1. Introduction
This manual provides detailed instructions for the safe and efficient operation of your Bonvoisin Digital Crane Scale, Model XXX-92-SXL. This heavy-duty industrial hanging scale is designed for precise weight measurement up to 3000kg (6600lb) and features a dual-purpose design for use as a dynamometer. Please read this manual thoroughly before use and retain it for future reference.
2. Product Features
- Dual-Purpose Design: Equipped with closed circular rings on both top and bottom, allowing it to function as both a crane scale for weighing and a dynamometer for measuring pulling force and tension.
- Unit Conversion: Easily switch between kilograms (kg) and pounds (lb) units to suit various measurement requirements.
- Peak Hold Function: Captures and displays the maximum force or weight recorded during a measurement, useful for applications requiring peak load data.
- Data Hold Function: Locks the current measured value on the display, enabling convenient reading even when the scale or load is in motion.
- High Precision: Adheres to OIML III accuracy class standards, ensuring reliable and accurate measurement results for professional use.
- Waterproof Panel: The control panel is designed to resist splashes and moisture, enhancing durability and allowing operation in humid or outdoor environments.
- Large LCD Display: Features a clear LCD display for easy readability of measurements.
- Auto Shut-Off: Includes an adjustable auto shut-off feature to conserve battery life.
3. Setup and Installation
3.1 Battery Installation
The crane scale requires 3 AA batteries (not included). To install the batteries:
- Locate the battery compartment cover, typically on the back or side of the scale.
- Rotate the cover counter-clockwise to open it.
- Insert 3 AA batteries, ensuring correct polarity (+/-).
- Replace the battery compartment cover and rotate clockwise to secure it.

3.2 Mounting the Scale
Attach the crane scale securely to a suitable lifting mechanism (e.g., crane hook, hoist) using the top circular ring. Ensure the connection is stable and capable of supporting the maximum weight capacity of the scale (3000kg/6600lb) plus any additional load.

4. Operating Instructions
4.1 Power On/Off
- Press the ON/OFF button to turn the scale on.
- Press and hold the ON/OFF button to turn the scale off.
4.2 Unit Conversion (kg/lb)
To switch between kilograms (kg) and pounds (lb):
- Press and hold the HOLD key until the unit changes on the display.

4.3 Tare Function
The Tare function allows you to subtract the weight of a container or fixture, so only the net weight of the item is measured.
- Place the empty container or fixture on the scale.
- Press the TARE button. The display will reset to zero.
- Add the item to be weighed into the container. The display will show the net weight of the item.
4.4 Peak Hold Function
The Peak Hold function records and displays the maximum weight or force applied during a measurement cycle.
- Press the PEAK button to activate this function. A "P" indicator may appear on the screen.
- Apply the load. The display will continuously update to show the highest value reached.
- Once the load is removed or stabilized, the display will retain the peak value.

4.5 Data Hold Function
The Data Hold function allows you to freeze the current reading on the display.
- Once a stable weight is displayed, press the HOLD button. The reading will be locked on the screen.
- Press the HOLD button again to release the reading and return to live measurement.

4.6 Auto Shut-Off and Idle Mode Settings
The scale features adjustable auto shut-off and idle mode times to conserve power. Refer to the specific settings menu (if available, usually accessed by holding a button during power-on) to configure these options. Common settings include 5, 10, 15, 30, or 60 minutes for auto shut-off, and 5, 10, 30, or 60 seconds for idle mode.
4.7 Backlit Brightness Adjustment
The display backlight brightness can be adjusted for optimal visibility in various lighting conditions. Options typically include Off, Dim, Normal, and Bright. Consult the scale's settings menu for adjustment procedures.
5. Maintenance
5.1 Cleaning
The scale features a waterproof control panel, allowing for operation in wet conditions. To clean the scale:
- Wipe the surface with a damp cloth.
- Avoid using abrasive cleaners or solvents that could damage the display or housing.
- Ensure the battery compartment is sealed before cleaning with moisture.

5.2 Storage
When not in use for extended periods, remove the batteries to prevent leakage and store the scale in a dry, cool place.
5.3 Calibration
This scale is factory calibrated. If recalibration is required due to significant discrepancies or after prolonged use, consult a qualified technician or refer to specific calibration instructions provided separately by the manufacturer, if available.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Scale does not turn on. | Dead or incorrectly installed batteries. | Check battery polarity. Replace with new AA batteries. |
| Inaccurate readings. | Scale not stable; overloaded; needs calibration. | Ensure scale is hanging freely and stably. Do not exceed maximum capacity. If persistent, consider professional calibration. |
| Display shows "OL" or "Err". | Overload condition. | Remove excess weight immediately. Do not exceed the scale's maximum capacity. |
| Display is dim or flickering. | Low battery power; backlight setting. | Replace batteries. Adjust backlight brightness setting. |
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Bonvoisin |
| Model | XXX-92-SXL |
| Weight Capacity Maximum | 3000 kg (6600 lb) |
| Display Type | LCD |
| Measurement Type | Weight |
| Weigh Scale Type | Suspension Scale |
| Material Type | Metal (Alloy Steel Shell) |
| Power Source | 3 x AA Batteries (not included) |
| Special Features | Auto Shut Off, Large Display, Unit Conversion, Peak Hold, Data Hold, Waterproof Panel |
| Color | Silver |
| UPC | 780682679946 |
| GTIN | 780682679946 |
8. Safety Information
Always observe the following safety precautions when using the Bonvoisin Digital Crane Scale:
- Do not exceed the maximum weight capacity of 3000kg (6600lb). Overloading can cause damage to the scale and lead to serious injury.
- Ensure the scale is securely attached to a stable and appropriate lifting device before applying any load.
- Keep hands and body clear of suspended loads.
- Inspect the scale, hooks, and rings for any signs of wear, damage, or deformation before each use. Do not use if damaged.
- Operate the scale on a level and stable surface when not suspended.
- Avoid sudden impacts or drops, as this can affect accuracy and durability.
- Do not attempt to disassemble or repair the scale yourself. Refer to qualified personnel for service.
- Keep the scale away from strong electromagnetic fields, which can interfere with its electronic components.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please contact Bonvoisin customer service. Details can typically be found on the product packaging or the official Bonvoisin website. Please have your model number (XXX-92-SXL) and purchase date available when contacting support.