1. Introduction
The WISRETEC Digital Torque Meter is a high-precision instrument designed for accurate torque measurement in various applications, including automotive, bicycle, and machinery repair. It features a large digital display with backlight, two working modes (Trace and Peak), four selectable torque units, and an audible/visual alarm for preset torque values. This manual provides detailed instructions for the proper setup, operation, and maintenance of your digital torque meter.
2. Product Overview
2.1 Key Features
- High Precision: Achieves ±2% accuracy in clockwise direction and ±2.5% in counterclockwise direction.
- Digital Backlight Display: Large, easy-to-read display with backlight for clear visibility in various lighting conditions.
- Two Working Modes: Switch between "Trace" (real-time tracking) and "Peak" (maximum torque hold) modes.
- Four Torque Units: Easily switch between Kgf.cm, N.m, Ibf.ft, and Ibf.in.
- Audible and Visual Alarm: Buzzer and red LED light activate when a preset target torque value is reached.
- Data Storage: Capable of storing up to 999 sets of measurement data.
- Bidirectional Measurement: Supports torque measurement in both clockwise and counterclockwise directions.
- Automatic Shutdown: Powers off automatically after 60 seconds of inactivity to conserve battery life.
2.2 Package Contents
The standard package typically includes:
- WISRETEC Digital Torque Meter
- Protective Case
- Screwdriver (for battery compartment)
- Adapters (e.g., 1/2"(F)-1/4"(M), 1/2"(F)-3/8"(M) - may vary by model/kit)
2.3 Components and Display
Familiarize yourself with the main components and display elements of your digital torque meter:
- Display Screen: Shows torque value, unit, working mode (T/P), and data storage number.
- LED Light: Illuminates red when preset torque is reached.
- Buttons:
- ▲ (Increment Key): Increases preset torque value.
- ▼ (Decrement Key): Decreases preset torque value.
- PT (P/T Switch): Toggles between Peak (P) and Trace (T) modes.
- M (Memory): Accesses stored data.
- U (Unit Switch): Changes torque units.
- C (Power/Return): Powers the device on/off or returns to previous menu.
- Square Drive: Connects to ratchet wrenches or adapters.
3. Specifications
The WISRETEC Digital Torque Meter is available in several models, each with specific torque ranges and connection sizes:
| Parameter | Details |
|---|---|
| Models | TQA2-030, TQA2-135, TQA2-200, TQA2-340 |
| Battery Type | 3 x AAA batteries (not included) |
| Accuracy | Clockwise: ±2%, Counterclockwise: ±2.5% |
| Data Storage | 999 records |
| Torque Units | Kgf.cm, N.m, Ibf.ft, Ibf.in |
| Operating Modes | Peak (P) / Trace (T) |
| Operating Temperature | -20°C to 70°C (-4°F to 158°F) |
| Operating Humidity | 15-90% RH |
| Automatic Shutdown | 60 seconds |
| Material | Plastic |
| Color | Black |
Model-Specific Ranges and Connection Sizes:
| Model | Display Range (N.m) | Alarm Range (N.m) | Connection Head Size |
|---|---|---|---|
| TQA2-030 | 0.3 - 30 | 0.9 - 30 | 1/4 inch |
| TQA2-135 | 1.35 - 135 | 4 - 135 | 3/8 inch |
| TQA2-200 | 2 - 200 | 6 - 200 | 1/2 inch |
| TQA2-340 | 3.4 - 340 | 10 - 340 | 1/2 inch |
4. Setup
4.1 Battery Installation
The digital torque meter requires 3 AAA batteries (not included) for operation.
- Locate the battery compartment on the back of the device.
- Open the battery cover using the provided screwdriver if necessary.
- Insert 3 AAA batteries, ensuring correct polarity (+/-) as indicated inside the compartment.
- Close the battery cover securely.
4.2 Attaching to a Ratchet Wrench
The digital torque meter is designed to be used in conjunction with a standard ratchet wrench. It effectively converts your existing wrench into a digital torque wrench.
- Select a ratchet wrench with a square drive size compatible with your torque meter model (e.g., 1/4", 3/8", or 1/2").
- Insert the square drive of the torque meter into the square hole of the ratchet wrench.
- Ensure the connection is secure. If necessary, use appropriate adapters (e.g., 1/2" to 3/8" adapter) for compatibility.
Note: The ratchet wrench and any necessary adapters are typically purchased separately.
5. Operating Instructions
5.1 Power On/Off
- To power on, press the C button.
- To power off, press and hold the C button for a few seconds, or the device will automatically shut down after 60 seconds of inactivity.
5.2 Selecting Working Mode (Trace/Peak)
The torque meter offers two working modes:
- Trace (T) Mode: Displays real-time torque values as they are applied.
- Peak (P) Mode: Captures and displays the maximum torque value achieved during a measurement.
To switch between modes, press the PT button.
5.3 Selecting Torque Units
The device supports four common torque units:
- Kgf.cm
- N.m (Newton-meter)
- Ibf.ft (Pound-force foot)
- Ibf.in (Pound-force inch)
To cycle through the available units, press the U button.
5.4 Setting Target Torque and Alarm
You can set a target torque value, and the device will alert you when it's reached.
- While in a measurement mode, use the ▲ (Increment) and ▼ (Decrement) keys to adjust the preset target torque value.
- As you apply torque, when the measured value reaches the preset target, the buzzer will sound continuously, and the red LED light will illuminate.
5.5 Reading Torque Values
The large digital display shows the current or peak torque value, depending on the selected mode.
The backlight function ensures readability even in low-light conditions.
5.6 Data Storage
The device can store up to 999 sets of measurement data. Press the M button to access and review stored data. Refer to the on-screen prompts for navigation.
6. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Storage: Store the torque meter in its protective case in a dry, cool place when not in use. Remove batteries if storing for extended periods to prevent leakage.
- Avoid Impact: Protect the device from drops and strong impacts, as this can affect its accuracy and functionality.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Dead or incorrectly installed batteries. | Check battery polarity. Replace with fresh AAA batteries. |
| Inaccurate readings. | Device not properly calibrated (unlikely for new device) or damaged. | Ensure proper connection to the wrench. If issues persist, contact customer support. |
| Alarm not sounding/lighting up. | Target torque not set or reached. | Verify the target torque setting. Ensure the applied torque exceeds the set value. |
8. User Tips
- Always ensure the digital torque meter is securely attached to your ratchet wrench before use.
- For critical applications, perform a test measurement on a known fastener to confirm accuracy.
- When setting target torque, consider the material and specifications of the fastener to avoid over-tightening or damage.
- The device is suitable for a wide range of applications, but always use the correct model and torque range for the task at hand.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided with your purchase or contact the seller directly. Keep your proof of purchase for any warranty claims.
