GVDA Digital Brake Oil Tester GD182 User Manual

1. Safety Warnings

Please read this instruction manual carefully before use and strictly observe the safety rules and the caution, attention and warnings listed in this instruction manual.

• The protection provided by the detector can be affected and disabled unless you operate it according to the instructions.
• Do not use the detector if the screen does not display.
• Do not use the detector if it is damaged or does not work properly.
• Check the probe for dirt, cracks, or breaks before using. If you suspect there is a problem, send it for repair.
• The test results of the detector are for reference only. The company does not assume any liability for personal and property losses caused by the customer using the test pen for final decision.
• When using the detector to test the liquid, the metal part of the detector probe must be completely immersed in the liquid.
• Comply with local and national safety regulations and use appropriate protective equipment as required by local or national authorities.

2. Product Overview

The GVDA GD182 is a digital brake oil moisture detector designed to quickly and accurately assess the water content in DOT3, DOT4, and DOT5.1 brake fluids. It features a flexible probe, a multi-color backlight display, and sound/light alarms for easy interpretation of results.

2.1 Meter Structure

1. Probe: The sensing element that is immersed in the brake fluid.
2. Free Pole: The flexible neck of the probe.
3. Lighting: Integrated flashlight for dark conditions.
4. Display: LCD screen showing moisture percentage and status.
5. Function key (F): Used to select brake oil type.
6. Hold/Light key (H/🔆): Used to hold data or activate the flashlight.
7. Power key (⑉): Used to turn the device on/off.

2.2 Key Features

• Brake Oil Moisture Detection
• Data hold function
• Low battery indication
• Automatic power off
• Integrated flashlight
• Three-color backlight display
• Buzzer alarm

3. Setup

3.1 Battery Installation

1. Unscrew the battery cover screw.
2. Open the battery cover.
3. Remove any old batteries.
4. Install two new 1.5V AAA batteries according to the positive and negative instructions inside the compartment.
5. Close the battery cover and secure the screw.

Note: Batteries are not included with the device.

4. Operating Instructions

4.1 Power On/Off

• Turn On: Hold down the power key (⑉) for more than 1 second. After the buzzer beeps, the screen lights up and enters the test state.
• Turn Off: Press the power key (⑉) to shut down the machine when the detector is on.

4.2 Function Key (Brake Oil Type Selection)

The default brake oil type detected by the detection pen is DOT3.

• Press the function key (F) for the first time to switch to DOT4.
• Press again to switch to DOT5.1.
• Press a third time to cycle back to DOT3.

4.3 Moisture Detection

1. After startup, select the correct brake oil type to be tested using the function key.
2. Make sure the probe is clean before testing.
3. Dip the metal part of the detection head into the tested liquid for 3 seconds, until the display is stable.
4. Observe the state and read the numerical value on the display.

4.3.1 Interpretation of Results (Three-Color Backlight Display)

• 0%~2% (Green Backlight): The brake oil can still be used.
• 2%~3% (Yellow Backlight & Slow Buzzer): Please change the brake oil.
• >3% (Red Backlight & Quick Buzzer): Change the brake oil immediately.

4.3.2 Sound and Light Alarm

When the moisture value is over 2%, the display will turn yellow or red, and the buzzer will activate, indicating a need for brake oil change.

4.4 Data Hold

When measuring, press the Hold/Light key (H/🔆). The displayed data will be held. Press the key again to release the hold data.

4.5 Flashlight

Long press the Hold/Light key (H/🔆) to turn on the flashlight. Press again to turn it off. This is convenient for use in dark conditions.

4.6 Auto Power Off

If no concentration is measured within 5 minutes, the meter will automatically power off to extend battery life.

4.7 Video Demonstration

5. Maintenance

5.1 Cleaning the Probe

Warning: Be sure to protect the detection head. If the metal probe is corroded, scratched, or oxidized, the detection accuracy may be affected.

After testing the liquid, please clean the detection head first. Otherwise, the test result may be affected.

1. Clean the detector by wiping it with a wet cloth.
2. After cleaning, the test pen must be completely dry before use.

5.2 Low Battery Indication

When the battery voltage is lower than 2.6V, the screen will display a battery icon (☒). When the battery voltage is lower than 2.4V, the detector will automatically power off. Please change the batteries promptly.

5.3 Battery Replacement

Refer to section 3.1 Battery Installation for detailed steps on replacing the batteries.

6. Specifications

7. Troubleshooting

• Device does not turn on: Check if batteries are installed correctly and have sufficient charge. Replace batteries if necessary.
• Inaccurate readings: Ensure the probe is clean and fully immersed in the brake fluid. Verify that the correct brake fluid type (DOT3, DOT4, or DOT5.1) is selected. Check the probe for any damage or corrosion.
• No backlight or buzzer: If the device is on but these features are not working, check battery level. If the issue persists, the device may be faulty.
• Auto power off too soon: The device has an auto-off feature after 5 minutes of inactivity to save battery. This is normal operation.

8. User Tips

• Always ensure the probe is completely dry before and after each use to prevent contamination and ensure accurate readings.
• Test brake fluid regularly, especially before long trips or during routine vehicle maintenance.
• Keep the device stored in a dry, cool place away from direct sunlight and extreme temperatures.
• For best results, test brake fluid when the engine is cool.

9. Warranty and Support

For detailed warranty information, technical support, or service inquiries, please refer to the official user manual PDF available at this link or contact GVDA customer service.