Introduction
This instruction manual provides detailed guidance for the setup, operation, and maintenance of your Bonvoisin Lab Scale 5000g/0.01g. This high-precision electronic analytical balance is designed for accurate weighing in laboratory, kitchen, and jewelry applications, offering a resolution of 0.01g and a maximum capacity of 5000g (11 lb).
What's in the Box?
- Scale Unit
- Weighing Pan
- Under Plate
- Screws (x2)
- Hexagon Wrench
- 110V Power Adapter
- Instruction Manual
- Service Card
Setup and Installation
Unboxing and Initial Inspection
Upon receiving your Bonvoisin Lab Scale, carefully open the packaging. The scale is well-packed with foam filling to ensure protection during transit. Verify that all components listed in the 'What's in the Box' section are present and undamaged.
Figure 1: Bonvoisin Lab Scale securely packaged with foam protection.
Assembly Instructions
Follow these steps to assemble your scale:
- Place the main scale unit on a stable, level surface. The adjustable front and rear legs, along with the built-in level indicator, help ensure optimal stability and accuracy.
- Attach the black under plate to the scale unit. Ensure the 'UP1' marking on the under plate aligns correctly with the corresponding point on the scale. Secure it firmly using the provided screws and hexagon wrench.
- Carefully place the detachable stainless steel weighing pan onto the under plate.
Figure 2: Key components of the Bonvoisin Lab Scale.
Power Supply
The scale can be powered by two methods:
- 110V Adapter: Connect the provided 110V adapter to the power input port on the scale and plug it into a standard wall outlet.
- 9V Battery: For portable use, open the battery compartment on the underside of the scale and insert a 9V battery (not included). The broadened battery compartment facilitates easier installation.
Figure 3: Dual power options for the scale.
Video 1: This video demonstrates the unboxing process, showing the protective foam packaging and all included components. It also illustrates the correct installation of the under plate and weighing pan, and how to connect the power adapter or install a 9V battery.
Operating Instructions
Turning On/Off
Press the ON/OFF button located on the control panel to turn the scale on or off. The clear backlit LCD display will illuminate upon activation.
Figure 4: Scale control panel and LCD display.
Unit Conversion
The scale supports 13 different unit conversions. Press the UNIT button repeatedly to cycle through the available units: g (gram), ct (carat), oz (ounce), ozt, N, lb (pound), dr, GN (grain), dwt, %, t/T, T, T/A/R.
Figure 5: Supported measurement units.
Tare Function
To subtract the weight of a container and weigh only the contents, use the Tare function. Place the empty container on the weighing pan and press the TARE ZERO button. The display will reset to zero. You can then add your items to the container, and the scale will display only the net weight.
Figure 6: Using the Tare function.
Counting Function (PCS)
The counting function allows you to accurately count multiple small items of uniform weight, such as pins, screws, or coins. To use this feature, place a sample quantity of items (e.g., 10, 20, 50, 100 pieces) on the pan, press the PCS button, and follow the on-screen prompts to set the sample size. Once the sample is registered, adding more items will display the total count.
Figure 7: Counting function in use.
Calibration
The scale supports both single-point and multi-point calibration to ensure optimal accuracy. Single-point calibration uses one known weight (e.g., 2000g for a 5000g scale), while multi-point calibration uses multiple known weights (e.g., 1000g, 2000g, 3000g, 4000g, 5000g). To calibrate, press the CAL button and follow the instructions displayed on the screen. Calibration weights are not included and must be purchased separately.
Figure 8: Scale during calibration with a weight.
USB Interface
The scale features a USB interface for serial data exchange with a computer or micro-printer. This allows for convenient organization and analysis of data results, and direct output to office software without requiring additional driver software. Please note that the data cable is NOT included.
Figure 9: USB interface for data transfer.
Maintenance and Care
Cleaning
The stainless steel weighing pan is detachable for easy cleaning. It can be wiped with a damp cloth or washed with mild soap and water. A protective membrane covers the buttons and screen to guard against light splashes, making cleaning simpler and extending the scale's operational life.
Figure 10: Detachable weighing pan for easy cleaning.
Storage
Store the scale in a dry, stable environment away from extreme temperatures, humidity, and direct sunlight. Avoid placing heavy objects on the pan when not in use to prevent damage to the sensor.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Scale does not turn on. | No power, loose connection, or dead battery. | Check power adapter connection. If using battery, ensure it is correctly installed and has sufficient charge. |
| Inaccurate readings. | Scale not level, unstable surface, or needs calibration. | Ensure scale is on a stable, level surface using the level indicator. Perform calibration with appropriate weights. Minimize vibrations or air currents. |
| Display shows "OVERLOAD" or similar error. | Weight exceeds maximum capacity. | Remove excess weight immediately. Do not exceed the maximum capacity of 5000g (11 lb). |
| Slow response time. | Normal for high-precision scales, or environmental interference. | Allow the scale a few seconds to stabilize. Minimize vibrations or air currents around the scale. |
Specifications
- Model: Bonvoisin Lab Scale (5000g, 0.01g)
- Capacity: 5000g (11 lb)
- Resolution: 0.01g
- Minimum Weighing: 0.05g
- Linearity Error Range: ±0.03 gram
- Unit Conversions: 13 units (g, ct, oz, ozt, N, lb, dr, GN, dwt, %, t/T, T, T/A/R)
- Weighing Pan Material: Stainless Steel
- Weighing Pan Size: 7.2 x 7.2 inches
- Display: Clear Backlit LCD
- Power Sources: 110V Adapter (included), 9V Battery (not included)
- Interface: USB (data cable not included)
- Dimensions: 14.96 x 11.65 x 6.34 inches
- Weight: 5.71 Pounds
- Manufacturer: Bonvoisin
- Country of Origin: China
Warranty and Support
For warranty information and technical support, please refer to the service card included in your product packaging. This document contains specific details regarding your product's warranty period and how to obtain support.
You can also visit the Bonvoisin Store on Amazon for additional product information and support resources.
