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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.

! $ ' +-Satyanarayan Gangaram Pitroda

Invent a New India Using Knowledge

01 ' 5 Jawaharlal Nehru

Step Out From the Old to the New

1+, 1+Mazdoor Kisan Shakti Sangathan

The Right to Information, The Right to Live

! > 0 B BharthariNtiatakam

Knowledge is such a treasure which cannot be stolen

IS 196 (B) (1966): Atmospheric Conditions for Testing

(Revised)(BI-LINGUAL) [PGD 20: Engineering Standards]

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BIS 2012

B U R E A U O F I N D I A N S T A N D A R D SMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

ebZ@May 2012 ewY; oxZ@Price Group 2

vkbZ,l@IS 196 : 1966

Hkkjrh; ekud

ijh{k.k dh ok;qeaMyh; fLFkfr;ka iqujhf{kr

Indian Standard

ATMOSPHERIC CONDITIONS FOR TESTING

( Revised )

;wMhlh@UDC 620.1 : 551.52/.7

f}Hkk"kh@BilingualiquiZq"V@Reaffirmed 2001

H kk ek C;wjk s 2012

Hkkjrh; ekud C;wjksekud Hkou] 9 cgknqj 'kkg t+Qj ekxZ

ubZ fnYyh 110002

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bathfu;fjax ekud fo"k; lfefr] ihthMh 20

izkDdFku

0-10-10-10-10-1 bl Hkkjrh; ekud (iqujhf{kr) osQ elkSns dks bathfu;fjax ekud fo"k; lfefr }kjk vafre :i nsus rFkk vfHk;kaf=kdbathfu;fjax foHkkxh; ifj"kn }kjk vuqeksnu ds ckn 3 ekpZ 1966 dks Hkkjrh; ekud laLFkk }kjk xzg.k fd;k x;kA

0-20-20-20-20-2 ;g ekud igyh ckj 1950 dks tkjh fd;k x;k Fkk ftlesaijh{k.k dh ok;qeaMyh; fLFkfr;ka fufnZ"V dh xbZFkhaA ;giqujh{k.k bl ekud dks vkbZ,lvks dh leUo; lfefr }kjk vkbZbZlh ds lg;ksx ls ijh{k.k dh okrkoj.kh; fLFkfr;ksaij fd,x, uohure dk;Zds vuq:i cukus ds fy, fd;k x;k gSA

0-30-30-30-30-3 ijh{k.k dh tkus okyh lkexzh ds xq.kkeZ vkSj miLdjksa dh f;kRedrk ijh{k.k ds le; ifjos'k fLFkfr;ksatSls rkieku]lkis{k vknzZrk] nkc ls izHkkfor gksrh gSaA fofHkUu ijh{k.k iz;skx'kkykvksa@ijh{k.k dsanzksa dks feys ijh{k.k ifj.kkeksa dh rqyuk ds fy,;g vko';d gks tkrk gS fd mu ok;qeaMyh; fLFkfr;ksa vkSj vuqdwyu izf;kvksads fy, ekud fufnZ"V gks ftuosQ varxZr ijh{k.kfd;k tkuk gS vFkok ijh{k.k ls iwoZfdl izfr:i dks vuqdwfyr fd;k tk,A

0-40-40-40-40-4 izeq[k dkjd ftuds dkj.k dqN fLFkfr;ksadks Lohdkj dj fy;k x;k gS laf{kIr :i ls fuEufyf[kr :i esa fy, tk ldrsgSa%

Engineering Standards Sectional Committee, PGD 20

FOREWORD

0.1 This Indian Standard (Revised) was adopted by the Indian Standards Institution on 3 March 1966, after the

draft finalized by the Engineering Standards Sectional Committee had been approved by the Mechanical Engineering

Division Council.

0.2 This standard was first issued in 1950 specifying atmospheric conditions for testing. This revision has been

undertaken to bring this standard in line with the latest work done by the Co-ordinating Committee on Atmos-

pheric Conditions for Testing (ATCO) of ISO in collaboration with IEC.

0.3 The properties of materials and behaviour of equipment under test are influenced by atmospheric conditions,

such as the temperature, the relative humidity and the pressure of the ambient air at the time ofthe test. For

comparison of test results obtained by different test laboratories/testing centres, it becomes necessary to specify

standard atmospheric conditions and conditioning procedures, under which the test should be carried out or at

which specimen should be conditioned before the test.

0.4 The principal considerations that would justify the adoption of a set of conditions may be enumerated in short

as follows:

(Continued on third cover)

(rhljs doj ij tkjh)

vkbZ,l@IS 196 : 1966

i

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d) fufnZ"V rkieku ,oavknzZrk fLFkfr;kamu vfkdka'k ijh{k.kksa ds vuqdwy gksaftuds fy, ekud ok;qeaMyh; fLFkfr;kapkfg,a_

[k) ekud fLFkfr;ksads j[k&j[kko ds fy, vko';d miLdj laLFkkfir djus esalLrk rFkk j[k&j[kko esa vklku gks_ vkSjx) ekud fLFkfr;kaJfedksa ds fy, lqfokktud gksaA

0-50-50-50-50-5 ijh{k.k ds fy, varjkZ"Vh; rkSj ij lger ekud ok;qeaMyh; fLFkfr;ksa dh vko';drk rks vuqHko dh tkrh gS ijarq rkiekuesa vkSj ".kdfVcakh; vFkok mi&".kdfVcakh; {ks=kksa dh ok;qeaMyh; fLFkfr;ksa esa O;kid fHkUurk gksus ls gks ldrk gS fd ;sijh{k.k fLFkfr;ka lHkh {ks=kksa ds fy, mi;qDr u gksaA vkbZ,lvks ,oa vkbZbZlh dh dbZrduhdh lfefr;ksavkSj ok;qeaMyh; fLFkfr;ksaij vkbZ,lvks dh leUo; lfefr }kjk vkbZbZlh ds lg;ksx ls bl i{k dh foLr`r iM+rky dh vkSj mlus ok;qeaMyh; fLFkfr;ksads fuEufyf[kr rhu ekudksa dh vuq'kalk dh gS ftuesa ls gj ,d ns'k vius fy, lokZfkd mi;qDr ok;qeaMyh; fLFkfr;ksa dkp;u dj ldrs gSa%

d) 65 izfr'kr lkis{k vknzZrk ds lkFk20ls-

[k) 50 izfr'kr lkis{k vknZzrk ds lkFk23lsa-x) 65 izfr'kr lkis{k vknzZrk ds lkFk27lsa-

mijksDr ok;qeaMy (x) ".kdfVcakh; vFkok mi&".kdfVcakh; {ks=kksa ds fy, okafNr gS vkSj Hkkjr ds lrr~iz;Ru dsiQyLo:i bls varjkZ"Vh; Lrj ij Lohdkj dj fy;k x;k gSA bu ok;qeaMyh; fLFkfr;ksa dks vc Hkkjr ds fy, Lohdkj dj fy;kx;k gSA rkieku vkSj lkis{k vknzZrk (x) ds eku yacs dky esa Hkkjr ds dbZegoiw.kZdsanzksaij NkbZekSle dh ifjfLFkfr;ksa dsfo'ys"k.k ij vkkkfjr gSaA

(Continued from second cover)

a) Temperature and humidity conditions specified should be suited to a majority of tests requiring standard

atmospheric conditions;

b) Equipment required to maintain the standard conditions should be economical to install and easy to

maintain; and

c) The standard conditions should be within the comfort zone for workers.

0.5 Although the necessity for having an internationally agreed set of standard atmospheric conditions for test is

realized, the wide divergence of the atmospheric conditions in the temperate and tropical or sub-tropical regions

indicates that the same test conditions may not be suitable for all the zones. This aspect was examined in great

detail by the several technical committees of ISO and IEC, and the Co-ordinating Committee on Atmospheric

Conditions for Testing (ATCO) of ISO, in collaboration with IEC, has recommended the following three sets of

standard atmospheric conditions from which the individual countries could choose whichever is most suitable to

them:

a) 20C with 65 percent relative humidity

b) 23C with 50 percent relative humidity

c) 27C with 65 percent relative humidity

The atmosphere (c) above is intended for tropical and sub-tropical zones and this was accepted at the international

level as a result of continued efforts by India. This atmosphere has now been adopted for India. The values of

temperature and relative humidity in (c) are based on an analysis of the weather conditions of several important

centres of India spread over a long period.

(pkSFksdoj ij tkjh)

(Continued on fourth cover)

vkbZ,l@IS 196 : 1966

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(frljs doj lstkjh)0-60-60-60-60-6 dbZekeyksaesa] ekiu vfu;af=kr ok;qeaMy esaifjos'kxr fLFkfr;ksa esadjuk iM+rk gS] mnkgj.k ds fy, fo|qr eksVjsa] tujsVj]

VkaliQkeZj] fLopfx;j bR;kfn dk ijh{k.k ml le; vkSj LFkku ij O;kIr ok;qeaMyh; fLFkfr;ksaesafd;k tkrk gS tgkaekiu gksrk gSvkSj ,sls ekeyksaesa fu;af=kr okrkoj.k tSlk dksbZiz'u ughagksrk gSA

0-70-70-70-70-7 vfkdka'k vkS|ksfxd ijh{k.k esaok;qeaMyh; nkc dks ;nk&dnk gh fu;af=kr djus dh vko';drk gksrh gS tSlk fd rkieku

vkSj vknZzrk ds fy, fd;k tkrk gSA lkekU;r% ijh{k.k O;kIr ok;qeaMyh; nkc esa gh fd, tkrs gSaA blfy, nkc dh NwV lhekdk fofHkUu ekeyksaesaego Hkh fHkUu gksrk gS tks fd ekis tkus okys vfHky{k.kksadh nkc laosnu'khykrk ij fuHkZj djrk gSAvr,o vyx&vyx ekeyksaesa fLFkfr dh vko';drkuqlkj nkc NwV dks fufnZ"V djuk vko';d gSA ,sls ekeyksaesa lqkkj djusdk rF; Hkh fufnZ"V gksA

0-80-80-80-80-8 ;g vuqHko fd;k x;k gS fd dbZiz;kstuksagsrq varjkZ"Vh; rqyukRedrk ds vkkkj ij izeq[k varjkZ"Vh; rkieku] 20lsa- dksviukuk vfkd ykHkinz gksxkA mnkgj.k ds fy, Hkkj ,oaekiu ds vkkkjHkwr ekud dk ekiu] ewy ekudksadsalanHkZesaHkkSfrdfLFkjkad ,oa 'kq ekiu vkSj ,sls gh ijh{k.kksaesaekiu] midj.kksa dk va'k'kksku ds ijh{k.k bR;kfnA ,sls vkSj vU; ekeyksaesa;g okafNr gS fd tgka varjkZ"Vh; rqyukRedrk vfr egoiw.kZgks ogkaO;kIr ok;qeaMyh; fLFkfr;ksaesa ijh{k.k fd, tkus ijokLrfod ijh{k.k rFkk ekunaM ifjdyu djus ds fy, izeq[k varjkZ"Vh; rkieku dks viuk;k tk,A

0-90-90-90-90-9 bl ekud esafufnZ"V NwVksa ds lkFk ijh{k.k ds fy, ekud ok;qeaMyh; fLFkfr;ka vkS|ksfxd izdkj ds vfkdka'k ijh{k.kksa esaiz;ksx djus ds fy, vHkh"V gSaA bu fLFkfr;ksavkSj NwVksa dks lHkh ekeyksaesa f;kfUor u le>k tk,A dqN vioknksads mnkgj.kftUgas] lfEefyr djuk gS] fuEufyf[kr gSa%

(ikpos doj ij tkjh)

(Continued from third cover)

0.6 In many cases, measurements are necessarily made at ambient conditions in an uncontrolled atmosphere, for

example, electric motors, generators, transformers, switchgear, etc, are tested in the atmospheric conditions existing

at the time and at the place where measurement are made and no question of controlled atmosphere arises in such

cases.

0.7 In most industrial testing, it is seldom necessary to control the atmospheric pressure as is done in the case of

temperature and humidity. Tests are normally carried out at the prevailing atmospheric pressure. Tolerance limits

for pressure, therefore, have different significance in different cases depending on the pressure sensitivity of the

characteristic to be measured. It may, therefore, be necessary to specify the pressure tolerance in accordance with

the needs of the situation in individual cases. In such cases correction factors shall also be specified

0.8 It is realized that for many purposes the adoption of the primary international temperature, namely, 20C

would have great advantages on the grounds of international comparability, for example, measurements of basic

standard of weights and measures, physical constants and precision measurements in terms of the basic standards

as well as in such tests as the calibration of gauges, tools, etc. It is desirable that in such cases as well as in other

cases where international comparability is of prime importance, the primary international temperature shall be

adopted both for actually carrying out the test and for calculating the parameters when the test is carried out at the

prevailing atmospheric conditions.

0.9 The standard atmospheric conditions for testing together with the tolerances specified in this standard are

intended for use in most industrial types of tests, where a controlled atmosphere is necessary. These conditions

and tolerances shall not be considered as applicable in all cases. Typical examples where exceptions shall have to

be made include:

(Continued on fivth cover)

vkbZ,l@IS 196 : 1966

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(pkSFksdoj ls tkjh)d) ogkaueh vkSj vU; foy;ksa ls jfgr lkexzh dks 'kq"d djus dh fLFkfr;ka fufnZ"V gksuh pkfg,a tgka foy; ds DoFkukad

fcanq dk e rkieku vkSj NwVsalkexzh ij rkieku ds izHkko ij fuHkZj gksaA[k) fo'ks"k xq:Ro] viorZd lwpd vkSj ok"iu nkc tSls dqN jklk;fud vkSj HkkSfrd fLFkjkadksa dks27lsa- rkieku ls vyx

rkieku ij dqN dkj.kksa ls fufnZ"V djus dh vko';drk gks ldrh gSA vkadM+s miyCk u gksuk vkSj ekud rkieku

ls vyx rkieku dks iz;qDr djuk (rduhdh n`f"V ls) dqN ,ssls dkj.k gks ldrs gSaA vkadM+s miyCk u gksus dh fLFkfresa bu ekud fLFkfr;ksa ds vkkkj ij fLFkjkadksadk ;FkklaHko mYys[k fd;k tkuk pkfg, vkSj vkadM+s miyCk gksus rdvarfje vofk esavioknkRed fLFkfr;ka viukbZ tk,aA

x) dqN fukkZj.kksatSls nzO;ksa dh ';kurk] Bksl dh IykfLVdrk vkSj lkexzh dk ?kuRo Kkr djus ds fy, bl ekud lsvfkd NwV dh lw{e lhek,avisf{kr gksaA ,sls lHkh ekeyksa esaNwV dh mi;qDr lhek,afufnZ"V dh tk,a] ijarq ekudeku ij ;FkklaHko vkkkjHkwr rkieku j[kk tkuk pkfg,A

?k) fo'ks"k vfHky{k.kksaokys oqQN ,sls ijh{k.k tks oLrqvksa] lkexzh] miLdj] bR;knh] dh mi;qDrrk fuf'pr djus] fo|qr,oa bysDVkWfud midj.kksa vkSj miLdjksadh okrkoj.kh; ifj{k.kksatSlh dBksj fLFkfr;ksaesalsok osQ fy, vHkh"V gksaA

0-100-100-100-100-10 bl ekud osQ fukkZj.k osQ fy, mkjnk;h lfefr dk xBu vuqcak d esafn;k x;k gSA

0-110-110-110-110-11 ;g fuf'pr djus ds fy, fd bl ekud esanh xbZfdlh vis{kk fo'ks"k dk ikyu fd;k x;k gS ;k ugha] rks ijh{k.k ;kfo'ys"k.k osQ ifj.kke dks n'kkZus okys voyksdu ;k x.kuk }kjk izkIr vafre eku dks vkbZ,l 2 % 1960 ds vuqlkj iw.kkZafdr djfn;k tk,A iw.kkZafdr eku esa j[ks x, lkFkZd LFkkuksadh la[;k mruh gh gks ftruh bl ekud esa fufnZ"V eku dh gSA

*la[;kRed ekuksa ds iw.kkZadu laacakh fu;e (iqujhf{kr)A

(Continued from fourth cover)

a) Conditions for drying a material free from moisture and other solvents where a temperature of the orderof the boiling point of the solvent and tolerances depending on the effect of temperature on the material

shall have to be specified.

b) Certain chemical and physical constants, such as specific gravity, refractive index and vapour pressure,

may need be specified at temperatures other than the temperature of 27C, for reasons such as non-

availability of data and the desirability (from the technical point of view) of using a temperature other

than the standard. In cases of non-availability of data, efforts should be made as far as possible to specify

the constants on the basis of these standard conditions as the data become available, exceptional conditions

being adopted in the interim period.

c) Certain determinations, such as those of viscosity of liquids, plasticity of solids and density of materials,

require much finer limits of tolerance than those required by this standard. In all such cases, suitable

limits of tolerance shall be specified, but as far as possible the basic temperature should be retained at thestandard value.

d) Certain tests of specialized character which are intended to establish suitability of goods, materials,

equipment, etc, for service under severe conditions, such as climatic tests on electrical and electronic

components and equipments.

0.10 The composition of the Committee responsible for the preparation of this standard as given in Annex A.

0.11 For the purpose of deciding whether a particular requirement of this standard is complied with, the final

value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with

IS 2 : 1960*. The number of significant places retained in the rounded off value should be the same as that of

the specified value in this standard.

*Rules for rounding off numerical values (revised).

vkbZ,l@IS 196 : 1966

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vkbZ,l@IS 196 : 1966

Hkkjrh; ekud

ijh{k.k dh ok;qeaMyh; fLFkfr;ka iqujhf{kr

Indian Standard

ATMOSPHERIC CONDITIONS FOR TESTING

( Revised )

1 SCOPE

1.1 This standard specifies the atmospheric conditionsfor testing of materials, products, equipment, etc, and

applies to such tests where atmospheric conditions

need to be controlled to obtain comparable and

reproducible results or to conduct measurements where

test results obtained under different conditions have to

be reduced to standard conditions.

1.2 This standard does not apply to the basic standards

of weights and measures, to the precision measurement

made in terms of these basic standards and to such tests

as calibration of test gauges, precision tools, etc, and

to the cases covered in 0.9.

1.3 This standard is not applicable to cases where

testing is done under the atmospheric conditions

existing at the time and place where measurements are

made (for example electric motors, generators,

transformers, etc) and where no question of controlled

atmosphere arises.

2 TERMINOLOGY

2.0 For the purpose of this standard, the following

definitions shall apply.

2.1 Pre-conditioning The treatment of a sample of

material, product or equipment with the object ofremoving or partly counteracting the effect of its previous

history in respect, principally, of the temperature and

humidity to which it has been exposed. This treatment

usually precedes conditioning of the sample.

2.2 Conditioning The subjection of the sample to

an atmosphere of a specified relative humidity, or

complete immersion in water or other liquid, at a

specified temperature for a specified period of time.

NOTES

1 When the temperature and humidity for conditioning are

the same as those prescribed for pre-conditioning, the

pre-conditioning and conditioning may be merged and thepre-conditioning may be said to take the place of conditioning.

1 fo"k; {ks=k1 fo"k; {ks=k1 fo"k; {ks=k1 fo"k; {ks=k1 fo"k; {ks=k

1-11-11-11-11-1 bl ekud esalkexzh] mRikn] miLdj bR;kfn ds ijh{k.kdh ok;qeaMyh; fLFkfr;kafufnZ"V dh xbZgSa vkSj ;g ,slsijh{k.kksads fy, gSa tgka rqyukRed ,oaiquZmRikns; ifj.kkeysus ds fy, ok;qeaMyh; fLFkfr;ksa dks fu;af=kr djuk gksvFkok fofHkUu fLFkfr;ksa esa fy, x, ijh{k.k ifj.kkeksa dksekud fLFkfr;ksaesaykus ds fy, ekiu djuk gksA

1-21-21-21-21-2 ;g ekud eki ,oarkSy ds vkkkjHkwr ekudksa] bu ewyekudksads lanHkZls fy, x, ifj'kq eki vkSj ijh{k.k ekiudk va'k'kksku] ifj'kqrk midj.k bR;kfn tSls ijh{k.kksarFkk0-90-90-90-90-9esa fn, x, ekeyksaij ykxwughagksrk gSA

1-31-31-31-31-3 ;g ekud mu ekeyksaij ykxwugha gksrk gS tgkaekiufd, x, le; vkSj LFkku ij fo|eku ok;qeaMyh; fLFkfr;ksaesa ijh{k.k fd;k x;k gks (mnkgj.k ds fy,] bysfDVd eksVj]tujsVj] VkliQkWeZj bR;kfn) vkSj tgkafu;af=kr ok;qeaMy dkdksbZ iz'u ugha curk gSA

2 ikfjHkkf"kd 'kCnkoyh2 ikfjHkkf"kd 'kCnkoyh2 ikfjHkkf"kd 'kCnkoyh2 ikfjHkkf"kd 'kCnkoyh2 ikfjHkkf"kd 'kCnkoyh

2-02-02-02-02-0 bl ekud osQ iz;kstukFkZfuEufyf[kr ifjHkk"kk,aykxwgksaxhA

2-1 iwoZ&vqudwyu2-1 iwoZ&vqudwyu2-1 iwoZ&vqudwyu2-1 iwoZ&vqudwyu2-1 iwoZ&vqudwyu lkexzh] mRikn vFkok miLdj dk bly{; ds lkFk mipkj djuk ftlls mlds laidZ esavkus okysrkieku ,oa vknzZrk ds lanHkZ esa] lSkafrd :i ls] mldsfoxr izHkko dks gVk;k ;k vkaf'kd rkSj ij izfrdkj fd;k tkldsA ;g mipkj lkekU;r% uewus ds vuqdwyu ls iwoZfd;ktkrk gSA

2-2 vuqdwyu2-2 vuqdwyu2-2 vuqdwyu2-2 vuqdwyu2-2 vuqdwyu uewus dk fufnZ"V vofk ds fy, fn, x,rkieku ij fufnZ"V lkis{k vknzZrk ds ok;qnkc vFkok ty ;kvU; nzO; esa iw.kZ fueTtuA

fVIi.kh;k11111 vuqdwyu vkSj iwoZ&vuqdwyu ds fy, fufnZ"V rkieku vkSj vknZzrk

ds leku gksus ij iwoZ&vuqdwyu vkSj vuqdwyu dks feyk;k tk ldrkgS vkSj vuqdwyu dk LFkku iwoZ&vuqdwyu ys ldrk gSA

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vkbZ,l@IS 196 : 1966

2 According to circumstances, the space used for measurement

and conditioning may be a whole laboratory room in which the

specified conditions are maintained within the prescribed

tolerances, or a special test chamber.

2.3 Standard Test Atmosphere The atmosphere inwhich tests are conducted or to which the parameters

are calculated.

2.4 Ambient Atmosphere The atmosphere

surrounding the sample of material or equipment to be

tested.

3 STANDARD CONDITIONS

3.1 Standard Test Atmosphere

3.1.1 The standard test atmosphere shall be:

Temperature : 27CRelative humidity : 65 percent

Air pressure : 1 013 mbar (760 mmHg)

NOTE Wherever international comparability becomes

necessary, the international accepted atmospheric conditions, for

example, 20C and 65 percent relative humidity in the case of

basic standards of weights and measures, electrical and

electronic industry; and 15C in the case of alcohol and

petroleum products, may be adopted (see also 0.8 and 0.9).

3.1.2 This atmosphere shall be used either for actually

carrying out the test or for calculating the parameters when

the tests are carried out at any other atmospheric

conditions, the law of dependence of the parameter on

temperature and/or humidity and/or pressure being known.

3.2 Range of Ambient Atmospheric Conditions for

Testing Wherever the parameters to be measured

are not materially affected within a range of temperature

and relative humidity it may not be necessary to carry

out the measurements at the standard test atmosphere

mentioned in 3.1. In such cases the measurements may

be carried out within the following range:

Temperature : 15 to 35C

Relative humidity : 45 to 75 percent

Air pressure : 860 to 1 060 mbar

3.2.1 The above temperature range may, however, be

10 to 40C in special cases.

4 TOLERANCES ON STANDARD TEST

ATMOSPHERE

4.1 Temperature and Humidity There shall be

two classes of tolerances, normal and close. The normal

tolerance shall be 2C on temperature and 5 percent

on relative humidity and the close tolerance shall be

1C on temperature and 2 percent on relativehumidity at any point in the test room or chamber.

22222 ifjfLFkfruqlkj ekiu vkSj vuqdwyu gsrq ml iz;ksx'kkyk vFkokfo'ks"k ijh{k.k pSEcj d{k dk iwjk LFkku iz;qDr fd;k tk ldrk gStgka fufnZ"V NwV osQ Hkhrj fufnZ"V fLFkfr;ksa dk j[k&j[kko fd;ktkuk gksA

2-3 ekud ijh{k.k ok;qeaMy 2-3 ekud ijh{k.k ok;qeaMy 2-3 ekud ijh{k.k ok;qeaMy 2-3 ekud ijh{k.k ok;qeaMy 2-3 ekud ijh{k.k ok;qeaMy og ok;qeaMy ftlesaijh{k.k fd;k tkrk gS vFkok ftlds fy, ekunaMksadk ifjdyufd;k tkrk gSA

2-4 ifjos'k rkieku2-4 ifjos'k rkieku2-4 ifjos'k rkieku2-4 ifjos'k rkieku2-4 ifjos'k rkieku ijh{k.k dh tkus okyh lkexzh vFkokmiLdj ds uewus ds vkl&ikl dk okrkoj.kA

3 ekud fLFkfr;ka3 ekud fLFkfr;ka3 ekud fLFkfr;ka3 ekud fLFkfr;ka3 ekud fLFkfr;ka

3-1 ekud ijh{k.k okrkoj.k3-1 ekud ijh{k.k okrkoj.k3-1 ekud ijh{k.k okrkoj.k3-1 ekud ijh{k.k okrkoj.k3-1 ekud ijh{k.k okrkoj.k

3-1-13-1-13-1-13-1-13-1-1 ekud ijh{k.k okrkoj.k gksxk%

rkieku % 27lsa-

lkis{k vknZzrk % 65 izfr'krok;qnkc % 1 013 ,eckj (760 ,e,e,pth)

fVIi.kh tgka dgha varjkZ"Vh; rqyukRedrk vko';d gks ogkavarjkZ"Vh; Lohd`r ok;qeaMyh; fLFkfr;ka viukbZ tk,a] mnkgj.k dsfy, eki ,oa rkSy] fo|qr ,oabysDVkWfud m|ksx ds ewy ekudksa dsekeys esa20lsa- vkSj 65 izfr'kr lkis{k vknzZrk_ vkSj vYdksgy ,oaisVksfy;e mRiknksa ds ekeys esa15lsa- (0-80-80-80-80-8 ,oa0-90-90-90-90-9 Hkh ns[ksa)A

3-1-23-1-23-1-23-1-23-1-2 fdlh vU; ok;qeaMyh; fLFkfr;ksaesaijh{k.k fd, tkus

ij ok;qeaMy dk iz;ksx okLro esa ijh{k.k fd, tkus vFkokekunaMksadk ifjdyu fd, tkus ds fy, gks] rkieku vkSj@vFkokvknzZrk vkSj@vFkok nkc ij ekunaM dh fuHkZjrk dk fu;e KkrgksA

3-2 ijh{k.k gsrq ifjos'kxr ok;qeaMyh; fLFkfr;ksa dh3-2 ijh{k.k gsrq ifjos'kxr ok;qeaMyh; fLFkfr;ksa dh3-2 ijh{k.k gsrq ifjos'kxr ok;qeaMyh; fLFkfr;ksa dh3-2 ijh{k.k gsrq ifjos'kxr ok;qeaMyh; fLFkfr;ksa dh3-2 ijh{k.k gsrq ifjos'kxr ok;qeaMyh; fLFkfr;ksa dhfHkUurkfHk UurkfHkUurkfHk UurkfHk Uurk tgka dgha rkieku ,oa lkisf{kd vknzZrk dhfHkUurk ds Hkhrj ekis tkus okys ekinaM HkkSfrd :i lsizHkkfor u gksaogka3-13-13-13-13-1 esa mfYyf[kr ekud ijh{k.k ok;qeaMyesa ijh{k.k djuk vko';d ughagSaA ,sls ekeyksa esafuEufyf[krfHkUurk ds Hkhrj ekiu fd;k tk,%

rkieku % 15ls- ls35lsa-lkis{k vknzZrk % 45 ls 75 izfr'kr

ok;qnkc % 860 ls 1 060 ,eckj

3-2-13-2-13-2-13-2-13-2-1 fo'ks"k ekeyksa esa mijksDr rkieku fHkUurk10lsa- ls40lsa- gks ldrh gSA

4 ekud ijh{k.k okrkoj.k ij NwVs a4 ekud ijh{k.k okrkoj.k ij NwVs a4 ekud ijh{k.k okrkoj.k ij NwVs a4 ekud ijh{k.k okrkoj.k ij NwVs a4 ekud ijh{k.k okrkoj.k ij NwVs a

4-1 rkieku ,oa vknzZrk4-1 rkieku ,oa vknzZrk4-1 rkieku ,oa vknzZrk4-1 rkieku ,oa vknzZrk4-1 rkieku ,oa vknzZrk NwV dh nks Jsf.k;kagksaxh] lkekU;,oa djhchA ijh{k.k d{k vFkok pSEcj esa fdlh Hkh fcanq ijlkekU; NwV2ls- rkieku ij vkSj lkis{k vknZzrk ij5

izfr'kr rFkk djhch NwV1ls- rkieku ij vkSj lkis{k vknzZrkij2 izfr'kr gksxhA

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3

vkbZ,l@IS 196 : 1966

NOTE Depending upon the sensitiveness of the particular

test to atmospheric variations either of the two tolerances may

be chosen. When the relevant specification requires a period of

conditioning or pre-conditioning, it is important to distinguish

between the overall limits of the temperatures within which it may

be carried out and the limits within which the temperature

should be maintained in order to maintain the specified relative

humidity limits, for example, the close temperature tolerance

of 1C will not in itself ensure the close relative humidity

requirement of 2 percent.

fVIi.kh ok;qeaMy fHkUurk ds ijh{k.k fo'ks"k dh laosnu'khyrk dsvkkkj ij nksuksa esa ls fdlh Hkh NwV dk p;u fd;k tk ldrk gSAlac fof'kf"V ds fy, vuqdwy vFkok iwoZ&vuqdwyu dh vko';drkgksus ij ftl rkieku ds Hkhrj og fd;k tkuk gS mldh ldy

lhek rFkk ml lhek ds chp varj djuk vko';d gS ftlesarkieku j[kk tkuk gS rkfd fufnZ"V lkis{k vknzZrk cukbZ j[kh tk lds]mnkgj.k ds fy,] 1ls- dh djhch rkieku NwV vius vki esa2izfr'kr dh djhch lkis{k vknZzrk dh vis{kk dks lqfuf'pr ughadjrh gSA

vuqcak dvuqcak dvuqcak dvuqcak dvuqcak d

([kaM0-10)lfefr xBulfefr xBulfefr xBulfefr xBulfefr xBu

bathfu;fjax ekud fo"k; lfefr] ihthMh 20

laxBu izfrfukku

j{kk ea=kky; (vkj ,.M Mh) MkW,l- Hkxoure~ (v;{kv;{kv;{kv;{kv;{k)duZy ts- ih- ,aFkuh (MkW,l- Hkxoure~ dsfodYih)

n baLVhV~;w'ku vkWiQ bathfu;lZ (bafM;k)] dydkk Jh ih- vkj- vkgwtk

,lksfl,'ku vkWiQ bafM;u vkWVkseksckby eSU;wiQSDpjlZ] cacbZ Jh ,u- cky".k

iwfrZ,oa fuiVku egkfuns'kky; (m|ksx ,oa vkiwfrZea=kky;) Jh ,l- ,u- Ms

Mk;jsDVksjsV tujy vkWiQ vkWCtosZVksjht (ukxfjd mM~M;u ea=kky;)] fMIVh Mk;jsDVj tujy vkWiQ vkWCtosZVksjht (baLVwesaVl)

ubZfnYyhdsanzh; oSKkfud midj.k laxBu (lh,lvkbZvkj)] paMhx

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4

vkbZ,l@IS 196 : 1966

ijh{k.k dh ok;qeaMyh; fLFkfr;ka milfefr] ihthMh 20 % 1

laxBu la ;kstd

us'kuy fiQftdy ysckWjVjh (lh,lvkbZvkj)] ubZfnYyh Jh isze izdk'k

izfrfukku

fjlpZ] fMtkbu ,aM LVSaMMZl vkxsZukbts'ku (jsy ea=kky;) Jh ,- ds- HkV~Vkpk;ZJh ds- osadVjekuh (oSdfYid)

Mk;jsDVksjsV tujy vkWiQ vkCtosZVksjhT+k (ukxfjd mM~M;u ea=kky;)] fMIVh Mk;jsDVj tujy vkWiQ vkCtosZVksjhT+k (baLVwesaV~l)ubZfnYyh Jh ,u- lh- kj (oSdfYid)

vkWfiQl vkWiQ n phiQ baLisDVj vkWiQ ekbUl (Je ,oajksT+kxkj ea=kky;)] Jh ,u- ih- ?kks"kkuckn Jh th- ,l- ekjokg (oSdfYid)

j{kk ea=kky; (lhlhvkj ,aM Mh) est xq:cD'k flagJh lh- ts- psfj;u (oSdfYid)

fganqLrku yhoj fyfeVsM] cacbZ MkW th- ,l- gV~VaxM+h

bafM;u lsaVy dkWVu desVh] cacbZ MkW vkj- ,y- ,u- v;axj

us'kuy esVkyftZdy ysckWjVjh (lh,lvkbZvkj)] te'ksniqj Jh ,- ds- ykfgjh

rduhdh fodkl ,oamRiknu egkfuns'kky; (ok;q)] j{kk ea=kky;] foax deka - Mh- ts- ykW;jubZfnYyh LdokMu yhMj ,l- ch- iqjkf.kd (oSdfYid)

dsanzh; lM+d vuqlakku laLFkku (lh,lvkbZvkj)] ubZfnYyh izks ,l- vkj- esgjk

us'kuy VSLV gkml] dydkk Jh ch- ds- eq[kthZ

vgenkckn VsDlVkby baMLVh fjlpZ ,lksfl,'ku] vgenkckn MkW Vh- jkkk".kuJh ds- lqczef.k;e (oSdfYid)

bVySCk izkbosV fyfeVsM] cacbZ Jh oh- ,u- 'kkg

okrkoj.kh; ijh{k.k ifr fo"k; lfefr] bZVhMhlh 26 Jh ds- ,u- frokjh

Hkkjrh; isVksfy;e laLFkku (lh,lvkbZvkj)] ubZfnYyh MkW ts- MCyw- fOgVdj

ANNEX A

(Clause 0.10)COMMITTEE COMPOSITION

Engineering Standards Sectional Committee , PGD 20

Organization Members

Ministry of Defence (R & D) DR S. BHAGAVANTAM (Chairman)

COL J. P. ANTHONY (Alternate to Dr S. Bhagavantam)

The Institution of Engineers (India), Calcutta SHRI P. R. AHUJA

Association of Indian Automobile Manufacturers, Bombay SHRI N. BALKRISHNA

Directorate General of Supplies & Disposals (Ministry of Industry & SHRI S. N. DE

Supply)

Directorate General of Observatories (Ministry of Civil Aviation), DEPUTY DIRECTOR GENERALOF OBSERVATORIES (INSTRUMENTS)New Delhi

Central Scientific Instruments Organization (CSIR), Chandigarh DR P. S. GILL

Research, Designs & Standards Organization (Ministry of Railways) SHRI J. C. KALRA

National Test House, Calcutta SHRI S. N. MUKHERJI

Indian Engineering Association, Calcutta SHRI S. NANDI

National Physical Laboratory (CSIR), New Delhi SHRI PREM PRAKASH

Indian Institute of Science, Bangalore PROF A. RAMACHANDRAN

Directorate General of Civil Aviation (Ministry of Civil Aviation), SHRI S. RAMAMRITHAM

New Delhi

In personal capacity (Regional Engineering College, PROF V. V. L. RAO

Warangal Kazipet P.O.)

Ministry of Defence (R & D) MAJ-GEN J. R. SAMSON

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vkbZ,l@IS 196 : 1966

Organization Members

Indian Institute of Technology, Bombay SHRI T. R. SARKARI

Engineering Association of India, Calcutta SHRI J. M. SINHA

Central Mechanical Engineering Research Institute (CSIR), Durgapur SHRI M. M. SURI

Director, ISI (Ex-officio Member) SHRI M. V. PATANKAR,Deputy Director (Mech Engg) (Secretary)

Atmospheric Conditions for Testing Subcommittee, PCD 20 : 1

Convener

National Physical Laboratory (CSIR), New Delhi SHRI PREM PRAKASH

Members

Research, Designs & Standards Organization (Ministry of Railways) SHRI A. K. BHATTACHARYYA

SHRI K.VENKATARAMANI (Alternate)

Directorate General of Observatories (Ministry of Civil Aviation), DEPUTY DIRECTOR GENERALOF OBSERVATORIES (INSTRUMENTS)

New Delhi SHRI N. C. DHAR (Alternate)

Office of the Chief Inspector of Mines (Ministry of Labour & Employment), SHRI N. P. GHOSH

Dhanbad SHRI G. S. MARWAHA (Alternate)

Ministry of Defence (CCR &D) MAJ GURBUXSINGH

SHRI C. J. CHERIYAN (Alternate)

Hindustan Lever Ltd, Bombay DR G. S. HATTIANGDI

Indian Central Cotton Committee, Bombay DR R. L. N. IYENGAR

National Metallurgical Laboratory (CSIR), Jamshedpur SHRI A. K. LAHIRI

Directorate of Technical Development & Production (Air), Ministry of WG CDR D. J. LAWYER

Defence, New Delhi SQN LDR S. B. PURANIK (Alternate)

Central Road Research Institute (CSIR), New Delhi PROF S. R. MEHRA

National Test House, Calcutta SHRI B. K. MUKHERJEE

Ahmedabad Textile Industrys Research Association, Ahmedabad DR T. RADHAKRISHNAN

SHRI K. SUBRAHMANYAM (Alternate)

Italab Private Ltd, Bombay SHRI V. N. SHAH

Environmental Testing Procedures Sectional Committee, ETDC 26 SHRI K. N. TIWARI

Indian Institute of Petroleum (CSIR), New Delhi DR J. W. WHITAKER

fuoZpu esa fookn dh fLFkfr esa bl ekud dk vaxzsT+kh ikB gh ekU; gksxkA

In case of dispute in interpretation, English version of this standard shall be authentic.

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