OUBO 18L
OUBO Class B Digital Tabletop Drying Function Sterilizer (18L) User Manual
Model: 18L
1. Introduction
This manual provides essential instructions for the safe and efficient operation, installation, and maintenance of your OUBO Class B Digital Tabletop Drying Function Sterilizer (18L). This advanced steam sterilizer is designed for the sterilization of medical instruments and materials, featuring triple vacuum pressure, a drying function, a built-in printer, and a USB connector for data logging. Please read this manual thoroughly before operating the device and retain it for future reference.
2. Safety Information
Adherence to safety guidelines is crucial for preventing injury and ensuring proper device function. Always follow these precautions:
- Read and understand all instructions before use.
- Operate the sterilizer only in a well-ventilated area.
- Use only distilled water for operation to prevent mineral buildup and damage.
- Ensure the power supply matches the device's requirements.
- Do not open the chamber door during a sterilization cycle.
- Allow instruments to cool before handling after a cycle.
- Regularly inspect the door seal and other components for wear or damage.
- Maintenance should only be performed by qualified personnel.
3. Product Overview
Familiarize yourself with the main components of your sterilizer.
3.1. Components Diagram

Figure 1: Front and Rear View of the Sterilizer with Labeled Components.
| No. | Component | No. | Component |
|---|---|---|---|
| 1 | Door | 12 | Main power switch |
| 2 | Seal | 13 | Drain connector (Distilled water tank) |
| 3 | Door lock | 14 | Drain connector (Used water tank) |
| 4 | Door handle | 15 | Condenser vent |
| 5 | Chamber | 16 | Circuit breaker |
| 6 | Door spindle | 17 | Power socket |
| 7 | Distilled water tank | 18 | Used water tank vent |
| 8 | Nixie tube display | 19 | Safety valve |
| 9 | Glass touch button | 20 | Bacteriological filter |
| 10 | Printer (Optional) | 21 | Drain connector (Used water) |
| 11 | USB port | 22 | Rating plate |
4. Setup
4.1. Unboxing and Placement
- Carefully remove the sterilizer from its packaging. Inspect for any shipping damage.
- Place the sterilizer on a stable, level surface capable of supporting its weight. Ensure adequate clearance around the unit for ventilation and maintenance.

Figure 2: Sterilizer and Packaging.
4.2. Power Connection
- Locate the power socket (17) and circuit breaker (16) on the rear of the unit.
- Connect the power cord securely to the sterilizer and a grounded electrical outlet.
- Ensure the circuit breaker is in the 'ON' position.

Figure 3: Power Connection Points.
4.3. Water Filling
- Open the lid of the distilled water tank (7) located on the top of the sterilizer.
- Pour only distilled water into the tank until it reaches the maximum fill line. Do not overfill.
- Close the lid securely.

Figure 4: Distilled Water Tank Access.
4.4. Initial Self-Check and Operation Overview
This video demonstrates the initial setup, loading of instruments, and basic operation of the sterilizer, including the self-check process and program selection.
Video 1: OUBO Class B Sterilizer Setup and Operation Guide. This video illustrates the process of opening the door, loading instruments onto the trays, closing the door, switching on the unit, and navigating the control panel to select programs and temperatures before starting a sterilization cycle.
5. Operating Instructions
5.1. Loading Instruments
- Open the sterilizer door (1) using the door handle (4).
- Place instruments onto the provided trays. Ensure instruments are clean and properly arranged to allow steam penetration. Do not overload trays.
- Insert the loaded trays into the chamber (5).

Figure 5: Loading Instruments into the Chamber.
5.2. Control Panel Overview
The control panel features a Nixie tube display (8) and glass touch buttons (9) for program selection and monitoring.

Figure 6: Control Panel Layout and Indicators.
5.3. Selecting Sterilization Program
Use the program button to cycle through available sterilization programs:
- Unwrapped: For unwrapped solid instruments.
- Wrapped: For wrapped instruments or porous loads.
- Prion: For specific prion decontamination cycles.
5.4. Selecting Temperature
Use the temperature selection button to choose between:
- 121°C: Standard sterilization temperature.
- 134°C: Higher temperature sterilization for specific materials.
5.5. Selecting Test Programs
The sterilizer includes diagnostic test programs:
- B&D/Helix Test: Bowie & Dick / Helix test for steam penetration.
- Vacuum Test: Checks for vacuum integrity.
5.6. Starting and Monitoring a Cycle
- After selecting the desired program and temperature, press the 'Start' button.
- The display will show the current pressure, temperature, and cycle status.
- The built-in printer (10) will automatically print process data and date upon completion.
5.7. Unloading Instruments
- Once the cycle is complete and the pressure has normalized, the door lock icon will indicate it is safe to open the door.
- Carefully open the door (1) and remove the sterilized instruments using the provided plastic handle.
- Allow instruments to cool before handling or storage.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your sterilizer.
6.1. Cleaning the Chamber
Clean the interior of the chamber and trays regularly with a soft cloth and mild detergent. Rinse thoroughly and dry.
6.2. Draining Water Tanks
The sterilizer features automatic drainage and steam exhaust. However, periodically drain the distilled water tank (7) and the used water tank (21) via their respective drain connectors (13, 14) to prevent stagnation and buildup.
6.3. Door Seal Maintenance
Inspect the door seal (2) for cracks, tears, or hardening. Replace if necessary to maintain proper sealing during cycles. The following diagram illustrates the proper installation of the door seal:

Figure 7: Door Seal Installation Steps.
7. Troubleshooting
Refer to the table below for common issues and their potential solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Sterilizer does not power on | Power cord disconnected, circuit breaker tripped | Check power cord connection, reset circuit breaker (16) |
| Cycle does not start | Door not properly closed, water tank empty | Ensure door is securely latched, fill distilled water tank (7) |
| Steam leakage from door | Door seal (2) damaged or improperly seated | Inspect and clean door seal, replace if damaged. Ensure door is closed firmly. |
| Error code displayed | Specific system malfunction | Refer to the full error code list in the comprehensive manual or contact customer support. |
| Printer not working | No paper, paper jam, printer malfunction | Check paper supply, clear any jams, ensure printer is properly connected. |
8. Specifications
Technical specifications for the OUBO Class B Digital Tabletop Drying Function Sterilizer (18L).
| Item | 18L-E |
|---|---|
| Chamber (mm) | Ø 250 x 350 |
| Rated Voltage | 110-130 VAC, 60 Hz / 220-240 VAC, 50 Hz |
| Circuit breaker | F16A / F20A / 400V |
| Nominal power | 1750VA |
| Sterilization temperature | 121°C / 134°C |
| Capacity of the distilled water tank | Approx 2.5 L (Water at level Max) Approx 0.5 L (Water at level Min) |
| Operation temperature | 5°C - 40°C |
| Operation relative Humidity | Max. 80%, non condensing |
| Overall dimensions WxHxD (mm) | 490x455x640 |
| Net weight | 45 kg |
| Max. Noise level | <70 dB |
| Atmospheric pressure | 76 kPa - 106 kPa |
9. What's in the Box
The following items are included with your OUBO Class B Digital Tabletop Drying Function Sterilizer (18L):

Figure 8: Included Accessories.
- OUBO Class B Digital Tabletop Drying Function Sterilizer (18L)
- Instrument Tray Rack
- Plastic Handle
- Metal Handle
- Power Cord
- Water and Steam Pipes (x2)
- Sealing Ring
- User Manual (this document)
10. Warranty and Support
Your OUBO Class B Digital Tabletop Drying Function Sterilizer is covered by a manufacturer's warranty. For detailed warranty information, technical support, or service inquiries, please refer to the warranty card included with your product or contact your authorized dealer. Always provide your model number (18L) and serial number when seeking support.
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