1. Introduction
This manual provides essential instructions for the safe and effective operation of your GemOro 1787 2.6-Quart Professional Heated Ultrasonic Machine. Please read this manual thoroughly before initial use and retain it for future reference.
The GemOro 1787 is designed for professional and personal use, offering powerful ultrasonic cleaning with a heated tank and digital timer for optimal results on various items, including jewelry, eyeglasses, and small parts.

Image 1.1: The GemOro 1787 2.6-Quart Professional Heated Ultrasonic Machine, showcasing its sleek black design and digital control panel.
2. Important Safety Information
WARNING: To reduce the risk of electric shock, fire, or injury, always follow these basic safety precautions.
- Read all instructions before using the appliance.
- Do not immerse the main unit in water or other liquids.
- Do not operate the unit if the power cord or plug is damaged.
- Keep the unit out of reach of children.
- Use only with the specified voltage.
- Do not operate the unit without liquid in the tank.
- Unplug the unit from the power outlet when not in use and before cleaning.
- Avoid touching the tank or solution during operation, especially when heated.
- Do not use flammable or corrosive cleaning solutions.
3. Package Contents
Verify that all components are present in the package:
- GemOro 1787 Ultrasonic Machine
- Removable Cleaning Basket
- Lid
- Instruction Manual (this document)

Image 3.1: The GemOro 1787 unit with its lid removed, showing the internal tank and the separate lid component.

Image 3.2: The removable cleaning basket, designed to hold items during the ultrasonic cleaning process.
4. Setup
- Placement: Place the ultrasonic machine on a stable, flat, and dry surface. Ensure there is adequate ventilation around the unit.
- Power Connection: Ensure the unit is unplugged before filling.
- Fill Tank: Open the lid and fill the stainless steel tank with water or a suitable ultrasonic cleaning solution. Do not exceed the MAX fill line. Ensure the liquid covers the items to be cleaned.
- Insert Basket: Place the cleaning basket into the tank.
- Add Items: Carefully place the items to be cleaned into the basket, ensuring they are not overcrowded.
- Close Lid: Close the lid securely.
- Plug In: Plug the power cord into a grounded electrical outlet.

Image 4.1: The GemOro 1787 ultrasonic machine with its lid closed, ready for operation after setup.
5. Operating Instructions
5.1 Control Panel Overview

Image 5.1: Close-up of the GemOro 1787 control panel, showing the digital display and buttons for ON, OFF, SET, and TC (Time/Clean).
- ON/OFF Button: Powers the unit on or off.
- SET Button: Used to adjust the cleaning time.
- TC (Time/Clean) Button: Initiates or stops the ultrasonic cleaning cycle.
- Digital Display: Shows the remaining cleaning time and temperature.
- Heat Indicator: Illuminates when the heating function is active.
- Working Indicator: Illuminates when the ultrasonic cleaning is active.
5.2 Starting a Cleaning Cycle
- Power On: Press the ON button. The digital display will illuminate.
- Set Time: Press the SET button repeatedly to cycle through the preset cleaning times (e.g., 180s, 280s, 380s, 480s, 90s). Select the desired duration.
- Activate Heat (Optional): If heating is desired, ensure the "Heat" indicator is on. The unit will automatically heat the solution to an optimal temperature. This may take several minutes.
- Start Cleaning: Press the TC button to begin the ultrasonic cleaning cycle. The "Working" indicator will illuminate, and the timer will count down.
- Cycle Completion: The unit will automatically stop when the timer reaches zero. An audible signal may indicate completion.
- Power Off: Press the OFF button to turn off the unit.
5.3 Recommended Cleaning Practices
- For heavily soiled items, pre-soak or gently brush them before ultrasonic cleaning.
- Use appropriate cleaning solutions for the items being cleaned. Consult a jeweler or specialist for delicate items.
- Do not clean items made of soft or porous materials like pearls, emeralds, opals, or costume jewelry with loose settings, as they may be damaged.
- Always use the cleaning basket to prevent items from resting directly on the tank bottom, which can reduce cleaning effectiveness and potentially damage the transducer.
- After cleaning, rinse items thoroughly with clean water and dry them with a soft cloth.
6. Maintenance
6.1 Draining and Cleaning the Tank
- Unplug: Always unplug the unit from the power outlet before draining or cleaning.
- Cool Down: If the heating function was used, allow the solution to cool down before handling.
- Empty Tank: Carefully pour out the used cleaning solution from the tank. Avoid spilling liquid onto the control panel or exterior of the unit.
- Wipe Clean: Wipe the inside of the stainless steel tank with a soft cloth. For stubborn residue, use a mild, non-abrasive cleaner.
- Exterior Cleaning: Wipe the exterior of the unit with a damp cloth. Do not use abrasive cleaners or immerse the unit in water.
6.2 Storage
When not in use, ensure the unit is clean, dry, and unplugged. Store it in a cool, dry place away from direct sunlight and extreme temperatures.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on. | Not plugged in; power outlet malfunction; unit malfunction. | Ensure power cord is securely plugged in. Test the outlet with another appliance. If still not working, contact customer support. |
| Ultrasonic cleaning not effective. | Insufficient cleaning solution; incorrect solution type; items overcrowded; excessive dirt. | Ensure tank is filled to the MAX line. Use appropriate cleaning solution. Do not overcrowd items. Pre-clean heavily soiled items. Increase cleaning time. |
| Heating function not working. | Heat function not activated; unit malfunction. | Ensure the heat indicator is on. Allow sufficient time for the solution to heat up. If still not working, contact customer support. |
| Unit makes unusual noise. | Normal operation sound; unit malfunction. | A slight buzzing sound is normal during ultrasonic operation. If the noise is loud or unusual, discontinue use and contact customer support. |
8. Specifications
- Model: 1787
- Capacity: 2.6 Quarts (2460mL)
- Ultrasonic Frequency: 42,000 Waves Per Second
- Heating Function: Digital Heater
- Timer: Digital, preset cycles
- Construction: Durable ABS
- Product Dimensions: 11.5 x 7 x 9 inches
- Item Weight: 5.25 pounds
- Manufacturer: GemOro
9. Warranty and Customer Support
The GemOro 1787 2.6-Quart Professional Heated Ultrasonic Machine comes with a 1 Year Limited Replacement Warranty. This warranty covers defects in materials and workmanship under normal use.
For warranty claims, technical assistance, or any questions regarding your product, please contact GemOro customer support. Refer to the product packaging or the official GemOro website for the most current contact information.
Please have your model number (1787) and proof of purchase available when contacting support.





