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.

इंटरनेट मानक

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

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 15216 (2002): Balloons - Meteorological [PGD 21:Meteorological Instruments]

IS 15216:2002

Indian Standard

BALLOONS –- METEOROLOGICAL

1(2s 07.060

G BIS 2002

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHAD[JR SIHAH ZAFAR MARG

NEW DELHI 110002

Price Group 1

Meteorological Instruments Sectional Committee, BP21

FOREWORD

This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by theMeteorological Instruments Sectional Committee had been approved by the Basic and Production EngineeringDivision Council.

In the preparation of this standard, considerable assistance has been derived from the JSS 6660-09:1995 ‘Balloons,Meteorological’,

For the purpose of deciding whether a particular requirement of this standard is complied with, the finalvalue, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with

IS 2:1960 ‘Rules for rounding off numerical values ( revised)’. The number of significant places retained in therounded off value should be the same as that of the specified value in this standard.

IS 15216:2002

Indian Standard

BALLOONS — METEOROLOGICAL

1 SCOPE

This standard covers the general and functionalrequirements of Balloons — Meteorological used forvisual measurelnent of upper winds, sounding balloonsfor carrying transmitting equipment for collection ofupper air meteorological data and for determining theheights of the cloud bases,

2 DESCRIPTION

The balloons shall be spherical, expansible type andtheir chief requirement, apart from being able to reachsatisfactory heights, is that they should be capableof ascending at a constant rate very near to pre-determined value, which requires that they maintaina spherical shape even after expansion due to beingexposed to reducing atmospheric pressure throughouttheir ascent,

3 DIMENSIONS AND TOLERANCES

The dimensions and tolerances for different types ofballoons shall be as given in Table 1.

4 MATERIAL

4.1 The rubber used in the manufacture of ba)loons

shall be of finest quality and fi-ee from particle of foreignmatter and shall be used in the form of latex emulsionwhich should be suitably compounded with necessary

ingredients.

4.2 The colour shall be red/pink or white, as orderedand uniformly deep and fast.

5 WORKMANSHIP AND FINISH

The balloons shall be seamless and the balloontissue shall be of uniform thickness, free from pinholes and weak spots. It shall withstand highertemperature and humidity without significantdeterioration for at least two years. It shall be freefrom any obnoxious smell,

6 SAMPLING AND INSPECTION

6.1 A sample from a consignment shall consist of10 balloons. If the total number of balloons in aconsignment is 500 or less, then a sample shall consistof 5 balloons only. A sample shall be submitted toeither inflation test or flight test or both.

6.2 Each balloon of the sample shall be examinedcarefully to see whether it adheres to the tolerancelimits prescribed as r:gard to its mass, dimensions,

etc. The balloons shall then be inflated with air till itbursts, If only one balloon bursts before reachingthe prescribed minimum circumference as given inTable 1, the balloons shall be accepted for further tests.If more than two balloons burst before reaching theprescribed circumference, the entire consignment shall

be rejected. However, if two balloon burst pre-maturely,one more sample consisting of 10 ( or 5 ) balloons

shall be subjected to bursting test. In the second test,if none of the balloons bursts before reaching theminimum circumference, the consignment shall be

accepted for further tests but if one or more balloons

burst pre-maturely, the entire consignment shall berejected.

Table 1 Physical Characteristics of Balloons — Meteorological

( Clause 3 )

slNo.

Type/Size

Colour Mass

(g)

NeckLength(mm)

NeckDiameter

(mm)

UninflatedCircumfe-rence (cm)

MinimumBursting

Circumfe-rence (m)

MinimumBurstingHeight

(km)

(1)

i)

ii)

iii)

iv)

v)

vi)

(2)

15

27

32

70

150

300

(3)

Red/Pink

Red/Pink

Red/Pink

White/Pink

White

White

(4)

15*2

27*3

32+3

70+5

150+ 10

300+ 10

(5)

50+5

60+ 10

602! 10

80+ 10

80+ 10

80+ 10

(6)

38*2

38*2

38+2

45*5

55+5

60&5

(7)

55+5

65+6

65+6

100* 10

150+ 10

150+ 10

(8) (9)

200 3

250 6

250 6

500 12

750 16

800 16

1

IS 15216:2002

7 TESTS

7.1 Visual Test

The balloons shall be examined for the following visualdefects

a)

b)

c)

d)

e)

9

Particles of foreign matter in the rubber ofthe balloon,

Non-seamlesness of the balloon,

Non-uniform thickness of the balloon tissue,

Pin holes and weak spots,

Any obnoxious smell, and

Non-uniformity and fading of the colour ofballoon,

7.2 Functional Tests

7.2.1 Flight Test

A sample consisting of 10 ( or 5 ) balloons ( see 7.1 )shall also be tested in actual flight under variousweather conditions normally encountered. The

balloons shall reach a minimum bursting heightprescribed in Table 1. If all the balloons except one

reach the prescribed height before bursting, theconsignment shall be accepted for further tests. Ifmore than one balloon burst before reaching theprescribed height, the entire consignment shall berejected.

7.2.2 Ageing Test

After the balloons pass the tests prescribed in 6.2

and 7.2.1, they shall be further subjected to ageingtest. For this purpose, a sample consisting of fiveballoons shall be kept in an oven at a temperatureof 70°C for two days and shall then be subjected toinflation tests prescribed in 6.2 and shall pass thesame. The lot shall be accepted only if they pass allthe tests.

7.3 If a consignment of balloons is rejected, the wordREJECTED shall be stamped on each balloon before

their return to the manufacturer.

8 MARKING

8.1 Each balloon shall be legibly and indeliblymarked with the following:

a)

b)

c)

d)

Nomenclature,

Manufacturer’s code,

Year of manufacture, and

Type of balloon.

8.2 BIS Certification Marking

The product may also be marked with the StandardMark.

8.2.1 The use of the Standard Mark is governed bythe provisions of the Bureau ofIndian Standards Act,

1986 and the Rules and Regulations made thereunder.The details of conditions under which the Iicencefor the use of the Standard Mark may be granted tomanufacturers or producers may be obtained fromthe Bureau of Indian Standards.

9 PACKAGING

9.1 Each balloon shall be thoroughly dried anddusted with dry chalk powder which shall effectivelyprevent cohesion of the rubber. Each balloon shallbe packed separately in sealed bag.

9.2 Each bag containing balloon shall further becovered with waterproof material and packed in a

suitable carton.

9.3 Each bag and carton shall be marked with thefollowing:

a) Manufacturer’s code, name and trade-mark;

b) Nomenclature;

c) Year of manufacture;

d) Type of balloon; and

e) Quantity.

!<~:;ii:i~ ihe copy triyi]tof all its publications. No part oftbesepublicati ons maybe reproduced in any form without

~h~ pr:~~r-[}erti\issioi] in writing of BIS. This does not preclude the free use, irr the course of implementing the,i[aIId:ird,of necessnrv details, such as syinbols and sizes. type or grade designations. Enquiries relating toc,~:yri:ht he a~~ress&J to the Director (Publications), BIS.

Review Of Indian Standards

~ilnelldmcnts are issued to standards as the need arises on the basis ofcornments. Standards are also reviewed

periudical!y: a standard along with amendments is reaffirmed when such review indicates that no charges areneeded: if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards

should :~scertain that they are in possession of the latest amendments or edition by referring to the latest issueof “131SCatalcl,g.ae’ and ‘Standards : ?vfoothly Additions’.

‘Mi> ]nclian Standard has been developed from Doc : No. L3P21 (0131 ),

Amendments Issued Since Publication

i\lnf;Ild NO. Date of Issue Text Affected

BUREAU OF INDIAN STANDARDS

}leadquarters:

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