1. Introduction
The Herwicm Compound Binocular Microscope RM is an advanced optical instrument designed for detailed observation of microscopic specimens. It features a wide magnification range from 40X to 2500X, dual LED lighting, and a precise two-layer mechanical stage, making it suitable for various scientific explorations, educational purposes, and hobbyist use. This manual provides essential information for the proper setup, operation, and maintenance of your microscope.
2. Safety Information
- Do Not Disassemble: This instrument is precisely adjusted before leaving the factory. Disassembling it may cause electric shock or damage to the instrument.
- Prevent Burns: When the instrument is energized for use, the temperature of the bulb and nearby parts may be high. Be careful not to burn yourself when using it.
- Prevent Fire: Do not bring flammable materials such as alcohol, gasoline, or paper near the bulb to prevent fire.
- Environmental Conditions: Do not expose the microscope to direct sunlight. Store it in a dry, clean place. Avoid high temperature and severe vibration. Recommended operating temperature is 0°C-40°C, with a maximum relative humidity of 85%.
- Lens Care: Avoid any impact on the clarity of the image and do not leave marks or fingerprints on the surface of the lens.
3. Package Contents
The Herwicm Compound Binocular Microscope RM comes with a comprehensive set of components and accessories to enhance your viewing experience:
- Microscope Unit
- Carrying Case
- Power Adapter
- Phone Holder
- USB Cable
- Eyepieces: WF10x (2), WF25x (2)
- Prepared Slides (10 pcs): Fish gill, Letter "e", House Fly Leg, Honeybee Wings, Daphnia, Leaf stomata, Lillium Pollen, Pine Leaf, Tilia Stem, Onion Epidermis
- Empty Slides (18 pcs)
- Tools: Tweezers, scissors, droppers, etc.

4. Setup
- Unpacking: Carefully remove the microscope and all components from the carrying case. Place the microscope on a stable, flat surface.
- Eyepiece Insertion: Insert the desired eyepieces (WF10x or WF25x) into the binocular head.
- Power Connection: Insert the small plug of the AC power adapter into the socket on the back of the microscope base. Plug the adapter into a standard electrical outlet.
5. Operating Instructions
- Eyepiece Adjustment: Adjust the interpupillary distance by moving the eyepiece tubes closer or further apart until a single circular field of view is observed. Adjust the diopter on one eyepiece for individual eye focus.
- Objective Lens Selection: Rotate the revolving nosepiece to select the desired objective lens (4x, 10x, 40x, 100x). Start with the lowest magnification (4x) for initial viewing.
- Stage Movement: Use the X-Y mechanical stage knobs to move the specimen slide left/right and forward/backward for precise positioning.
- Focusing: Use the coarse focus knob for large adjustments to bring the specimen into approximate focus. Use the fine focus knob for sharp, detailed focusing.
- Lighting Control: Turn on the dual LED lights using the switch on the base. Adjust the brightness using the dimmer control. The microscope features both top and bottom LED lights for versatile illumination.
- Color Filter Usage: The microscope includes a color filter wheel located beneath the stage. Rotate the wheel to select different colored filters (e.g., blue, yellow, pink) to enhance contrast for various specimens.
- Phone Adapter Usage: Attach the phone holder to one of the eyepieces. Secure your smartphone in the holder, aligning its camera lens with the eyepiece. Use your phone's camera app to view and capture images or videos of the magnified specimen. A Bluetooth remote is included for remote photo capture.
- Electronic Eyepiece (Optional): For computer viewing, remove one eyepiece and insert the electronic eyepiece. Connect the electronic eyepiece to your computer via the provided USB cable. Use compatible software on your computer to view the live feed from the microscope.



6. Preparing Slides
6.1 Preparing a Dry Mount
- Select a Clean Slide: Hold a slide up to a light source and look through to make sure it is free from smudges and dirt. If you find the slide has any contamination on it—including your own fingerprints—give it a quick wash with liquid soap and water. Dry the slide using a clean cloth. Do not use tissues or paper towels, as these can leave lint behind.
- Prepare the Specimen: Inspect the specimen to determine if it needs to be sliced. (The sample specimen needs to be translucent or transparent.) Use a razor blade to cut your specimen material into a thin, translucent slice. A dry mount is ideal for inspecting samples that are not at risk of drying out.
- Set a Cover Slip Over the Specimen: Use a pair of forceps to pick up the thin slice of your sample specimen, and then place a cover slip over the specimen.
6.2 Preparing a Wet Mount
- Drip Water on the Slide: Prepare a clean slide, and then place 1 drop of water onto the center of the slide.
- Place Specimen in the Water: Slice a section of wet sample specimen and use tweezers to transfer it to the water drop. Materials commonly used to make wet mounts include cheek cells or tooth plaque (use a toothpick), or a thin cross-section of a plant stem (use a razor blade).
- Set a Cover Slip Over the Specimen: Use a pair of forceps to pick up the thin slice of your sample specimen, and then place a cover slip over the specimen.

7. Maintenance
- Cleaning Lenses: Use a soft, lint-free cloth or lens paper to gently clean the objective lenses and eyepieces. For stubborn smudges, use a small amount of lens cleaning solution.
- Cleaning Body: Wipe the microscope body with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials.
- Storage: Store the microscope in its carrying case in a dry, dust-free environment when not in use. Ensure all components are securely placed.
8. Troubleshooting
- Unclear Image: Check if the specimen is properly focused using both coarse and fine adjustment knobs. Ensure the objective lens and eyepiece are clean. Verify that the lighting is adequate and adjusted correctly.
- No Illumination: Check if the power adapter is securely connected and the microscope is switched on. Ensure the brightness control is not set to minimum.
- Specimen Not Moving: Ensure the slide is correctly placed under the stage clips and the X-Y mechanical stage knobs are functioning properly.
9. Specifications
| Feature | Specification |
|---|---|
| Brand | Herwicm |
| Model Name | RM |
| Magnification Maximum | 40x (up to 2500x with included eyepieces) |
| Eyepieces | WF10x, WF25x |
| Objective Lenses | 4x, 10x, 40x, 100x |
| Light Source Type | Dual LED (Top and Bottom) |
| Stage Type | Two-Layer Mechanical Stage |
| Product Dimensions | 14.37 x 11.41 x 6.49 inches |
| Item Weight | 5.41 pounds |
| Material | Glass (Lenses), Metal/Plastic (Body And Stage) |
| Voltage | 240 Volts |
10. Warranty and Support
For warranty information or technical support, please refer to the documentation included in your product packaging or contact Herwicm customer service directly. Keep your purchase receipt as proof of purchase.





