1. Introduction

The HW300 PRO Coating Thickness Gauge is a precision instrument designed for non-destructive measurement of coating and paint thickness on various metal surfaces. It automatically detects the properties of the substrate, distinguishing between magnetic (Fe) and non-magnetic (NFE) materials. This device is an essential tool for material surface treatment, widely used in manufacturing, metal processing, chemical industry, commercial inspection, and automotive applications. Its portable design ensures stable performance in laboratories, workshops, and outdoor environments.

Key Features:

• Accurate Measurement: Provides precise paint thickness measurement results to help users determine the condition of the paint surface and identify areas requiring repair.
• Non-Destructive Testing: Utilizes non-invasive measurement methods, ensuring no damage to the paint surface and preserving the vehicle's appearance.
• Convenient and Fast: Quickly obtains measurement values, significantly improving work efficiency.
• Portable Design: Compact and easy to carry for on-site use.
• High Resolution: Ultra-precision resolution of 1µm for detailed readings.
• FE/NFE Measurement: Capable of measuring coatings on both magnetic (iron, steel) and non-magnetic (aluminum, copper) substrates.
• Backlight Display: Equipped with a backlight for improved visibility in various lighting conditions.
• Automatic Shutdown: Conserves battery life with an automatic shutdown function.
• Battery Level Indicator: Provides clear indication of remaining battery power.

2. Safety Information

• Always handle the device with care to prevent damage to the probe or internal components.
• Do not attempt to disassemble or modify the device, as this may void the warranty and cause malfunction.
• Keep the device away from extreme temperatures, humidity, and direct sunlight.
• Ensure batteries are inserted correctly according to polarity markings. Remove batteries if the device will not be used for an extended period.
• Dispose of used batteries and the device according to local environmental regulations.

3. Package Contents

Please check the package carefully to ensure all items are present:

• 1 x HW300 PRO Coating Thickness Gauge
• 1 x Instruction Manual
• 1 Set x Calibration Films (0.05mm, 0.10mm, 0.25mm, 0.50mm, 1.00mm, 2.00mm)
• 1 x Standard Aluminum Base Sheet

4. Product Overview

Familiarize yourself with the components and controls of your HW300 PRO Coating Thickness Gauge:

1. Probe Mode Indicator: Displays current mode (AUTO, F for magnetic induction, NFE for vortex).
2. Measurement Reading: Shows the current thickness measurement.
3. Statistical Display: Shows average (AVG), minimum (MIN), maximum (MAX), and number (NUM) of readings.
4. Automatic Shutdown Instruction: Indicates when auto-shutdown is active.
5. Low Power Indicator: Alerts when batteries are low.
6. Substrate Properties: Indicates if the substrate is magnetic (Fe: iron) or non-magnetic (NFE: non-iron).
7. Unit Switching: Displays current unit (µm micron, mm mm, Mill mils).
8. Up Key (Unit Switch): Used to change measurement units.
9. Right Key (Zero Calibration, Statistics): Used for zero calibration and switching between statistical values (average/minimum/maximum/number).
10. Down Key (Backlight, Auto Shutdown): Controls backlight and automatic shutdown function.
11. Left Key (Probe Mode, Clear Statistics): Switches probe modes and clears statistical data.
12. Power Button: Turns the device on/off.
13. Probe: The sensor that contacts the surface for measurement.

5. Specifications

6. Setup

6.1. Battery Installation

1. Locate the battery compartment on the back of the device.
2. Slide open the battery cover.
3. Insert two (2) 1.5V AAA batteries, ensuring correct polarity (+/-) as indicated inside the compartment.
4. Close the battery cover securely.

6.2. Power On/Off

• To power on the device, press and hold the Power Button (12) until the display illuminates.
• To power off the device, press and hold the Power Button (12) again until the display turns off. The device also features an automatic shutdown function to conserve battery life.

6.3. Initial Calibration (Zero Calibration)

For accurate measurements, it is recommended to perform a zero calibration before first use and periodically thereafter.

1. Ensure the device is powered on.
2. Place the probe (13) firmly and flatly on the bare metal (standard aluminum base sheet provided) surface.
3. Press the Right Key (9) to initiate zero calibration. The display should show '0.00' or a similar indication of successful calibration.
4. Repeat this process on both magnetic (Fe) and non-magnetic (NFE) base materials if you intend to measure both types of substrates.

7. Operating Instructions

7.1. Taking a Measurement

1. Power on the device.
2. Place the probe (13) perpendicular to the surface to be measured. Ensure firm and stable contact.
3. The measurement reading (2) will be displayed instantly. The device automatically detects the substrate type (Fe or NFE) and displays it (6).
4. Lift the device from the surface to take another measurement.

7.2. Switching Measurement Units

Press the Up Key (8) to cycle through available measurement units: micrometers (µm), millimeters (mm), and mils (mils).

7.3. Changing Probe Mode

Press the Left Key (11) to switch between probe modes: AUTO (automatic detection), F (magnetic induction for ferrous metals), and NFE (vortex for non-ferrous metals).

7.4. Backlight Control

Press the Down Key (10) to toggle the display backlight on or off.

7.5. Viewing Statistical Data

The device can display statistical data from multiple readings. Press the Right Key (9) repeatedly to cycle through Average (AVG), Minimum (MIN), Maximum (MAX), and Number of readings (NUM).

7.6. Clearing Statistics

To clear the accumulated statistical data, press and hold the Left Key (11) until the statistical values reset.

8. Maintenance

8.1. Cleaning

• Wipe the device body with a soft, dry cloth.
• Ensure the probe (13) is clean and free of dust, dirt, or paint residue before and after each use. Use a soft cloth; do not use abrasive materials or solvents.

8.2. Storage

• Store the device in a dry, cool place, away from direct sunlight and extreme temperatures.
• If storing for an extended period, remove the batteries to prevent leakage.

9. Troubleshooting

10. User Tips

• Consistent Placement: For best results, try to place the probe on the surface in the same manner each time – firmly and perpendicularly.
• Multiple Readings: Take several readings in different spots on the same area and use the statistical functions (AVG, MIN, MAX) to get a more reliable assessment of the coating thickness.
• Surface Preparation: Ensure the measurement surface is clean and dry, free from dust, dirt, or moisture, which can affect accuracy.
• Calibration Check: Periodically check calibration with the provided films to ensure continued accuracy, especially if you suspect inconsistent readings.
• Understanding Readings: A higher paint thickness on a vehicle might indicate previous repairs or repainting. Compare readings across different panels to identify inconsistencies.