1. Introduction
Thank you for choosing the Mestek Digital Wood Moisture Meter WM700A. This device is a high-precision, non-contact induction moisture meter designed to detect moisture content in various materials such as softwood, hardwood, gypsum wall, and brick wall. It features a VA full viewing angle reverse display color screen for easy reading, ambient temperature and humidity measurement, and an over-range alarm function. This manual provides detailed instructions for safe and effective use of your moisture meter.
2. Safety Information
Please read all safety warnings and instructions carefully before using the device to ensure safe operation and to prevent damage to the meter. Keep this manual for future reference.
- Do not attempt to disassemble or modify the device.
- Keep the device away from water and high humidity environments to prevent damage.
- Avoid exposing the device to extreme temperatures or direct sunlight for prolonged periods.
- Remove batteries if the device will not be used for an extended period to prevent battery leakage.
- Use only the specified battery type (1.5V X 3AAA).
3. Key Features
- Pinless, Non-Contact Induction Measurement: Allows for non-destructive moisture detection.
- High-precision Electromagnetic Wave Sensor: Ensures accurate readings.
- VA Full Viewing Angle Reverse Display Color Screen: High-definition digital and analog dual display for clear visibility.
- Four Measurement Modes: Dedicated modes for Drywall, Masonry, Softwood, and Hardwood.
- Ambient Temperature and Humidity Measurement: Automatically measures current ambient conditions.
- Over-range Alarm: Buzzer warning when moisture levels exceed predefined thresholds.
- Celsius/Fahrenheit Switch: Easily switch between temperature units.
- Zero Calibration: Button for calibration to ensure accuracy.
- Automatic Shut-down: Powers off after 10 minutes of inactivity to save battery.
4. Product Components
Familiarize yourself with the parts of your Mestek WM700A moisture meter:
- Display Screen: Shows moisture readings, temperature, humidity, and selected mode.
- Power Button: Turns the device on/off.
- HOLD Button: Freezes the current reading on the display.
- ZERO Button: Used for calibration.
- SEL Button: Selects measurement material (Drywall, Masonry, Softwood, Hardwood).
- °C/°F Button: Switches between Celsius and Fahrenheit temperature units.
- Moisture Sensor: Located on the back, used for non-contact measurement.
- Temperature and Humidity Sensing Area: Measures ambient conditions.
- Battery Cover: Located on the back for battery installation.
5. Setup
5.1 Battery Installation
The device requires 3 AAA 1.5V batteries (not included).
- Locate the battery cover on the back of the device.
- Slide open the battery cover.
- Insert 3 AAA 1.5V batteries, ensuring correct polarity (+/-).
- Close the battery cover securely.
6. Operating Instructions
6.1 Power On/Off
- Press the Power button (
) to turn the device on. - Press and hold the Power button to turn the device off.
- The device will automatically shut down after 10 minutes of inactivity.
6.2 Material Selection
The WM700A supports four measurement modes:
- Drywall
- Masonry
- Softwood
- Hardwood
Press the SEL button to cycle through the available material types until the desired mode is displayed on the screen.
6.3 Taking a Measurement
To take a measurement:
- Ensure the device is powered on and the correct material type is selected.
- Place the back of the moisture meter (where the electromagnetic wave sensor is located) flat against the surface of the object to be measured.
- Ensure the thickness of the measured object is greater than 20mm, and the area is greater than 40x40mm for accurate readings.
- The moisture content will be displayed on the screen.
6.4 Data Hold Function
Press the HOLD button to freeze the current measurement on the display. Press it again to release the hold and resume live readings.
6.5 Zero Calibration
The device has a zero calibration button. To calibrate, ensure the meter is not in contact with any material and press the ZERO button. This helps maintain measurement accuracy.
6.6 Temperature Unit Switch
Press the °C/°F button to switch the ambient temperature display between Celsius and Fahrenheit.
6.7 Over-range Alarm
The device features an over-range alarm that provides a buzzer warning when moisture levels exceed certain thresholds:
- When the value is > 70% for drywall and masonry, a buzzer warning will sound.
- When the value is > 17% for softwood and hardwood, a buzzer warning will sound.
7. Measurement Modes and Ranges
The WM700A provides specific measurement ranges and indications for different materials:
| Material Type | Measuring Range | Display Indication |
|---|---|---|
| Softwood | 0% ~ 55% | Green: 5%~14%, Yellow: 15%~17%, Red: 17%+ |
| Hardwood | 0% ~ 35% | Green: 5%~14%, Yellow: 15%~17%, Red: 17%+ |
| Gypsum Board / Masonry | Relative values | Green: 0%~30%, Yellow: 31%~70%, Red: 70%+ |
8. User Tips
- Pipe Detection: This device indicates moisture levels within a wall but does not locate water pipes directly. It can help identify areas of moisture that might suggest a pipe burst, but it's not a pipe finder.
- Material Compatibility: The WM700A is designed for wood (softwood, hardwood), drywall, and masonry. It may not provide accurate readings for other materials like sand, earth, or concrete, as these are not specified in its measurement modes.
- Optimal Measurement: For best results, ensure the sensor area is fully in contact with the surface and the material meets the minimum thickness and area requirements (thickness > 20mm, area > 40x40mm).
9. Maintenance
- Cleaning: Wipe the device with a dry, soft cloth. Do not use abrasive cleaners or solvents.
- Storage: Store the device in a cool, dry place, away from direct sunlight and extreme temperatures.
- Battery Care: If the device is not used for a long period, remove the batteries to prevent leakage and damage.
10. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | Low or dead batteries; Incorrect battery installation | Replace batteries; Check battery polarity |
| Inaccurate readings | Incorrect material selection; Sensor not fully in contact; Needs calibration | Select correct material; Ensure full sensor contact; Perform zero calibration |
| Buzzer alarm sounds frequently | High moisture content detected | This indicates high moisture. Verify the material and take appropriate action. |
11. Specifications
| Parameter | Value |
|---|---|
| Product Name | Non-destructive induction moisture meter |
| Model Number | WM700A |
| Display Type | DIGITAL (VA reverse display color screen) |
| Measuring Range (Softwood) | 0%~55% |
| Measuring Range (Hardwood) | 0%~35% |
| Precision (Softwood, Hardwood) | ±4% |
| Detection Thickness | 4/3 inch (20mm) |
| Automatic Shut-down | 10 minutes |
| Battery | 1.5V X 3AAA |
| Working Current | 35mA |
| Operating Temperature | 0~40°C |
| Working Humidity | 0%~70% |
| Storage Environment | -10~50°C (5%~95%RH) |
| Product Size | 132*73*33mm |
| Weight | 150g |
| Certification | CE |
12. Video Demonstration
Watch this video for a visual guide on how to use the Mestek WM700A moisture meter to detect moisture in walls and other materials.
13. Warranty and Support
The Mestek Digital Wood Moisture Meter WM700A is manufactured to high-quality standards. For any technical support or warranty inquiries, please contact the MESTEK Official Store where you purchased the product. Please retain your proof of purchase for warranty claims.
