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GB/T 2985-2008 English PDF (GBT2985-2008)

GB/T 2985-2008 English PDF (GBT2985-2008)

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GB/T 2985-2008: Biological microscope

This Standard specifies the classification, basic parameters, requirements, test methods, inspection rules, marks, packaging, storage and transportation of biological microscope products. This Standard applies to various types of biological microscopes, observed in visible light, with mechanical tube length of 160 mm or infinite. This Standard applies to various types of biological microscopes that adopt photography and video technology to perform the image viewing and processing.
GB/T 2985-2008
GB
ICS 37.020
N 32
NATIONAL STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
Replacing GB/T 2985-1999
Biological microscope
???????????????
ISSUED ON. JULY 28, 2008
IMPLEMENTED ON. FEBRUARY 01, 2009
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the PEOPLE Republic of China;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Classification and basic parameters ... 6
4 Requirements ... 7
5 Test methods ... 13
6 Inspection rules ... 26
7 Marking, packaging, transportation and storage ... 27
Foreword
This Standard replaces GB/T 2985-1999 Biological Microscope.
Main differences between this Standard and GB/T 2985-1999 are.
?€? Add performance requirements of photography and video system. And provide the corresponding test methods.
?€? Electrical Safety Performance Requirements are developed according to the relevant requirements of GB 4793.1-2007 Safety Requirements For Electrical Equipment For Measurement, Control, And Laboratory Use - Part 1. General Requirements. The test methods are also specified correspondingly.
?€? The requirements to four technical indicators - "objectives aberration correction and clear vision", "requirements for condenser", "revolving nosepiece positioning error" and "fine tuning mechanism backlash" in the previous version are changed from ?€?reference to other relevant standards?€? to ?€?specific indicator requirements?€?. ?€? The mechanical tube length of universal microscope was modified to 160 mm or ???. ?€? The fit dimension of eyepieces and objectives tube of the universal microscope is modified to ??23.2 ???????????? .
?€? The magnification tolerance of objectives and eyepieces of microscope is modified to ?? 5%.
?€? There is no specific provisions for models of Test Tool SY-1 type bacterial inspection slide, and SY-2 type blood cell inspection slide. That is, delete SY-1 type and SY-2 type.
?€? Modify the Test Tool 600 lines/mm grid grating to 600 lines/mm grating. ?€? Delete the sampling plan of type inspection in inspection rules.
This Standard was proposed by China Machinery Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee (SAC/TC 103) on Optics and Photonics of Standardization Administration of China. Drafting organizations if this Standard. University of Shanghai Science and Technology, Ningbo Yongxin Optics Co., Ltd., Ningbo Teaching Instrument Co., Ltd., Ningbo Huaguang Precision Instrument Co., Ltd., Wuzhou Oka Optical Instrument Co., Ltd., Ningbo Sunny Instruments Co., Ltd., Guangzhou Liss Optical Instrument Co., Ltd., Nanjing Jiangnan Novel Optics Co., Ltd., Motic China Group Co., Ltd., and Phenix Optics Co., Ltd. Participating organization of this Standard. Chongqing Photoelectric Instrument Co., Ltd. The main drafters of this Standard. Huang Weijia, Hu Yu, Mao Lei, Wang Guorui, Xu Liming, Zhang Jinghua, Shen Xiaojiang, Li Migao, Li Xi, Xiao Qian, and Wu Guotong. The previous versions replaced by this Standard are as follows.
?€? GB 2985-1982, GB 2985-1991, GB/T 2985-1999.
Biological microscope
1 Scope
This Standard specifies the classification, basic parameters, requirements, test methods, inspection rules, marks, packaging, storage and transportation of biological microscope products.
This Standard applies to various types of biological microscopes, observed in visible light, with mechanical tube length of 160 mm or infinite.
This Standard applies to various types of biological microscopes (hereinafter referred to as the microscope) that adopt photography and video technology to perform the image viewing and processing.
2 Normative references
The articles contained in the following documents have become part of this Standard when they are quoted herein. For the dated documents so quoted, all the modifications (excluding corrections) or revisions made thereafter shall not be applicable to this Standard. For the undated documents so quoted, the latest editions shall be applicable to this Standard.
GB/T 2609 Microscopes - Objectives
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1. Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection (GB/T 2828.1-2003, IDT ISO 2859-1.1999)
GB/T 9246 Microscopes - Oculars (eyepieces)
GB/T 9247 Microscopes - Condensers
GB/T 15464 General-purpose specification for the packaging of instrumentation products
GB/T 22055.1 Microscopes - Screw threads for objectives and related nosepieces - Part 1. Screw thread type RMS (4/5in??1/36in) (GB/T 22055.1-2008, IDT ISO 8038- 1.1997)
GB/T 22056 Microscopes - Marking of objectives and eyepieces (GB/T 22056-2008, MOD ISO 8578.1997)
GB/T 22057.1 Microscopes - Imaging distances related to mechanical reference planes c) Laboratory microscope. Not more than 0.004 mm;
d) Research microscope. Not more than 0.002 mm.
4.11 The allowable difference of magnification of microscope objectives shall not exceed ?? 5%.
4.12 The allowable difference of magnification of microscope eyepieces shall not exceed ?? 5%.
4.13 For the microscope with tilting eyepieces sleeve, when the eyepieces sleeve rotates for 360??, the center displacement of the image on the eyepieces focal plane shall not be more than 0.6mm.
4.14 The optical axis of the lighting system and observation system shall be consistent; the lighting in the field shall be uniform, without the phenomenon of one light side and one dark side or light barring. When the condenser rises to the highest position, the top of the condenser shall be below the surface of the stage from 0.03mm to 0.4mm. 4.15 The dark field condenser shall be evenly illuminated. When there is no specimen placed on the stage, the dry type dark field condenser's field shall be basically dark; background of immersion type dark field condenser's field shall be relatively dark; specimen under observation shall be clear and sufficiently bright.
4.16 There shall be reliable sealing measures for immersion bright field condenser and immersion dark field condenser.
4.17 Microscope binocular system performance
4.17.1 The difference of the magnification of two systems on the left and right sides of the binocular microscope shall comply with the following requirements.
a) When the field angle of the eyepieces does not exceed 50??, it is not more than 2.0%. b) When the field angle of eyepieces exceed to 50??, it is not more than 1.5%. 4.17.2 The spectrum color of two systems on the left and right sides of the binocular microscope shall be basically same. The difference of the light and dark shall not be more than 18%.
4.17.3 The azimuth difference of the field image plane shall not more than 40?€? of the two systems on the left and right sides of the binocular microscope.
4.17.4 Within the scope of 55mm - 75mm of the binocular pupil distance, the center deviation of the left and right field shall comply with the following requirements. a) Up and down. 0.2mm???
b) Right and left external sides. 0.2mm???
c) Right and left internal sides. 0.4mm.
4.17.5 Outgoing beam coming from the left and right of the binoculars sleeve shall be in the parallel condition. The measurement shall be conducted at any position within the scope of the pupil distance of 55-75mm. And the permissible deviation of parallel shall comply with the following requirements.
a) Divergence in the horizontal direction shall not be more than 60?€?;
b) Convergence in the horizontal direction shall not be more than 30?€?;
c) Intersection in the vertical direction shall not be more than 30?€?.
4.17.6 When the two systems on the left and right of the binoculars sleeve is in zero visibility, the high-low difference shall not be more than 1.5mm between end faces of two eyepieces sleeves.
4.18 Microscope photography and video system performance
4.18.1 The image observed by the eyepieces shall be synchronous with that observed on the display screen. And the object space focusing volume shall not exceed ?? 0.05mm. 4.18.2 Cleaning scope of the photography, video field shall comply with the following requirements.
a) Universal microscope. Not less than 45%;
b) Laboratory microscope. Not less than 60%;
c) Research microscope. Not less than 75%.
4.18.3 The image center of the display screen field shall be basically consistent with that in the eyepieces field. And the maximum center offset shall not exceed one fifth of the diagonal of the display screen field.
4.18.4 The image orientation observed on the display screen shall be basically consistent with that observed by the eyepieces.
4.18.5 The field within the display screen shall be clean; with uniform brightness; and without shadows, spots, streak and various reflected light spot affecting the observation or flare phenomenon.
4.19 Electrical safety performance of the microscope
4.19.1 For microscope with electrical equipment, test voltage is maintained for 5s when it rises to the specified values in Table, without breakdown and arcing (AC and DC tests are 5.11.2 Test procedure
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