1. 简介
This manual provides instructions for the proper setup, operation, and maintenance of your Levenhuk 720B Binocular Microscope. Please read these instructions carefully before using the instrument to ensure correct usage and to prolong its lifespan. This microscope is designed for laboratory, clinical, and medical research applications.
2. 产品结束view
The Levenhuk 720B is a binocular compound microscope featuring multiple objective lenses and eyepieces for various magnification levels. It includes a mechanical stage, LED illumination, and coarse/fine focusing mechanisms.
图 2.1：正面 view of the Levenhuk 720B Binocular Microscope, showing the binocular head, objective lenses, mechanical stage，以及基本。
Figure 2.2: Included accessories: WF10x/18mm eyepieces (2), WF20x eyepieces (2), color filters (blue, yellow, green), immersion oil, cleaning cloth, hex key, and spare fuse.
3. 设置
- 拆包： 小心地从包装中取出所有部件。保留原包装以备日后运输或储存。
- 放置： Place the microscope on a stable, level surface away from direct sunlight, high temperatures, dust, and vibrations.
- 电源连接： Connect the power cord to the microscope's power input (AC100V-240V, 50/60Hz) located at the rear of the base, then plug it into a suitable electrical outlet. Ensure the power switch is in the OFF position before connecting.
- 目镜安装： Insert the desired eyepieces (e.g., WF10x) into the eyepiece tubes of the binocular head.
- Binocular Head Adjustment: If the binocular head is rotatable, adjust it to a comfortable view位置。
图 3.1：背面 view of the microscope showing the power input and switch.
4.操作说明
- 开机： Flip the power switch located on the rear of the microscope base to the ON position. Adjust the illumination intensity using the dimmer control.
- 标本放置： 将准备好的显微镜载玻片放在机械装置上tage. Secure it with the stage clips. Use the stage control knobs to center the specimen area of interest over the condenser aperture.
- 放大倍率选择： Rotate the revolving nosepiece to select the lowest power objective lens (e.g., 4x). Ensure the objective clicks firmly into place.
- 聚焦：
- While looking through the eyepieces, use the 粗调焦旋钮 使标本大致清晰。
- 然后，使用 微调旋钮 for precise focusing until the image is sharp and clear.
- 照明调节：
- 使用调光器调节亮度。
- Adjust the iris diaphragm lever on the condenser to control the amount of light reaching the specimen and improve contrast.
- 瞳距调节： Adjust the distance between the two eyepiece tubes by gently pushing them together or pulling them apart until you see a single, circular field of view.
- 屈光度调节： If one eyepiece has a diopter adjustment ring, focus on the specimen with your dominant eye (usually the right eye) using only the fine focus knob. Then, close your dominant eye and use the diopter adjustment ring on the other eyepiece to focus for your non-dominant eye without touching the fine focus knob.
- Higher Magnification: Once focused at low power, rotate the nosepiece to a higher power objective. Only minor adjustments with the fine focus knob should be needed due to the parfocal design.
- Immersion Oil (for 100x objective): For the 100x objective lens, a drop of immersion oil must be placed directly on the specimen slide. Lower the objective into the oil carefully. After use, clean the 100x objective and slide thoroughly with lens cleaning solution.
图 4.1：特写 view 机械的tage with the condenser and iris diaphragm visible below.
图 4.2： View of the illuminated condenser and objective lens from below the stage.
5. 维护
- 清洁镜头： Use a soft, lint-free lens cleaning cloth and a specialized lens cleaning solution. Never touch optical surfaces with your fingers.
- 常规清洁： 用柔软的布擦拭显微镜镜身。amp 布。 避免使用磨蚀性清洁剂或溶剂。
- 贮存： 不使用时，请用防尘罩盖住显微镜，以防止灰尘和碎屑进入。存放在干燥阴凉处。
- 保险丝更换： If the illumination fails, check the fuse located near the power input. Replace it with a fuse of the same type and rating (a spare fuse is included).
6。 故障排除
| 问题 | 可能的原因 | 解决方案 |
|---|---|---|
| 无照明 | Power cord disconnected, power switch off, dimmer at minimum, blown fuse. | Check power connection, turn on switch, increase dimmer, replace fuse. |
| 图片不清晰/模糊 | Incorrect focus, objective lens dirty, eyepiece dirty, slide upside down. | Adjust focus, clean lenses, check slide orientation. |
| 暗场 view | Iris diaphragm closed, low illumination, objective not clicked into place. | Open diaphragm, increase brightness, rotate nosepiece until objective clicks. |
| Two overlapping images | Interpupillary distance incorrect. | Adjust interpupillary distance until a single field of view is seen. |
7. 规格
- 型号： 69656
- 品牌： 莱文胡克
- 最大放大倍数： 2000倍
- 光源类型： 引领
- 物镜说明： 消色差
- 真实角度 View: 45 度
- 电源： 有线电动
- 卷tage: 110 伏
- 产品尺寸： 19.29 x 15.75 x 10.63 英寸
- 商品重量： 12.36 磅（5.62 公斤）
- UPC： 611901504766
8. 保修和支持
For warranty information and technical support, please refer to the documentation provided with your purchase or visit the official Levenhuk web网站。请保留购买凭证，以便进行保修索赔。