This part of IEC 60051 applies to direct acting indicating analogue frequency meters of the following types:<\/p>\n
pointer-type frequency meters (as defined in 3.2.11 of IEC 60051-1:2016);<\/p>\n<\/li>\n
vibrating-reed frequency meters (as defined in 3.2.12 of IEC 60051-1:2016).<\/p>\n<\/li>\n<\/ul>\n
This document also applies to non-interchangeable accessories (as defined in 3.1.23 of IEC 60051-1:2016) used with frequency meters.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions 4 Description, classification and compliance 5 Requirements 5.1 Reference conditions <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 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 \u2013 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 <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 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 \u2013 Limits of the nominal range of use and permissible variations in addition to those given in Table 3 of IEC 60051-1:2016 <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 5.5.4 Limiting range of temperature 5.5.5 Deviation from zero Table 3 \u2013 Overloads of short duration for frequency meters <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Annex A (normative)Nonconformity classification of tests Table A.1 \u2013 Nonconformity classification of tests <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Direct acting indicating analogue electrical measuring instruments and their accessories title – Special requirements for frequency meters<\/b><\/p>\n |