1. Introduction
The MDWXDOFP HT618 is a digital psychrometer designed for accurate measurement of temperature, relative humidity, dew point, and wet bulb temperature. This device is suitable for various applications requiring precise environmental monitoring. This manual provides essential information for the safe and effective use of the HT618.
2. Safety Information
- Read all instructions carefully before operating the device.
- Do not expose the device to extreme temperatures, humidity, or direct sunlight.
- Avoid dropping or subjecting the device to strong impacts.
- Do not attempt to disassemble or modify the device. Refer all servicing to qualified personnel.
- Keep the device away from water and other liquids.
- Dispose of batteries according to local regulations.
3. Product Features
- Measures temperature, relative humidity, dew point, and wet bulb temperature.
- Digital display with backlight for clear readings in various lighting conditions.
- Data Hold function to freeze current readings.
- Max/Min/Avg recording capabilities.
- Selectable temperature units (°C/°F).
4. Package Contents
- HT618 Digital Psychrometer
- User Manual
5. Device Layout
This image displays the front of the HT618 device, manufactured by HABOTEST, showing the sensor at the top, the digital display in the middle, and control buttons below the display. The display shows readings for relative humidity (RH), dew point (DP), and wet bulb (WB) temperature, along with indicators for recording, max/min/avg values, and battery level. Buttons include 'H' (Data Hold), 'MEM READ' (Memory Read), '°C/°F' (Unit Selection), 'DP/WB' (Dew Point/Wet Bulb Mode), 'REC' (Record), and the power button.
Components Overview:
- Sensor Head: Located at the top, responsible for detecting temperature and humidity.
- LCD Display: Shows all measurement readings, units, and function indicators.
- H Button: Activates/deactivates Data Hold function.
- MEM READ Button: Accesses recorded maximum, minimum, and average values.
- °C/°F Button: Toggles between Celsius and Fahrenheit temperature units.
- DP/WB Button: Switches between Dew Point and Wet Bulb temperature display modes.
- REC Button: Initiates or stops data recording.
- Power Button: Turns the device On or Off.
6. Setup
6.1 Battery Installation
The HT618 requires batteries for operation. Locate the battery compartment on the back of the device. Open the compartment cover, insert the batteries according to the polarity indicators, and then securely close the cover.
6.2 Initial Power On
Press the Power Button (marked with ①) to turn on the device. The LCD display will illuminate and show current readings.
7. Operating Instructions
7.1 Power On/Off
- To turn on: Press the Power Button.
- To turn off: Press and hold the Power Button for approximately 2 seconds.
7.2 Temperature Unit Selection
Press the °C/°F Button to switch the temperature display between Celsius (°C) and Fahrenheit (°F).
7.3 Dew Point / Wet Bulb Mode
Press the DP/WB Button to cycle through the display of Dew Point (DP) temperature and Wet Bulb (WB) temperature. The current mode will be indicated on the display.
7.4 Data Hold Function
Press the H Button to freeze the current readings on the display. Press it again to release the hold and resume live measurements.
7.5 Max/Min/Avg Readings
Press the MEM READ Button to cycle through the maximum (MAX), minimum (MIN), and average (AVG) recorded values since the device was powered on or memory was cleared. To clear the memory, press and hold the MEM READ Button for approximately 2 seconds.
7.6 Data Recording
Press the REC Button to start or stop data recording. The display will indicate when recording is active. Refer to the device's full specifications for details on recording capacity and interval.
8. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Storage: When not in use for extended periods, remove the batteries and store the device in a cool, dry place away from direct sunlight.
- Battery Replacement: Replace batteries when the low battery indicator appears on the display to ensure accurate readings and proper operation.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | Low or dead batteries; Incorrect battery installation | Replace batteries; Check battery polarity |
| Inaccurate readings | Sensor obstructed or dirty; Device not stabilized in environment | Clean sensor gently; Allow device to acclimate to the environment for several minutes |
| Display is dim or flickering | Low battery power | Replace batteries |
10. Specifications
| Parameter | Value |
|---|---|
| Model | HT618 |
| Brand | MDWXDOFP |
| Package Dimensions | 1.18 x 0.79 x 0.39 inches |
| Item Weight | 1.76 ounces (50 Grams) |
| Color | One Color |
| Assembly Required | No |
| Number of Pieces | 1 |
11. Warranty Information
This product is covered by a standard manufacturer's warranty against defects in materials and workmanship. The warranty period and terms may vary. Please retain your proof of purchase for warranty claims. For specific warranty details, refer to the documentation provided with your purchase or contact customer support.
12. Support
For technical assistance, troubleshooting, or product inquiries, please contact your retailer or the manufacturer's customer support. Contact information can typically be found on the product packaging or the seller's website.