is/qc 410101 (1992): potentiometers for use in electronic ...ted and rotary preset potentiometers is...

Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

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“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

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“Step Out From the Old to the New”

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“The Right to Information, The Right to Live”

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“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS/QC 410101 (1992): Potentiometers for Use in ElectronicEquipment Blank Detail Specification: Lead-Screw Actuatedand Rotary Preset Potentiometers Assessment Level E [LITD5: Semiconductor and Other Electronic Components andDevices]

IS QC 410101 : 1992 IEC QC 410101 : 1989

INDIAN STANDARD

POTENTItiMETERS FOR USE IN ELECTRONIC EQUIPMENT

BlaaliDctrll Spedfiutioa: ’ Lead-Screw Actuated and Rotary Preset Potcntiometera

Amessment Level E

NATIONAL FOREWORD

This Indian Standard which is identical with IEC Pub 393-2-I/IEC QC 410101 : 1989 ‘Potentio- meters for use in electronic equipment - Part 2: Blank detail specification: Lead-screw actuated and rotary preset potentiometers: Assessment level E’, issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on the recommendation ofthe Resistors Sectional Committee (LTD14) and approval of the Electronics and Telecommunication Division Council.

In the adopted standard certain terminology and conventions arc however not identical to thoseused in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the worda ‘International Standard’ appear, referring to this standard, they should be read 0s ‘Indian Standard’.

b) Comma (,) has been used 01 a decimal marker while in Iqdiin Standard, the current practice L to use a point (.) as the decimal marker.

Cro. thir Indian Standard, the follotiiag International Standards are referred to. Read in their respective place the following:

International Standard Corresponding Indian Standard

IEC Pub 393-l: 1989 Potentiometers fo use in electronic equipment, Part I : Generic specification

IS QC 410000 : 1992 Potentiometers for use in electronic equipment. Generic specification

IEC Pub 393-2: 1989 Potentiometers for use in electronic equipment, Part 2 : Sectionalspecitication: Lead-screw actuated and rotary preset potentiometers

IS QC 410100 : 1992 Potentiometers for use in electronic equipment. Sectional specification : Lead-screw actuated and rotary preset potentiometers

The t&&al committee ruponsibk for tbc preparation of this standard haa reviewed the provisiona of the following Intemational Publicatioti and has decided that they are acceptable for ure iir conjunction with this _standard:

IEC Pub 63 : 1963 Preferred number series for raistors and capacitors

IEC Pub 410 : 1973 Sampling plans and prooodures for inqxction by attributes

1

IS QC 4lOldl : 1992 IIZQC 410’lOt’: 1989

‘Thii standard is intended primarily for use under the IECQ system. A regular Indian Standard for this component could be different, identical or similar to this standard.

Only the English language text in .the Intq+ional Standard has been retained while adopting it in this standard. ._

\

* 1 :’ ‘.,*

.,*

,.- .-

2

IS Qc 4101’01 : 1992 IECQC ~10101 : 1989

. ,,

i: ,. .~. ,. : . .:

,,.. ., .I.. ^,.>_. ,. . .

IFJTRODUCTION _. ,_/ ;..:: I,. ,: ,"?'_, ;

~ta.i.1 ,_s~,ec.if_~.c.at.~on.. i '_. :.. ,a.._ L :. ."^ / ..,

, : ‘-. ,,~ “.; ,;\. .:

A blank detail,,~~~,~~~~~~~~;.~s:_B supplementary doqument to the Sectional Specification and conta_i~~,~qu&emen;eDts for-style and_lay-outand minimum content Of detail Spfto4;$~@a&&~W+~ ??2$#j${ Specifications not bornplying with these require- . !"_ ,.A ,./,. L L. II mentS shall not be considered as being in accordance_ [email protected] nor shall they so be described. ( . .

,In.the p'ep&i_gn, qf _4eta~~..._gpe.~if'ications the conteN. of Sub-clause 1.4 of the Sectional Specification should be taken into account.

.;,-....i:,:. ,. ., The numbers between brackets- on the. first p'age corre&nd to, the~following information which shall be insertediin the position indicated.

Identification of the detail specification

,,,,,( 1,) The l~Internation,al .Electrotechn.ical Commission" or the National Standard Organization under whose authority the detail specification is drafted. . j (2) ,The & ::_. >>!_-’ t “T:‘.“; :,.:A: ’ j,; .‘G_

or National Standards number of the detail specification, aaLe of issue and any further .info.~sla.t"~~l?..r~q~~yed, by. the. nafional_ayatem. ,. . . ,.

(3) The number and issue number of the IEC or National Generic Specification.

/,^ ., ._ ,, . . . . . . . . ,, (5) A short description of the type.of potentiometer. _I. ~’

(6) Information on typical construction (when applicable) for example: non-wirewound, lead-screw actuated. : .+,

:;

Note. +@n. .the...pste_nF~~~s~~.~._~s. oaf. designed for use. in. printed board ap&i~ation.s,th~, shall be clearly ~t#@d:~& the detail specifiqation

, hi’-Xh_%j LpasJt<ip~:. :; .C.“.’ ; : . , > SE r ,I . . . ,- 1 ., : T. i

; .

. “.., 7, ” 1 _. _-..-_~,-l. .“l...X”.‘

(7)'Gucfine dra!&ng &th main &&&ons .,wh&?har~~of %aportance for? ,interchange- ability. and/or refer$?n#%&i.the, national or inQar~+$ior@ documents for out- .,. c 8 _i . .~ .I > ) 1., -,lloes. ~lternativ~ly.~".this dra!+ng.,may ~begiven .in...an.appendix.to the detail .i/ _., -, . . ._L ,..l specification. :

(8); Application ‘or g&up of applications covered and/cr askessment level.

Note. -The assessinent level(s) to be used in a detail specification ahall be, +elect+, fjy, the.,_se.ctiona_l .speci~iC~tjon,..Sub-chase 3.3.3. This implies that one blank detail specification may be used in combination with several assessment levels, provided the grouping of the tests does not change.

(9) Reference data on the most important properties, to allow comparison between the various potentiometer types.

IS QC410101:1992 'IECQC410101:1989

IEC 393-2-1-xXx (2) (1) QC, 410101-xxx

IEC 393-2-l (4) ELECTRONIC COMPONENTS OF ASSESSED QC 410101 QUALITY IN ACCORDANCE WITH:

(3)

Outline drawing and dinennions: ( . . . angle projection)

(7)

LEAD-SCREW ACTUATED AND ROTARY (5) PRESET POTENTIOMTERS

(When necessary'the dimensions may be given in an Appendix to the detail specification)

Typical construction: (6)

Terminal connections: Assessment level(s): E (8)

Information on the.availability of oomponents qualified to this detail specification Is given in the Qualified Products List.

(9)

TABLE I

Style Rated Limiting dissipation element at 70 l C voltegit

(WI (V d.c. or a.o. r.m.8.)

(IECpage7j 4

1.

1.1

1.2

1;3 RATINGS AND CHARACTERISTICS

IS QC 410101 : 1992 IEC QC 410101 : 1989

SECTION ONE-- GENERAL DATA

GENERAL DATA

RECOMMENDED METHOD(S) OF MOUNTING (to be inserted)

(See Sub-clause 1.4.2 of IEC Publication 393-2).

DIMENSIONS

(When necessary the dimensions may be given in an Appendix to the detail specification).

All dimensions are in millimetres or dnChSS and millimet.reS.

Resistance range* The range of values in each style is given in the Qualified Products List.

Tolerances on I’ated resistance

Resistance law

Temperature characteristic of resistance (20 'C to 70 'C) ( AR/R)

Temperature coefficient

Climatic category

Low air pressure

Limits-of resistance change (after 1 000-b electrical endurance test) !

t . . . 3

. . .

& i ;..s

< l ** ,q 0-6/Y

-/-/-

8.5 kPa (85 mbar)

*( . ..$R +'...a)

Starting torque

Total mechanical travel

Limiting moving contact current

Theoretical resolution (for wirewound types only)

. . . mN.m to . . . mN.m

. . . f . . . turns or . . .

. . . mA

. . . z

aThe preferred values are those of the E-series of I&C Publioation 63. ”

is ad 41~1Qi ; :x992 IEC QC 410141 : 1999

1.3.1 DERATING <’ $1 ,” ‘j ., ,‘, ,” -’ ;,, ; . . : .; .,a: r:. ‘. .T _._I_ ̂ .“, . ,. _... : . ..‘j ‘:. .;

Potentiometers covered by this specification are derated according to the following curve:

/ * .., .:I ___ ,

Note. -See also Sub&%&e 2.2.4 ‘;;‘f .-the’ sectional spegification i _ .‘ ’ ~

1.4 .RELATED DOCUMENTS .-, _

Generic Spe~ifi&t$,n I’” ’ ‘- ’ .I&, ,Publication 393-l (1989) : Potentiometer’s ‘for ““’ ‘lk$i -in electronic equipment.

Part’ 1: Generic Specification.

Sectional Specification: .fEC +&blicat.on 3gj_yc:t$jQi’: ‘~&&~“ro~&& ‘for

use in electronic equipmen . Part 2: Sectional Specification: Lead-&r& ’

actuated and rotary preset potentiometers. LI ,: ’

1.5 MARKING ;’ ,_-1 ‘” ~.- ”

, /I/ 7 .

The marking of the &m&n&t &id package shall be id’a&ordande kith’ the’- ’ requirements of IEC Publication 393-2, Sub-clause 1.5.

.,.. . .;*‘. ,-.y ,

Note. -The details+ of themarking of the component and package. shall be I given in -full ‘fn%re ‘detail specification.

1.6 ORDERING INFOR&TION ’ “’ ’ ” ‘: 8,‘. _ I 1. ,( .-. ., : : : ^; ,,-‘

: Orders for potentiometers covered by this specification shall contain, in.-. clear or in coded form, the following minimum information: .: <,l

-a> Rated resistance and tolerance on rated resistance. ,::.. 1 _ ./ ,. :

b) Resistance law (if other than linear). . ..- “. ..j

f.7

c) Number and issue ref’e&nce’of the detail specification and style ’ “” reference.

V’, ‘. _ ,: ,b__ ,,

CERTIFIED RECORDS OF RELEASKD LGTS ., -.;, _:. .‘~. I’ ;

Required/not required.

1.8 ADDITIONAL INFORMATION (not for inSpeCtiOn PUrpOSeS)

1.9

2. IBSPECTION REQUIREMENTS

2.1

2.1.1

2.1.2

IS ac41.0101:1992 IEC QC410101:,1999.

(The detail specification may Include information such as circuit diagrams, curves, drawings and notes needed for the clarlfination of the detail specification).

-_

ADDITIONAL OR INCREASED SEVERITIES OR REQUIREMENTS TO THOSE SPECIFIED IN THE GENERIC AND/OR SECTIONAL SPECIFICATION

Note. -Additions or increased requirements should be specified only when essential.

SECTION TWO - INSPECTION REQUIREMENTS

Procedures

For Qualification Approval the procedures shall be in accordance with the Sectional Specification, IEC Publication 393-2, Sub-clause 3.2,

. .

For Quality Conformanoe Inspection the test schedule (Table II) in- cludes sampling, perlodiclty, severities and requirements. The for- mation of inspection lots is covered by Sub-clause 3.3.1 ~1,' the Sec- tional Specification.

For the quality conformance Inspection the values representative of the whole approved range shall be tested within one year (Groups A, B and C only).

Note. -When drying is called for, Procedure I of Sub-clause 4.3 of the Generic Specification, IEC Publication 393-l shall be used.

b -- _

1 IS QC 410101 : 1992 EC QC 410101 : 1999

Notes 1.

2.

.3.

TABLE II,

Sub-clause number8 of tests and perf’ormanoe requirements refer to the generia specifloation for potentiometers, IEC Publication 393-1, ex- oept for some severities for environmental teats and limits of change in resistance or output ratio, which have to be taken from the rele- vant olauseq of the seotional specification, IBC Publication 393-2.

-Inspection levels and AQL*s are selected from IEC Publication 410: Sampling Plans and Procedures for Inspection by Attributes.

-In this table:

P = perlodicity (in. months!, n = ssmple size 0 = acceptance critwion (permitted number of defective81 D = destruotive ND = non-destructive IL 0 inspection level IEC -Publication 410 AQL = acceptable quality level

Sub-olause nraber ._ and Te8t

(bee Mote 1)

UROUP A IblSPECTIOI qlot-by-lot)

I Sub-proup Al

I 4.4.1 visu81 eurlnation

Sub-group A2.

4.6 Eleaent reslstanoe

I Sub-group A3

14.4.2 rimeis

Motes 4 to 8 on paSo 37

- D ;;

-

ND

- ND

- ND

Condition8 of test (see Note 1)

I

I L ii

L

bee Note 2)

II

II

S-2

4.0%

i.or

4.01 .

Performance requirements (see Note 1)

As in 4.4.1 Legible marking as specified in

end 1.5

of this specification

As in 4.6.3

A8 specified in this specifiaation

IS QC 410101 : 1992 IEC QC 410101 : is89

Sub-clause number D Conditions of test I A Performance %tid Teilf or (see Note 1). L Q requirements’ (see Note 1) ND L (see Note 1).

(see Note 2)

Sub-group A4

4.7 Terminal resistance

1.5 Continuity

I. 15 Rotationril noise

ND s-3 1.0%

Re3ietaWe 2 to 2 Resistance b to 2 $:::::

As in 4.5.2

Method. B, A@,: . . . ,( . ..n

1.12 Voltage proof (Insulated potentiometers only) (For mounting method see 1.1 of this specification and Note 8)

AS in 4.12.5

Norma1 air pressure

SROUP B INSPECTION (lot-by-lot)

i&b-group Bl D S-2 1.5%

I. 18 Starting As specified in torque this specification

r.31 Sealing Temperature: 85 l C to / As in 4.31.3 (if applioable) go l c

Sub-group B2 ND s-2 : 1.5%

Ii.32 $olderability Bolder bath method Good tinning as ‘Temperature: 235 t 5 ‘C evidenced by free Duration: 2 f 0.5 s flowing of the sol-

der with wetting of the terminations I

,

4: 45 Solvent SolGent: . . . Legible marking reeietanoe of ’ Solvent temperature: . . . the marking Method 1 (if applicable) Rubbing material: cotton

Wool

Reoovery: . . .

Notes 4 to 8 on page 37

9 (IECPWW

is QC 410101 : 1992 EC QC 410101 : 1989

;ub-clause number tnd Test see Note 1)

;ROUP C INSPECTION periodic)

iub-group Cl

1.14 Temperature characteristic of resistance

1.21 Locking torque (if applicable)

1.20 kd stop torque

1.22 Thrust and pull on spindle

1.4.4 Total mechanical travel

f

t I

- D

5;

-

JD

,Notes 4 to 8 on page 37

Cm p*ge 19)

c (

t

:onditions of test :see Note 1)

.ower-category ;emperature/20 "C !O 'C/70 "C

!O 'C/Upper category Zemperature

jutput ratio

risual examination

. For types fitted with end stops: As spe+.- fied in 4.20.1

Not less than five times the upper limit of the starting torque (unless other- wise stated by the detail specification)

- For types fitted with slipping clutches: As specified in 4.20.2

lnly the thrust shall )e applied. The pull is not applicable

Half of the specimens: As specified ir 4.22.2 Continuity

Remaining specimens: As specified in 4.22.3

Lead-screw styles: Effective operating turns . . .

Rotary styles

10

Sample size L criterion If accepta- ,ility (see

3

1). n -

8 1


h uab < -\ *-- % Uac

9s in 4.21.3

4s in 4.20.1

As in 4.20.2

Rs in 4.22.2

>701 of total nechanical travel

Rs specified in this specifiQation

IS ac410101:199i IECQC410101:1999

db-clause number nd Test see Note 1)

1..

.4.6 Effective electrical travel

ub-group C2A art of the sample f Sub-group C2

.30 Robustness of terminations

.33 Resistance to soldering heat

.

1.44 Component solvent. resistance (if applicable)

i.31 Sealing (if applicable)

.~--~-~----~--~-----'

D r D

-

- D

.-a

Bates 4 to 8 on page 37

Wditions of test see Note 1)

. Lead-screw styles:

. Rotary styles

Ihe test appropriate ;o the type of ter- ninations

Ikwal examination

Element resistance

- For Potentiometers designed for printed board applications: Method !A

- Par other potentio- tieters: Method 1B

Element resistance

Ferminal resistance: Resistance a to b Resistance E to 0

Solvent: . . . Solvent te+rature: . . Method 2

Recovery:. . . .

Temperature: 85 l C to 90 'C

ample.size critbrion T P

r F acct i1ity

ipta (se

ate P

3

e

C

-

-

'erformance tequirements ,see Note 1)

) 70% of the measured ;otal meohanical ravel

LS specified inthis ,pecifioation -

Ls in 4.30.8

ARgt(...H + . ..A.

b~gi(...SR + . ..a.

<...n C...sl

ke'detail' specification

Rs in 4.31.3

-i~-------r-------~.

IS QC 410101 : 1992 IEC QC 410101 : 1989

,ub-clause nudaber nd Test see Note 1)

Iub-group C2B lther part of sample If Cub-group C2

..34 Change of temperature

I. 36 .Bump (or shook) (see Note 5)

1.37 Shock (or bump) (see Note 5)

I. 35 Vibration (aee Note 6)

I Notes 4 to 8. on page 37

bnditiona of teat (see Note ii

See Note 4 BA 9 Lower category

temperature

RB t Upper category temperature

Visual examination

Output ratio

Element resistance

For mounting method aee 1.1 of this apeoifloation

Acoeleration: 39b m/a2

Number of bupa: J4 000

Visual examitiatlon

Element. resistance

For mounting method see 1.1 of this specification

Pulse shape: half--sine

Acceleration: 490 m/s2

Pulse duratloh: 11 ma

Visual examination

Element resistance

For mounting method aee 1.1 of this apeoificatlon

Prooed&e B4 .,

T- S &

ample size oriterion

fg ild otc P -

3

epta- (see

) 0

-

t

n

a

P r (

erformance squirementa 886 Note 1)

La in 4.34.5

&!i(... %

SFJ*L..%R + . ..a1

k In 4.36.3

YR&:(...%R + . ..A)

.

La in 4.37.3

AR,<i(..,$R + . ..n.

.

IS QC 410101 : 1992 IEC QC 410101 : 1989

. b-clause number d Test ee Note 1)

lb-group C2 bmbined sample ’ specimens of lb-groups k2A Id C2B

38 Climatiq sequenoe

- Dry heak

- Damp neat, cyclio, Test Db *first Oyoll

- Cold

- Low air pressure

D

,_. D

0


Conditions of test (8ee Note 1)

Prequency range : . . . Hz to . . . Hz

kPplitude: 0.75 PID or mooeleration 98 m/s2 ~~:;;ver is the leas

Sweep enduranoe

Total duration: 6 h 9ee Note 4

Beasuremnts during test glectrical continuity (As specified in 4.35.4)

Final measurement8 Visual examination

Output ratio

Element resistanoe

Vimal examination

Starting torque

8.5 kPa (85 mbar)

Voltage proof (Insulatec potentiometers only)

(For mounting method 2164 .l. 1 ‘of this specification and Note 8)

ample size criterion

#f aocepta- ility (see

13

b-w.

3‘ - .

1

I) n -

.-. 13

C

2

*erformance qequirements [see Note 1)

There shall be no iiscontinuity > ‘00 /=

Rs in 4.35.5

IUab (... S Dac

.

AR(+L..SR + . ..R. ~___________________.

Ls in 4.38.2.2

. . . mN.m to . . . mN.m

1s in 4.38.5.3

W page 29

IS QC 410101 : 1997 EC QC 416?01 i 1989

r h :ub-clause nudlber 8 md Test ( :see Note 1)

- Damps heat 3 cyclic, Test Db , remaining cycles

- D.C. load

- Isolation voltage

- Final . i measurements’

L iub-group C3

4 I,. 43.2 Blectrioal endurance at 70 l c


lee Note 7

ke ,Note 7

‘isual examination

llement resistanoe.

.nsulation resistanoe Insulated potentio- leters only) (For ounting method see .l. of this specifica- ion and Note 8).

ontinuity

karting torque

--c

S

S

i

E

I ( a m 1 t

C

S

V

T S

f

/

D

i=

. ’

1

1

‘oltage proof Qnsulatiec otentiometers ,only): For mounting method #ee 1.1 of this speoi- ‘ication and Note 89

uration: 1 000. h Loaded be&en 5 and 0 J,Z’^. C’.‘.> ..,:

Exsminati on at 48 h, 500 h and 1 COO ti:

Vfsual jexamination : A,!.’ “..‘..

Biement resistanoe I .,. 2,: c::: ]

onditions of test see Note 1)

Sample sizq L. oriterion >f accepta: Dility (see

““L ,. ’

1

‘erformance.-.. ,_ ‘equirements :_. 1 I, i :aee Note .l I,>,. ; SC.,.

Ls in 4.38.8

LS in 4.38.10.1 :

&7gt(...sR + ..a;

2100 MR

!s in 4.5.1

,.. mN.m to 1.. mN.m

LS in 4.38.10.7 ..,” I ,. _.,,j .i ^‘

(lEGpage 27)

ub-clause number nd Test see Note 1)

iub-group C4

I. 40 Mechanical endurance (potentiometers)

;ROUP D INSPECTION Iperiodic)

Sub-group Dl

1.39 Damp heat, steady state

- D #r ‘D

- D

D


:onditions of test :see Note 1)

Visual examination

Resistance a to b,

Element resistance

Pll specimens

Zxamination at 1 000 h: tnsulation resistance (Insulated potentio- Deters only) (For nounting method see 1.1 of this specification and Note 8)

Rotational noise, Method B, A8,: . . .

Number of cycles: 200

Rate :

- Rotary types: 5 to 10 cycles per minute

- Lead-screw types: . . .

Visual examination

Element resistance

Starting torque

Rotational noise, Method B,Aao:- . . .

1) Sub-clause 4.39.2.1 1st group: 2 specimens 2nd group: 3 specimens 3rd group: 3 specimens


f accepta- ili ote P

fsee I) n -

C -

-

1

-

1

3

12

-

8

P r

i

(

I

IS clc 410101 : 1992 IEC QC 410101 : 1989

* ,_,

erformance equirements see Note 1)

,

s in 4.43.2.6 1)

lR,(*(...$R.+ . ..R)

iR$k(...$R-+ . ..q)

)1 GR

< . . . R

LS in 4.40.6

PRg$(...$R + . ..R]

,.. mN.m to . . . mN.m

g . ..n

15

IS QC 410101 : 1992 IEC QC 410101 : 1989

Sub-clause number ind Test :see Note 1)

Sub-group D2

4.43.3 Electrical endurance at upper category temperature


- D It‘ ID

-

- D

Conditions of test (see Note 1)

?) Sub-clause 4.39.2.2 1st group: 4 specimens !nd group: 4 specimens

3.C. load (See Note 7)

kiolation voltage (See Note 7) (For mqunting method see 1.1 of this specification and Note 8)

Final measurements

lisualexamination

Element resistance

tnsulation resistance (Insulated potentio- neters only) (For nounting method see 1.1 of this speoifi- zation and Note 8)

Continuity

Starting torque

Rotational noise,

Method B, A@,: . . .

Voltage proof (Insulated potentiometers only) (For mounting method see 1.1 of’ this specification and Note 8)

Duration: 1 000 h

- Loaded between j! and c

Examination at 48 h,

500 h and 1 OOO‘h:

Visual examination

iample size I criterion ,f accepta& mity (588

36

I) n -

0

1

performance wquirements :see Not8 1)

Ls in 4.39.4

LS in 4.39.6.1

AR(t(...SFi l . ..R)

2100 Mn

\s in 4.5.1

,.. mN.m to . . . . aN.m

.!

g...n

4s in’ 4.39.6.8

Rs in ‘4.43.3.1 13

16

.

ub-clause ~number nd Test see Note 1)

bb-group D3

1.4.3 Dimensions (detail)

Sub-group D4

I. 43 Electrical endurance at temperatures other than 70 OC (if applicable:

- D r ID

-

- ID

- D

.

Conditions of test see Note 1)

Element resistance

Loaded between 5 andb

Examination at 48 h, 500 h and 1 000 h:

Visual examination

Resistance 5 to 2

Element resistance

Lll specimens

bamination at 1 000 h

Insulation resistance (In%ulated potentiome- Gers only) (For mounting nethod see 1.1 of this specification and Jote 8)

(This sub-group is only applicable if a deratine curve other than those shown in 2.2.3 of the sectional specification is claimed in the detail specification)

Duration: 1 000 h

loaded between 8 and c Examination at 48 h, 500 h and 1 000 h:

Notes 4 to 8 on page 37 ,

17


Nf accepta- ili ote P -

T

-

36

(see 1 n -

s

s

-

1

- 1

P r r (

IS QC 410101 : 1992 IEC QC 410101 : 1989

‘erformance aquirdments see Note .l)

hR<i(.. %R + . ..a)

is in 4.43.3.7 1)

hR<:f(...%~ + . ..n)

~R,<:“...%R + . ..n)

)l GQ

1s specified in ;his specification

W pIge 33) _’

5s QC410101 : 1992 ‘IEC QC 410101 : 1989

Sub-clause number md Test [see Note 1)

- D )r ID

-

-

:onditions of test :see N&e 1)

Visual examination

Element* resistance

- Loaded between 2 and b -

Examination at 48 h, 500 h and 1 000 h:

Visual examination

Resistance 5 to &

. Element resistance

ill specimens

bamination at 1 000 h:

Cnsulation resistance (Insulated potentiometers only) (For mounting nethod see 1.1 of this specification and Jote a) j


(m page 35) 18

Sample size k criterion >f accepta- >ility (see

1 I I

kte P

5) n -

-

C

1


1 Rs in 4.43.1.6 1’)

~R,(*(...$R + . ..a) ($for Sub-group

As in 4.43.1.6 1)

AR<*(...IR + . ..n) (;;,for Sub-group

AR<*(...$R + ..:Rl

>l GQ

I

I:

, IS QC 410101 : 1992 EC QC 410101 : 1989

i /

I Notes ‘4. -The requirements for preset potentiometers in' the test method shall apply.

aI 5. -The bump and shock test arc considered to be alternatives. The detail specification shall indicate which test applies.

6. -This test is applicable .to potentiometers of climatic categories 25/-/-, h_v-/-, 55/-/- and 65/-/-.

7. -The d.c. load test and the isolation voltage test are considered as alternatives. The detail specification shall indicate wilich test applies.

,8. -For methoa of mount&g see Sub-clause 4.12 or 4.13, as appropriate, of IEC Publication 393-1, with the following details:

1)

2)

Components designed as "mounted by the body" shall be mounted as in Sub-clause 4.12;1.

Components designed as "mounted by the terminations" shall be tested whilst mounted by their terminations on a printed board, irrespective of whether any holes exist which could permit mounting by the body.

is/qc 410101 (1992): potentiometers for use in electronic ...ted and rotary preset potentiometers is...

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