1. Introduction
The HABOTEST HT73 is a professional, high-accuracy pin-type digital wood moisture meter designed for measuring moisture content in various materials, including firewood, lumber, and building materials. This compact and lightweight device features a high-precision sensor, embedded probes, and a tri-color backlit display for intuitive readings. It is an essential tool for DIY enthusiasts and professionals in woodworking and construction.
2. Product Overview
2.1 Key Features
- High-Precision Sensor: Ensures accurate moisture detection.
- Embedded Pin-Type Probes: For direct contact measurement.
- 7 Built-in Material Properties: Pre-calibrated settings for various wood and building materials.
- Data Hold Function: Locks the current reading on the display.
- MAX Measurement: Automatically captures and displays the highest reading.
- Tri-Color Backlight: Provides visual indication of moisture levels (Green: Low, Orange: Moderate, Red: High).
- Low Voltage Alarm: Alerts when batteries are low.
- Auto Shutdown: Powers off automatically after 10 minutes of inactivity to save battery.
- Compact & Lightweight Design: Portable for easy carrying and use.
- Ultra-Wide Measurement Range: 0.0% to 99.9% RH.
- High-Strength Hard Shell: Constructed from durable ABS material for impact resistance.
- Non-Slip Shell Design: Rubber strips on sides prevent accidental drops.
- Removable Probes: Allows for easy replacement of worn or damaged probes.
- Digital Display with Analog Bar: Combines precise digital readings with a predictive analog bar for enhanced efficiency.
2.2 Package Contents
Upon unpacking, please verify that all items listed below are present and in good condition:
- 1x HT73 Wood Moisture Meter
- 1x Probe Protective Cap
- 2x Spare Probes
- 1x Wrench (for probe removal/installation)
- 1x English Instruction Manual (this document)
- 1x Packaging Box
3. Specifications
| Function | Range | Accuracy |
|---|---|---|
| Range/Accuracy | Material 1 (Beech, spruce, larch, birch, cherry, walnut): 8.8%~54.8% | ±2.0% |
| Material 2 (Oak, pine, maple, ash, Douglas fir, eucalyptus): 6.8%~47.9% | ±2.0% | |
| Material 3 (Cement mortar layer, concrete): 0.9%~22.1% | ±2.0% | |
| Material 4 (Anhydrous gypsum mortar layer): 0.0%~11.0% | ±2.0% | |
| Material 5 (Cement mortar): 0.7%~8.6% | ±2.0% | |
| Material 6 (Lime mortar, gypsum): 0.6%~9.9% | ±2.0% | |
| Material 7 (Bricks): 0.0%~16.5% | ±2.0% | |
| Sensor | High-Precision Temperature and Humidity Sensor | |
| Probe | Stainless Steel Construction | |
| Display | Tri-Color Backlit Display | |
| Alarm Method | Red backlight: High moisture content Orange backlight: Moderate moisture content Green backlight: Low moisture content | |
| Data Hold | Press and release the HOLD button during measurement to lock the reading. | |
| Low Voltage Alert | Yes | |
| Auto Power Off | The meter will automatically power off if no operation is performed within 10 minutes after startup. | |
| Measurement Range | 0.0~99.9%RH | |
| Operating Environment | -10~50°C / 20~90%RH | |
| Storage Environment | -10~60°C / 20~90%RH | |
| Product Dimensions | 124 × 51 × 29 mm | |
| Product Weight | Approx. 81 g (without batteries) | |
| Power Supply | 2 × 1.5V AAA batteries (not included in product packaging) | |
4. Setup
4.1 Battery Installation
The HT73 requires 2 x 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 Probe Installation/Removal
The HT73 comes with removable probes for easy replacement.
- To install or replace probes, use the included small wrench.
- Carefully screw the probes into the designated sockets at the top of the meter.
- Ensure they are tightened securely but do not overtighten.
5. Operating Instructions
5.1 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.
5.2 Selecting Material Category
The HT73 has 7 built-in material categories. To select the appropriate category for your measurement:
- Press the M Button (Measurement Materials Category Selection Key) to cycle through the 7 material types.
- Ensure the selected category matches the material you are testing for accurate results.
5.3 Taking a Measurement
- Turn on the meter and select the correct material category using the M Button.
- Remove the probe protective cap.
- Carefully insert the two test probes into the material you wish to measure. Ensure both probes penetrate the surface adequately for good contact.
- Read the moisture content directly from the digital display. The analog bar provides a quick visual reference.
- The backlight color will indicate the moisture level: Green (Low), Orange (Moderate), Red (High).
- After measurement, remove the probes and replace the protective cap.
5.4 Data Hold Function
To freeze the current reading on the display:
- Press the MAX HOLD Button once during measurement. The reading will be held.
- Press the MAX HOLD Button again to release the hold function and resume live measurement.
5.5 MAX Measurement
To automatically capture and display the highest moisture reading during a measurement session:
- Press and hold the MAX HOLD Button for a few seconds. The meter will enter MAX measurement mode.
- The display will show the maximum moisture content detected.
- Press and hold the MAX HOLD Button again to exit MAX measurement mode.
5.6 Interpreting Tri-Color Backlight
The HT73's display backlight changes color to provide a quick visual indication of moisture levels:
- Green Backlight: Indicates Low Moisture content.
- Orange Backlight: Indicates Moderate Moisture content.
- Red Backlight: Indicates High Moisture content.
6. Maintenance
6.1 Cleaning
- After each use, wipe the probes clean with a dry cloth to remove any residue.
- Do not use abrasive cleaners or solvents on the device.
- Keep the display screen clean and free from dust.
6.2 Probe Replacement
The stainless steel probes are designed for durability but may wear out or become damaged over time. Use the provided wrench to replace them as described in Section 4.2.
6.3 Storage
- Always replace the probe protective cap after use to prevent damage to the probes and ensure measurement accuracy.
- Store the device in a cool, dry place, away from direct sunlight and extreme temperatures.
- If storing for an extended period, remove the batteries to prevent leakage.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | Dead or incorrectly installed batteries | Check battery polarity; replace with fresh AAA batteries. |
| Inaccurate readings | Incorrect material category selected; probes not fully inserted; dirty probes; damaged probes. | Ensure correct material setting; fully insert probes; clean probes; replace probes if damaged. |
| Display is dim or flickering | Low battery power | Replace batteries. |
| Auto shutdown too frequent | Normal operation (10 min inactivity) | This is a power-saving feature. Perform an action to keep the device awake. |
8. User Tips
- For best results, always ensure the probes are clean and make good contact with the material being tested.
- When measuring wood, try to insert the probes along the grain for more consistent readings.
- Take multiple readings in different spots on the material to get a comprehensive understanding of its moisture content.
- Remember that the tri-color backlight is a quick indicator; refer to the digital readout for precise values.
- Keep the protective cap on the probes when not in use to prevent accidental injury and damage to the probes.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.
