Key words: metal measuring tapes, technical conditions, classes, main parameters, technical requirements, acceptance rules, test methods. Metal measuring tapes GOST metal measuring tapes technical specifications

GOST 7502-98

Group P53

INTERSTATE STANDARD

METAL MEASURING ROULETTES

Specifications

Measuring metal tapes. Specifications

ISS 17.040.30
OKP 44 3356

Date of introduction 2000-07-01

Preface

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 (Protocol No. 13 of May 28, 1998)

Voted to accept:


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	Gosstandart of the Republic of Kazakhstan
Kyrgyz Republic	Kyrgyzstandard
The Republic of Moldova	Moldovastandard
Russian Federation	Gosstandart of Russia
The Republic of Tajikistan	Tajikgosstandart
Turkmenistan	Main State Inspectorate of Turkmenistan
The Republic of Uzbekistan	Uzgosstandart
	State Standard of Ukraine

3 By Decree of the State Committee of the Russian Federation for Standardization and Metrology dated July 27, 1999 N 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 GOST 7502-89

5 REVISION. November 2006

1 area of use

This standard applies to metal measuring tapes of the 2nd and 3rd accuracy classes (hereinafter referred to as tape measures), intended for measuring linear dimensions by direct comparison with the scale.

Safety requirements for weighted tape measures 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 put into production before the entry into force of this standard.

2 Normative references

This standard uses references to the following standards:

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

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

GOST 9.032-74 Unified system of protection against corrosion and aging. Paint and varnish 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 and varnish coatings. General requirements and methods of accelerated testing for resistance to climatic factors

GOST 9.407-84 * Unified system of protection against corrosion and aging. Paint and varnish coatings. Evaluation method appearance
________________
GOST R 9.414-2012

GOST 26.020-80 Fonts for measuring and automation instruments. Styles and main dimensions

GOST 27.410-87 * Reliability in technology. Methods for monitoring reliability indicators and plans for control tests for reliability
________________
* The document is not valid on the territory of the Russian Federation. GOST R 27.403-2009 is valid, hereinafter in the text. - Database manufacturer's note.

GOST 3489.2-71 Typographic fonts. Journal typeface, chopped (for alphabets on Russian and Latin graphic bases). Appointment. Drawing. Font line. Capacity

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

GOST 14192-96 Marking of goods

GOST 15150-69 Machines, instruments and other technical products. Versions for different climatic regions. Categories, operating, storage and transportation conditions regarding the impact of environmental climatic factors

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

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

GOST 24297-87 * Incoming product inspection. Basic provisions
________________
* The document is not valid on the territory of the Russian Federation. GOST 24297-2013 is valid, hereinafter in the text. - Database manufacturer's note.

GOST 24555-81 System of state testing of products. Procedure for certification of testing equipment. Basic provisions
______________
GOST R 8.568-97 is in force on the territory of the Russian Federation.

3 Main parameters and dimensions

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

At the customer's request, tape measures can be manufactured with scales of a different length.

3.2 Roulettes should be made with stainless steel tapes (symbol - N) or carbon steel(in the symbol - U).

3.3 Exhaust ends of tape measures should be made:

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

- with a load (in the symbol - the letter "G").

Tape measures up to 5 m inclusive can 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").

3.4 Symbol tape measure must include: the letter “P” - “roulette”, the nominal length of the scale, the material of the tape, the accuracy class, the design of the pull-out end of the tape and the designation of this standard.

Examples of symbols:

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

R30N2K GOST 7502-98

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

R5U3P GOST 7502-98

4 Technical requirements

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

4.2 The permissible deviation of the actual length of the tape measure scale intervals 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 be no more than that indicated in Table 1.

Table 1

In millimeters


Interval name	Permissible deviation of actual length, no more, for accuracy class

Millimeter
Centimeter
decimeter
Scale segment 1 m or more		±
Note - - the number of full and partial meters in a segment.

Working tension force of the tape during measurements:

- (100±10) N - for tape measures 10 m long or more;

- (10±1) N " " " 1-5 m;

- for tape measures with a load - the tension force is created by the load itself;

- for tape measures with grooved tape - without tension.

For tape measures with a weight attached to the pull-out end of the measuring tape, the weight of the weight should 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.
__________________
MI 1780.

Comparable tape measures are assigned a serial 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 Roulettes must be operable at ambient temperatures 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 categories 1 and 5 according to GOST 15150).

4.5 The full average lifespan for tape measures with stainless steel tapes is 2000 cycles, for tape measures with carbon steel tapes - 1500 cycles (the cycle includes: pulling the tape to its full length, tensioning with operating force, counting, winding the tape).

The criterion for the limiting state (failure) is considered to be: breakage of the housing and winding mechanism, jamming, rupture, erasure of lines and numbers of the measuring tape over 10% of the total number of lines 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 Tape measures are made with the beginning of the scale coinciding with the end of the measuring tape.

Tape measures with a pull ring 10 m or more in length are manufactured with the beginning of the scale removed from the end by at least 100 mm.

For weighted tape measures, the beginning of the scale is the bottom end of the weight.

4.9 The following should be taken as the starting point for digitization:

- for centimeter intervals - the beginning of each meter;

- for meter intervals - the beginning of the tape measure.

For centimeter intervals, it is allowed to take the beginning of each decimeter as the starting point, 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 starting point without applying digital markings for meter intervals.

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

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

4.12 Digitization of scales

4.12.1 Each centimeter and meter intervals must have digital indications of the full number of intervals from the beginning of the count; numbers indicating meter intervals must be supplemented by the letter "m" (meter).

4.12.2 Numerical designations for centimeter intervals, multiples of ten, and meter intervals must be highlighted by increasing the font size or having a colored background.

4.12.3 Near the designations of centimeter intervals divisible by 10, numbers are written indicating the number of full meters from the beginning of the scale.

4.13 Strokes and numbers must be smooth, 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 Fonts in accordance with GOST 26.020 are used for numbers and inscriptions. On scales with printed strokes, it is allowed to write numbers and inscriptions in typographic font in accordance with GOST 3489.2.

4.15 Tape 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 numbers should be dark and in contrasting colors.

For tape measures with carbon steel tapes with etched strokes and numbers, a dark background is allowed, but the strokes and numbers are allowed to be light.

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

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

Do not use an automatic winding device for weighted tape measures.

4.19 When unwinding and winding the measuring tape there should be no distortions or jams.

4.20 The casings of tape measures must ensure the safety of the wound measuring tape when dropped from a height of 1.5 m.

4.21 The design of the housing must protect the measuring tape from breaking or the appearance of residual deformations after it is tensioned for measurements.

4.22 The design of the closed casing of a tape measure with a length of 10 m or more must ensure the possibility of periodic cleaning of the internal cavity.

4.23 Measuring tapes for tape measures are made flat. For tape measures up to 5 m in length, tapes with a rectangular end and with a holder can be made convex (grooved).

4.24 For the manufacture of measuring tapes, roulettes are used

a) stainless steel strips:

- cold-rolled from corrosion-resistant steel grade X18G14AN4 (EP-197), heat-treated, polished regulatory documents;
_________________
On the territory of the Russian Federation - according to TU 14-1-425*.

* Specifications mentioned here and further in the text are the author’s development. See the link for more information. - Database manufacturer's note.

- cold-rolled from corrosion-resistant and heat-resistant steel 12Kh17G9AN4, cold-worked or highly cold-worked, increased accuracy, group 1, surface class A according to GOST 4986;

b) carbon steel strips:

- cold-rolled, heat-treated steel, strength group 2P, normal manufacturing accuracy, light-hardened, polished, with machined edges, with a crescent shape of no more than 2 mm per 3 m according to 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 the specified grades.

4.25 The width and thickness of the tape are selected in accordance with Table 2.

table 2

In millimeters


Parameter name	Meaning
Tape width
Tape thickness
Note - For tape measures up to 5 m long, sold through retail chains, it is allowed to use tapes 6 mm wide

4.26 Carbon steel tape measures must have a protective anti-corrosion coating: varnish, enamel or polymer.

A combination of the coatings listed 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 Packed tapes must withstand the following external influences:

- sinusoidal vibration with acceleration 49 m/s (5 g) in the frequency range 20-80 Hz;

- multiple impacts with an acceleration of 147 m/s (15 g) with a shock pulse duration of 5 ms;

- single impacts with an acceleration of 294 m/s (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 with a length of 10 m or more must be equipped with a dynamometer that provides operating tension with the force specified in 4.2.

4.28.2 Each delivered batch of tape measures must have a document (certificate or passport) confirming its compliance with the requirements of this standard, and for weight tapes, an additional instruction manual. The documents must bear the mark of approval of the type of measuring instrument in accordance with regulatory documents.
_______________
On the territory of the Russian Federation - in accordance with PR 50.2.009 *.

* The document is not valid on the territory of the Russian Federation. Lost force on the basis of order of the Ministry of Industry and Trade of Russia dated November 30, 2009 N 1081. The procedure for testing standard samples or measuring instruments for the purpose of type approval, the Procedure for approving the type of standard samples or the type of measuring instruments, the Procedure for issuing certificates of approval of the type of standard samples or the type of measuring instruments, establishing and changing the validity period of these certificates and the interval between verifications of measuring instruments are in force , Requirements for approval marks of the type of standard samples or the type of measuring instruments and the order of their application, hereinafter in the text. - Database manufacturer's note.

4.28.3 Comparative tape measures must have a verification certificate indicating the data in 4.3.

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

4.30 The following must be marked on the body of each tape measure:

- symbol of roulette;

- sign of approval of the type of tape measure as a measuring instrument according to regulatory documents;
_______________
On the territory of the Russian Federation - in accordance with PR 50.2.009.

- serial number (for comparable tape measures);

- year and month of issue;

- stamp of the technical control service.

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

- length of the tape measure in meters;

- mass of 1 m of measuring tape in grams;

- coefficient of linear expansion of the tape material (for tape measures 10 m or more in length);

- verification mark.

4.32 The following must be marked on the weight attached to the exhaust end of the measuring tape:

- trademark of the manufacturer or its name;

- mass of cargo in kilograms.

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

- name of the packaged product and its symbol;

- quantity of packaged products;

- name of the manufacturer.

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

4.35 Roulettes in an open case must be wrapped in moisture-proof packaging paper and individually packaged.

4.36 When packing in groups, the tapes must be tightly packed into containers lined with moisture-proof paper inside.

Group packaging must have a packing list indicating:

- name of the manufacturer and its address;

- symbol of roulettes;

- number of packed roulettes;

- date of manufacture of tape measures.

5 Acceptance rules

5.1 To check the compliance of tape measures with the requirements of this standard and the design documentation for tape measures of specific brands, the following are 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.
_________________
On the territory of the Russian Federation - in accordance with PR 50.2.009.

5.3 Acceptance tests for compliance with requirements 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 methods developed in accordance with regulatory documents and approved in the prescribed manner. The tests are carried out (organized) by the technical control service of the manufacturer.
_________________
On the territory of the Russian Federation - in accordance with RD 50-605.

5.4 After passing the acceptance tests, the tape measures must undergo verification in accordance with regulatory documents and, if required by the customer, comparison in accordance with the requirements of 4.3.
_________________
On the territory of the Russian Federation - in accordance with PR 50.2.006.

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

5.5.1 At least three samples of tape measures with and without load, lengths 3 (or 5), 10, 30 (or 50), 100 m of each material, are subjected to tests. anti-corrosion coating, accuracy class, selected by the technical control service from among those that have passed acceptance tests.

Tests of tape measures with a length of 10 m and more than 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 range of standard sizes.

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

5.5.2 If a discrepancy between the samples (sample) and the requirement being verified is detected, the tests are not stopped and are carried out in full. Next, 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 points of non-conformity.

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

6 Test methods

6.1 Testing of tape measures and making decisions based on their results are carried out in accordance with the requirements of this standard and design documentation for tape measures of specific brands. The test methods and means specified in this standard, except for the mandatory ones, can be replaced by others, provided that the required accuracy and measurement conditions are ensured, agreed upon in the prescribed manner.

All measuring instruments used must be verified in accordance with regulatory documents, and testing equipment must be certified in accordance with GOST 24555.
_________________
PR 50.2.006.

On the territory of the Russian Federation - in accordance with GOST R 8.568.

6.2 Checking the width and thickness of the measuring tape (4.25), strokes and numbers (4.10, 4.13), deviations in the length of intervals (4.2), weight and weight scale of tape measures with weight (4.2, 4.8) is carried out according to regulatory documents.
_________________
On the territory of the Russian Federation - according to other regulatory documents

6.6 Compliance of the font (4.14) is checked by comparison with a sample according to GOST 26.020 or GOST 3489.2.

6.7 Compliance with the requirements of 4.20 is checked by dropping a tape measure without adding 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, or jamming of the tape when the tape is pulled out to its full length three times and wound. There should be no damage to the body that would impede further use of the tape measures.

6.8 Compliance with the requirements of 4.21 is checked by tensioning the measuring tape three times with a force in accordance with 4.2.

There should be no dents or residual deformations on the tape, and there should be no separation (tear) of the measuring tape.

6.9 Compliance with the requirements of 4.17-4.19, 4.22 is checked by practical testing and three times stretching and winding the measuring tape over its entire length, checking fixation at any three points along the length of the tape.

6.10 Compliance with the requirements of 4.4 is checked in a thermal and moisture chamber by three times stretching and winding the measuring tape to its full length each time after 2 hours of exposure at the established limit values of temperature and humidity. Fluctuations in temperature and humidity in the chamber at steady values should not exceed ±3 °C and ±3%, respectively.

After testing, there should be no mechanical damage, jamming or distortion of the measuring tape, abrasion of scale elements and damage to coatings.

6.11 Compliance with the requirements of 4.27 in terms of mechanical effects is checked on test benches under specified loads.

The duration of vibration tests is 1 hour.

Impact resistance to repeated impacts is checked by applying at least 3000 blows at a frequency of 80-120 blows per minute for 30 minutes.

Impact resistance to single impacts is checked by applying at least 5 blows.

During testing, the container must be rigidly secured.

Resistance to climatic factors during transportation is checked by keeping the packaged tapes in a heat chamber for 2 hours at a temperature of first minus 50 °C, then plus 50 °C.

Tape measures are considered to have passed the tests if after testing there is no mechanical damage to the body, tape, tape jamming, damage to coatings or scale.

6.12 Reliability indicators according to 4.5 are checked according to reliability test programs developed in accordance with GOST 27.410 and approved in the prescribed manner.

7 Transportation and storage

7.1 Roulettes are transported in closed vehicles.

7.2 Transportation conditions in terms of exposure to climatic factors must comply with storage conditions 5 according to GOST 15150.

7.3 On airplanes, tape measures are transported in heated compartments.

7.4 Tapes should be stored on racks in heated storage facilities according to storage conditions 1 GOST 15150.

8 Operating instructions

8.1 When measuring the level of oil and petroleum products with weighted tape measures, the following precautions must be observed:

- lower and raise the load smoothly, slowly rotating the handle;

- do not allow the load to hit the necks of containers and other metal objects to avoid damage to the coating.

8.2 Before use, you should depreserve the tape measure and wipe the measuring tape dry with a soft rag.

8.3 After measurements, the tape measure must be wiped with a dry soft cloth when wound onto the drum.

8.4 Tapes must be subject to periodic verification in accordance with regulatory documents.
________________
On the territory of the Russian Federation - in accordance with PR 50.2.006.

8.5 To ensure the working tension required for measurements, it is recommended to use dynamometers.

8.6 When making measurements at temperatures other than 20 °C, it is necessary to introduce a correction for the temperature coefficient of linear expansion, calculated by the formula

where is the coefficient of linear expansion of the measuring tape material (for carbon steel = 1.2 10, for stainless steel = 2.0 10);

Length on a tape measure measured at temperature;

Air temperature during measurement, °C.

9 Manufacturer's warranties

9.1 The manufacturer guarantees that the tape measures comply with the requirements of this standard provided that the consumer complies with the operating, transportation and storage conditions.

9.2 Warranty period - 12 months from the date of sale through a retail network or from the date of receipt by the consumer.

APPENDIX A (for reference). Bibliography

APPENDIX A
(informative)


	"Methodological instructions. GSI. Standard tapes and metal measuring tapes. Verification rules." Approved by VNIIM named after D.I. Mendeleev
TU 14-1-425-72	"Cold-rolled strip made of corrosion-resistant steel grades Kh18G14AN4 (EP-197) and Kh18N9SMR (EP-414)." Approved by Glavmetiz of the USSR Ministry of Mining Metallurgy
	"Rules on metrology. GSI. Procedure for testing and type approval of measuring instruments." Accepted by Gosstandart of Russia
	"Guidelines for the application of standards for statistical acceptance control." Approved by the USSR State Standard
	"Rules for metrology. GSI. Verification of measuring instruments. Organization and procedure." Accepted by Gosstandart of Russia

Electronic text of the document
prepared by CJSC "Kodeks" and checked against:
official publication
M.: Standartinform, 2006

Description

Metal measuring tapes are manufactured in accordance with GOST 7502-98 in open and closed housings with stainless or carbon steel tapes. The extension ends of the tape measures are made with a ring or with a weight, or with a rectangular end or with a holder for fastening to the object to be measured.

The tape measure has a device for fixing the measuring tape in any working position. For tape measures equipped with a weight, the weight has a cylindrical shape. A scale is attached to the load; the beginning of the scale is the end of the load. The weight is made in the form of a steel core covered with a protective shell of aluminum alloy (a plastic tip is installed at the end of the weight). The shell prevents sparking from accidental impact on the tank walls. The load is secured to the measuring tape by means of a swivel joint.

The appearance of the roulettes is shown in Figure 1.

Software

absent.

Table 1 - Metrological characteristics

Table 2 - Main technical characteristics

Climatic conditions of use: Operating ambient temperature range, °C Relative air humidity, at a temperature of +25 °C, %	-40 to +50 0 to 98
Full average resource for roulettes:
With stainless steel belts, loops
With carbon steel belts, cycles
(the cycle includes: pulling the tape halfway
length, tension by working force, counting,
winding the tape).
Overall dimensions of the tape measure in the case:
width, mm, no more
length, mm, no more
thickness, mm, no more
Weight of tape measure with load, kg, no more
Weight of cargo, kg (for tape measures with weight)	from 0.25 to 2.00

Type approval mark

applied to the roulette passport using the typographic method.

Completeness

Verification

carried out according to the document MI 1780-87 “Methodological instructions. GSI. Standard tapes and metal measuring tapes. Verification method.

Basic means of verification:

1 Measuring tape of the 3rd category according to GOST R 8.763-2011;

2 Height gauge with a division value of 0.05 mm according to GOST 164-90;

3 Micrometer MK or MT according to GOST 6507-90;

4 Vernier calipers type TTTTs-TT according to GOST 166-89.

It is allowed to use similar verification means that ensure the determination of the metrological characteristics of the measuring instruments being verified with the required accuracy.

The verification mark is applied to the verification certificate or passport in the form of a sticker or an imprint of the verification stamp.

Information about measurement methods

are given in the operational document.

Regulations

GOST 7502-98 Metal measuring tapes. Technical specifications GOST R 8.763-2011 GSI. State verification scheme for measuring instruments of length in the range from 1 ■ 10-9 to 50 m and wavelengths in the range from 0.2 to 50 microns

GOST 7502-98

INTERSTATE STANDARD

MEASURING ROULETTE
METAL

Specifications

INTERSTATE COUNCIL
ON STANDARDIZATION, METROLOGY AND CERTIFICATION

Minsk

Preface

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 (Protocol No. 13-98 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	Kyrgyzstandard
The Republic of Moldova	Moldovastandard
Russian Federation	Gosstandart of Russia
The Republic of Tajikistan	Tajikgosstandart
Turkmenistan	Main State Inspectorate of Turkmenistan
The Republic of Uzbekistan	Uzgosstandart
	State Standard of Ukraine

3 By Decree of the State Committee of the Russian Federation for 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 GOST 7502-89

GOST 7502-98

INTERSTATE STANDARD

METAL MEASURING ROULETTES

Technicalconditions

Measuring metal tapes.
Specifications

Date of introduction 2000-07-01

1 area of use

Safety requirements for weighted tape measures are set out in.

4.28.3 Comparative tape measures must have a certificate of verification indicating data on .

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

4.30 The following must be marked on the body of each tape measure:

Roulette symbol;

Mark of approval of the type of tape measure as a measuring instrument according to regulatory documents 1) ;

Serial number (for comparable tape measures);

Year and month of issue;

Stamp of the technical control service.

1) On the territory of the Russian Federation - in accordance with PR 50.2.009.

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

The length of the tape measure in meters;

Weight of 1 m of measuring tape in grams;

Coefficient of linear expansion of the tape material (for tape measures 10 m or more in length);

Stamp of verification.

4.32 The following must be marked on the weight attached to the exhaust end of the measuring tape:

Trademark of the manufacturer or its name;

Weight of the load in kilograms.

5.3 Acceptance tests for compliance with the requirements , , , , , are carried out using statistical sampling control. Control plans are established in methods developed in accordance with regulatory documents 1) and approved in the prescribed manner. The tests are carried out (organized) by the technical control service of the manufacturer.

1) On the territory of the Russian Federation - in accordance with RD 50-605.

5.4 After passing the acceptance tests, the tape measures must undergo verification in accordance with regulatory documents 2) and, if required by the customer, comparison in accordance with the requirements.

2) On the territory of the Russian Federation - in accordance with PR 50.2.006.

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

5.5.1 At least three samples of tape measures with and without load, lengths 3 (or 5), 10, 30 (or 50), 100 m of each material, anti-corrosion coating, accuracy class, selected by the technical control service from among those that have been accepted, are subjected to testing - acceptance tests.

Tests of tape measures with a length of 10 m and more than 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 range of standard sizes.

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

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

6 Test methods

4) On the territory of the Russian Federation - in accordance with GOST R 8.568.

6.5 Compliance with the requirements 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 testing, the condition of coatings is checked after each climatic and mechanical test.

6.6 Compliance of the font () is checked by comparison with a sample in accordance with GOST 26.020 or GOST 3489.2.

6.7 Compliance with the requirements is checked by dropping a tape measure without adding 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, or jamming of the tape when the tape is pulled out to its full length three times and wound. There should be no damage to the body that would impede further use of the tape measures.

6.8 Compliance with the requirements is checked by tensioning the measuring tape three times with a force of .

There should be no dents or residual deformations on the tape, and there should be no separation (tear) of the measuring tape.

6.9 Compliance with the requirements is checked by practical testing and three times stretching and winding the measuring tape over its entire length, checking fixation at any three points along the length of the tape.

6.10 Compliance with the requirements is checked in a thermal and moisture chamber by three times stretching and winding the measuring tape to its full length each time after 2 hours of exposure at the established limit values of temperature and humidity. Fluctuations in temperature and humidity in the chamber at steady values should not exceed± 3 ° C and ± 3% respectively.

After testing, there should be no mechanical damage, jamming or distortion of the measuring tape, abrasion of scale elements and damage to coatings.

6.11 Compliance with the requirements regarding mechanical effects is checked on test benches under specified loads.

The duration of vibration tests is 1 hour.

Impact resistance to repeated impacts is checked by applying at least 3000 blows at a frequency of 80-120 blows per minute for 30 minutes.

Impact resistance to single impacts is checked by applying at least 5 blows.

During testing, the container must be rigidly secured.

Resistance to climatic factors during transportation is checked by keeping the packaged tapes in a heat chamber for 2 hours at a temperature initially minus 50° C, then plus 50 ° WITH.

Tape measures are considered to have passed the tests if after testing there is no mechanical damage to the body, tape, tape jamming, damage to coatings or scale.

6.12 Reliability indicators are checked according to reliability testing programs developed in accordance with GOST 27.410 and approved in the prescribed manner.

7 Transportation and storage

7.1 Roulettes are transported in closed vehicles.

7.2 Transportation conditions in terms of exposure to climatic factors must comply with storage conditions 5 according to GOST 15150.

7.3 On airplanes, tape measures are transported in heated compartments.

7.4 Tapes should be stored on racks in heated storage facilities according to storage conditions 1 GOST 15150.

8 Operating instructions

8.5 To ensure the working tension required for measurements, it is recommended to use dynamometers.

8.6 When measuring at temperatures other than 20° WITH , an amendment needs to be madeD tby the temperature coefficient of linear expansion, calculated by the formula

D t = aLAND(t - 20),

Where a- coefficient of linear expansion of the measuring tape material (for carbon steela = 1, 2× 10 -5 , for stainless steela = 2,0 × 10 -5 );

L I -tape measure length measured at temperaturet;

t - air temperature when measured,° WITH.

9 Manufacturer's warranties

9.1 The manufacturer guarantees that the tape measures comply with the requirements of this standard provided that the consumer complies with the operating, transportation and storage conditions.

9.2 Warranty period - 12 months. from the date of sale through a retail outlet or from the date of receipt by the consumer.

APPENDIX A
(informational)
Bibliography

MI 1780-87 “Methodological instructions. GSI. Standard tapes and metal measuring tapes. Verification rules." Approved by VNIIM im. DI. Mendeleev

TU 14-1-425-72 “Cold-rolled strip made of corrosion-resistant steel grades Kh18G14AN4 (EP-197) and Kh18N9SMR (EP-414).” Approved by Glavmetiz of the USSR Ministry of Mining Metallurgy

PR 50.2.009-94 “Rules for metrology. GSI. Procedure for testing and type approval of measuring instruments.” Accepted by Gosstandart of Russia

RD 50-605-86 “Guidelines for the application of standards for statistical acceptance control.” Approved by the USSR State Standard

PR 50.2.006-94 “Rules for metrology. GSI. Verification of measuring instruments. Organization and procedure." Accepted by Gosstandart of Russia

Key words: metal measuring tapes, specifications, classes, main parameters, technical requirements, acceptance rules, test methods

INTERSTATE STANDARD

Specifications

Official edition

INTERSTATE COUNCIL FOR STANDARDIZATION, METROLOGY AND CERTIFICATION

Preface

INTRODUCED by Gosstandart of Russia

2 ADOPTED by the Interstate Council for Standardization, Metrology and Certification (Protocol 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	Gosstandart of the Republic of Kazakhstan
Kyrgyz Republic	Kyrgyzstandard
The Republic of Moldova	Moldovastandard
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

4 INSTEAD 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 from the Federal Agency for Technical Regulation and Metrology

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

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

4 Technical requirements................................................... ......2

5 Acceptance rules......................................................... ...........5

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

7 Transportation and storage................................................................... ..7

8 Operating instructions.................................................................. .....7

9 Manufacturer's warranties................................................... .......8

Appendix A Bibliography................................................... .8

INTERSTATE STANDARD

METAL MEASURING ROULETTES

Specifications

Measuring metal tapes.

Date of introduction 2000-07-01

1 area of use

Safety requirements for weighted tape measures 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 put into production before the entry into force of this standard.

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

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

GOST 9.032-74 Unified system of protection against corrosion and aging. Paint and varnish 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 and varnish coatings. General requirements and methods of accelerated testing for resistance to climatic factors

GOST 9.407-84 Unified system of protection against corrosion and aging. Paint and varnish coatings. Appearance assessment method

GOST 26.020-80 Fonts for measuring and automation instruments. Styles and main dimensions

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

GOST 3489.2-71 Typographic fonts. Journal typeface, chopped (for alphabets on Russian and Latin graphic bases). Appointment. Drawing. Font line. Capacity

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

GOST 14192-96 Marking of cargo Official publication

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

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

GOST 24297-87 Incoming inspection of products. Basic provisions

GOST 24555-81 1 * System of state testing of products. Procedure for certification of testing equipment. Basic provisions

3 Main parameters and dimensions

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

At the customer's request, tape measures can be manufactured with scales of a different length.

3.2 Tapes should be made with tapes made of stainless steel (symbol - N) or carbon steel (symbol - U).

3.3 Exhaust ends of tape measures should be made:

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

With a load (in the symbol - the letter “G”),

Tape measures up to 5 m inclusive can 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”).

3.4 The symbol for tape measures must include: the letter “P” - “roulette”, the nominal length of the scale, the material of the tape, the accuracy class, the design of the pull-out end of the tape and the designation of this standard.

Examples of symbols:

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

R30N2K GOST 7502-98

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

R5UZP GOST 7502-98

4 Technical requirements

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

Table 1

In millimeters

Note - L is the number of full and partial meters in a segment.

Working tension force of the tape during measurements:

- (100+10) N - for tape measures 10 m long or more;

- (10+1) N » » » 1-5 m;

For tape measures with a load, the tension force is created by the load itself;

For tape measures with grooved tape - without tension.

For tape measures with a weight attached to the pull-out end of the measuring tape, the weight of the weight should 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).

Comparable tape measures are assigned a serial 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.

The limit state criterion (failure) is considered to be: breakage of the housing and winding mechanism, jamming, rupture, erasure of lines and numbers of the measuring tape over 10% of the total number of lines 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 Tape measures are made with the beginning of the scale coinciding with the end of the measuring tape.

Tape measures with a pull ring 10 m or more in length are made with the beginning of the scale removed

from the end not less than 100 mm.

For weighted tape measures, the beginning of the scale is the bottom end of the weight.

4.9 The following should be taken as the starting point for digitization:

For centimeter intervals - the beginning of each meter;

For meter intervals - the beginning of the tape measure.

For centimeter intervals, it is allowed to take the beginning of each decimeter as the starting point, 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 starting point without applying digital markings for meter intervals.

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

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

4.12 Digitization of scales

4.12.2 Numerical designations for centimeter intervals, multiples of ten, and meter intervals must be highlighted by increasing the font size or having a colored background.

4.12.3 Near the designations of centimeter intervals divisible by 10, numbers are written indicating the number of full meters from the beginning of the scale.

4.13 Strokes and numbers must be smooth, 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 in accordance with GOST 26.020 are used. On scales with printed strokes, it is allowed to write numbers and inscriptions in typographic font in accordance with GOST 3489.2.

4.15 Tape scales should be manufactured with printed or etched lines and digitized.

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

For tape measures with carbon steel tapes with etched strokes and numbers, a dark background is allowed, but the strokes and numbers are allowed to be light.

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

Do not use an automatic winding device for weighted tape measures.

4.19 When unwinding and winding the measuring tape there should be no distortions or jams.

4.20 The casings of tape measures must ensure the safety of the wound measuring tape when dropped from a height of 1.5 m.

4.21 The design of the housing must protect the measuring tape from breaking or the appearance of residual deformations after it is tensioned for measurements.

4.22 The design of the closed casing of a tape measure with a length of 10 m or more must ensure the possibility of periodic cleaning of the internal cavity.

4.23 Measuring tapes for tape measures are made flat. For tape measures up to 5 m in length, tapes with a rectangular end and with a holder can be made convex (grooved).

4.24 For the manufacture of measuring tapes, roulettes are used

a) stainless steel strips:

Cold-rolled from corrosion-resistant steel grade X18G14AN4 (EP-197), heat-treated, polished according to regulatory documents 1);

Cold-rolled from corrosion-resistant and heat-resistant steel 12Kh17G9AN4, cold-worked or highly cold-worked, increased accuracy, group 1, surface class A according to GOST 4986;

b) carbon steel strips:

Cold-rolled, heat-treated steel, strength group 2P, normal manufacturing accuracy, light-hardened, polished, with machined edges, with a crescent shape of no more than 2 mm by 3 m according to 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

4.26 Carbon steel tape measures must have a protective anti-corrosion coating: varnish, enamel or polymer.

A combination of the coatings listed above is allowed.

The protective coatings used for tape measures, including the load, must comply with GOST 9.005, GOST 9.032, GOST 9.301, GOST 9.303, GOST 9.401, GOST 23852.

4.27 Packed tapes must withstand the following external influences:

Sinusoidal vibration with acceleration 49 m/s 2 (5 g) in the frequency range 20-80 Hz;

Multiple impacts with an acceleration of 147 m/s 2 (15 g) with a shock pulse duration of 5 ms;

Single impacts with an acceleration of 294 m/s 2 (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 with a length of 10 m or more must be equipped with a dynamometer that provides operating tension with the force specified in 4.2.

4.28.3 Comparative tape measures must have a verification certificate indicating the data in 4.3.

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

4.30 The following must be marked on the body of each tape measure:

Roulette symbol;

Mark of approval of the type of tape measure as a measuring instrument according to regulatory documents 1);

Serial number (for comparable tape measures);

Year and month of issue;

Stamp of the technical control service.

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

The length of the tape measure in meters;

Weight of 1 m of measuring tape in grams;

Coefficient of linear expansion of the tape material (for tape measures 10 m or more in length);

Stamp of verification.

4.32 The following must be marked on the weight attached to the exhaust end of the measuring tape:

Trademark of the manufacturer or its name;

Weight of the load in kilograms.

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

Name of the packaged product and its symbol;

Quantity of packaged products;

Name of the manufacturer.

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

4.35 Roulettes in an open case must be wrapped in moisture-proof packaging paper and individually packaged.

4.36 When packing in groups, the tapes must be tightly packed into containers lined with moisture-proof paper inside.

Group packaging must have a packing list indicating:

Name of the manufacturer and its address;

Symbol for roulettes;

Number of packed roulettes;

Date of manufacture of tape measures.

5 Acceptance rules

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 1).

5.3 Acceptance tests for compliance with requirements 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. Plans

control is established in methods developed in accordance with regulatory documents 1) and approved in the prescribed manner. The tests are carried out (organized) by the technical control service of the manufacturer.

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

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

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

6 Test methods

All measuring instruments used must be verified in accordance with regulatory documents 3), and testing equipment must be certified in accordance with GOST 24555 4).

6.3 Compliance with requirements 3.1-3.4, 4.6-4.9, 4.11, 4.12, 4.15, 4.16, 4.23, 4.28-4.36 is checked by external inspection and comparison with design documentation. Dimensions are controlled by any measuring instruments that ensure control of the dimensions indicated on the drawings and their tolerances.

6.4 Compliance with the requirements of 4.24 is checked during incoming inspection in accordance with GOST 24297 using methods in accordance with GOST 4986, GOST 21996 and other regulatory documents^).

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 testing, the condition of coatings is checked after each climatic and mechanical test.

6.6 Compliance of the font (4.14) is checked by comparison with a sample in accordance with GOST 26.020 or GOST 3489.2.

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

11 On the territory of the Russian Federation - in accordance with RD 50-605.

21 On the territory of the Russian Federation - in accordance with PR 50.2.006.

31 On the territory of the Russian Federation - according to PR 50.2.006.

41 On the territory of the Russian Federation - according to GOST R 8.568.

51 On the territory of the Russian Federation - according to MI 1780 or according to verification methods developed in accordance with MI 1780 and approved in the prescribed manner.

61 On the territory of the Russian Federation - additionally according to TU 14-1-425.

6.8 Compliance with the requirements of 4.21 is checked by tensioning the measuring tape three times with a force in accordance with 4.2.

There should be no dents or residual deformations on the tape, and there should be no separation (tear) of the measuring tape.

After testing, there should be no mechanical damage, jamming or distortion of the measuring tape, abrasion of scale elements and damage to coatings.

6.11 Compliance with the requirements of 4.27 in terms of mechanical effects is checked on test benches under specified loads.

The duration of vibration tests is 1 hour.

Impact resistance to repeated impacts is checked by applying at least 3000 blows at a frequency of 80-120 blows per minute for 30 minutes.

Impact resistance to single impacts is checked by applying at least 5 blows.

During testing, the container must be rigidly secured.

Resistance to climatic factors during transportation is checked by keeping the packaged tapes in a heat chamber for 2 hours at a temperature of first minus 50 °C, then plus 50 °C.

Tape measures are considered to have passed the tests if after testing there is no mechanical damage to the body, tape, tape jamming, damage to coatings or scale.

6.12 Reliability indicators according to 4.5 are checked according to reliability test programs developed in accordance with GOST 27.410 and approved in the prescribed manner.

7 Transportation and storage

7.1 Roulettes are transported in closed vehicles.

7.2 Transportation conditions in terms of exposure to climatic factors must comply with storage conditions 5 according to GOST 15150.

7.3 On airplanes, tape measures are transported in heated compartments.

7.4 Tapes should be stored on racks in heated storage facilities according to storage conditions 1 GOST 15150.

8 Operating instructions

8.1 When measuring the level of oil and petroleum products with weighted tape measures, the following precautions must be observed:

Lower and raise the load smoothly, slowly rotating the handle;

Do not allow the load to hit the necks of containers or other metal objects to avoid damaging the coating.

8.2 Before use, you should depreserve the tape measure and wipe the measuring tape dry with a soft rag.

8.3 After measurements, the tape measure must be wiped with a dry soft cloth when wound onto the drum.

8.4 Tapes must be subject to periodic verification in accordance with regulatory documents 1).

8.5 To ensure the working tension required for measurements, it is recommended to use dynamometers.

8.6 When making measurements at temperatures other than 20 °C, it is necessary to introduce a correction A t for the temperature coefficient of linear expansion, calculated by the formula

A t = a L n (t - 20),

where a is the coefficient of linear expansion of the measuring tape material (for carbon steel a = 1.2-10 5, for stainless steel a = 2.0-10 -5);

b and - length on a tape measure, measured at temperature K t - air temperature during measurement, °C.

9 Manufacturer's warranties

9.1 The manufacturer guarantees that the tape measures comply with the requirements of this standard provided that the consumer complies with the operating, transportation and storage conditions.

9.2 Warranty period - 12 months from the date of sale through a retail network or from the date of receipt by the consumer.

APPENDIX A (for reference)

Bibliography

MI 1780-87 “Methodological instructions. ESI. Standard tapes and metal measuring tapes

nye. Verification rules." Approved by VNIIM im. DI. Mendeleev

TU 14-1-425-72 “Cold-rolled strip made of corrosion-resistant steel grades X18E14AN4 (EP-197) and

Kh18N9SMR (EP-414).” Approved by Elavmetiz of the USSR Ministry of Mining Metallurgy

PR 50.2.009-94 “Rules for metrology. ESI. Procedure for testing and type approval

measuring instruments". Accepted by Eosstandart of Russia

RD 50-605-86 “Guidelines for the application of standards for statistical acceptance

control". Approved by the USSR Eosstandart

PR 50.2.006-94 “Rules for metrology. ESI. Verification of measuring instruments. Organization and order

carrying out." Accepted by Eosstandart of Russia

UDC 531.711.15:006.354 MKS 17.040.30 P53 OKP 44 3356

Key words: metal measuring tapes, technical conditions, classes, main parameters, technical requirements, acceptance rules, test methods

Editor V.P. Kopysov Technical editor L.A. Guseva Proofreader S.I. Firsova Computer layout L.A. Circular

Signed for publication on October 25, 2006. Format 60x84*/8 - Offset paper. Eames headset. Offset printing. Uel. oven l. 1.40.

Uch.-ed. l. 1.15. Eirazh 88 copies. Zach. 770. From 3417.

FSUE "Standartinform", 123995 Moscow, Granatny per., 4. Typed in FSUE "Standartinform" on a PC.

Printed in the branch of FSUE "Standardinform" - type. “Moscow Printer”, 105062 Moscow, Lyalin lane, 6

Key words: metal measuring tapes, technical conditions, classes, main parameters, technical requirements, acceptance rules, test methods. Metal measuring tapes GOST metal measuring tapes technical specifications

1 area of ​​use

2 Normative references

3 Main parameters and dimensions

4 Technical requirements

5 Acceptance rules

6 Test methods

7 Transportation and storage

8 Operating instructions

9 Manufacturer's warranties

APPENDIX A (for reference). Bibliography

Description

Software

Type approval mark

Completeness

Verification

Information about measurement methods

Regulations

1 area of ​​use

6 Test methods

7 Transportation and storage

8 Operating instructions

9 Manufacturer's warranties

APPENDIX A (informational) Bibliography

Specifications

1 area of use

1 area of use

APPENDIX A
(informational)
Bibliography