GVDA GD182 Digital Brake Fluid Liquid Tester

1. Introduction

The GVDA GD182 is a digital brake fluid liquid tester designed to accurately measure the moisture content in various types of brake fluid, including DOT3, DOT4, and DOT5.1. Regular testing of brake fluid is crucial for vehicle safety, as excessive moisture can lead to reduced braking performance and corrosion of brake system components. This manual provides detailed instructions for the safe and effective use of your GD182 tester.

Figure 1: GVDA GD182 Digital Brake Fluid Liquid Tester

2. Safety Information

Please read all safety warnings and instructions carefully before use to prevent injury or damage to the device.

• Always read the instruction manual carefully before use and strictly observe all safety rules, cautions, and warnings.
• The protection provided by the detector can be affected or disabled if not operated according to these instructions.
• Do not use the detector if the screen does not display any information.
• Do not use the detector if it is damaged or does not work properly.
• Before each use, check the probe for dirt, cracks, or breaks. If you suspect a problem, send it for repair.
• Comply with all local and national safety regulations and use appropriate personal protective equipment (e.g., gloves, eye protection) as required.
• Protect the detection head. If the metal probe is corroded, scratched, or oxidized, the detection accuracy may be compromised.

3. Package Contents

Please check the package for the following items:

• GVDA GD182 Brake Fluid Liquid Tester
• Instruction Manual
• Gift Box

Figure 2: Contents of the package

4. Product Overview

4.1 Meter Structure

Familiarize yourself with the components of your GD182 tester:

1. Probe
2. Free Pole
3. Lighting
4. Display
5. Function Key
6. Hold/Light Key
7. Power Key

Figure 3: Meter Structure Diagram

5. Setup

5.1 Battery Installation

The GD182 tester requires 2 x 1.5V AAA batteries (not included).

1. Locate the battery cover on the back of the device.
2. Unscrew the battery cover screw and open the battery cover.
3. Remove any old batteries if present.
4. Insert two new AAA batteries, ensuring correct polarity (+/-) as indicated inside the battery compartment.
5. Replace the battery cover and secure it with the screw.

6. Operating Instructions

6.1 Power On/Off

• To Turn On: Hold down the Power Key (7) for more than 1 second. After the buzzer beeps, the screen will light up, and the device will enter the test state.
• To Turn Off: Press the Power Key (7) briefly when the detector is on.

6.2 Selecting Brake Fluid Type (Function Key)

The default brake fluid type is DOT3 upon power-on.

• Press the Function Key (5) once to switch from DOT3 to DOT4.
• Press the Function Key (5) again to switch from DOT4 to DOT5.1.
• Press the Function Key (5) a third time to cycle back to DOT3.

Figure 4: Brake Fluid Type Detection

6.3 Moisture Detection Procedure

1. Ensure the probe (1) is clean before testing.
2. Select the correct brake fluid type (DOT3, DOT4, or DOT5.1) using the Function Key (5).
3. Carefully dip the metal part of the probe (1) into the brake fluid reservoir. Ensure the metal part of the probe is completely immersed in the liquid.
4. Hold the probe in the liquid for approximately 3 seconds, or until the display (4) stabilizes.
5. Observe the display and read the numerical value.
6. After testing, clean the probe thoroughly (refer to Maintenance section).

Figure 5: Tester in use

6.4 Interpreting Results (Three-Color Backlight Display)

The GD182 provides clear visual and audible indications of moisture content:

• 0% - 2% Moisture: The display backlight will be bright green. This indicates the brake fluid is in good condition and can still be used.
• 2% - 3% Moisture: The display backlight will be yellow, and the buzzer will buzz slowly. This indicates that the brake fluid is starting to degrade and should be changed soon.
• Greater than 3% Moisture: The display backlight will be bright red, and the buzzer will buzz quickly. This indicates that the brake fluid is severely contaminated and must be changed immediately for safety.

Figure 6: Three-Color Backlight Display

Figure 7: Sound and Light Alarm

6.5 Data Hold

• During measurement, press the Hold/Light Key (6) briefly to freeze the current reading on the display.
• Press the Hold/Light Key (6) again to release the held data and resume live readings.

6.6 Lighting

• During measurement, long-press the Hold/Light Key (6) to turn on the built-in lighting (3).
• Long-press the Hold/Light Key (6) again to turn off the lighting.

7. Maintenance

7.1 Cleaning

• After each use, it is crucial to clean the detection head (probe) immediately. Failure to do so may affect the accuracy of subsequent test results.
• Clean the probe with a soft, damp cloth.
• Important: Ensure the probe is completely dry before storing the device or performing another test.

8. Troubleshooting

8.1 Low Battery Indication

• When the battery voltage drops below 2.6V, a low battery icon will appear on the screen.
• If the battery voltage drops below 2.4V, the detector will automatically power off.
• Replace the batteries promptly when the low battery indicator appears to ensure accurate readings and continuous operation.

8.2 Auto Power Off

• The device features an auto power-off function to conserve battery life. If no concentration is measured for 5 minutes, the meter will automatically shut down.
• To resume operation, simply turn the device back on.

8.3 Screen Not Displaying / Device Not Working

• Check if the batteries are correctly installed and have sufficient charge. Replace if necessary.
• Ensure the power button is pressed correctly.
• If the device is damaged or not functioning as expected, do not attempt to repair it yourself. Contact customer support.

9. Specifications

10. User Tips

• Regularly check your brake fluid, especially before long trips or during routine vehicle maintenance.
• A reading below 1% moisture content is generally considered very good, providing peace of mind for safe driving.
• Always ensure the probe is fully immersed in the brake fluid for an accurate reading.
• Keep the tester clean and dry when not in use to prolong its lifespan and maintain accuracy.

11. Warranty and Support

Your GVDA GD182 Digital Brake Fluid Liquid Tester is covered by a manufacturer's warranty. For specific warranty terms and conditions, please refer to the product packaging or contact your point of purchase.

If you encounter any issues or have questions regarding the operation or maintenance of your device, please contact the seller or GVDA customer support for assistance.