general technical requirements. general technical requirements of the Magnifier. Types, basic parameters. General technical requirements
INTERSTATE STANDARD
MAgnifying glasses TYPES, BASIC PARAMETERS. GENERAL TECHNICAL REQUIREMENTS
Official publication
IPC PUBLISHING HOUSE OF STANDARDS Moscow
INTERSTATE STANDARD MAgnifying glasses Types, basic parameters. General technical requirements
Types, basic parameters. General technical requirements
Magnifiers. Types, basic parameters.
General technical requirements
MKS 37.020 OKP 44 3580
Date of introduction 01/01/84
This standard applies to magnifiers for general and industrial use.
1. TYPES AND MAIN PARAMETERS
1.1. Depending on the values of the main parameters, the groups of loops indicated in the table are set. 1.
Note: The magnification of the magnifying glass when the pupil of the eye is located in the rear focus should be calculated using the formulas:
where 250 is the distance of best vision, mm;
/" - back focal length of the magnifying glass, mm.
Formula (1) is for magnifiers with a focal length of up to 150 mm, formula (2) is for magnifiers with a focal length of more than 150 mm.
Official publication Reproduction prohibited
1.2. Depending on the purpose, the types of magnifiers indicated in the table are installed. 2.
© Standards Publishing House, 1983 © IPK Standards Publishing House, 2003
GOST 25706-83 S. 2
|
Continuation of the table. 2 |
||||||||||||||||||||||||||||||
|
1.3. The designation of a magnifying glass must include the type designation, number of lenses, magnification and designation of this standard.
Examples of symbols:
single-lens textile magnifying glass with glass optics 4 x magnification:
LT-1-4 x GOST25706-83;
three-lens corrected measuring magnifier with plastic optics 10 x magnification:
LIP-3-10 x GOST25706-83
2. GENERAL TECHNICAL REQUIREMENTS
2.1. Magnifiers should be manufactured in accordance with the requirements of this standard and the specifications for magnifiers of a particular type.
2.2. Magnifier lenses must be made of optical glass in accordance with GOST 3514 or optical plastic with a protective coating.
2.3. The cleanliness of the lens surface must meet the requirements of GOST 11141; The cleanliness class should be selected depending on the diameters of the magnifier lenses in accordance with Table. 3.
(Changed edition, Amendment No. 1).
2.4. The image quality must be clear throughout the entire field of view and correspond to the sample approved in the prescribed manner.
2.5. Magnifier lenses must be firmly secured and must not rotate in the frames.
2.6. The surfaces of the frame and body of magnifiers should not have nicks, dents or other defects.
2.7. In folding magnifying glasses, the hinge joint must ensure that the magnifying glass and handle are fixed at any opening angle.
S. 3 GOST 25706-83
2.8. The design of grain magnifiers must ensure access of light to the object in question.
2.9. The shape, dimensions and markings of magnifiers must comply with the technical specifications for magnifiers of a particular type.
2.10. For magnifiers with optics made of plastic frames, the clamping rings for attaching the lenses must be made of plastic.
2.11. The magnifying glass body, made of metal, must have a durable anti-corrosion coating.
2.12. The following must be marked on the frame of the magnifying glass:
manufacturer's trademark;
magnification magnification.
2.13. Magnifier lenses made of polymer materials should not have gross casting defects. Under-pressing, sagging, yellowing of materials, as well as deposits on the working surfaces of the lens are not allowed.
2.14. During transportation, magnifiers must withstand exposure to ambient temperatures from minus 45 °C to plus 45 °C.
2.15. Magnifying glasses must be resistant to mechanical stress during transportation with an overload of 4g.
Imaging technology. GOST 25706-83 - Magnifiers. Types, basic parameters. General technical requirements. OKS: Imaging technology, Optical equipment. GOST standards. Magnifiers. Types, basic parameters. General technical.... class=text>
GOST 25706-83
Magnifiers. Types, basic parameters. General technical requirements
GOST 25706-83
Group P43
INTERSTATE STANDARD
Types, basic parameters. General technical requirements
Magnifiers. Types, basic parameters.
General technical requirements
ISS 37.020
OKP 44 3580
Date of introduction 1984-01-01
INFORMATION DATA
1. APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee on Standards dated 04/08/83 N 1684
2. INSTEAD GOST 7594-75; GOST 8307-72; GOST 8309-75; GOST 9461-74; GOST 10513-73; GOST 18504-73
3. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS
4. The validity period was lifted according to Protocol No. 3-93 of the Interstate Council for Standardization, Metrology and Certification (IUS 5-6-93)
5. EDITION (July 2003) with Amendment No. 1, approved in May 1988 (IUS 9-88)
This standard applies to magnifiers for general and industrial use.
1. TYPES AND MAIN PARAMETERS
1. TYPES AND MAIN PARAMETERS
1.1. Depending on the values of the main parameters, the groups of loops indicated in Table 1 are installed.
Table 1
Note. The magnification of the magnifying glass when the pupil of the eye is located in the rear focus should be calculated using the formulas:
where 250 is the distance of best vision, mm;
- back focal length of the magnifying glass, mm.
Formula (1) - for magnifiers with a focal length of up to 150 mm, formula (2) - for magnifiers with a focal length of more than 150 mm.
1.2. Depending on the purpose, the types of magnifiers listed in Table 2 are installed.
table 2
Purpose | Design | Magnifier group | Optical system |
|
For reading, for viewing details of drawings, photographic prints, small objects, etc. | Folding, with handle, tripod | Low, medium, high magnification | ||
LI (measuring) | For linear and angular measurements | In a frame with a diopter adjustment and a measuring scale | Medium magnification | Multilens corrected |
LZ (grain) | To view grain to determine its quality | Framed | Low magnification | Simple single lens |
Champions League (hourly) | For use in the watch and jewelry industry | Low and medium magnification | ||
LT (textile) | To determine the quality and density of fabric (number of threads per 1 cm) | In a folding frame | Simple single-lens, multi-lens corrected |
|
LC (to view the frame) | To view frames on film | In a frame with diopter adjustment and frame window | Simple single lens |
1.3. The designation of a magnifying glass must include the type designation, number of lenses, magnification and designation of this standard.
Examples of symbols:
single-lens textile magnifier with glass optics 4 magnifications:
LT-1-4GOST 25706-83;
three-lens corrected measuring magnifier with plastic optics 10 magnification:
LIP-3-10GOST 25706-83
2. GENERAL TECHNICAL REQUIREMENTS
2.1. Magnifiers should be manufactured in accordance with the requirements of this standard and the specifications for magnifiers of a particular type.
2.2. Magnifier lenses must be made of optical glass in accordance with GOST 3514 or optical plastic with a protective coating.
2.3. The cleanliness of the lens surface must comply with the requirements of GOST 11141; The cleanliness class should be selected depending on the diameters of the magnifier lenses in accordance with Table 3.
Table 3
(Changed edition, Amendment No. 1).
2.4. The image quality must be clear throughout the entire field of view and correspond to the sample approved in the prescribed manner.
2.5. Magnifier lenses must be firmly secured and must not rotate in the frames.
2.6. The surfaces of the frame and body of magnifiers should not have nicks, dents or other defects.
2.7. In folding magnifying glasses, the hinge joint must ensure that the magnifying glass and handle are fixed at any opening angle.
2.8. The design of grain magnifiers must ensure access of light to the object in question.
2.9. The shape, dimensions and markings of magnifiers must comply with the technical specifications for magnifiers of a particular type.
2.10. For magnifiers with optics made of plastic frames, the clamping rings for attaching the lenses must be made of plastic.
2.11. The magnifying glass body, made of metal, must have a durable anti-corrosion coating.
2.12. The following must be marked on the frame of the magnifying glass:
manufacturer's trademark;
magnification magnification.
2.13. Magnifier lenses made of polymer materials should not have gross casting defects. Under-pressing, sagging, yellowing of materials, as well as deposits on the working surfaces of the lens are not allowed.
2.14. During transportation, magnifiers must withstand exposure to ambient temperatures from minus 45 °C to plus 45 °C.
2.15. Magnifying glasses must be resistant to mechanical stress during transportation with an overload of 4g.
2.16. Magnifiers should be manufactured in climatic modification UHL category 4.2 according to GOST 15150.
2.17. The established full service life of magnifiers with glass optics is 10 years, with plastic optics - 4 years.
(Changed edition, Amendment No. 1).
4. The validity period was lifted according to Protocol No. 3-93 of the Interstate Council for Standardization, Metrology and Certification (IUS 5-6-93)
5. EDITION (July 2003) with Amendment No. 1, approved in May 1988 (IUS 9-88)
This standard applies to magnifiers for general and industrial use.
1. TYPES AND MAIN PARAMETERS
1. TYPES AND MAIN PARAMETERS
1.1. Depending on the values of the main parameters, the groups of loops indicated in Table 1 are installed.
Table 1
Group | Rating range |
|
increase | linear field of view, mm |
|
Low magnification | Up to 5 incl. | |
Medium magnification | St. 5 to 10 incl. | |
High magnification | ||
Note. The magnification of the magnifying glass when the pupil of the eye is located in the rear focus should be calculated using the formulas:
where 250 is the distance of best vision, mm;
- back focal length of the magnifying glass, mm.
Formula (1) - for magnifiers with a focal length of up to 150 mm, formula (2) - for magnifiers with a focal length of more than 150 mm.
1.2. Depending on the purpose, the types of magnifiers listed in Table 2 are installed.
table 2
Purpose | Design | Magnifier group | Optical system |
|
For reading, for viewing details of drawings, photographic prints, small objects, etc. | Folding, with handle, tripod | Low, medium, high magnification | ||
LI (measuring) | For linear and angular measurements | In a frame with a diopter adjustment and a measuring scale | Medium magnification | Multilens corrected |
LZ (grain) | To view grain to determine its quality | Framed | Low magnification | Simple single lens |
Champions League (hourly) | For use in the watch and jewelry industry | Low and medium magnification | ||
LT (textile) | To determine the quality and density of fabric (number of threads per 1 cm) | In a folding frame | Simple single-lens, multi-lens corrected |
|
LC (to view the frame) | To view frames on film | In a frame with diopter adjustment and frame window | Simple single lens |
1.3. The designation of a magnifying glass must include the type designation, number of lenses, magnification and designation of this standard.
Examples of symbols:
single-lens textile magnifier with glass optics 4 magnifications:
LT-1-4 GOST 25706-83 ;
three-lens corrected measuring magnifier with plastic optics 10 magnification:
LIP-3-10 GOST 25706-83
2. GENERAL TECHNICAL REQUIREMENTS
2.1. Magnifiers should be manufactured in accordance with the requirements of this standard and the specifications for magnifiers of a particular type.
2.2. Magnifier lenses must be made of optical glass in accordance with GOST 3514 or optical plastic with a protective coating.
2.3. The cleanliness of the lens surface must meet the requirements of GOST 11141; The cleanliness class should be selected depending on the diameters of the magnifier lenses in accordance with Table 3.
Table 3
Lens diameter, mm | ||
Magnifiers with glass optics | Magnifiers with polymer optics |
|
Up to 10 incl. | ||
St. 10 "50" | ||
" 50 " 80 " | ||
(Changed edition, Amendment No. 1).
2.4. The image quality must be clear throughout the entire field of view and correspond to the sample approved in the prescribed manner.
2.5. Magnifier lenses must be firmly secured and must not rotate in the frames.
2.6. The surfaces of the frame and body of magnifiers should not have nicks, dents or other defects.
2.7. In folding magnifying glasses, the hinge joint must ensure that the magnifying glass and handle are fixed at any opening angle.
2.8. The design of grain magnifiers must ensure access of light to the object in question.
2.9. The shape, dimensions and markings of magnifiers must comply with the technical specifications for magnifiers of a particular type.
2.10. For magnifiers with optics made of plastic frames, the clamping rings for attaching the lenses must be made of plastic.
2.11. The magnifying glass body, made of metal, must have a durable anti-corrosion coating.
2.12. The following must be marked on the frame of the magnifying glass:
manufacturer's trademark;
magnification magnification.
2.13. Magnifier lenses made of polymer materials should not have gross casting defects. Under-pressing, sagging, yellowing of materials, as well as deposits on the working surfaces of the lens are not allowed.
2.14. During transportation, magnifiers must withstand exposure to ambient temperatures from minus 45 °C to plus 45 °C.
2.15. Magnifying glasses must be resistant to mechanical stress during transportation with an overload of 4g.
2.16. Magnifiers should be manufactured in climatic conditions UHL category 4.2 according to GOST 15150.
2.17. The established full service life of magnifiers with glass optics is 10 years, with plastic optics - 4 years.
(Changed edition, Amendment No. 1).
The text of the document is verified according to:
official publication
M.: IPK Standards Publishing House, 2003
Approvedand put into effect
Decree of the State Standard of the USSR
STATE STANDARD OF THE USSR UNION
TYPES, BASIC PARAMETERS.
GENERAL TECHNICAL REQUIREMENTS
Magnifiers.Types, basic parameters.
General technical requirements
GOST 25706-83
Group P43
OKP 44 3580
Validity
INFORMATION DATA
1. Performers: V.I. Belikov (topic leader); G.I. Belyakova; I.P. Kamalova.
2. Approved and put into effect by Resolution of the USSR State Committee for Standards dated 04/08/1983 N 1684.
3. The inspection period is 1992, the inspection frequency is 5 years.
4. Instead of GOST 7594-75; GOST 8307-72; GOST 8309-75; GOST 9461-74; GOST 10513-73; GOST 18504-73.
5. Reference regulatory and technical documents
──────────────────────────────────────────┬───────────────────────
──────────────────────────────────────────┼───────────────────────
GOST 3514-76│2.2
GOST 11141-84│2.3
GOST 15150-69│2.16
6. Reissue (September 1988) with Change No. 1, approved in May 1988 (IUS 9-88).
7. Verified in 1988. Validity period extended until 01/01/1994 (Resolution of the USSR State Committee for Standards dated 05/31/1988 N 1577).
This standard applies to magnifiers for general and industrial use.
1. TYPES AND MAIN PARAMETERS
1.1. Depending on the values of the main parameters, the groups of loops indicated in the table are set. 1.
Table 1
─────────────────────┬────────────────────────────────────────────
Group│Range of nominal values
├─────────────────────┬──────────────────────
│increase│linear field of view,
││mm
─────────────────────┴─────────────────────┴──────────────────────
Low magnificationD about 5 incl. .200 - 20
Medium magnificationC. 5 to 10 inclusive .40 - 10
High magnification "1010 - 4
Note. The magnification of the magnifying glass when the pupil of the eye is located in the rear focus should be calculated using the formulas
, (1)
, (2)
where 250 is the distance of best vision, mm;
f" - back focal length of the magnifying glass, mm.
Formula (1) - for magnifiers with a focal length of up to 150 mm, formula (2) - for magnifiers with a focal length of more than 150 mm.
(Changed edition, Rev. N 1).
1.2. Depending on the purpose, the types of magnifiers indicated in the table are installed. 2.
table 2
───────────────┬─────────────────┬──────────────┬──────────┬───────────────
Type│Purpose│Structural│Group│Optical
│ │performance│magnifying glass│system
LP│ For reading, for │ Folding,│ Small,│ Simple
│pictures,│tripod │large│multi-lens
│photo prints,││ increase│ corrected
│small objects │││
│etc.│││
───────────────┼─────────────────┼──────────────┼──────────┼───────────────
LI│ For linear and│ Framed,│ Medium│ Multi-lens
(measuring)│angular measurements│having│magnification│corrected
││diopter││
││movement and││
││measuring ││
││scale││
───────────────┼─────────────────┼──────────────┼──────────┼───────────────
LZ (grain) │ For viewing│In frame│ Small│ Simple
│grains with a purpose││ magnification│single lens
│defining it│││
│quality│││
───────────────┼─────────────────┤├──────────┤
LC (hourly)│ For application││ Small and │
│hourly and││average│
│jewelry ││increase│
│industry│││
LT│ To determine │ Folding││ Simple
(textile)│quality and│frame││single lens,
│fabric density│││multi-lens
│(number) of threads│││ corrected
│per 1 cm2 │││
───────────────┼─────────────────┼──────────────┤├───────────────
LK│ For viewing│ Framed,││ Simple
(to view │frames on│having││single-lens
frame)│film film│diopter ││
││movement and││
││frame window ││
1.3. The designation of a magnifying glass must include the type designation, number of lenses, magnification and designation of this standard.
An example of a symbol for a single-lens textile magnifier with magnifying glass optics:
The same, three-lens corrected measuring magnifier with plastic optics magnification:
2. GENERAL TECHNICAL REQUIREMENTS
2.1. Magnifiers should be manufactured in accordance with the requirements of this standard and the specifications for magnifiers of a particular type.
2.2. Magnifier lenses must be made of optical glass in accordance with GOST 3514-76 or optical plastic with a protective coating.
2.3. The cleanliness of the lens surface must comply with the requirements of GOST 11141-84; The cleanliness class should be selected depending on the diameters of the magnifier lenses in accordance with Table. 3.
Table 3
────────────────────┬──────────────────────────────────────────────────────
Lens diameter, mm │Cleanliness class according to GOST 11141-84
├──────────────────────────┬───────────────────────────
│ Magnifying glasses with glass optics │ Magnifying glasses with polymer optics
────────────────────┼──────────────────────────┼───────────────────────────
Up to 10 incl. │IV│V
St. 10 "50"│V│VI
"50 "80"│VI│VII
"80│VII│VIII
(Changed edition, Rev. N 1).
2.4. The image quality must be clear throughout the entire field of view and correspond to the sample approved in the prescribed manner.
2.5. Magnifier lenses must be firmly secured and not rotate in the frames.
2.6. The surfaces of the frame and body of magnifiers should not have nicks, dents or other defects.
2.7. In folding magnifying glasses, the hinge joint must ensure that the magnifying glass and handle are fixed at any opening angle.
2.8. The design of grain magnifiers must ensure access of light to the object in question.
2.9. The shape, dimensions and markings of magnifiers must comply with the technical specifications for magnifiers of a particular type.
2.10. For magnifiers with optics made of plastic frames, the clamping rings for attaching the lenses must be made of plastic.
2.11. The magnifying glass body, made of metal, must have a durable anti-corrosion coating.
2.12. The following must be marked on the frame of the magnifying glass:
manufacturer's trademark;
magnification magnification.
2.13. Magnifier lenses made of polymer materials should not have gross casting defects. Under-pressing, sagging, yellowing of the material, as well as deposits on the working surfaces of the lens are not allowed.
2.14. During transportation, magnifiers must withstand exposure to ambient temperatures from minus 45 to plus 45 °C.
2.15. Magnifiers must be resistant to mechanical stress during transportation with an overload of 4 g.
2.16. Magnifying glasses should be manufactured in climatic modification UHL category 4.2 according to GOST 15150-69.
2.17. The established full service life of magnifiers with glass optics is 10 years, with plastic optics - 4 years.
(Changed edition, Rev. N 1).
Interstate standard GOST 25706-83
"LOUPES. TYPES, BASIC PARAMETERS. GENERAL TECHNICAL REQUIREMENTS"
Magnifiers. Types, basic parameters. General technical requirements
With changes:
Instead of GOST 7594-75; GOST 8307-72;
GOST 8309-75; GOST 9461-74;
GOST 10513-73; GOST 18504-73
This standard applies to magnifiers for general and industrial use.
1. Types and main parameters
1.1. Depending on the values of the main parameters, the groups of loops indicated in the table are set. 1.
Table 1
┌─────────────────────┬─────────────────────────────────────────────────┐
│ Group │ Rating range │
│ ├─────────────────────┬───────────────────────────┤
│ │ increase │ linear field of view, mm │
│Low magnification │Up to 5(x) incl. │ 200 - 20 │
├─────────────────────┼─────────────────────┼───────────────────────────┤
│Medium magnification │St. 5 to 10(x) incl.│ 40 - 10 │
├─────────────────────┼─────────────────────┼───────────────────────────┤
│High magnification │ "10(x) │ 10 - 4 │
└─────────────────────┴─────────────────────┴───────────────────────────┘
Note. The magnification of the magnifying glass when the pupil of the eye is located in the rear focus should be calculated using the formulas:
, (2)
where 250 is the distance of best vision, mm;
f" - back focal length of the magnifying glass, mm.
Formula (1) - for magnifiers with a focal length of up to 150 mm, formula (2) - for magnifiers with a focal length of more than 150 mm.
1.2. Depending on the purpose, the types of magnifiers indicated in the table are installed. 2.
table 2
┌────────────────┬─────────────┬────────────┬────────────┬──────────────┐
│ Type │ Purpose │Construction-│Loupe group │ Optical │
│ │ │ new │ │ system │
│ │ │ performance │ │ │
│LP │For reading,│Folding, with│Small, │Simple │
│ │parts │tripod │large │multi-lens │
│ │drawings, │ │increasing │corrected- │
│ │photoprint- │ │ │naya │
│ │kov, small│ │ │ │
│ │objects and│ │ │ │
│ │etc. │ │ │ │
├────────────────┼─────────────┼────────────┼────────────┼──────────────┤
│LI │For linear│Framed,│Medium │Multi-lens │
│(measuring) │and angular│having │increase │corrected- │
│ │measurements │diopter │ │naya │
│ │ │movement and│ │ │
│ │ │meter- │ │ │
│ │ │ scale │ │ │
├────────────────┼─────────────┼────────────┼────────────┼──────────────┤
│LZ (grain) │For viewing│In frame │Small │Simple │
│ │grains for the purpose of│ │increasing │single lens │
│ │definitions │ │ │ │
│ │its quality │ │ │ │
├────────────────┼─────────────┤ ├────────────┤ │
│LC (hourly) │For │ │Small and│ │
│ │applications in│ │medium │ │
│ │hourly and│ │increase │ │
│ │jewelry │ │ │ │
│ │industry-│ │ │ │
│ │ti │ │ │ │
│LT (textile)│For │Folding│ │Simple │
│ │definitions │frame │ │single lens, │
│ │quality and│ │ │multi-lens │
│ │density │ │ │corrected- │
│ │fabrics (numbers│ │ │naya │
│ │threads per 1│ │ │ │
│ │cm2) │ │ │ │
├────────────────┼─────────────┼────────────┤ ├──────────────┤
│LK (for│For viewing│Framed,│ │Simple │
│viewing frame)│frames on│having │ │single lens │
│ │film film-│diopter │ │ │
│ │ke │movement and│ │ │
│ │ │personnel │ │ │
│ │ │window │ │ │
└────────────────┴─────────────┴────────────┴────────────┴──────────────┘
1.3. The designation of a magnifying glass must include the type designation, number of lenses, magnification and designation of this standard.
Examples of symbols:
single-lens textile magnifying glass with glass optics 4 x magnification:
LT-1-4 x GOST 25706-83;
three-lens corrected measuring magnifier with plastic optics 10 x magnification:
LIP-3-10 x GOST 25706-83
2. General technical requirements
2.1. Magnifiers should be manufactured in accordance with the requirements of this standard and the specifications for magnifiers of a particular type.
2.2. Magnifier lenses must be made of optical glass in accordance with GOST 3514 or optical plastic with a protective coating.
2.3. The cleanliness of the lens surface must comply with the requirements of GOST 11141; The cleanliness class should be selected depending on the diameters of the magnifier lenses in accordance with Table. 3.
Table 3
┌─────────────────┬─────────────────────────────────────────────────────┐
│Lens diameter, mm│ Cleanliness class according to GOST 11141 │
│ ├────────────────────────┬────────────────────────────┤
│ │Magnifying glasses with glass optics│Magnifying glasses with polymer optics │
│Up to 10 incl. │ IV │ V │
├─────────────────┼────────────────────────┼────────────────────────────┤
│St. 10" 50" │ V │ VI │
├─────────────────┼────────────────────────┼────────────────────────────┤
│ " 50 " 80 " │ VI │ VII │
├─────────────────┼────────────────────────┼────────────────────────────┤
│ "80 │ VII │ VIII │
└─────────────────┴────────────────────────┴────────────────────────────┘
(Changed edition, Amendment No. 1).
2.4. The image quality must be clear throughout the entire field of view and correspond to the sample approved in the prescribed manner.
2.5. Magnifier lenses must be firmly secured and must not rotate in the frames.
2.6. The surfaces of the frame and body of magnifiers should not have nicks, dents or other defects.
2.7. In folding magnifying glasses, the hinge joint must ensure that the magnifying glass and handle are fixed at any opening angle.
2.8. The design of grain magnifiers must ensure access of light to the object in question.
2.9. The shape, dimensions and markings of magnifiers must comply with the technical specifications for magnifiers of a particular type.
2.10. For magnifiers with optics made of plastic frames, the clamping rings for attaching the lenses must be made of plastic.
2.11. The magnifying glass body, made of metal, must have a durable anti-corrosion coating.
2.12. The following must be marked on the frame of the magnifying glass:
manufacturer's trademark;
magnification magnification.
2.13. Magnifier lenses made of polymer materials should not have gross casting defects. Under-pressing, sagging, yellowing of materials, as well as deposits on the working surfaces of the lens are not allowed.
2.14. During transportation, magnifiers must withstand exposure to ambient temperatures from minus 45°C to plus 45°C.
2.15. Magnifying glasses must be resistant to mechanical stress during transportation with an overload of 4g.
2.16. Magnifiers should be manufactured in climatic modification UHL category 4.2 according to GOST 15150.
2.17. The established full service life of magnifiers with glass optics is 10 years, with plastic optics - 4 years.
(Changed edition, Amendment No. 1).
Loading...
