IEC 60393-4:2023 is applicable to single-turn rotary power potentiometers wire-wound technology. Enamelled, cemented, moulded, enclosed. This specification is applicable to rotary potentiometers with nominal dissipation in excess of 10 W, the resistive element of which consists of a wire or a wound tape. All the potentiometers specified by this specification are slider-driven without reduction. Their stroke less than 360\u00b0 is limited by stops. This document specifies preferred ratings and characteristics and selects from IEC 60393-1, appropriate quality assessment procedures, tests and measuring methods. It provides general performance requirements for this type of potentiometer. This document gives the minimum performance requirements and test severities. Annex A lists the letters and symbols used in the clauses of this document. This edition includes the following significant technical changes with respect to the previous edition: a) the document structure has been organized to follow new sectional specification structure decided in TC 40; b) the information on the assessment level EZ and FZ (zero nonconforming) has been revised.<\/p>\n
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| 65<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 68<\/td>\n | Annex ZA (normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 69<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 71<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 73<\/td>\n | 1 Scope 2 Normative reference <\/td>\n<\/tr>\n | ||||||
| 74<\/td>\n | 3 Terms and definitions Figures Figure 1 \u2013 Schematic view <\/td>\n<\/tr>\n | ||||||
| 75<\/td>\n | 4 Preferred characteristics 4.1 General 4.2 Style and dimensions Figure 2 \u2013 Outline drawing and dimensions <\/td>\n<\/tr>\n | ||||||
| 76<\/td>\n | 4.3 Preferred climatic categories 4.4 Resistance law 4.5 Nominal total resistance 4.6 Tolerances on nominal total resistance 4.7 Rated dissipation Figure 3 \u2013 Rated dissipation curve <\/td>\n<\/tr>\n | ||||||
| 77<\/td>\n | 4.8 Limiting element voltage 4.9 Insulation voltage 4.10 Number of cycles of operation 4.11 Shaft rotational speed 5 Tests and test severities 5.1 General Figure 4 \u2013 Rated dissipation curve (example of larger area) <\/td>\n<\/tr>\n | ||||||
| 78<\/td>\n | 5.2 Mounting 5.3 Tests 5.3.1 Drying 5.3.2 Resistance measurement 5.3.3 Vibration 5.3.4 Bump 5.3.5 Shock <\/td>\n<\/tr>\n | ||||||
| 79<\/td>\n | 5.3.6 Temperature coefficients and temperature characteristics of resistance 6 Performance requirements 6.1 General 6.2 Limits for change in resistance or output voltage ratio 6.3 Limits for insulation resistance Tables Table 1 \u2013 Limits for change in resistance or output voltage ratio <\/td>\n<\/tr>\n | ||||||
| 80<\/td>\n | 6.4 Limits of temperature rise 6.5 Limits for resistance law 6.6 Limits for operating torque 6.7 Limits for end stop torque Table 2 \u2013 Limits for operating torque Table 3 \u2013 Limits for end stop torque <\/td>\n<\/tr>\n | ||||||
| 81<\/td>\n | 6.8 Limits for residual resistances 6.9 Visual inspection 6.9.1 General visual criteria 6.9.2 Visual criteria after tests 6.10 Solderability 7 Marking, packaging, and ordering information 7.1 Marking of the component <\/td>\n<\/tr>\n | ||||||
| 82<\/td>\n | 7.2 Marking for packaging 7.3 Additional marking 7.4 Ordering information 8 Detail specifications 8.1 General 8.2 Information to be specified in a detail specification 8.2.1 Outline drawing or illustration <\/td>\n<\/tr>\n | ||||||
| 83<\/td>\n | 8.2.2 Dimensions 8.2.3 Mounting 8.2.4 Resistance law 8.3 Ratings and characteristics 8.3.1 General 8.3.2 Nominal total resistance range 8.3.3 Marking 8.3.4 Ordering information <\/td>\n<\/tr>\n | ||||||
| 84<\/td>\n | 8.3.5 Additional information 9 Quality assessment procedures 9.1 General 9.2 Definitions 9.2.1 Primary stage of manufacture 9.2.2 Structurally similar components 9.3 Assessment level EZ 10 Qualification approval 10.1 General 10.2 Qualification approval based on the fixed sample size procedure sampling <\/td>\n<\/tr>\n | ||||||
| 85<\/td>\n | 10.3 Tests <\/td>\n<\/tr>\n | ||||||
| 86<\/td>\n | Table 4 \u2013 Test schedule for qualification approval <\/td>\n<\/tr>\n | ||||||
| 92<\/td>\n | 11 Quality conformance inspection 11.1 Formation of inspection lots <\/td>\n<\/tr>\n | ||||||
| 93<\/td>\n | 11.2 Test schedule 11.3 Assessment levels Table 5 \u2013 Quality conformance inspection: Lot-by-lot inspection <\/td>\n<\/tr>\n | ||||||
| 94<\/td>\n | Table 6 \u2013 Quality conformance inspection: Periodic testing <\/td>\n<\/tr>\n | ||||||
| 95<\/td>\n | 11.4 Delayed delivery 12 Apparatus for measuring mechanical accuracy 12.1 Dial indicator 12.2 Cylindrical shaft adaptor 12.3 Potentiometer mounting fixture 12.4 Potentiometer shaft holding fixture <\/td>\n<\/tr>\n | ||||||
| 96<\/td>\n | Annex A (informative)Letter symbols and abbreviations <\/td>\n<\/tr>\n | ||||||
| 98<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Tracked Changes. Potentiometers for use in electronic equipment – Sectional specification. Single-turn rotary power potentiometers<\/b><\/p>\n |