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of this standard are mandatory, others are recommended.

The standard does not apply to tape measures developed and mastered by production before the introduction of this standard.

Tape measure with nominal length scale 5 m, carbon steel tape, class 3 accuracy, rectangular end at the pull end of the tape:

4 Technical requirements

4.1 Roulettes must comply with the requirements of this standard and design documentation for specific brands of roulettes, approved in the prescribed manner.

4.2 The permissible deviation of the actual length of the intervals of the tape measure scales from that marked on the scale at an ambient temperature of 20 ° C and the tension of the measuring tape with the working force should not exceed that indicated in Table 1.

Table 1

In millimeters

The working force of the tape tension during measurements:

- (100+-10) H - for roulettes 10 m long and more; - (10+-1) H "" " 1-5 m;

For roulettes with a load - the tension force is created by the load itself;

For tape measure with grooved tape - no tension.

For tape measures with a weight attached to the pull end of the measuring tape, the mass of the weight must be () kg.

4.3 At the request of the consumer, the manufacturer compares the ordered tape measures in accordance with regulatory documents * (2) .

Comparable roulettes are assigned a factory number. The verification certificate indicates the actual length (according to the standard) from zero to each meter stroke of the tape measure, rounded to tenths of a millimeter.

4.4 Tapes must be operational at ambient temperature from minus 40 to plus 50°C and relative humidity up to 98% at a temperature of plus 25°C, and tapes supplied to mines - at temperatures from minus 10 to plus 35°C and relative humidity up to 100% at a temperature of plus 35°С (UHL version, placement category 1 and 5 according to GOST 15150).

The criterion for the limit state (failure) is considered to be: breakage of the body and winding mechanism, jamming, tearing, erasing of strokes and numbers of the measuring tape over 10% of the total number of strokes and numbers.

4.6 The scale is applied to one or both edges of the tape. It is allowed to apply scales on both sides of the tape.

4.7 Tape scales are applied at millimeter, centimeter and meter intervals.

4.8 Roulettes are made with the beginning of the scale coinciding with the end of the measuring tape.

Roulettes with a pull ring 10 m or more in length are manufactured with the beginning of the scale at least 100 mm away from the end.

For tape measures with a load, the bottom end of the load serves as the beginning of the scale.

4.9 The starting point for digitization should be taken:

For centimeter intervals - the beginning of each meter;

For meter intervals - the beginning of the roulette scale.

For centimeter intervals, it is allowed to take the beginning of each decimeter as the origin, while the digitization of intervals that are multiples of 10 is indicated in the number of centimeter intervals from the beginning of each meter.

For centimeter intervals of roulette scales up to 5 m long inclusive, it is allowed to take the beginning of the roulette scale as the origin of reference without applying digital designations of meter intervals.

4.10 The stroke width should be selected from the range: 0.20; 0.30; 0.40 mm. Permissible deviation mm.

4.11 The strokes of different scale intervals should be of different lengths.

4.12 Digitizing scales

4.12.1 Each centimeter and meter intervals must have digital designations of the total number of intervals from the origin; figures indicating meter intervals must be supplemented by the letter "m" (meter).

4.12.2 Numerical indications of centimeter intervals, multiples of ten, and meter intervals should be highlighted with an increase in font size or a color background.

4.12.3 Near the designations of centimeter intervals, a multiple of 10, put numbers indicating the number of full meters from the beginning of the scale.

4.13 Strokes and numbers should be even, distinct and perpendicular to the working edge of the tape. The deviation from perpendicularity for strokes should not exceed 30", for numbers - 3 °.

4.14 For numbers and inscriptions, fonts are used in accordance with GOST 26.020. On scales with printed strokes, it is allowed to carry out numbers and inscriptions in typographic font in accordance with GOST 3489.2.

4.15 Roulette scales should be made with printed or etched strokes and digitization.

4.16 The background of the roulette scale should be light, and the strokes and digits should be dark and of contrasting colors.

For carbon steel tape measures with etched strokes and digitization, a dark background is allowed, while the strokes and digitization are light.

4.17 Roulettes must have a device for fixing the measuring tape in any working position or within one turn of the drum.

4.18 Roulettes must have a tape winder. Roulettes up to 5 m in length must have a device for automatic tape winding. It is allowed, in agreement with the consumer, to produce roulettes without automatic winding of the tape.

It is forbidden to use the automatic winding device for roulettes with a load.

4.19 When unwinding and winding the measuring tape, there should be no distortions and jamming.

4.20 Cases of tape measures should ensure the safety of the measuring tape in the wound form when falling from a height of 1.5 m.

4.21 The design of the body must protect the measuring tape from breakage or the appearance of residual deformations after it has been tensioned for measurements.

4.22 The design of the closed case of a tape measure 10 m or more in length should ensure the possibility of periodic cleaning of the internal cavity.

4.23 Measuring tapes of roulettes are made flat. For tape measures up to 5 m long, inclusive, tapes with a rectangular end and with a holder are allowed to be made convex (grooved).

4.24 For the manufacture of measuring tapes, tape measures are used

a) stainless steel bands:

Cold-rolled from corrosion-resistant steel grade Kh18G14AN4 (EP-197), heat-treated, polished according to regulatory documents * (3) ;

Cold-rolled from corrosion-resistant and heat-resistant steel 12X17G9AN4 hard-worked or highly hard-worked, increased accuracy, group 1, surface class A according to GOST 4986;

b) carbon steel tapes:

Cold-rolled heat-treated steel, strength group 2P, normal manufacturing accuracy, light-hardened, polished, with machined edges, with a crescent not more than 2 mm per 3 m in accordance with GOST 21996.

It is allowed to use steels of other grades with physical-chemical, physical-mechanical and technological characteristics that are not inferior to the corresponding characteristics of steels of these grades.

4.25 The width and thickness of the tape is selected in accordance with table 2.

table 2

In millimeters

4.26 Tape tapes made of carbon steel must have a protective anti-corrosion coating: lacquer, enamel or polymer.

A combination of the above is allowed.

Applicable protective coatings tape measures, including cargo, must comply with GOST 9.005, GOST 9.032, GOST 9.301, GOST 9.303, GOST 9.401, GOST 23852.

4.27 Roulettes in a package must withstand the following external influences:

Sinusoidal vibration with an acceleration of 49 (5 g) in the frequency range of 20-80 Hz;.

Multiple shocks with acceleration 147 (15 g) with a shock pulse duration of 5 ms;

Single shocks with acceleration 294 (30 g) with a shock pulse duration of 3 ms;

Climatic factors according to storage conditions 5 according to GOST 15150.

4.28 Completeness

4.28.1 At the request of the consumer, tape measures 10 m or more in length must be equipped with a dynamometer that provides working tension with the force specified in 4.2.

4.29 Marking of tape measures must be clear and remain throughout the entire service life. The place and method of marking are indicated in the drawings.

4.30 On the body of each tape measure must be applied:

Conventional designation of roulette;

Mark of approval for the type of tape measure as a means of measurement according to regulatory documents * (4) ;

Serial number (for compared tape measures);

Year and month of issue;

The stamp of the technical control service.

4.31 On the measuring tape of each tape measure at the exhaust end is applied:

Roulette length in meters;

Mass of 1 m measuring tape in grams;

Coefficient of linear expansion of the tape material (for roulettes with a length of 10 m or more);

The mark of faith.

4.32 The weight attached to the pull end of the measuring tape must be marked with:

Trademark of the manufacturer or its name;

Weight of cargo in kilograms.

4.33 On the transport container, in addition to marking in accordance with GOST 14192, the following must be applied:

The name of the packaged products and its symbol;

Quantity of packed products;

Name of the manufacturer.

4.34 Before packing the tape measure, it is necessary to thoroughly clean and apply temporary anti-corrosion protection in accordance with GOST 9.014.

4.35 Roulettes in an open case must be wrapped in waterproof packaging paper and individually packaged.

4.36 When grouped, the tape measures should be tightly packed in a container lined inside with moisture-proof paper.

Group packaging must have a packing list, which indicates:

Name of the manufacturer and its address;

Conventional designation of roulettes;

The number of packed roulettes;

Date of manufacture of rolls.

5 Acceptance rules

5.1 To check the compliance of tape measures with the requirements of this standard and design documentation for tape measures of specific brands, the following is carried out: tests for approval of the type of measuring instrument, acceptance and periodic tests, verification, tests to confirm compliance with the approved type.

5.2 Tests for approval of the type of measuring instrument and for confirmation of compliance with the approved type are carried out in accordance with regulatory documents * (4) .

5.3 Acceptance tests for compliance with the requirements of 3.1-3.4, 4.2, 4.3, 4.6-4.19, 4.23-4.26, 4.28-4.36 are carried out using statistical sampling control. Control plans are established in the methods developed in accordance with regulatory documents * (5) and approved in the prescribed manner. Tests are carried out (organized) by the technical control service of the manufacturer.

5.4 After passing acceptance tests, tape measures must be verified in accordance with regulatory documents * (6) and, if required by the customer, comparation in accordance with the requirements of 4.3.

5.5 Periodic tests are carried out at least once a year in full scope of the requirements of this standard and design documentation for tape measures of specific brands.

Test tapes with a length of 10 m or more of one accuracy class, differing only in the length of the scale, are carried out on tape measures of the greatest length, and the test results are extended to the entire standard size range.

The results of periodic tests are considered positive if all samples meet all the requirements being tested.

5.5.2 If a non-compliance of the samples (sample) with the requirement being checked is found, the tests are not stopped and carried out in full. Further, repeated tests are carried out on a double number of samples selected by the technical control service from among those that have passed acceptance tests, according to the points of nonconformity.

The results of repeated tests are considered positive if all samples meet all the requirements being tested. The results of the retests are final.

6 Test methods

All measuring instruments used must be verified in accordance with regulatory documents * (7) , and testing equipment must be certified in accordance with GOST 24555 * (8) .

6.5 Compliance with the requirements of 4.26 is checked according to GOST 9.032, GOST 9.302, GOST 9.401, GOST 9.407, the type of coating is checked according to the design documentation. During periodic tests, the condition of the coatings is checked after each climatic and mechanical test.

6.7 Compliance with the requirements of 4.20 is checked by dropping the tape measure without applying additional acceleration from a height of 1.5 m onto a hard surface base at least 5 times.

After testing, the measuring tape should not have nicks, cracks, dents, damage to coatings, jamming of the tape when the tape is pulled out three times to its full length and wound. There should be no damage on the case that prevents further use of tape measures.

6.8 Compliance with the requirements of 4.21 is checked by stretching the measuring tape three times with the force of 4.2.

There should be no dents, residual deformations on the tape, there should not be a separation (break) of the measuring tape.

6.9 Compliance

INTERSTATE STANDARD

Specifications

Official edition

INTERSTATE COUNCIL FOR STANDARDIZATION, METROLOGY AND CERTIFICATION

Foreword

1 DEVELOPED by the State Enterprise "Research Institute of Mining Geomechanics and Mine Surveying" (VNIMI) and the Interstate Technical Committee for Standardization MTK 296 "Optics and Optical Instruments"

INTRODUCED by Gosstandart of Russia

2 ADOPTED by the Interstate Council for Standardization, Metrology and Certification (Minutes No. 13 of May 28, 1998)

State name	Name of the national standardization body
The Republic of Azerbaijan	Azgosstandart
Republic of Armenia	Armstate standard
Republic of Belarus	State Standard of Belarus
The Republic of Kazakhstan	State Standard of the Republic of Kazakhstan
Kyrgyz Republic	Kyrgyzstandart
The Republic of Moldova	Moldovastandard
the Russian Federation	Gosstandart of Russia
The Republic of Tajikistan	T adjikgosstandart
Turkmenistan	Main State Inspectorate of Turkmenistan
The Republic of Uzbekistan	Uzgosstandart
	State Standard of Ukraine

3 Decree of the State Committee Russian Federation on standardization and metrology dated July 27, 1999 No. 220-st, the interstate standard GOST 7502-98 was put into effect directly as the state standard of the Russian Federation from July 1, 2000.

4 INSTEAD OF GOST 7502-89

5 REVISION. November 2006

This standard cannot be fully or partially reproduced, replicated and distributed as an official publication on the territory of the Russian Federation without permission federal agency for technical regulation and metrology

1 area of use............................................... .........one

3 Main parameters and dimensions .................................................. ..2

4 Specifications .................................................................. ......2

5 Rules for acceptance ............................................... ...........5

6 Test methods.................................................................... ..........6

7 Transport and storage............................................................... ..7

8 Instructions for use............................................................... .....7

9 Manufacturer's Warranty............................................................... .......eight

Appendix A Bibliography .................................................................. .eight

INTERSTATE STANDARD

METAL MEASURING ROULTIES

Specifications

Measuring metal tapes.

Introduction date 2000-07-01

1 area of use

Safety requirements for weighted tapes are set out in 4.18.

Requirements 3.4, 4.1-4.4, 4.7-4.10, 4.12, 4.13, 4.18, 4.19, 4.26, 4.28-4.33, 6.1, 6.2, 8.1, 8.4, 8.6, sections 5, 9 of this standard are mandatory, others are recommended.

The standard does not apply to tape measures developed and mastered by production before the introduction of this standard.

GOST 9.005-72 Unified system of protection against corrosion and aging. Metals, alloys, metallic and non-metallic inorganic coatings. Permissible and impermissible contacts with metals and non-metals

GOST 9.014-78 Unified system of protection against corrosion and aging. Temporary anticorrosive protection of products. General requirements

GOST 9.032-74 Unified system of protection against corrosion and aging. Paint coatings. Groups, technical requirements and designations

GOST 9.301-86 Unified system of protection against corrosion and aging. Metallic and non-metallic inorganic coatings. General requirements

GOST 9.302-88 Unified system of protection against corrosion and aging. Metallic and non-metallic inorganic coatings. Control methods

GOST 9.303-84 Unified system of protection against corrosion and aging. Metallic and non-metallic inorganic coatings. General requirements for selection.

GOST 9.401-91 Unified system of protection against corrosion and aging. Paint coatings. General requirements and accelerated test methods for resistance to climatic factors

GOST 9.407-84 Unified system of protection against corrosion and aging. Paint coatings. Assessment method appearance

GOST 26.020-80 Fonts for measuring instruments and automation. Styles and basic sizes

GOST 27.410-87 Reliability in engineering. Methods for monitoring reliability indicators and plans for control tests for reliability

GOST 3489.2-71 Typographic fonts. Typeface Journal chopped (for alphabets in Russian and Latin graphic bases). Appointment. Picture. Font line. Capacity

GOST 4986-79 Cold-rolled strip of corrosion-resistant and heat-resistant steel. Specifications

GOST 14192-96 Marking of goods Official edition

GOST 15150-69 Machinery, instruments and other technical products. Versions for different climatic regions. Categories, conditions of operation, storage and transportation in terms of the impact of environmental climatic factors

GOST 21996-76 Cold-rolled heat-treated steel strip. Specifications

GOST 23852-79 Paint coatings. General requirements for the selection of decorative properties

GOST 24297-87 Input control products. Key points

GOST 24555-81 1 * System of state testing of products. The procedure for certification of test equipment. Key points

3 Main parameters and dimensions

3.1 Roulettes should be manufactured with nominal length scales of 1, 2, 3, 5, 10, 20, 30, 50, 100 m.

At the request of the consumer, tape measures are allowed to be manufactured with scales of a different length.

3.2 Roulettes should be made with stainless steel bands (symbol - H) or carbon steel (symbol - Y).

3.3 The pull-out ends of the roulettes should be made:

With a ring (in the symbol - the letter "K");

With cargo (in the symbol - the letter "G"),

Roulettes up to 5 m inclusive are allowed to be manufactured with an exhaust end in the form of:

Rectangular end (in the symbol - the letter "P");

With a holder for fixing on the object to be measured (in the symbol - the letter "D").

Examples of symbols:

Tape measure with nominal length scale 30 m, stainless steel tape, class 2 accuracy, ring at the pull end of the tape:

Р30Н2К GOST 7502-98

Tape measure with nominal length scale 5 m, carbon steel tape, class 3 accuracy, rectangular end at the pull end of the tape:

R5UZP GOST 7502-98

4 Technical requirements

4.1 Roulettes must comply with the requirements of this standard and design documentation for specific brands of roulettes, approved in the prescribed manner.

Table 1

In millimeters

Note - L - the number of full and incomplete meters in the segment.

The working force of the tape tension during measurements:

- (100+10) H - for roulettes 10 m long and more;

- (10+1) H » » 1-5 m;

For roulettes with a load - the tension force is created by the load itself;

For tape measure with grooved tape - no tension.

For tape measures with a weight attached to the pull end of the measuring tape, the mass of the weight must be (2 + 0.1) kg.

4.3 At the request of the consumer, the manufacturer compares the ordered tape measures in accordance with regulatory documents 1).

4.4 Tapes must be operational at ambient temperature from minus 40 to plus 50 °C and relative humidity up to 98% at a temperature of plus 25 °C, and tapes supplied to mines - at temperatures from minus 10 to plus 35 °C and relative humidity up to 100% at a temperature of plus 35 °C (UHL version, placement category 1 and 5 according to GOST 15150).

The limit state criterion (failure) is considered to be: breakage of the body and winding mechanism, jamming, tearing, erasing of strokes and numbers of the measuring tape over 10% of the total number of strokes and numbers.

4.6 The scale is applied to one or both edges of the tape. It is allowed to apply scales on both sides of the tape.

4.7 Tape scales are applied at millimeter, centimeter and meter intervals.

4.8 Roulettes are made with the beginning of the scale coinciding with the end of the measuring tape.

Roulettes with a pull ring 10 m or more in length are manufactured with the beginning of the scale removed

not less than 100 mm from the end.

For tape measures with a load, the bottom end of the load serves as the beginning of the scale.

4.9 The starting point for digitization should be taken:

For centimeter intervals - the beginning of each meter;

For meter intervals - the beginning of the roulette scale.

4.10 The stroke width should be selected from the range: 0.20; 0.30; 0.40 mm. Permissible deviation +0.05 mm.