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BS EN IEC 60051-4:2021

BS EN IEC 60051-4:2021

$102.76

Direct acting indicating analogue electrical measuring instruments and their accessories title – Special requirements for frequency meters

Published By Publication Date Number of Pages
BSI 2021 20
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This part of IEC 60051 applies to direct acting indicating analogue frequency meters of the following types:

  • pointer-type frequency meters (as defined in 3.2.11 of IEC 60051-1:2016);

  • vibrating-reed frequency meters (as defined in 3.2.12 of IEC 60051-1:2016).

This document also applies to non-interchangeable accessories (as defined in 3.1.23 of IEC 60051-1:2016) used with frequency meters.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
9 FOREWORD
11 INTRODUCTION
12 1 Scope
2 Normative references
3 Terms and definitions
4 Description, classification and compliance
5 Requirements
5.1 Reference conditions
13 5.2 Limits of intrinsic uncertainty, fiducial value
5.2.1 Limits of intrinsic uncertainty
5.2.2 Correspondence between intrinsic uncertainty and accuracy class
5.2.3 Fiducial value
5.3 Nominal range of use and variations
5.3.1 Nominal range of use
Tables
Table 1 – Reference conditions and tolerances, in addition to those given in Table 2 of IEC 60051-1:2016 for testing purposes relating to the influence quantities
14 5.3.2 Limits of variations
5.3.3 Conditions for the determination of variations
5.4 Operating uncertainty, overall system uncertainty and variations
5.5 Electrical requirements
5.5.1 Electrical safety requirements
5.5.2 Self-heating
5.5.3 Permissible overloads
Table 2 – Limits of the nominal range of use and permissible variations in addition to those given in Table 3 of IEC 60051-1:2016
15 5.5.4 Limiting range of temperature
5.5.5 Deviation from zero
Table 3 – Overloads of short duration for frequency meters
16 5.5.6 Electromagnetic compatibility (EMC)
5.6 Constructional requirements
5.6.1 General constructional requirements
5.6.2 Damping
5.6.3 Sealing to prevent access
5.6.4 Scales
5.6.5 Stopper
5.6.6 Preferred values
5.6.7 Adjusters, mechanical and/or electrical
5.6.8 Effects of vibration and shock
5.6.9 Degrees of protection provided by enclosure
5.6.10 Terminals
6 Information, markings and symbols
6.1 Information
17 6.2 Markings, symbols and their locations
6.3 Markings relating to the reference values and nominal ranges of use of influence quantities
6.4 The symbols for marking instruments and accessories
6.5 Markings and symbols for terminals
6.5.1 Requirements for markings
6.5.2 Earthing (grounding) terminals
6.5.3 Measuring circuit terminals
6.5.4 Special markings for terminals
6.6 Instructions for use
7 Package
8 Test rules
18 Annex A (normative)Nonconformity classification of tests
Table A.1 – Nonconformity classification of tests

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BS EN IEC 60051-4:2021
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