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Roulettes measuring metal. Key words: metal measuring tapes, specifications, classes, main parameters, technical requirements, acceptance rules, test methods Metal measuring tape GOST 7502 98

16.11.2020

GOST 7502-98

INTERSTATE STANDARD

MEASURING ROPES
METAL

Specifications

INTERSTATE COUNCIL
ON STANDARDIZATION, METROLOGY AND CERTIFICATION

Minsk

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. 13-98 dated 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	Tajik State Standard
Turkmenistan	Main State Inspectorate of Turkmenistan
The Republic of Uzbekistan	Uzgosstandart
	State Standard of Ukraine

3 By the 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 OF GOST 7502-89

GOST 7502-98

INTERSTATE STANDARD

METAL MEASURING ROULTIES

Technicalconditions

Measuring metal tapes.
Specifications

Introduction date 2000-07-01

1 area of use

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

Safety requirements for tape measures with a load are set out in.

4.28.2 Each batch of tape measures supplied must have a document (certificate or passport) confirming its compliance with the requirements of this standard, and for tape measures with a load, an additional instruction manual. The documents must be marked with the type approval mark of the measuring instrument in accordance with the regulatory documents 1) .

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

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;

Approval mark for the type of tape measure as a means of measurement according to regulatory documents 1) ;

Serial number (for compared tape measures);

Year and month of issue;

The 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 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.

5.3 Acceptance tests for compliance with the requirements , , , , , are carried out using statistical sampling control. Control plans are established in the methods developed in accordance with regulatory documents 1) and approved in the prescribed manner. 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 acceptance tests, tape measures must be verified in accordance with regulatory documents 2) and, if required by the customer, comparation 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 scope of the requirements of this standard and design documentation for tape measures of specific brands.

5.5.1 Tests are subjected to 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 who passed acceptance - passing tests.

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

4) On the territory of the Russian Federation - according to 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 tests, the condition of the coatings is checked after each climatic and mechanical test.

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

6.7 Compliance is checked by dropping the tape measure without additional acceleration from a height of 1.5 m onto a hard surface 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 is checked by stretching the measuring tape three times with a force of .

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

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

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

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

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

The duration of vibration tests is 1 hour.

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

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

During testing, the container shall be rigidly fixed.

Resistance to climatic factors during transportation is checked by holding the packed rolls in a heat chamber for 2 hours at a temperature of minus 50° C, then plus 50 ° WITH.

The tape measure is considered to have passed the test if after the test there is no mechanical damage to the body, tape, tape jamming, damage to the coatings and the scale.

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

7 Transport 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 in accordance with GOST 15150.

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

7.4 Tape measure should be stored on racks in heated storages according to storage conditions 1 GOST 15150.

8 Instructions for use

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

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

D t = aLAnd(t - 20),

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

L and -tape measure length measured at temperaturet;

t - air temperature during measurement,° WITH.

9 Manufacturer's warranties

9.1 The manufacturer guarantees the conformity of tape measures to the requirements of this standard, provided that the consumer observes the conditions of operation, transportation and storage.

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

APPENDIX A
(informational)
Bibliography

MI 1780-87 “Guidelines. GSI. Exemplary tapes and metal measuring tapes. Verification Rules. Approved by VNIIM them. DI. Mendeleev

TU 14-1-425-72 "Cold-rolled strip 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 “Metrology Rules. GSI. The procedure for testing and approval of the type 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 State Standard of the USSR

PR 50.2.006-94 “Metrology Rules. GSI. Verification of measuring instruments. Organization and procedure”. Accepted by Gosstandart of Russia

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

set a bookmark

GOST 7502-98

Group P53

INTERSTATE STANDARD

METAL MEASURING ROULTIES

Specifications

Measuring metal tapes. Specifications

ISS 17.040.30
OKP 44 3356

Introduction date 2000-07-01

Foreword

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	Tajik State Standard
Turkmenistan	Main State Inspectorate of Turkmenistan
The Republic of Uzbekistan	Uzgosstandart
	State Standard of Ukraine

3 By the 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.

5 REVISION. November 2006

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.

2 Normative references

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 a load (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").

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

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:

R5U3PGOST 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.

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 specified 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 roulettes with grooved tape - without 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 the regulatory documents.

__________________

MI 1780.

Comparable roulettes 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 Tapes must be operable 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).

4.5 Total average life for stainless steel tape measure is 2000 cycles, carbon steel tape measure is 1500 cycles (cycle includes: pulling the tape to full length, pulling with operating force, counting, winding the tape).

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 ±0.05 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:

_________________

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

cold-rolled from corrosion-resistant and heat-resistant steel 12Kh17G9AN4 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.

, GOST 23852.

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

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.

4.28.2 Each batch of tape measures supplied must have a document (certificate or passport) confirming its compliance with the requirements of this standard, and for tape measures with a load, an additional instruction manual. The documents must bear the type approval mark of the measuring instrument in accordance with the 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. Has become invalid on the basis of the order of the Ministry of Industry and Trade of Russia dated November 30, 2009 N 1081. Valid , , , , hereinafter in the text. - Database manufacturer's note.

4.28.3 Comparable tape measures must have a verification certificate indicating the data according to 4.3.

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:

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

serial number (for compared 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 is applied:

tape measure length in meters;
weight of 1 m measuring tape in grams;
coefficient of linear expansion of the tape material (for roulettes 10 m long and more);
trust mark.

Group packaging must have a packing list, which indicates:

name of the manufacturer and his address;
conventional designation of roulettes;
the number of packed rolls;
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.

_________________

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

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 and approved in the prescribed manner. 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 acceptance tests, tape measures must be verified in accordance with regulatory documents and, if required by the customer, comparation 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 scope of the requirements of this standard and design documentation for tape measures of specific brands.

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

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

6.1 Tests of roulettes and making decisions based on their results are carried out in accordance with the requirements of this standard and design documentation for roulettes of specific brands. The methods and test tools specified in this standard, except for the mandatory ones, can be replaced by others, while ensuring the required accuracy and measurement conditions, agreed 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 - according to 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 the intervals (4.2), mass and scale of the load for tape measures with a load (4.2, 4.8) is carried out according to regulatory documents.

_________________

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

6.3 Compliance with the requirements of 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 the design documentation. Dimensions are controlled by any measuring instruments that provide control of the dimensions indicated on the drawings and their tolerances.

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.

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 with the requirements of 4.17-4.19, 4.22 is checked by practical testing and by pulling and winding the measuring tape three times over the 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 moisture chamber by pulling out and winding the measuring tape over its entire length three times, each time after 2 hours of exposure at established limit values of temperature and humidity. Fluctuations in temperature and humidity in the chamber at steady-state values should not exceed ± 3 ° C and ± 3%, respectively.

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

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

The duration of vibration tests is 1 hour.

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

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

8.4 Roulettes must be subject to periodic verification in accordance with regulatory documents.

________________

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

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

8.6 When measuring 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 material of the measuring tape (for carbon steel = 1.2 10, for stainless steel = 2.0 10

"Rules on metrology. GSI. The procedure for testing and approval of the type of measuring instruments". Accepted by Gosstandart of Russia

"Guidelines for the application of standards for statistical acceptance control". Approved by the State Standard of the USSR

"Rules on metrology. CSI. Verification of measuring instruments. Organization and procedure". Accepted by Gosstandart of Russia

Description

Metal measuring tapes are manufactured in accordance with GOST 7502-98 in an open and closed case with stainless or carbon steel tapes. The pull-out ends of the tapes are made with a ring or with a load or with a rectangular end or with a holder for fixing on 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 load, the load has a cylindrical shape. A scale is attached to the load, the beginning of the scale is the end of the load. The load is made in the form of a steel core covered with a protective shell made of aluminum alloy (a plastic tip is installed at the end of the load). The shell eliminates sparking in case of accidental impact on the walls of the tank. The fastening of the load on the measuring tape is made by means of a swivel joint.

The appearance of the roulettes is shown in Figure 1.

Software

is absent.

Table 1 - Metrological characteristics

Table 2 - Main technical characteristics

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

Type approval mark

is applied to the passport of roulettes by typographic method.

Completeness

Verification

carried out according to the document MI 1780-87 “Guidelines. GSI. Exemplary 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 division value of 0.05 mm according to GOST 164-90;

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

4 Caliper type TTTC-TT according to GOST 166-89.

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

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

Information about measurement methods

given in the operating document.

Regulations

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

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.

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) .

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).

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.

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

4.12.2 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 °.

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