1、BRITISH STANDARD BS9133:1973 Rules for the preparation of Detailspecifications for Single turn low power rotary potentiometers of assessed qualityBS9133:1973 BSI 02-2000 ISBN 0 580 34370 7 Foreword This BritishStandard, which has been prepared under the authority of the Telecommunication Industry St
2、andards Committee gives the specific rules for the preparation of detail specifications for single turn low power rotary potentiometers of assessed quality and should be read in conjunction with Section2 of BS9130 “Potentiometers of assessed quality: Generic data and methods of test”. It has been is
3、sued in the United Kingdom, where it is urgently required but if a similar procedure is adopted in other countries changes will be considered for the purposes of harmonization. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are r
4、esponsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to5 and a back cover. This standard has been updated (see copyri
5、ght date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBS9133:1973 BSI 02-2000 i Contents Page Foreword Inside front cover 1 Scope 1 2 Dimensions and outline drawings 1 3 R
6、atings and characteristics 1 4 Drying 1 5 Ordering information 1 6 Inspection Requirements 1ii blankBS9133:1973 BSI 02-2000 1 1 Scope This BritishStandard prescribes those special rules for drafting, which in conjunction with the general rules contained in Section2 of BS9130, are required for the pr
7、eparation of detail specifications for single turn low power rotary potentiometers of assessed quality. 2 Dimensions and outline drawings 2.1 The spindle and bush dimensions shall preferably be chosen from BS9130. 2.2 Where possible, gauging dimensions shall be indicated upon the outline drawing on
8、the front cover of the detail specification and shall normally comprise the following: 1) Depth from mounting face. 2) Diameter. 3) Fixing dimensions. 4) Location of terminations. 5) Spindle and bush dimensions. 2.3 The detail specification shall contain an appendix giving the drawing of the potenti
9、ometer with full detail dimensions, where it is not feasible to give this information on the front cover. It shall also identify the normal mounting means. 3 Ratings and characteristics (see1.1.12 and2.1.5 of BS9130) 3.1 The standard values of ratings and characteristics shall be selected in accorda
10、nce with1.1.12 of BS9130, except that the values of rated dissipation shall be limited to10W and below. 3.2 A statement of derating or a derating curve shall be given and shall be as shown in2.1.5.2 of BS9130. 3.3 The preferred rating for rotary switches attached to potentiometers is1A,250V a.c.,40H
11、z to60Hz. 4 Drying When drying is required, the detail specification shall call for ProcedureI of1.2.4.1 of BS9130. 5 Ordering information The detail specification shall require that the information listed in1.1.15 of BS9130 shall be given when potentiometers are ordered to the specification. 6 Insp
12、ection Requirements (see2.2 of BS9130) 6.1 Where a subgroup contains more than one test, the tests shall be carried out in the order given in the schedule. 6.2 Samples submitted to tests which are marked as “(D)” shall not be accepted for release under BS9000 (see2.6.5 of BS9000-1). 6.3 The schedule
13、 below shall be applicable to each individual style in the full assessment class. Inspection BS9130 reference and conditions of test Group A To be applied on a sampling basis lot-by-lot, excepting subgroup A0 Subgroup A4 is not applicable Subgroup A0 Resistance a to c 1.2.4.3.2 100% inspection Subgr
14、oup A1 Visual inspection Inspection levelI, AQL1.5% 1.2.2 Subgroup A2 Inspection level S-2, AQL4.0% Resistance a to b b to c 1.2.4.3.3 1.2.4.3.4BS9133:1973 2 BSI 02-2000 Inspection BS9130 reference and conditions of test Subgroup A2 (continued) Continuity Rotational noise Switch contact resistance (
15、where appropriate) Voltage proof 1.2.4.2 1.2.4.13 1.2.4.9 1.2.4.10 Method A or B to be specified The test shall be applied to potentiometers and, where applicable, switches Subgroup A5 CTR information 1.1.11 Attributes information for subgroup A2 without reference to the individual tests Group B Sub
16、group B1 Dimensions (gauging) Total mechanical rotation To be applied on a sampling basis lot-by-lot Subgroups B3 to B7 are not applicable Inspection level S-2, AQL4.0% 1.2.3.1 1.2.3.3 Subgroup B2 (D) Inspection level S-2, AQL4.0% Robustness of terminations Measurement Visual examination Solderabili
17、ty Measurement Visual examination Mechanical endurance (Potentiometers) Final measurements Visual examination Resistance a to c Starting torque, including switch (when fitted) Rotational noise Sealing 1.2.6.1 1.2.6.3.2 1.2.7.1 Tensile Bending Resistance a to c Method1 or2 No load 2500cycles at1017cy
18、cles permin Method A or B to be specified Where a switch is fitted, the functional operation of the switch shall be checked by a suitable method Subgroup B8 CTR information 1.1.11 Attributes information for subgroup B1 without reference to the individual tests Group C Subgroup C1 Starting torque End
19、-stop torque Thrust and pull Final measurements continuity Resistance a to b (Laws A and B) or Resistance b to c (Law C) Visual examination To be applied on a sampling basis at three monthly intervals. Subgroup C5 is not applicable Sample size13, Accept1/Reject2 1.2.5.1 1.2.5.3 1.2.5.5BS9133:1973 BS
20、I 02-2000 3 Inspection BS9130 reference and conditions of test Subgroup C2 Minimum effective resistance and angle of ineffective rotation (where applicable) Resistance law Sample size13, Accept1/Reject2 1.2.4.5 1.2.4.7 Subgroup C3 (D) (i)7 specimens Sample size13, Accept2/Reject3 Robustness of termi
21、nations Measurements Visual examination Resistance a to c Resistance to soldering heat Measurements Resistance a to c Resistance a to b Resistance b to c 1.2.6.1 1.2.6.3.3 Tensile Bending (ii)6 specimens Change of temperature Bump Measurements Visual examination Resistance a to c Vibration Measureme
22、nts Effective continuity Visual examination Resistance a to c (iii) Specimens from(i) and(ii) combined Climatic sequence Final measurements Visual inspection Resistance a to c Insulation resistance Switch contact resistance Continuity Starting torque Voltage proof 1.2.6.4 1.2.6.6 1.2.6.5 1.2.6.8 Pro
23、cedure1 of Test Z/ABDM of BS2011 Subgroup C4 (D) Sample size13, Accept1/Reject2 Electrical endurance (at70 C) Final measurements Visual examination Resistance a to c Insulation resistance Rotational noise 1.2.7.4 1000h duration Method A or B to be specifiedBS9133:1973 4 BSI 02-2000 Inspection BS9130
24、: reference and conditions of test Subgroup C6 CTR information 1.1.11 Attributes information shall be given for subgroups C1, C2, C3 and C4 without reference to the individual tests Measurements information shall be given for change in resistance in subgroup C4 Group D Subgroup D1 (D) To be applied
25、on a sampling basis at three yearly intervals Sample size13, Accept1/1 Reject2 Damp heat (steady state) Final measurements Isolation voltage Visual examination Resistance a to c Insulation resistance Starting torque Rotational noise Voltage proof After extended recovery (-/-/21 only) Insulation resi
26、stance 1.2.6.9 Method A or B to be specified Subgroup D2 (D) Sample size13, Accept1/Reject2 Electrical endurance (atroom temperature) Final measurements Visual examination Resistance a to c Insulation resistance 1.2.7.3 1000h duration Subgroup D3 Temperature characteristic of resistance Sample size1
27、3, Accept1/Reject2 1.2.4.12 Subgroup D4 Dimensions (detail) Sample size13, Accept1/Reject2 1.2.3.2 Subgroup D5 (D) Sample size13 (For CTR purposes only) Electrical endurance (at70 C) 1.2.7.4 8000h duration Intermediate measurements at168,500,1000,2000 and4000h Subgroup D6 (D) Sample size13, Accept2/
28、Reject3 Mechanical endurance Measurements Visual examination Resistance a to c Resistance a to b b to c Insulation resistance Starting torque Continuity 1.2.7.1 25000cycles at1017cycles perminBS9133:1973 BSI 02-2000 5 Inspection BS9130: reference and conditions of test Subgroup D6 (continued) Thrust
29、/pull Voltage proof Rotational noise Sealing Mechanical Endurance of a switch (whenfitted) 1.2.7.2 Method A or B to be specified Subgroup D7 CTR information 1.1.11 Attributes information shall be given for subgroups D1, D2, D3, D4 and D6 without reference to the individual tests Measurements informa
30、tion shall be given for the change of resistance in subgroups D1, D5 and D6BS9133:1973 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the in
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