1. Introduction
The Shahe AWM series mini digital torque wrench features a compact design, making it ideal for use in confined spaces. It offers powerful operating functions including torque setting, unit selection, numerical storage, data clearing, and numerical output. Designed for ease of use, it incorporates a digital display to simplify operation. This tool is primarily used for bolt fastening and control in the automotive and machinery industries, among other applications requiring precise torque measurement.
2. Functions and Features
- Large LCD screen with backlight function for clear visibility.
- High accuracy: ±2% for clockwise operation, ±2.5% for counterclockwise operation (applicable for 20% to 100% of full range).
- Supports both clockwise and counterclockwise operation.
- Audible buzzer and LED indicators trigger when a predetermined torque value is reached (available in peak mode).
- Four selectable engineering units: N.m, kgf.cm, lbf.ft, and lbf.in.
- Multiple measurement modes: Live-time mode, Peak mode, and Preset mode.
- Capable of storing up to 999 sets of measurement records.
- Automatic shutdown after 5 minutes of inactivity to conserve battery life.
- Powered by 2 AAA batteries (not included).
3. Product Components
- Quick release button
- Ratchet head (back of 1)
- Steering pad
- LED indicator
- LCD screen
- Up button
- Power / clear button
- Menu button
- Confirmation button
- Down button
- Grip
4. Setup
4.1 Battery Installation
The torque wrench requires 2 AAA batteries for operation. To install:
- Locate the battery compartment, typically on the handle or underside of the main body.
- Open the battery compartment cover.
- Insert 2 AAA batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
4.2 Power On/Off
Press the 'P/C' (Power/Clear) button to turn the device on. The LCD screen will illuminate. To turn off the device, press and hold the 'P/C' button until the screen turns off, or allow it to automatically shut down after 5 minutes of inactivity.
5. Operation
5.1 Unit Setting
To change the measurement unit (N.m, kgf.cm, lbf.ft, lbf.in), press the 'U/S' button. Each press will cycle through the available units, which will be displayed on the LCD screen.
5.2 Torque Setting
The torque wrench allows for setting a target torque value. Use the 'Up' and 'Down' buttons (labeled with arrows) to adjust the desired torque. The 'M' (Menu/Mode) button can be used to confirm the setting or switch between measurement modes (Live-time, Peak, Preset).
5.3 Measurement Modes
- Live-time Mode (T): Displays the current torque being applied in real-time.
- Peak Mode (P): Captures and displays the maximum torque applied during a measurement. In this mode, the buzzer and LED indicators will activate upon reaching the preset torque value.
- Preset Mode (Pre): Allows you to set a target torque value. The wrench will provide an indication (buzzer/LED) when this value is reached during tightening.
5.4 Using the Quick Release Button
The quick release button on the ratchet head allows for easy and rapid attachment or detachment of sockets and other accessories. Press the button to release the accessory, and ensure it clicks into place when attaching.
6. Specifications
| Feature | Model 10 | Model 30 | Model 60 | Model 100 |
|---|---|---|---|---|
| Minimum graduation value | 0.01 | 0.01 | 0.01 | 0.1 |
| Maximum operating range (N.m) | 10 N.m / 7.37 lbf.ft | 30 N.m / 22.12 lbf.ft | 60 N.m / 44.25 lbf.ft | 100 N.m / 73.7 lbf.ft |
| Maximum operating range (kgf.cm) | 88.50 lbf.in / 101.97 kgf.cm | 265.5 lbf.in / 305.9 kgf.cm | 531.04 lbf.in / 611 kgf.cm | 885.0 lbf.in / 1019 kgf.cm |
| Connector | 1/4 inches | 1/4 inches | 3/8 inches | 1/2 inches |
| Buzzer setting range (N.m) | 0.3-10 | 0.9-30 | 1.8-60 | 3-100 |
| Length (mm) | 230 | 240 | 240 | 285 |
| Accuracy | Clockwise: ±2%; Counterclockwise: ±2.5% | |||
| Data storage capacity | 999 | |||
| Operating mode | Peak mode (P) / Live-time mode (T) / Pre-set mode (Pre) | |||
| Unit | N.m, kgf.cm, lbf.ft, lbf.in | |||
| Ratchet head form | Bidirectional ratchet head | |||
| Ratchet teeth | 72 teeth | |||
| Button | 5 | |||
| Battery | 2 batteries NO.7 (AAA) | |||
| Operating temperature | -10°C ~ 60°C | |||
| Storage temperature | -20°C ~ 70°C | |||
| Test height of failing | 1m | |||
| Test conditions for vibration | 10G | |||
| Life Test | 10000 times | |||
7. Maintenance
- Cleaning: Wipe the wrench with a soft, dry cloth after each use. Do not use abrasive cleaners or solvents, as these can damage the display or finish.
- Storage: Store the torque wrench in its original protective case (Figure 7) in a dry, clean environment away from direct sunlight, extreme temperatures, and high humidity.
- Battery Care: Remove batteries if the wrench will not be used for an extended period to prevent leakage and damage.
- Calibration: For continued accuracy, periodic calibration by a qualified technician is recommended, especially after heavy use or impact.
8. Troubleshooting
8.1 Display Issues
- No display/Faint display: Check battery installation and replace with fresh AAA batteries if necessary. Ensure the battery compartment is closed securely.
- Incorrect readings: Ensure the correct unit is selected. If readings are consistently off, the wrench may require recalibration.
8.2 Functionality Issues
- Buttons unresponsive: Ensure the device is powered on. If batteries are low, replace them. If the issue persists, try removing and reinserting batteries to reset the device.
- Buzzer/LED not triggering: Verify that the wrench is in Peak mode if you expect these indicators to trigger at a preset torque. Check the preset torque value to ensure it is within the wrench's operating range.
9. User Tips
- Material Composition: The Shahe AWM Digital Torque Wrench is constructed from Chromium-vanadium Steel, known for its durability and strength, ensuring a long lifespan for the tool.
- Accuracy Check: While the wrench has high accuracy, for critical applications, it's good practice to perform a quick check against a known standard if available.
- Handle Grip: Always hold the wrench by the handle for consistent and accurate torque application. Avoid gripping the display area or the ratchet head during use.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided with your purchase or contact the manufacturer directly. Specific warranty terms and support procedures may vary.