RDINSCOS MT93 Rechargeable Pin-Type Moisture Meter User Manual

1. Introduction

The RDINSCOS MT93 is a rechargeable pin-type moisture meter designed for accurate detection of moisture content in various materials, including wood, walls, and other building materials. This device features a large color display, automatic alarm, calibration function, and a data hold function, making it suitable for home improvement, construction, and DIY projects.

Please read this manual thoroughly before operating the device to ensure proper use and to maximize its lifespan.

2. Safety Information

• Keep the device away from water and high humidity environments to prevent damage.
• The measurement pins are sharp. Handle with care to avoid injury. Keep out of reach of children.
• Do not attempt to disassemble or modify the device. Repairs should only be performed by qualified personnel.
• Ensure the device is fully charged before use for optimal performance.
• Avoid dropping the device or subjecting it to strong impacts.

3. Product Overview

3.1 Components

The MT93 moisture meter includes the main unit, a protective cap for the pins, and a USB charging cable.

Figure 1: RDINSCOS MT93 Moisture Meter and USB charging cable. The meter features a green and black casing with a large digital display and multiple function buttons.

3.2 Key Features

• Pin-Type Measurement: Utilizes sharp pins to penetrate materials up to 12mm deep for precise moisture detection.
• Large Color LCD Display: Provides clear and instant readings with color-coded indicators for moisture levels (Dry, Risk, Wet).
• Automatic Alarm: Alerts the user when moisture content exceeds a preset limit.
• Calibration Function: Allows for accurate calibration to ensure reliable measurements.
• HOLD Function: Freezes the current reading on the display for easy recording.
• Four Measurement Modes: Dedicated modes for Packing materials, Building materials, Soft Wood, and Hard Wood.
• Rechargeable Battery: Built-in rechargeable battery for convenience.
• Automatic Power Off: Device automatically turns off after 5 minutes of inactivity to conserve battery.

4. Setup

4.1 Charging the Device

1. Connect the included USB charging cable to the charging port on the device.
2. Plug the other end of the USB cable into a standard USB power adapter (not included) or a computer USB port.
3. The battery indicator on the display will show charging status. Charge until the battery icon indicates full.

4.2 Installing/Replacing Pins

The MT93 comes with pre-installed pins and includes two additional replacement pins. Use the small tool provided to carefully unscrew and replace pins if they become damaged or worn.

• Ensure the device is powered off.
• Carefully remove the protective cap from the pins.
• Use the small tool to unscrew the existing pins.
• Insert new pins and screw them in securely.
• Replace the protective cap when not in use.

5. Operation

5.1 Power On/Off

• To power on, press the Power button () once. The display will light up.
• To power off, press and hold the Power button for a few seconds. The device will also automatically power off after 5 minutes of inactivity.

Figure 2: The MT93 moisture meter features an auto-off function after 5 minutes of inactivity to save battery.

5.2 Mode Selection

The MT93 offers four distinct measurement modes for different material types. Press the corresponding button to select the desired mode:

• PACKING Mode: For easily absorbent packing materials like corrugated paper and cloth bags.
• BUILDING Mode: For building materials such as cement and plaster.
• SOFT WOOD Mode: For low-density wood types.
• HARD WOOD Mode: For higher-density wood types.

Figure 3: The MT93 offers four distinct measurement modes for various materials, including packing, building, soft wood, and hard wood.

Figure 4: Visual representation of the four mode switching options on the MT93 moisture meter.

5.3 Taking Measurements

1. Remove the protective cap from the pins.
2. Select the appropriate measurement mode for your material (e.g., Soft Wood, Hard Wood, Building, Packing).
3. Firmly push the two pins into the material you wish to measure. For wood, ensure pins are inserted along the grain and deep enough to get an accurate reading, ideally at least 5cm from the edge. The pins can measure moisture content up to 12mm deep.
4. Read the moisture content percentage displayed on the screen. The color bar indicator will also show the moisture level (Dry, Risk, Wet).
5. If the reading is "Lo", the material under test is dry.
6. After measurement, carefully withdraw the pins and replace the protective cap.

Figure 5: Measuring wood moisture content with the MT93. The display shows 14.8% in Soft Wood mode, with an alarm sound icon indicating a high moisture level.

Figure 6: Illustration of the MT93 measuring moisture depth. The diagram shows how moisture content varies at different depths, and indicates that "Lo" on the screen means the material is dry.

5.4 HOLD Function

To freeze the current reading on the display, press the HOLD button once. Press it again to release the hold and resume live readings.

Figure 7: The HOLD function allows you to freeze the measurement on the screen for convenient viewing.

5.5 Automatic Alarm

The device features an automatic alarm that activates when the detected moisture content exceeds predefined thresholds for each material type. The display will also show a "WET" indicator and an audible alert may sound.

Figure 8: This table outlines the moisture level thresholds for Dry, Risk, and Wet categories across different material modes, triggering audible and visual alarms.

Figure 9: The alarm prompt icon indicates when moisture levels exceed safe thresholds.

5.6 Calibration

Regular calibration ensures the accuracy of your moisture meter. The MT93 has a self-test function and a manual calibration method.

1. Self-Test: The device performs a self-test upon startup. If the self-test result is not within the expected range (e.g., 21.3%~22.3% for Packing mode), manual calibration is required.
2. Manual Calibration Method:
   1. Select "Packing Mode".
   2. Press and hold the "HOLD" button for 5 seconds. The screen will display "CAL".
   3. Insert the pins into the designated holes on the protective cap.
   4. The device will calibrate itself.

Figure 10: Illustration of the self-test function and manual calibration process for the MT93 moisture meter. The image shows the expected self-test range and the steps for manual calibration using the protective cap.

6. Maintenance

• Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Storage: Store the meter in a cool, dry place with the protective cap on the pins. Avoid extreme temperatures and direct sunlight.
• Battery: Recharge the battery regularly, even if the device is not used frequently, to maintain battery health.
• Pin Replacement: Replace pins if they become bent, dull, or corroded to ensure accurate readings.

7. Troubleshooting

This section addresses common questions and issues you might encounter with your moisture meter.

7.1 Frequently Asked Questions

• Q: Why do the pin readings look different from pinless meters?

  A: Pin meters measure moisture at a specific spot by touching the material and penetrating its surface. Pinless meters scan the surface quickly to give a reference value without penetration. The MT93 is a pin-type meter.

• Q: Is this as precise as a laboratory meter?

  A: This tool is designed for home inspection, woodworking, and construction use with an accuracy of ±2.5%. It is not intended for laboratory testing, which typically requires higher precision instruments.

• Q: The meter reads "0.00%" or "Lo" even when I expect moisture.

  A: Ensure the pins are fully inserted into the material. For wood, ensure the pins are oriented along the wood grain. If the material is very dry, "Lo" is the correct reading. If you suspect a malfunction, try calibrating the device as described in Section 5.6.

• Q: The alarm sounds frequently.

  A: The alarm indicates that the moisture content exceeds the preset limit for the selected material mode. Refer to the moisture level table in Section 5.5 to understand the thresholds. If the alarm is unexpected, verify the material type and selected mode.

8. Specifications

9. Warranty and Support

RDINSCOS is committed to providing high-quality products and customer satisfaction. For any questions, technical support, or warranty claims, please contact our customer service team.

The product is backed by a replacement guarantee and friendly support. Please refer to your purchase documentation for specific warranty terms and contact information.

Figure 11: For assistance, please contact customer support. The image shows a graphic encouraging users to reach out for help.