TA620A Temperature Humidity Meter User Manual

Introduction

The Diyeeni TA620A is a versatile handheld digital meter designed for precise measurement of environmental parameters. It functions as a hygrometer and thermometer, capable of measuring relative humidity, ambient temperature, wet bulb temperature, and dew point temperature. This manual provides comprehensive instructions for the proper setup, operation, and maintenance of your TA620A meter.

Product Features

• Durable Construction: Made from excellent ABS material, ensuring wear and erosion resistance for various environments.
• Stable and Handheld Design: A stable and reliable digital hygrograph with a comfortable handheld form factor.
• Comprehensive Measurement: Measures relative humidity, ambient temperature, wet bulb temperature, and dew point temperature.
• Data Storage and Analysis: Features maximum, minimum, and average modes, unit conversion between Celsius and Fahrenheit, and storage for up to 99 data units.
• Portability: Small and lightweight, making it easy to carry for use in various settings such as gardens, laboratories, wine cellars, farms, storage rooms, and homes.
• High Accuracy: Utilizes a GXHTC3 high-precision sensor with a sampling rate up to 8 times/second and a display update rate of 3 times/second.
• Numerical Value Lock: Allows locking of maximum, minimum, and real-time values during measurement.
• HD Display: Features a display with white background lighting (34 x 31mm) for clear readability.
• Auto Shutdown: Automatically shuts down after 15 minutes of inactivity to conserve battery life.

Setup

1. Battery Installation

The TA620A meter requires 2 x 1.5V AAA (RO3/LRO3) size 7 batteries for operation.

1. Locate the battery compartment cover on the back of the device.
2. Slide the cover downwards to open the compartment.
3. Insert two AAA batteries, ensuring correct polarity (+/-) as indicated inside the compartment.
4. Close the battery compartment cover by sliding it back into place until it clicks securely.

Figure 1: Battery installation in the TA620A meter.

Operating Instructions

1. Device Overview

Figure 2: Overview of TA620A components and controls.

• Temperature and Humidity Probe: Located at the top, this probe measures ambient temperature and relative humidity.
• Display Screen: Shows measurement readings, units, and mode indicators.
• UNIT Button: Toggles between Celsius (°C) and Fahrenheit (°F) for temperature display.
• HOLD Button: Freezes the current reading on the display. Press again to release.
• MAX Button: Displays the maximum recorded value.
• MIN Button: Displays the minimum recorded value.
• Power Button (Red): Turns the device on or off.
• Backlight Button: Activates the display backlight for improved visibility in low light conditions.

2. Powering On/Off

Press the red power button (labeled with a circle and vertical line) to turn the meter on. To turn it off, press and hold the power button for a few seconds, or the device will automatically shut down after 15 minutes of inactivity.

3. Taking Measurements

Once powered on, the meter will immediately begin displaying ambient temperature and relative humidity. Ensure the probe is exposed to the environment you wish to measure.

Figure 3: TA620A displaying current temperature and humidity readings.

4. Unit Conversion (°C/°F)

Press the UNIT button to switch the temperature display between Celsius (°C) and Fahrenheit (°F).

5. Data Hold Function

Press the HOLD button to freeze the current readings on the display. This is useful for recording values in unstable environments or when you need to move the meter away from the measurement point. Press HOLD again to resume live readings.

6. Maximum/Minimum Value Display

The meter can record and display the maximum and minimum values measured since it was powered on or since the last reset.

• Press the MAX button to display the highest temperature and humidity recorded.
• Press the MIN button to display the lowest temperature and humidity recorded.
• To exit MAX/MIN mode and return to real-time readings, press the MAX or MIN button again.

Figure 4: Displaying maximum recorded values.

7. Backlight Function

To activate the display backlight, lightly press the backlight button (located above the HOLD button, with a lightbulb icon). This improves visibility in dimly lit environments. Press it again to turn off the backlight.

Figure 5: TA620A display with backlight activated.

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 to prevent leakage. Store the meter in a cool, dry place, away from direct sunlight and extreme temperatures.
• Probe Care: Keep the temperature and humidity probe clean and free from dust or debris to ensure accurate readings. Avoid touching the sensor directly.
• Battery Replacement: Replace batteries when the low battery indicator appears on the display to ensure continuous accurate operation.

Troubleshooting

Specifications

• Model: Diyeenimox2eg350c (TA620A)
• Brand: Diyeeni
• Measurement Functions: Relative Humidity, Ambient Temperature, Wet Bulb Temperature, Dew Point Temperature
• Temperature Range: -20°C to 60°C (-4°F to 140°F)
• Temperature Accuracy: ±1.5°C (±3°F)
• Humidity Range: 0% to 100% RH
• Humidity Accuracy: ±5% RH (20-80% RH), ±8% RH (other ranges)
• Sensor: GXHTC3 high-precision sensor
• Sampling Rate: Up to 8 times/second
• Display Update Rate: 3 times/second
• Display Size: 34 x 31mm
• Power Supply: 2 x 1.5V AAA (RO3/LRO3) batteries
• Automatic Shutdown: After 15 minutes of inactivity
• Data Storage: Up to 99 data units
• Dimensions: Approximately 7.87 x 3.54 x 1.97 inches
• Weight: Approximately 5.75 ounces
• Material: ABS
• Mounting Type: Tabletop
• Country of Origin: China

Warranty and Support

For information regarding product warranty, technical support, or service, please refer to the documentation included with your purchase or contact Diyeeni customer service directly. Contact details are typically provided on the product packaging or the official Diyeeni website.