1. Product Overview
The PETSTIBLE CNBJ-611 Automotive Circuit Tester is designed for accurate current measurement within standard blade-type fuse boxes. This device is suitable for fault detection in automotive and commercial vehicle electrical circuits, offering fast measurement speed, high accuracy, and ease of use.
Key Features:
- LCD Screen: Equipped with a blue backlight for clear viewing of measurement data in various lighting conditions, including low-light environments.
- Headlight: Integrated front lighting assists with inspection and maintenance in dark areas, also serving as a convenient work light.
- Design: Features an advanced visual design for a simple, dynamic, and colorful aesthetic.
Figure 1: PETSTIBLE CNBJ-611 Automotive Circuit Tester with its fuse adapter.
2. Safety Information
Please read and understand all safety instructions before operating this device. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always turn off the vehicle's ignition before connecting or disconnecting the tester.
- Ensure the tester's fuse rating (20A/48V) is appropriate for the circuit being tested.
- Do not use the tester if it appears damaged.
- Keep the device away from water and other liquids.
- Only use the specified battery type for replacement.
3. Package Contents
Verify that all items are present in the package:
- 1x PETSTIBLE CNBJ-611 Automotive Circuit Tester
4. Setup
4.1 Battery Installation
The CNBJ-611 tester requires one 23A 12V battery. If the battery symbol appears on the display, the battery is low and requires replacement.
- Ensure the tester is turned off and disconnected from any circuit.
- Locate the battery compartment on the back of the main unit.
- Carefully remove the battery cover.
- Insert one 23A 12V battery, observing the correct polarity (+/-).
- Replace the battery cover securely.
Figure 2: Rear view of the tester with the battery compartment open.
5. Operating Instructions
Follow these steps to measure current using the CNBJ-611 Automotive Circuit Tester:
- Turn off the vehicle's ignition switch.
- Prepare the Fuse: Remove the blade-type fuse from the circuit you intend to test in the vehicle's fuse box. Insert the tester's fuse (standard 20A/48V) into the electrical outlet on the tester's adapter to ensure the correct circuit protection level.
- Connect the Tester: Insert the tester's adapter (select medium or small depending on the size of the blade fuse; if it's a small size, connect the small to the medium) into the vehicle's fuse socket where you removed the original fuse.
- Power On: If necessary, turn on the vehicle's ignition to energize the circuit. Then, press the power button on the tester to turn it on.
- Read Measurement: The LCD display will show the measured current of the circuit under test.
- Interpret Display:
- When the display shows "DC", the circuit under test is drawing positive current.
- When it shows "C", the circuit under test is drawing negative current.
- Turn Off: After the measurement is complete, press the power button again to turn off the tester.
6. Maintenance
6.1 Battery Replacement
Refer to Section 4.1 for detailed instructions on battery replacement when the low battery symbol appears on the display.
6.2 Cleaning
To clean the device, wipe it with a soft, dry cloth. Do not use abrasive cleaners or solvents. Ensure the device is turned off and disconnected from any power source before cleaning.
7. Specifications
| Part Name | Automotive Circuit Tester |
|---|---|
| Model | CNBJ-611 |
| Main Body Size | 110 x 45 x 30 mm |
| Fuse Type | Standard Blade Fuse |
| Color | Sapphire Blue |
| Material | ABS/PC Body |
| Display | LCD with Blue Backlight |
| Lighting | Front Lighting (Headlight) |
| Battery Type | 1x 23A 12V Battery |
| Measuring Range | 0.01A - 19.99A |
| Maximum Load | 20A/48V (DC) for 10 seconds |
| Current Accuracy | ±2% |
| Operating Environment | 0°C - 40°C, Relative Humidity ≤75% |
| Storage Environment | -10°C - 50°C, Relative Humidity ≤80% |
Figure 3: Product dimensions of the CNBJ-611 tester.
8. Troubleshooting
If you encounter issues with your CNBJ-611 Automotive Circuit Tester, refer to the following common problems and solutions:
- Tester does not turn on:
- Check if the battery is installed correctly with the right polarity.
- Replace the battery if it is low or depleted (refer to Section 4.1).
- Ensure the power button is pressed firmly.
- No reading on display:
- Verify that the vehicle's ignition is on and the circuit is energized.
- Ensure the tester's fuse adapter is securely inserted into the vehicle's fuse socket.
- Confirm that the circuit you are testing is drawing current.
- Inaccurate readings:
- Ensure the tester's fuse is correctly seated in its adapter.
- Check for any loose connections.
- Verify that the tester's specifications match the requirements of the circuit being tested.
9. Warranty and Support
For warranty information or technical support, please contact PETSTIBLE customer service through the retailer where the product was purchased. Please have your product model number (CNBJ-611) and purchase details ready when contacting support.
