GB/T 2985-2008Biological microscope (English PDF)

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 infinite.

- The fit dimension of eyepieces and objectives tube of the universal microscope is modified to phi23.2.

- 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.

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 (4/5inx1/36in) (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

4 Requirements

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.