1. Introduction
This manual provides detailed instructions for the safe and effective use of your GOYOJO Digital Torque Wrench (Model GM200-JP). Please read this manual thoroughly before operation and retain it for future reference. This high-precision, durable digital torque wrench offers three measurement modes and four unit options, making it suitable for various applications including automotive, motorcycle, and bicycle maintenance.
Image 1.1: GOYOJO Digital Torque Wrench (Model GM200-JP)
2. Safety Information
Always observe the following safety precautions to prevent injury or damage to the tool and workpiece:
- Wear appropriate personal protective equipment, such as safety glasses and gloves, during operation.
- Ensure the workpiece is securely fastened before applying torque.
- Do not exceed the maximum torque capacity of the wrench (200 Nm).
- Avoid dropping the wrench or subjecting it to strong impacts, as this may affect its accuracy.
- Keep the wrench clean and dry. Do not expose it to water or corrosive substances.
- Store the wrench in its protective case when not in use.
- Do not attempt to disassemble or modify the wrench. Repairs should only be performed by qualified personnel.
3. Product Components
The GOYOJO Digital Torque Wrench package includes the following items:
- Digital Torque Wrench Body (Model GM200-JP) x 1
- Protective Storage Case x 1
- AAA Batteries x 2
- Instruction Manual (Japanese) x 1
Image 3.1: Diagram showing the main parts and functions of the digital torque wrench.
Key Components:
- Ratcheting Head: Bidirectional, 72-tooth mechanism for tightening and loosening. Features a push-button for easy socket attachment and detachment.
- Digital Display: LCD screen showing torque values, measurement modes, and units.
- Control Buttons:
- UP/DOWN Buttons: Adjust target torque values and navigate menus.
- M (Mode) Button: Selects measurement modes (Track, Peak Hold, Preset) and saves data.
- U/S (Unit/Setting) Button: Switches between torque units (N.m, ft.lbf, in.lbf, kgf.cm) and enters setting mode.
- P/C (Power/Clear) Button: Powers the device ON/OFF and clears data.
- LED Indicator: Provides visual alerts for target torque status.
- Buzzer: Provides audible alerts for target torque status.
4. Setup
4.1 Battery Installation
- Locate the battery compartment at the base of the handle.
- Open the compartment cover.
- Insert two AAA batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
4.2 Initial Power On
- Press the P/C button to power on the device. The display will light up.
- The wrench will perform a self-check and display the current torque value and mode.
Video 4.1: Demonstration of powering on the digital torque wrench and setting torque values.
5. Operating Instructions
5.1 Setting Torque Values
- Press the UP/DOWN buttons to select a target torque value group (P1-P9).
- Press the M button to activate the selected group.
- Use the UP/DOWN buttons to adjust the specific torque value. Long-press for 2 seconds to enter rapid adjustment mode.
- Once the desired torque value is set, press the P/C button to confirm.
Video 5.1: Detailed guide on how to set torque values and use the digital torque wrench.
5.2 Selecting Measurement Modes
Press the M button to cycle through the three measurement modes:
- Track (T) Mode: Displays the real-time torque value as it is applied.
- Peak Hold (P) Mode: Captures and displays the maximum torque value applied during an operation.
- Preset (Pre) Mode: Allows setting a target torque value. The wrench will alert you when 80% of the target is reached (intermittent buzzer and flashing LED) and when the target is reached or exceeded (continuous buzzer and solid LED).
Image 5.2: Illustration of the three measurement modes: Track, Peak Hold, and Preset.
Image 5.3: Visual representation of the buzzer and LED alerts when approaching and reaching the target torque in Peak/Preset modes.
5.3 Switching Torque Units
Press the U/S button to cycle through the available torque units:
- N.m (Newton-meter)
- ft.lbf (Foot-pound force)
- in.lbf (Inch-pound force)
- kgf.cm (Kilogram-force centimeter)
Image 5.4: Display showing the four selectable torque units.
5.4 Attaching and Detaching Sockets
The wrench features a 1/2-inch drive ratcheting head with a push-button mechanism for secure socket attachment and easy release. Simply press the button to insert or remove a socket.
Image 5.5: Demonstration of the bidirectional ratcheting head and push-button socket release.
5.5 Data Recording and Retrieval
The wrench can store up to 999 torque measurement records.
- Saving Data: After a torque measurement, press the M button to save the reading.
- Retrieving Data: Long-press the M button to enter data retrieval mode. Use the UP/DOWN buttons to browse through saved records.
- Deleting Data: In data retrieval mode, press the U/S button to access deletion options ("ALL" for all data, "ONE" for individual records). Confirm deletion by pressing the M button. A "SUCC" message indicates successful deletion.
Video 5.6: Demonstration of data saving, retrieval, and deletion functions.
6. Maintenance
- Cleaning: Wipe the wrench with a soft, dry cloth after each use. Do not use abrasive cleaners or solvents.
- Storage: Store the wrench in its protective case in a dry, cool place, away from direct sunlight and extreme temperatures.
- Battery Replacement: Replace batteries when the low battery indicator appears on the display. Remove batteries if the wrench will not be used for an extended period.
- Calibration: Digital torque wrenches require periodic calibration to maintain accuracy. Refer to a professional calibration service for this procedure.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Wrench does not power on. | Low or dead batteries. Incorrect battery installation. | Replace batteries with new ones. Ensure batteries are inserted with correct polarity. |
| Inaccurate torque readings. | Wrench needs calibration. Damage from impact. | Contact a professional calibration service. Avoid dropping the wrench. |
| Display is dim or flickering. | Low battery power. | Replace batteries. |
| Buzzer/LED alerts not working. | Settings may be disabled or faulty. | Check settings in the manual. If problem persists, contact support. |
8. Specifications
| Feature | Detail |
|---|---|
| Model | GM200-JP |
| Measurement Range | 6-200 Nm |
| Drive Size | 1/2 inch |
| Accuracy | Clockwise: ±2%, Counter-clockwise: ±2.5% |
| Ratcheting Head | 72-tooth, Bidirectional |
| Measurement Modes | Track (T), Peak Hold (P), Preset (Pre) |
| Units | N.m, ft.lbf, in.lbf, kgf.cm |
| Data Storage | Up to 999 records |
| Display | Digital LCD with backlight |
| Power Source | 2 x AAA Batteries |
| Auto Power Off | After 2 minutes of inactivity |
| Material | Carbon Steel |
| Length | 53.5 cm |
| Weight (Package) | 1.8 kg |
Image 8.1: Detailed specifications table for various GOYOJO digital torque wrench models.
9. Warranty & Support
Your GOYOJO Digital Torque Wrench comes with a 1-year quality guarantee from the date of purchase. In the event of an initial defect, we offer free exchange or refund.
For any issues or inquiries during use, please contact our customer support with your order number and product model number. Our specialized staff will provide assistance.
For further support, you may visit the official GOYOJO Store on Amazon: GOYOJO Japan Store
