Smart Sensor Digital Ultrasonic Thickness Gauge AS840 User Manual

1. Introduction

This manual provides comprehensive instructions for the operation, maintenance, and troubleshooting of the LINKANRUO Smart Sensor Digital Ultrasonic Thickness Gauge AS840. This device is designed for accurate measurement of material thickness using ultrasonic principles. It is suitable for materials that are good ultrasonic conductors, such as metal, plastic, ceramic, and glass, provided the measured part has two parallel surfaces.

2. Safety Information

Please read and understand all safety precautions before operating the device. Failure to follow these instructions may result in injury or damage to the instrument.

• Do not attempt to disassemble or modify the device.
• Keep the device away from water and excessive humidity.
• Avoid dropping the device or subjecting it to strong impacts.
• Use only the specified power source and accessories.
• Ensure proper contact between the probe and the material surface for accurate readings.

3. Product Overview

The AS840 Ultrasonic Thickness Gauge is a portable instrument featuring a 4-digital LCD display and intuitive controls.

Figure 3.1: AS840 Thickness Gauge, probe, and storage bag.

Figure 3.2: Front view of the AS840 device.

3.1 Key Features

Figure 3.3: Overview of AS840 key functions.

• 4-Digital LCD Display: Provides clear readings.
• Auto Calibration: Simplifies setup for accurate measurements.
• Sound Velocity Measurement: Ability to measure sound velocity.
• 12 Material Speed of Sound: Pre-programmed settings for various materials.
• Backlit Screen: Improves visibility in low-light conditions.
• Automatic Shut-down: Conserves battery life.
• Data Storage: For recording measurement results.
• Low Battery Prompt: Alerts user when battery is low.
• Linear Automatic Compensation: Enhances measurement accuracy.

3.2 Components

• Main Unit (AS840 Thickness Gauge)
• Ultrasonic Probe
• 4mm Calibration Block
• Storage Bag

4. Setup

1. Battery Installation: Open the battery compartment on the back of the device and insert the required batteries, observing polarity.
2. Probe Connection: Connect the ultrasonic probe to the designated ports on the top of the main unit. Ensure a secure connection.
3. Power On: Press the power button (usually marked with a power symbol) to turn on the device. The LCD display should illuminate.
4. Initial Calibration: Before first use or when changing materials, perform a calibration using the provided 4mm calibration block. Place the probe firmly on the block and follow the on-screen instructions or refer to the "Calibration" section in operating instructions.

5. Operating Instructions

5.1 Basic Measurement

1. Prepare Surface: Ensure the surface of the material to be measured is clean, smooth, and free of dust, rust, or paint. Apply a small amount of coupling gel (not included) to the surface where the probe will be placed.
2. Place Probe: Press the probe firmly and perpendicularly onto the prepared surface. Ensure good contact.
3. Read Measurement: The thickness reading will appear on the LCD display. Hold the probe steady until the reading stabilizes.
4. Remove Probe: Lift the probe from the surface. The last stable reading will typically remain on the display.

Figure 5.1: Examples of thickness measurements on various materials.

5.2 Sound Velocity Measurement

The device can measure the sound velocity of a material if its thickness is known.

1. Enter Known Thickness: Use the device's buttons (e.g., "VEL" or arrow keys) to navigate to the sound velocity measurement mode and input the known thickness of the material.
2. Perform Measurement: Place the probe on the material as described in Basic Measurement.
3. Read Sound Velocity: The device will calculate and display the sound velocity.

Measuring range for sound velocity: 1000 to 9999 m/s. Accuracy: +/-5% when given thickness > 20mm; +/-1mm/H*100% when given thickness < 20mm.

Figure 5.2: The AS840 is suitable for various materials.

5.3 Data Storage

To store a measurement, press the "STORE" button after a stable reading is obtained. Refer to the device's on-screen menu for recalling stored data.

6. Maintenance

• Cleaning: Wipe the device and probe with a soft, dry cloth after each use. Do not use abrasive cleaners or solvents.
• Storage: Store the device in its provided storage bag in a cool, dry place, away from direct sunlight and extreme temperatures.
• Battery Replacement: Replace batteries when the low battery indicator appears on the display. Remove batteries if the device will not be used for an extended period.
• Probe Care: Inspect the probe for wear or damage regularly. A damaged probe can affect measurement accuracy.

7. Troubleshooting

8. Specifications

9. Warranty and Support

This product comes with a standard manufacturer's warranty. For specific warranty terms and conditions, please refer to the documentation included with your purchase or contact LINKANRUO customer support.

For technical support, troubleshooting assistance, or spare parts, please contact your retailer or the manufacturer directly. Please have your product model number (AS840) and purchase date available when contacting support.

Manufacturer: LINKANRUO