1. Product Overview
The CERTEON HTC Series Digital Thermo-Hygrometer is designed for accurate indoor and remote temperature and humidity monitoring. It features a large LCD display for easy readability and supports real-time measurement. Different models offer built-in sensors or external probes for various applications, including household, agricultural, laboratory, and light industrial use.
Key features include a wide temperature range, humidity measurement, and additional functions like a clock, alarm, and memory for high/low readings.
2. Setup Instructions
2.1. Battery Installation
- Locate the battery compartment on the back of the unit.
- Open the battery compartment cover.
- Insert one 1.5V AAA battery, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
2.2. Placement and Probe Positioning
- Place the main unit on a stable, flat surface using its integrated desktop stand.
- Alternatively, use the hanging hole on the back to mount it on a wall.
- For models with an external probe (HTC-1 Upgrade, HTC-2), position the probe in the desired measurement area.
- Ensure the probe cable is not kinked or obstructed.
3. Operating Instructions
3.1. Initial Operation
Once the battery is installed, the device will automatically power on and begin measuring temperature and humidity. Readings will be displayed on the large LCD screen.
3.2. Control Buttons
The device features several buttons for setting and accessing functions:
- MODE: Used to switch between clock and alarm modes, and to set the time (12-hour or 24-hour format) and alarm.
- ADJ: Adjusts the value of the selected setting during configuration.
- MEMORY: Displays the recorded high and low temperature and humidity values. Press and hold to clear the memory.
3.3. Data Reading
- Temperature: The main display area shows the current temperature in degrees Celsius or Fahrenheit (switchable).
- Humidity: Relative humidity is displayed as a percentage (RH%).
- HTC-2 Specific: For the HTC-2 model, the display may alternate or simultaneously show indoor measurements (from the built-in sensor) and probe temperature (from the external waterproof probe).
4. Maintenance
- Cleaning: Clean the housing with a soft, dry cloth. Do not use solvents, abrasive cleaners, or immerse the unit in water.
- Storage: Store the product in a dry and well-ventilated area. Avoid mechanical shock or heavy pressure.
- Battery Care: Regularly check the battery condition to prevent leakage. Remove the battery if the device will not be used for an extended period.
5. Troubleshooting
- No Display/Power Issues: Check battery installation for correct polarity. Ensure the battery is not depleted. Replace with a new 1.5V AAA battery if necessary.
- Inaccurate Readings:
- Ensure the device is not placed near strong electromagnetic fields, direct heat sources, or direct sunlight.
- Verify the operating environment is within the specified temperature and humidity ranges.
- For probe models, ensure the probe is correctly positioned and not damaged.
- Probe Not Working (HTC-1 Upgrade): The probe for the HTC-1 Upgrade is not waterproof. Ensure it has not been exposed to moisture or liquids, as this can damage it.
- Probe Not Working (HTC-2): While the HTC-2 probe is waterproof, it measures temperature only. Ensure you are not expecting it to measure humidity.
6. Specifications
| Feature | HTC-1 | HTC-1 Upgrade Version | HTC-2 |
|---|---|---|---|
| Display | LCD Digital Display | ||
| Sensor Type | Built-in sensor (no probe) | External probe (non-waterproof) | Built-in + External probe (waterproof) |
| Probe Function | — | Measures temperature & humidity | Measures temperature only |
| Waterproof | Not applicable | Probe not waterproof | Probe is waterproof |
| Dimensions | 101 × 92 × 20 mm | 106 × 98 × 23 mm | 106 × 98 × 23 mm |
| Temperature Range | -50°C to +70°C | ||
| Humidity Range | 10% RH to 99% RH | ||
| Probe Cable Length | — | 1 meter | 1 meter |
| Material | ABS | ||
| Installation | Stand / Wall-mounted | ||
| Power Supply | 1 × AAA Battery | ||
A detailed user manual in PDF format is available for download: User Manual (PDF)
7. User Tips
- For optimal battery life, remove the AAA battery if the device will not be used for an extended period.
- To ensure accurate readings, place the device away from direct drafts, heating/cooling vents, and direct sunlight.
- When using the external probe, ensure it is fully extended and positioned correctly in the area you wish to monitor.
8. Frequently Asked Questions (FAQ)
- Q: Which model has a waterproof probe?
- A: Only the HTC-2 model comes with a waterproof probe, suitable for water temperature measurement. The HTC-1 Upgrade version's probe is not waterproof.
- Q: Can I use the probe for both temperature and humidity?
- A: The external probe of the HTC-1 Upgrade version can measure both temperature and humidity. The HTC-2's external probe measures temperature only, but the main unit's built-in sensor detects humidity.
- Q: Is installation easy?
- A: Yes, installation is straightforward. Each unit includes a foldable stand for desktop use and a wall-mount hole for flexible placement. It is powered by a single AAA battery.
9. Warranty and Support
For any product inquiries, technical support, or warranty information, please contact the seller directly.
