National 210 - User Manual

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National Optical & Scientific Instruments Inc.

6508 Tri-County Parkway

Schertz, Texas 78154

Phone (210) 590-9010 Fax (210) 590-1104

INSTRUCTIONS FOR

MODEL 210 (Corded)

MODEL 210-RLED (Rechargeable Cordless)

COMPOUND MICROSCOPE

Copyright © 1/14/2013

National Optical & Scientific Instrument Inc.

Table of Contents

Questions and Answers

J
Joshua GonzalezJul 27, 2025
Why does the light fail to operate on my National Microscope?
- L
  Laura MooreJul 27, 2025
  If the light on your National Microscope isn't working, there are several things you can check: * Make sure the batteries are charged; if they're fully discharged, recharge them. * Ensure the rheostat control is turned up enough to increase the light intensity. * Verify the light switch is in the 'on' position. * The LED bulb might be burned out and require replacement. * Also, check if the fuse is blown and replace it if necessary.
J
Jonathan RandolphAug 2, 2025
How to improve poor resolution (image not sharp) on National 210 Microscope?
- S
  schroederalisonAug 2, 2025
  If you're experiencing poor resolution with your National Microscope, resulting in a blurry image, consider these solutions: * The objective lenses might be dirty, so try cleaning them. * Similarly, the eyepiece lens could be dirty and require cleaning. * Too much light can also cause this issue; try adjusting the diaphragm.
C
Chelsea SullivanAug 8, 2025
What to do if the image will not focus on National Microscope?
- L
  Luis PerezAug 8, 2025
  If the image on your National Microscope will not focus, try these steps: 1. Adjust the rack stop to the proper position. 2. Ensure the slide is placed correctly on the stage with the cover slip facing up. 3. Verify that you are using a 0.17mm thick cover slip (No.1 cover slip).
E
Edward PadillaAug 14, 2025
How to remove spots in field of view of National Microscope?
- C
  Carlos JuarezAug 14, 2025
  If you notice spots in the field of view while using your National Microscope, it might be due to a dirty lens or slide. Try cleaning the eyepiece or condenser lens. If the spots persist, clean the specimen slide.
M
Matthew WebbAug 20, 2025
Why image does not remain in focus on National 210 Microscope?
- J
  James PriceAug 20, 2025
  If the image on your National Microscope won't stay in focus, it could be because the stage is dropping due to its own weight. Try adjusting the tension control to stabilize the stage.

Summary

Unpacking and Operation

Unpacking Procedures

Instructions for safely removing the microscope from its packaging and retaining materials.

Description of Components

Detailed explanations of the various parts and their functions on the microscope.

Initial Operation Setup

Guidance on positioning the microscope for comfortable viewing and operation.

Lighting Operation

Instructions for operating the illumination system for both 210 and 210-RLED models.

Basic Operation Steps

Step-by-step guide for focusing and viewing specimens with the microscope.

Changing Magnification

Explanation of how to adjust magnification by rotating the objective turret.

Maintenance Procedures

Optical Maintenance

Guidelines for cleaning and maintaining lens surfaces to ensure image quality.

Mechanical Maintenance

Procedures for adjusting mechanical components like the rack stop and focus tension.

Electrical Maintenance

Instructions for maintaining electrical parts, including LED, fuse, and battery systems.

Troubleshooting

Troubleshooting Guide

A table listing common problems, their causes, and suggested solutions.

Accessories and Warranty

Optional Accessories and Parts

List of available accessories and replacement parts for the microscope.

Limited Lifetime Warranty

Information regarding the limited lifetime warranty and its terms.

Summary

Unpacking and Operation

Unpacking Procedures

Instructions for safely removing the microscope from its packaging and retaining materials.

Description of Components

Detailed explanations of the various parts and their functions on the microscope.

Initial Operation Setup

Guidance on positioning the microscope for comfortable viewing and operation.

Lighting Operation

Instructions for operating the illumination system for both 210 and 210-RLED models.

Basic Operation Steps

Step-by-step guide for focusing and viewing specimens with the microscope.

Changing Magnification

Explanation of how to adjust magnification by rotating the objective turret.

Maintenance Procedures

Optical Maintenance

Guidelines for cleaning and maintaining lens surfaces to ensure image quality.

Mechanical Maintenance

Procedures for adjusting mechanical components like the rack stop and focus tension.

Electrical Maintenance

Instructions for maintaining electrical parts, including LED, fuse, and battery systems.

Troubleshooting

Troubleshooting Guide

A table listing common problems, their causes, and suggested solutions.

Accessories and Warranty

Optional Accessories and Parts

List of available accessories and replacement parts for the microscope.

Limited Lifetime Warranty

Information regarding the limited lifetime warranty and its terms.

National 210 Specifications

General

Objectives	4X, 10X, 40X
Magnification	40X-400X
Type	Biological
Head	Monocular
Eyepiece	10x
Focusing System	Coarse and Fine
Stage	Fixed stage with clips

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