Bonvoisin 500g x 0.01g High Precision Electronic Analytical Balance User Manual

1. Introduction

This manual provides essential instructions for the proper setup, operation, and maintenance of your Bonvoisin 500g x 0.01g High Precision Electronic Analytical Balance. Designed for accuracy and reliability, this balance is suitable for various applications including laboratory, kitchen, and jewelry weighing.

The balance features an upgraded high-sensitivity built-in sensor, adjustable feet, a level bubble for precise leveling, overload alarm, error indication, and external calibration capabilities. It offers 13 unit conversions and a large LCD display for clear readings.

Image 1.1: Front view of the Bonvoisin 500g x 0.01g Electronic Analytical Balance.

2. Product Overview

2.1 Components

Image 2.1: Key components of the balance, including the LCD display, control buttons, weighing pan, adjustable feet, and level bubble.

• Weighing Pan: Stainless steel, 180x140mm, for placing items to be weighed.
• LCD Display: Large, backlit screen for clear weight readings and operational indicators.
• Control Buttons:
  • ON/OFF: Powers the unit on or off.
  • UNIT: Changes the weighing unit.
  • PCS (Counting): Activates the piece counting function.
  • CAL (Calibration): Initiates the calibration process.
  • TARE/ZERO: Zeros the scale or tares the weight of a container.
• Adjustable Feet: For leveling the balance on uneven surfaces.
• Level Bubble: Indicates if the balance is perfectly level for accurate measurements.

2.2 Features

• High Precision: 0.01g accuracy across various capacities (200g-5000g models).
• Large Weighing Pan: 180x140mm stainless steel pan.
• Multiple Unit Conversions: g, ct, oz, ozt, N, lb, dr, GN, dwt, %, t/T, T, T/A/R.
• Functions: Tare, memory, counting, fault visualization, overload alarm, external calibration.
• Power Options: AC adapter or 9V DC battery (not included).

3. Setup

3.1 Unpacking and Placement

1. Carefully remove the balance from its packaging.
2. Place the balance on a stable, level surface, free from vibrations, drafts, and direct sunlight.
3. Ensure the weighing pan is correctly seated on the scale. Refer to Image 3.1 for correct pan placement.

Image 3.1: Correct placement of the weighing pan (dented side face upside) for stable measurements.

3.2 Leveling the Balance

Accurate measurements depend on a perfectly level balance. Use the adjustable feet and the built-in level bubble to achieve this.

1. Locate the level bubble, typically on the front or side of the balance.
2. Adjust the four screws (feet) at the bottom of the balance until the air bubble is centered within the circle of the level indicator.

Image 3.2: Detail of adjustable feet and level bubble for precise leveling.

3.3 Power Connection

The balance can be powered by an AC adapter or a 9V DC battery.

• AC Power: Connect the provided AC adapter to the power input port on the balance and then to a suitable power outlet.
• Battery Power: Insert a 9V DC battery into the battery compartment (battery not included).

Image 3.3: Illustration of the two power options: AC power cable and 9V battery.

4. Operation

4.1 Basic Weighing

1. Press the ON/OFF button to turn on the balance. Wait for the display to show "0.00g".
2. Place the item directly onto the center of the weighing pan. The weight will be displayed.

Image 4.1: The balance displaying a precise weight measurement.

4.2 Tare Function

The tare function allows you to subtract the weight of a container, so only the weight of the contents is measured.

1. Place an empty container on the weighing pan. The display will show its weight.
2. Press the TARE/ZERO button. The display will reset to "0.00g".
3. Add the items to be weighed into the container. The display will show the net weight of the items.

Image 4.2: Step-by-step guide for using the tare function.

4.3 Unit Conversion

To change the weighing unit, press the UNIT button repeatedly until the desired unit is displayed. The available units include:

• Grams (g)
• Carats (ct)
• Ounces (oz)
• Troy Ounces (ozt)
• Newtons (N)
• Pounds (lb)
• Drams (dr)
• Grains (GN)
• Pennyweights (dwt)
• Percentage (%)
• Tael (t/T, T, T/A/R)

4.4 Piece Counting (PCS)

The piece counting function allows you to count multiple items of the same weight.

1. Place a sample quantity of items (e.g., 10, 20, 50, or 100 pieces) on the weighing pan.
2. Press the PCS button. The display will prompt you to select the sample quantity.
3. Use the UNIT button to select the corresponding sample quantity (e.g., "10", "20").
4. Press PCS again to confirm. The display will now show the number of pieces.
5. You can now add more items, and the balance will count them based on the sample weight.

5. Calibration

Regular calibration ensures the accuracy of your balance. This model supports external calibration.

1. Ensure the balance is on a stable, level surface and powered on.
2. With nothing on the weighing pan, press and hold the CAL button until the display shows "CAL" followed by a calibration weight value (e.g., "500.00g").
3. Place the specified calibration weight (e.g., 500g) onto the center of the weighing pan.
4. The balance will process the calibration. Once complete, the display will show "PASS" or return to normal weighing mode.
5. Remove the calibration weight.

Note: For 500g to 3000g capacity scales, calibration weights are typically included. For 5000g scales, calibration weights are not included due to their size and potential for shipping damage.

Image 5.1: Initiating the calibration process by pressing the CAL button.

6. Maintenance

6.1 Cleaning

To maintain accuracy and prolong the life of your balance:

• The stainless steel weighing pan is removable for easy cleaning. Wipe it with a soft, damp cloth and mild detergent if necessary.
• Do not use abrasive cleaners or immerse the balance in water.
• The display and buttons are protected by a film to prevent liquid spills. Wipe gently with a dry or slightly damp cloth.

Image 6.1: The removable weighing tray facilitates easy cleaning.

Image 6.2: The protective film on the display and buttons helps prevent damage from spills.

6.2 Storage

When not in use, store the balance in a clean, dry environment, away from extreme temperatures, humidity, and direct sunlight.

7. Troubleshooting

8. Specifications

9. Warranty and Support

Bonvoisin provides a 1-year warranty for this product. If you encounter any issues with the scale or charger within this period, please contact Bonvoisin customer support for assistance or replacement.

For further support or inquiries, please visit the official Bonvoisin store or contact their customer service department. You can find more information at the Bonvoisin Store on Amazon.