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1、BRITISH STANDARD BS 9133:1973 Rules for the preparation of Detail specifications for Single turn low power rotary potentiometers of assessed quality Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:23:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9133:1973
2、BSI 02-2000 ISBN 0 580 34370 7 Foreword This British Standard, which has been prepared under the authority of the Telecommunication Industry Standards Committee gives the specific rules for the preparation of detail specifications for single turn low power rotary potentiometers of assessed quality a
3、nd should be read in conjunction with Section 2 of BS 9130 “Potentiometers of assessed quality: Generic data and methods of test”. It has been issued 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 purpo
4、ses of harmonization. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages Th
5、is document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 5 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since pu
6、blication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:23:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9133:1973 BSI 02-2000i Contents Page ForewordInside front cover 1Scope1 2Dimensions and outline drawings1 3Ratings and character
7、istics1 4Drying1 5Ordering information1 6Inspection Requirements1 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:23:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 0
8、2:23:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9133:1973 BSI 02-20001 1 Scope This British Standard prescribes those special rules for drafting, which in conjunction with the general rules contained in Section 2 of BS 9130, are required for the preparation of detail specifications for single
9、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 BS 9130. 2.2 Where possible, gauging dimensions shall be indicated upon the outline drawing on the front cover of the detail specification a
10、nd 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 potentiometer with full detail dimensions, where it
11、is not feasible to give this information on the front cover. It shall also identify the normal mounting means. 3 Ratings and characteristics (see 1.1.12 and 2.1.5 of BS 9130) 3.1 The standard values of ratings and characteristics shall be selected in accordance with 1.1.12 of BS 9130, except that th
12、e values of rated dissipation shall be limited to 10 W and below. 3.2 A statement of derating or a derating curve shall be given and shall be as shown in 2.1.5.2 of BS 9130. 3.3 The preferred rating for rotary switches attached to potentiometers is 1 A, 250 V a.c., 40 Hz to 60 Hz. 4 Drying When dryi
13、ng is required, the detail specification shall call for Procedure I of 1.2.4.1 of BS 9130. 5 Ordering information The detail specification shall require that the information listed in 1.1.15 of BS 9130 shall be given when potentiometers are ordered to the specification. 6 Inspection Requirements (se
14、e 2.2 of BS 9130) 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 BS 9000 (see 2.6.5 of BS 9000-1). 6.3 The schedule below shall be ap
15、plicable to each individual style in the full assessment class. InspectionBS 9130 reference and conditions of test Group ATo be applied on a sampling basis lot-by-lot, excepting subgroup A0 Subgroup A4 is not applicable Subgroup A0 Resistance a to c1.2.4.3.2 100 % inspection Subgroup A1 Visual inspe
16、ction Inspection level I, AQL 1.5 % 1.2.2 Subgroup A2Inspection level S-2, AQL 4.0 % Resistance a to b b to c 1.2.4.3.3 1.2.4.3.4 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:23:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9133:1973 2 BSI 02-2000 Inspe
17、ctionBS 9130 reference and conditions of test Subgroup A2 (continued) Continuity Rotational noise Switch contact resistance (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 Su
18、bgroup A5 CTR information1.1.11Attributes information for subgroup A2 without reference to the individual tests Group B Subgroup 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, AQL 4.0 % 1.2.3.
19、1 1.2.3.3 Subgroup B2 (D)Inspection level S-2, AQL 4.0 % Robustness of terminations Measurement Visual examination Solderability Measurement Visual examination Mechanical endurance (Potentiometers) Final measurements Visual examination Resistance a to c Starting torque, including switch (when fitted
20、) Rotational noise Sealing 1.2.6.1 1.2.6.3.2 1.2.7.1 Tensile Bending Resistance a to c Method 1 or 2 No load 2 500 cycles at 10 17 cycles per min 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 infor
21、mation1.1.11Attributes information for subgroup B1 without reference to the individual tests Group C Subgroup C1 Starting torque End-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
22、basis at three monthly intervals. Subgroup C5 is not applicable Sample size 13, Accept 1/Reject 2 1.2.5.1 1.2.5.3 1.2.5.5 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:23:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9133:1973 BSI 02-20003 InspectionBS 9
23、130 reference and conditions of test Subgroup C2 Minimum effective resistance and angle of ineffective rotation (where applicable) Resistance law Sample size 13, Accept 1/Reject 2 1.2.4.5 1.2.4.7 Subgroup C3 (D) (i) 7 specimens Sample size 13, Accept 2/Reject 3 Robustness of terminations Measurement
24、s 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 Measurements Effective cont
25、inuity 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 1.2.6.8Procedure 1 of Test
26、Z/ABDM of BS 2011 Subgroup C4 (D)Sample size 13, Accept 1/Reject 2 Electrical endurance (at 70 C) Final measurements Visual examination Resistance a to c Insulation resistance Rotational noise 1.2.7.41 000 h duration Method A or B to be specified Licensed Copy: London South Bank University, London S
27、outh Bank University, Fri Dec 08 02:23:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9133:1973 4 BSI 02-2000 InspectionBS 9130: reference and conditions of test Subgroup C6 CTR information1.1.11Attributes information shall be given for subgroups C1, C2, C3 and C4 without reference to the individu
28、al tests Measurements information shall be given for change in resistance in subgroup C4 Group D Subgroup D1 (D) To be applied on a sampling basis at three yearly intervals Sample size 13, Accept 1/1 Reject 2 Damp heat (steady state) Final measurements Isolation voltage Visual examination Resistance
29、 a to c Insulation resistance Starting torque Rotational noise Voltage proof After extended recovery (-/-/21 only) Insulation resistance 1.2.6.9 Method A or B to be specified Subgroup D2 (D)Sample size 13, Accept 1/Reject 2 Electrical endurance (at room temperature) Final measurements Visual examina
30、tion Resistance a to c Insulation resistance 1.2.7.31 000 h duration Subgroup D3 Temperature characteristic of resistance Sample size 13, Accept 1/Reject 2 1.2.4.12 Subgroup D4 Dimensions (detail) Sample size 13, Accept 1/Reject 2 1.2.3.2 Subgroup D5 (D)Sample size 13 (For CTR purposes only) Electri
31、cal endurance (at 70 C) 1.2.7.48 000 h duration Intermediate measurements at 168, 500, 1 000, 2 000 and 4 000 h Subgroup D6 (D)Sample size 13, Accept 2/Reject 3 Mechanical endurance Measurements Visual examination Resistance a to c Resistance a to b b to c Insulation resistance Starting torque Conti
32、nuity 1.2.7.125 000 cycles at 1017 cycles per min Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:23:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9133:1973 BSI 02-20005 InspectionBS 9130: reference and conditions of test Subgroup D6 (continued) Thrust/pul
33、l Voltage proof Rotational noise Sealing Mechanical Endurance of a switch (when fitted) 1.2.7.2 Method A or B to be specified Subgroup D7 CTR information1.1.11Attributes information shall be given for subgroups D1, D2, D3, D4 and D6 without reference to the individual tests Measurements information
34、shall be given for the change of resistance in subgroups D1, D5 and D6 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 02:23:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 9133:1973 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI
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