1. Introduction
The MESTEK WM700 is a versatile digital moisture meter designed for accurately measuring the moisture content of various materials, including wood, paper, and building materials like concrete, lime mortar, and brick. Featuring a high-sensitive probe, HD LCD display with backlight, and a durable double injection molded body, this instrument provides instant, efficient, and professional moisture detection.
This manual provides detailed instructions for the safe and effective use of your MESTEK WM700 moisture meter. Please read it thoroughly before operation and keep it for future reference.
2. Safety Information
- Always handle the device with care. The probes are sharp and can cause injury.
- Do not attempt to measure live electrical circuits.
- Keep the device away from water and extreme temperatures.
- Ensure batteries are inserted correctly according to polarity markings.
- Remove batteries if the device will not be used for an extended period.
- Do not disassemble or modify the instrument. Repairs should only be performed by qualified personnel.
3. Package Contents
Upon opening your MESTEK WM700 package, please verify that all items listed below are present and in good condition:
- 1 x MESTEK WM700 Moisture Meter
- 1 x User Manual
- 1 x Packing Bag
- 1 x Box
Figure 3.1: MESTEK WM700 Packing List
4. Product Overview
The MESTEK WM700 features a user-friendly design with a clear LCD display and intuitive controls. The device is constructed with double injection molding for a comfortable grip and enhanced durability, making it wear-resistant and drop-proof.
Figure 4.1: MESTEK WM700 Moisture Meter
Figure 4.2: Function and Panel Description
4.1 Key Components:
- Electrode Probe: Two high-strength 303 stainless steel pins for material penetration.
- Display Screen: HD LCD with backlight for clear readings in various environments.
- Electrode Protection Cap: Covers the probes when not in use and includes 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 between Celsius/Fahrenheit.
4.2 LCD Display Indicators:
- Range indication (MAT 1, MAT 2, etc.)
- Temperature and humidity value
- Test display value (moisture content)
- Battery undervoltage indication
- Temperature measurement unit (°C/°F)
- Analog value display (bar graph)
- Measurement unit (%)
5. Specifications
The following table details the technical specifications of the MESTEK WM700 Moisture Meter:
| Attribute | 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 | 1-75% ±5% |
| Automatic Shutdown | About 10 minutes later |
| Measuring Rate | 0.5 second |
| Storage Temperature | -10°C~60°C |
| Ambient Temperature | 0~40°C |
| Relative Humidity of Use Environment | 0~85%RH |
| Power Supply | 2 x 1.5V AAA battery (Not included) |
| Size (including protective cap) | 147 x 42 x 25mm |
| Weight (including protective cap) | 90g |
| Types of Testable Materials | More than 7 types |
Figure 5.1: Technical Index
6. Setup
6.1 Battery Installation
- Locate the battery compartment cover on the back of the device.
- Slide or open the cover.
- Insert two (2) 1.5V AAA batteries, ensuring correct polarity (+/-) as indicated inside the compartment.
- Close the battery compartment cover securely.
7. Operating Instructions
7.1 Power On/Off
- To power on the device, press the MODE button.
- The device will automatically power off after approximately 10 minutes of inactivity to conserve battery life.
- To restart after automatic power-off, short press the MODE button.
7.2 Testing Instrument Accuracy (Datum Detection)
The protective cap includes a test board to verify the instrument's accuracy:
- Power on the device.
- Remove the protective cap.
- Insert the probes into the holes marked 'T' and 'B' on the inside of the protective cap.
- Read the displayed value. For accurate instruments, the reading should be approximately T-52% / B-27% ±5%.
Figure 7.1: Datum Test Point Usage
7.3 Wood Moisture Test
- Power on the device.
- Press the SET key repeatedly until 'MAT1' (or the appropriate wood material group) is displayed. Refer to the 'Material Parameters' section for specific wood types.
- Carefully insert the electrode probes into the wood surface.
- Read the moisture content displayed on the LCD screen.
Figure 7.2: Wood Moisture Detection
7.4 Material Range Conversion (MAT)
The device supports different material groups for accurate measurements. To switch between material ranges:
- Press the SET key to cycle through the available MAT ranges (e.g., MAT1, MAT2, MAT3, etc.).
- Select the appropriate MAT range corresponding to the material you are testing. Refer to the 'Material Parameters' table for guidance.
7.5 Ambient Temperature and Humidity Display
The device can also display ambient temperature and humidity:
- After powering on, short press the MODE button to display the current ambient temperature and humidity.
- To switch the temperature unit between Celsius (°C) and Fahrenheit (°F), press the SET button while the ambient temperature/humidity is displayed.
Figure 7.3: Ambient Temperature and Humidity Display
7.6 Other Material Tests (Concrete, Mortar, Brick)
The MESTEK WM700 is suitable for detecting moisture in various building materials:
- Follow the same procedure as for wood moisture testing, but ensure you select the correct MAT range for the specific building material (e.g., concrete, lime mortar, brick, anhydrous gypsum mortar layer).
- Refer to the 'Material Parameters' table for the corresponding MAT range and expected moisture values.
Figure 7.4: Multi-Material Application Examples
Figure 7.5: Product Test Scenarios
8. Material Parameters
For accurate measurements, select the correct material range (MAT) using the SET button. The table below provides the corresponding moisture ranges for various materials:
| 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 |
Figure 8.1: Material Parameters Table
9. Maintenance
- Keep the device clean and dry. Wipe with a soft, damp cloth if necessary.
- Store the device with the protective cap on to prevent damage to the probes.
- Remove batteries if the device is not used for extended periods to prevent leakage.
- Avoid exposing the device to direct sunlight, high temperatures, or high humidity.
10. Troubleshooting
10.1 Common Issues
- No display or weak display: Check battery levels and replace if necessary. Ensure batteries are inserted with correct polarity.
- Inaccurate readings: Perform a datum test (Section 7.2) to verify instrument accuracy. Ensure the correct material range (MAT) is selected for the material being tested (Section 7.4 and 8). Ensure probes are fully inserted into the material.
- Device not turning on: Check battery installation. If the device has been idle for 10 minutes, short press the MODE button to reactivate it.
11. User Tips
- Material Selection is Key: Always ensure you have selected the correct material group (MAT) using the SET button before taking a measurement. This is crucial for obtaining accurate results, especially when measuring different types of wood or building materials like plaster, cement, or concrete.
- Probe Insertion: For consistent readings, ensure the probes are inserted to a uniform depth into the material.
- Multiple Readings: Take several readings in different spots on the material to get a more representative average moisture content.
12. Warranty and Support
MESTEK provides 3 months of free maintenance for this product. If any part requires replacement, the buyer is responsible for the cost of the parts. For any issues or support, please contact the seller or refer to the contact information provided with your purchase.
13. Product Video Overview
Watch this video for a visual guide on the MESTEK WM700's features and basic operation:
