Contacts, electrical, female, type A, crimp, class S - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3646-001:2009 - Aerospace series - Connectors, electrical, circular, bayonet coupling, operating temperature 175 °C or 200 °C continuous - Part 001: Technical specification
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-081:2019 - Aerospace series - Electrical contacts used in elements of connection - Part 081: Contacts size 22 for EN 2997, electrical, female, type A, crimp, class T - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-027:2019 - Aerospace series - Electrical contacts used in elements of connection - Part 027: Contacts, electrical, female, type A, crimp, class R - Product standard
• Effective Date: 28-Jan-2026

SIST EN 2591-211:2004 is a European test method for the aerospace sector, published by SIST as the Slovenian adoption of EN 2591-211:2002. It specifies how to measure capacitance on connectors and contacts, including between adjacent conductors, coaxial conductors, or a conductor and ground. The document is intended for testing aerospace electrical and optical connection elements, and it is used together with EN 2591-100.

What does SIST EN 2591-211:2004 specify?

SIST EN 2591-211:2004 specifies a measurement method for capacitance on aerospace connectors and contacts. The method covers capacitance between two adjacent conductors, between coaxial conductors, and between a conductor and ground.

The standard is organized into scope, normative references, specimen preparation, apparatus, test method, and requirement. In practice, that means it tells the user how to set up the specimen, what equipment to use, how to make the measurement, and what result is acceptable.

What are the key requirements of SIST EN 2591-211:2004?

SIST EN 2591-211:2004 focuses on a straightforward test setup, controlled measurement conditions, and comparison of the measured capacitance with the product standard limit. The key point is that the standard gives the method, while the product standard gives the allowable value.

Specimen preparation

Specimens shall be wired as specified in the product standard. Tests are performed with mated or unmated connectors, or with contacts, depending on what the product standard calls for.

This matters because the measured capacitance can change with assembly condition. A buyer, lab, or manufacturer needs to test the same configuration that the product standard requires.

The standard also says the test details must identify the test frequency, temperature, limit of accuracy if different, voltage magnitude if applicable, whether connectors are mated or unmated, whether contacts are assembled or not, the maximum permitted capacitance, and any deviation from the method.

Measuring equipment

The capacitance of the specimen shall be measured with a capacitance bridge or a suitable alternative. The inherent accuracy of the measuring equipment shall be - 0,5 % at 0,2 pF.

That is important for low-capacitance aerospace parts, where small measurement errors can affect acceptance. The test setup must be precise enough to support the specified limits.

Test conditions and frequency

Capacitance shall be measured at ambient temperature, 20 °C, or as specified. Preferred test frequencies are 1 kHz, 100 kHz, 1 MHz, and 3 MHz.

This means the user must control or record temperature and choose an appropriate frequency from the preferred set unless another condition is specified. Frequency selection matters because capacitance behavior can vary with frequency.

Measurement technique

The measurement technique shall minimize errors caused by the connections between the measuring apparatus and the specimen. The a.c. voltage across the specimen shall be as low as practicable.

In practice, this means lead effects and unintended loading should be reduced as much as possible. The test is intended to measure the specimen, not the test wiring.

Acceptance criterion

The measured capacitance shall not exceed the limit stated in the product standard.

This is the pass-fail rule for qualification or acceptance testing. The product standard supplies the target value; this document supplies the method used to verify it.

What terms does SIST EN 2591-211:2004 define?

• Capacitance - The electrical quantity measured between conductors or between a conductor and ground.
• Capacitance bridge - The instrument named in the standard for measuring capacitance.
• mated connectors - Connectors tested while engaged with each other.
• unmated connectors - Connectors tested while not engaged.
• contacts - The conductive elements that may be measured assembled in, or separate from, the connector.
• a.c. - Alternating current, used here for the test voltage across the specimen.
• r.m.s. - Root mean square, the way the voltage magnitude may be specified.

Who uses SIST EN 2591-211:2004?

SIST EN 2591-211:2004 is used by aerospace connector manufacturers, test laboratories, quality teams, and procurement or approval engineers. They use it for product verification, qualification testing, and acceptance checks on electrical and optical connection elements.

It is especially relevant where capacitance must be controlled between conductors or to ground, such as in connector and contact design. The standard gives a common test method so different organizations can measure the same way.

What changed in SIST EN 2591-211:2004 from the previous edition?

SIST EN 2591-211:2004 is identified as EN 2591-211:2002 in the document text.

Which standards are used with SIST EN 2591-211:2004?

• EN 2591-100 - The general part for aerospace electrical and optical connection test methods; this part is used together with the capacitance test method and provides the common framework.

What does the SIST EN 2591-211:2004 document contain?

The document contains a scope, one normative reference, specimen preparation instructions, apparatus requirements, a test method, and the acceptance requirement. It states that the test may be done on mated or unmated connectors, or on contacts, according to the product standard.

It also names the preferred test frequencies and the ambient temperature condition, which helps laboratories set up a repeatable measurement. The requirement section is simple: compare the measured capacitance with the limit in the product standard.

For test planning, the most useful content is the list of details that must be specified before testing. For execution, the most useful content is the equipment accuracy and the instruction to reduce connection-related error.

SLOVENSKI STANDARD
01-maj-2004
Aerospaces series - Elements of electrical and optical connection - Test Methods -
Part 211: Capacitance
Aerospaces series - Elements of electrical and optical connection - Test Methods - Part
211: Capacitance
Luft- und Raumfahrt - Elektrische und optische Verbindungselemente - Prüfverfahren -
Teil 211: Kapazität
Série aérospatiale - Organes de connexion électrique et optique - Méthodes d'essais -
Partie 211: Capacité
Ta slovenski standard je istoveten z: EN 2591-211:2002
ICS:
49.060 /HWDOVNDLQYHVROMVND Aerospace electric
HOHNWULþQDRSUHPDLQVLVWHPL equipment and systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 2591-211
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2002
ICS 49.060
English version
Aerospaces series - Elements of electrical and optical
connection - Test Methods - Part 211: Capacitance
Série aérospatiale - Organes de connexion électrique et Luft- und Raumfahrt - Elektrische und optische
optique - Méthodes d'essais - Partie 211: Capacité Verbindungselemente - Prüfverfahren - Teil 211: Kapazität
This European Standard was approved by CEN on 8 February 2002.
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Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
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© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2591-211:2002 E
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Foreword
This document (EN 2591-211:2002) has been prepared by the European Association of Aerospace
Manufacturers (AECMA).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of
AECMA, prior to its presentation to CEN.
This European Stan
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