YUEWO HH1

Electric Digital Display Constant Temperature Water Bath User Manual

Model: HH-1

Brand: YUEWO

1. Introduction

This user manual provides detailed instructions for the operation and maintenance of the YUEWO Electric Digital Display Constant Temperature Water Bath, Model HH-1. This instrument is designed for precise temperature control in laboratory settings, suitable for various scientific and industrial applications requiring a stable temperature environment.

The water bath features a stainless steel inner tank, digital temperature display, and automatic temperature control, ensuring reliable and accurate performance.

2. Safety Precautions

To ensure safe operation and prevent damage to the instrument or injury to personnel, please observe the following safety guidelines:

  • Electrical Safety: The product uses a three-hole safety outlet socket for AC 221V power. Ensure the instrument is properly grounded. Do not ground to gas pipes.
  • Water Level: Always inject water into the tank above the bulkhead before plugging in the power. Ensure the heating pipe is always submerged in water during operation. Operating without sufficient water can cause burning of heating pipes, solder melt, or electric shock.
  • Water Volume: When performing boiling distillation at 101°C, do not inject excessive water to prevent overflow during boiling.
  • General Operation: The machine has heating and thermostatic indicator lights to show working status. The digital display shows the actual temperature of the bath.

3. Product Components and Features

The YUEWO Constant Temperature Water Bath is constructed with high-quality materials and features for optimal performance.

Front view of HH-1 water bath with digital display
Figure 3.1: YUEWO HH-1 Electric Digital Display Constant Temperature Water Bath. This image shows the compact design of the HH-1 model, featuring a single bath opening and a digital control panel on the right side.
Top-down view of the HH-1 water bath's interior
Figure 3.2: Interior view of the HH-1 water bath. This image highlights the stainless steel inner tank and the heating element positioned at the bottom of the bath.
Close-up of the HH-1 water bath's digital control panel
Figure 3.3: Digital control panel of the HH-1 water bath. This close-up shows the digital temperature display and control buttons for setting temperature and monitoring operation.
Detailed view of the water bath interior with heating element and carrier
Figure 3.4: Detailed view of the water bath interior. This image illustrates the heating element and the removable carrier, designed to hold samples above the heating element.
Image showing the electrostatic spray treatment process for the outer shell
Figure 3.5: Electrostatic spray treatment process. This image demonstrates the high-quality finish of the outer shell, which provides corrosion resistance and a durable appearance.
Image showing the thickness measurement of the carrier
Figure 3.6: Carrier thickness measurement. This image shows the carrier, which is designed to be robust with a thickness exceeding 1mm, ensuring stability for samples.
Image showing the thickness measurement of the pot
Figure 3.7: Pot thickness measurement. This image illustrates that the pot's thickness reaches 1.2mm, contributing to its durability and heat retention capabilities.
Image showing the thickness measurement of the stainless steel liner
Figure 3.8: Stainless steel liner thickness measurement. This image confirms the liner's thickness of 0.6mm or more, ensuring excellent corrosion resistance.
  • Durable Construction: The water tank studio is made from stainless steel, offering excellent corrosion resistance. The cold-rolled steel chassis is well-made and robust.
  • Precision Temperature Control: Equipped with a high-precision digital display and automatic temperature control system.
  • Galvanized Alumina Lid: The water bath lid is made of galvanized alumina, designed to be rust-resistant and durable.
  • Intelligent Temperature Control: Features a standard NUOHAI brand intelligent temperature control instrument for accurate temperature control and long service life.
  • Modular Control Unit: The control core component is a modular control unit, enhancing reliability and ease of maintenance.
  • High-Quality Heating Element: Utilizes a high-quality 304 stainless steel electric heating tube and temperature sensor. The entire inner liner, including screws, is made of 304 stainless steel.
  • Fine Workmanship: The unit exhibits fine workmanship and uses thick materials, including spray panels for the invisible floor.

4. Setup and Installation

  1. Unpacking: Carefully remove the water bath from its packaging. Inspect for any visible damage during transit.
  2. Placement: Place the instrument on a stable, level surface in a well-ventilated area, away from direct sunlight or strong vibrations. Ensure there is adequate space around the unit for air circulation and access.
  3. Water Filling: Before connecting power, fill the stainless steel tank with distilled or deionized water. Ensure the water level is above the heating element and the bulkhead, but below the rim to prevent overflow during heating.
  4. Power Connection: Connect the power cord to a properly grounded AC 221V three-hole safety outlet. Ensure the power supply matches the instrument's requirements.

5. Operating Instructions

Follow these steps to operate your YUEWO Constant Temperature Water Bath:

  1. Power On: After ensuring the water level is correct and the unit is properly grounded, switch on the main power switch, usually located on the control panel. The digital display will illuminate, showing the current water temperature.
  2. Setting Temperature:
    • Press the SET key to check the current set temperature.
    • Press the SET button again. The character on the display will start to flash, indicating that the instrument is in setting mode.
    • Use the UP (▲) and DOWN (▼) keys to adjust the desired temperature value.
    • Once the desired temperature is set, press the SET key quickly again to exit the setting mode and return the instrument to normal operation. The display will show the actual temperature.
  3. Heating and Stabilization: The instrument will begin heating the water to the set temperature. The heating indicator light will be on during this phase. Once the set temperature is reached, the thermostatic indicator light will activate, and the unit will maintain the temperature within the specified accuracy.
  4. Monitoring: Continuously monitor the digital display to ensure the temperature remains stable.
  5. Power Off: When finished, switch off the main power switch and disconnect the power cord from the outlet. Allow the water to cool before draining.

6. Maintenance and Care

Regular maintenance ensures the longevity and optimal performance of your water bath.

  • Cleaning:
    • Always disconnect the power before cleaning.
    • Drain the water from the tank after each use or regularly to prevent algae growth and mineral buildup.
    • Clean the stainless steel tank with a mild detergent and a soft cloth. Avoid abrasive cleaners or scouring pads that could scratch the surface.
    • Wipe the exterior of the unit with a damp cloth. Do not allow water to enter the control panel or electrical components.
  • Descaling: If mineral deposits accumulate in the tank, use a descaling solution specifically designed for stainless steel, following the manufacturer's instructions. Rinse thoroughly after descaling.
  • Water Quality: Use distilled or deionized water to minimize mineral buildup and extend the life of the heating element and tank.
  • Storage: When not in use for extended periods, drain all water, clean the unit thoroughly, and store it in a dry, dust-free environment.

7. Troubleshooting

This section addresses common issues you might encounter with your water bath.

ProblemPossible CauseSolution
Unit does not power on.No power supply; power cord loose; fuse blown.Check power outlet and connection. Ensure power switch is ON. Check and replace fuse if necessary (refer to specifications for fuse rating).
Temperature not reaching set point or fluctuating.Insufficient water level; heating element malfunction; temperature sensor issue; lid not properly closed.Ensure water level is adequate. Contact technical support if heating element or sensor is suspected. Ensure lid is securely closed to minimize heat loss.
Digital display shows error code.Sensor fault; internal system error.Refer to the thermostat instructions (if provided separately) for specific error codes. If not, power cycle the unit. If error persists, contact technical support.
Water bath is noisy.Vibration from unstable surface; internal component issue.Ensure the unit is on a stable, level surface. If noise persists, contact technical support.

8. Technical Specifications

The following table outlines the technical specifications for the YUEWO Electric Digital Display Constant Temperature Water Bath (HH-1 model):

AttributeSpecification (HH-1)
ModelHH-1
Heating Power300W
Temperature Control Range+5°C to 100°C
Temperature Control Accuracy≤ ± 0.5°C
Heating Rate70 minutes from room temperature to boiling point
Fuse Tube4A
Working Size (L*W*H)160mm * 160mm * 120mm
Inner Tank MaterialStainless Steel
ManufacturerYUEWO
ASINB07RGK16NW
Date First AvailableMay 6, 2019

Note: Specifications are subject to change without prior notice for product improvement.

9. Warranty and Support

This product is covered by a standard return policy. For specific details regarding warranty coverage, returns, or technical support, please refer to your purchase documentation or contact the seller directly.

For further assistance, you may visit the YUEWO Store on Amazon or contact their customer service.

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