1. Introduction
The MESTEK WM700 is a high-precision digital moisture meter designed for quick and accurate measurement of moisture content in various materials, including wood and building materials. It also features ambient temperature and humidity detection. With its high-sensitive probe and HD LCD display, it is an essential tool for professionals and DIY enthusiasts in construction, woodworking, and home inspection.
Figure 1: MESTEK WM700 Digital Wood Moisture Meter with key features highlighted.
2. Safety Information
- Always handle the device with care. The probes are sharp and can cause injury.
- Keep the device out of reach of children.
- Do not use the device in explosive atmospheres or near flammable liquids/gases.
- Do not attempt to modify or disassemble the device. Refer all servicing to qualified personnel.
- Ensure batteries are inserted with correct polarity. Remove batteries if the device will not be used for an extended period to prevent leakage.
- Avoid exposing the device to extreme temperatures, direct sunlight, or high humidity.
3. Product Overview & Components
The MESTEK WM700 features a robust design with an easy-to-read display and intuitive controls.
Figure 2: Function and panel description of the MESTEK WM700.
Device Components:
- Electrode Probe: For penetrating materials to measure moisture.
- Display Screen: HD LCD for clear readings.
- Electrode Protection Cap: Protects probes and serves as a datum test point.
- Power Switch (MODE button): Turns the device on/off and cycles through ambient temperature/humidity display.
- SET Key: Used for MAT range conversion and switching temperature units.
- Instrument Test Point MAT1: Located on the protective cap for accuracy verification.
Display Elements:
- 1. Range Indication (MAT): Shows the currently selected material group.
- 2. Temperature and Humidity Value: Displays ambient temperature and relative humidity.
- 3. Test Display Value: Shows the measured moisture content.
- 4. Battery Undervoltage Indication: Alerts when battery is low.
- 5. Temperature Measurement Unit: Indicates °C or °F.
- 6. Analog Value Display: Bar graph representation of moisture level.
- 7. Measurement Unit: Displays % for moisture.
4. Setup
4.1 Battery Installation
The MESTEK WM700 requires two (2) 1.5V AAA batteries (not included). To install:
- Locate the battery compartment on the back of the device.
- Open the battery compartment cover.
- Insert two AAA batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
4.2 Initial Power On
Press the MODE button to power on the device. The display will light up.
5. Operating Instructions
5.1 Testing Instrument Accuracy (Datum Detection)
It is recommended to periodically check the instrument's accuracy using the datum test point on the protective cap.
Video 1: Demonstration of datum detection for instrument accuracy.
Figure 3: Datum test point detection using the protective cap.
- Power on the device.
- Remove the protective cap.
- Insert the probes into the holes labeled 'T' and 'B' on the protective cap.
- Read the displayed value. For accurate instruments, the reading should be approximately T-52% / B-27% ±5%.
5.2 Measuring Wood Moisture
Video 2: Demonstration of measuring wood moisture.
Figure 4: Easily detecting object moisture in wood.
- Power on the device.
- Press the SET key to cycle through the MAT ranges until 'MAT1' (Wood) is selected.
- Carefully insert the probes into the wood surface. Ensure the probes penetrate sufficiently for an accurate reading.
- Read the moisture content displayed on the screen.
5.3 Measuring Building Material Moisture
Figure 5: Product test scenarios for various materials.
- Power on the device.
- Press the SET key to cycle through the MAT ranges to select the appropriate material group (e.g., MAT2 for building materials, MAT3 for anhydrous gypsum mortar, etc.). Refer to the 'Material Parameters' table below for specific ranges.
- Carefully insert the probes into the material surface.
- Read the moisture content displayed on the screen.
5.4 Ambient Temperature and Humidity Display
Video 3: Demonstration of ambient temperature and humidity display.
Figure 6: Ambient temperature and humidity display.
After powering on, short press the MODE button to cycle between moisture measurement and ambient temperature/humidity display. When ambient temperature/humidity is displayed, press the SET button to switch between Celsius (°C) and Fahrenheit (°F).
5.5 MAT Range Conversion
Video 4: Demonstration of MAT range conversion.
Press the SET key to cycle through the different material (MAT) ranges. Selecting the correct MAT range is crucial for accurate measurements for different materials.
5.6 Material Parameters
Figure 7: Material parameters table for accurate measurement.
| Range | Material | Moisture (%) |
|---|---|---|
| 1 | Beech, spruce, larch, birch, cherry, walnut | 8.8–54.8% |
| 2 | Oak, Pine, Maple, Ash, Douglas fir, Willow Eucalyptus | 7.0–47.9% |
| 3 | Cement mortar layer and concrete | 0.9–22.1% |
| 4 | Anhydrous gypsum mortar layer | 0.0–11.0% |
| 5 | Cement mortar | 0.7–8.6% |
| 6 | Limestone slurry and gypsum | 0.6–9.9% |
| 7 | Brick | 0.1–16.5% |
Warm reminder: The instrument will automatically power-off after about 10 minutes without any operation. Short press the power button to restart in automatic power-off mode.
6. Maintenance
- Cleaning: Clean the probes after each use to ensure accurate readings. Use a soft, dry cloth to clean the device body. Do not use abrasive cleaners or solvents.
- Storage: Store the device in a dry place with the protective cap on to prevent damage to the probes.
- Battery Care: If the device will not be used for an extended period, remove the batteries to prevent leakage and potential damage to the circuitry.
7. Troubleshooting
- No display/Device won't turn on: Check battery installation and charge. Replace batteries if necessary.
- Inaccurate readings: Ensure probes are clean and fully inserted into the material. Perform datum detection (Section 5.1) to verify instrument accuracy. Select the correct MAT range for the material being tested (Section 5.5).
- Automatic shutdown: The instrument is designed to automatically power-off after about 10 minutes of inactivity to save battery life. This is normal operation. Short press the power button to restart.
8. Specifications
Figure 8: Technical specifications of the MESTEK WM700.
| Parameter | Value |
|---|---|
| Protection level | IP20 |
| Electrode length | 10mm |
| Measuring range (Wood) | 1-75% |
| Measuring range (Building material) | 0.1-2.4% |
| Measuring range (Ambient temperature) | -10~60°C |
| Measuring range (Environmental relative humidity) | 0-100% |
| Resolution power | 0.1%, 0.1°C, 1%RH |
| Error (Moisture) | 1-75%±5% |
| Error (Ambient temperature) | 0~45°C±1%, -10~0°C, 45~60°C/±1.5% |
| Error (Ambient humidity) | 20~80%/±4.0%RH, 0~20%, 80~100%/±5.0%RH |
| Automatic shutdown | About 10 minutes later |
| Measuring rate | 0.5 second |
| Storage temperature | -10~60°C |
| Ambient temperature (Operating) | 0~40°C |
| Relative humidity of use environment | 0~85%RH |
| Power supply | 2x1.5V AAA battery (Not included) |
| Size | 147X42X25mm (including protective cap) |
| Weight | 90g (including protective cap) |
| Types of testable materials | More than 7 types |
9. User Tips
- For the most accurate readings, always ensure the probes are fully inserted into the material being tested.
- Periodically perform the datum detection (Section 5.1) to confirm the instrument's accuracy, especially before critical measurements.
- Always select the correct material type (MAT range) using the SET button to match the material you are measuring. Incorrect selection can lead to erroneous readings.
- When measuring wood, try to take readings from different spots to get a comprehensive understanding of the moisture distribution.
10. Warranty & Support
This product comes with a 3-month free maintenance period. For support, warranty claims, or any inquiries regarding the product, please contact the seller directly through the platform where the purchase was made. Please retain your proof of purchase for warranty purposes.
11. Packing List
The following items are included in your MESTEK WM700 package:
Figure 9: Contents of the MESTEK WM700 package.
- 1 x User Manual
- 1 x MESTEK WM700 Digital Wood Moisture Meter
- 1 x Packing Bag
- 1 x Retail Box
