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Specification for potentiometers of assessed quality: generic data and methods of test
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Available format(s): Hardcopy, PDF
Withdrawn date: 27-09-2012
Language(s): English
Published date: 29-02-1972
Publisher: British Standards Institution
Co-operating organizationsForewordSpecificationSection 1. Principles and mandatory procedures1.1 General matters1.1.1 Scope1.1.2 Related documents1.1.3 Terminology1.1.4 Letter symbols, signs and abbreviations1.1.5 Graphical symbols1.1.6 Marking of the component and package1.1.7 Eligibility for qualification approval1.1.8 Structurally similar components1.1.9 Delayed delivery1.1.10 Supplementary procedure for qualification approval1.1.11 Certified test records1.1.12 Standard ratings and characteristics1.1.13 Unchecked parameters1.1.14 Procedure to be followed in the event of failures in Group C or D inspection1.1.15 Ordering information1.1.16 Release for delivery before the completion of Group B tests1.2 Test procedures1.2.1 Test and measurement conditions1.2.2 Visual inspection1.2.3 Dimensioning and gauging procedures1.2.4 Electrical test procedures1.2.4.1 Drying1.2.4.2 Continuity1.2.4.3 Measurement of resistance1.2.4.4 Attenuation1.2.4.5 Minimum effective resistance and angle of ineffective rotation1.2.4.6 Effective resistance and angle of effective rotation1.2.4.7 Resistance law1.2.4.8 Matching of the resistance law (for tandem potentiometers only)1.2.4.9 Contact resistance of switch (where fitted)1.2.4.10 Voltage proof1.2.4.11 Insulation resistance1.2.4.12 Temperature characteristic of resistance1.2.4.13 Rotational noise1.2.5 Mechanical test procedures1.2.5.1 Starting torque1.2.5.2 Switch torque1.2.5.3 End stop torque1.2.5.4 Locking torque1.2.5.5 Thrust and pull on spindle1.2.5.6 Mechanical accuracy1.2.6 Environmental test procedures1.2.6.1 Robustness of terminations1.2.6.2 Sealing1.2.6.3 Soldering1.2.6.4 Change of temperature1.2.6.5 Vibration1.2.6.6 Bump1.2.6.7 Acceleration1.2.6.8 Climatic sequence1.2.6.9 Damp heat (steady state)1.2.7 Endurance test procedures1.2.7.1 Mechanical endurance (potentiometers)1.2.7.2 Mechanical endurance of switch (when fitted)1.2.7.3 Electrical endurance (at room temperature)1.2.7.4 Electrical endurance (at 70 deg C)1.2.7.5 Electrical endurance (at upper category temperature)Section 2. Rules for the preparation of detail specifications2.1 Basic information2.1.1 Originator of the specification2.1.2 The numbering of the detail specification2.1.3 Description of the component and intended application2.1.4 Outline drawing2.1.5 Ratings (including limiting conditions of use)2.1.6 Characteristics2.1.7 Related documents2.1.8 Additional information (not for inspection purposes)2.1.9 Instructions for ordering components2.1.10 Marking2.2 Inspection requirements2.2.1 Group A inspection2.2.2 Group B inspection2.2.3 Group C inspection2.2.4 Group D inspection2.3 Certified test records2.3.1 Guiding principles2.3.2 Attributes information2.3.3 Measurements information2.3.4 Explanatory informationAppendicesA Recommended scheme for the inspection of structurally similar componentsB Principles to be observed in the preparation of detail specifications when calling up related specificationsC Example of detail specificationsD Definitions and diagrams for precision potentiometersE Measurement of rotational noise: Method AF Measurement of rotational noise: Method BG Apparatus for measuring mechanical accuracyH Spindle and bush dimensions
General matters, terminology, test procedures (electrical, mechanical, environmental and endurance), general rules for drafting detail specifications.
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