UNI-T A56 BT / A57 BT Bluetooth Temperature Humidity Data Logger

1. Introduction

The UNI-T A56 BT and A57 BT are high-accuracy digital temperature and humidity data loggers designed for precise environmental monitoring. Utilizing a low-power microprocessor and a high-accuracy digital temperature humidity module as the sensor, these devices offer reliable data collection and analysis. Key features include large storage capacity, automatic recording, time display, and an LED sound-light alarm for critical thresholds.

The A57 BT model further enhances versatility by supporting external temperature and humidity probes, allowing for more targeted and flexible measurements. Both models facilitate data management through mobile applications and PC software, enabling users to easily modify records, view data, and export reports in PDF or CSV formats. These data loggers are widely used in various applications such as food processing, cold-chain transportation, laboratories, warehousing, and pharmaceutical workshops.

2. Key Features

• High Accuracy: Equipped with a high-precision digital temperature and humidity sensor, offering an accuracy of ±0.3℃ (0℃ ≤ t ≤ 60℃) and ±2.5%RH (≤ 90%RH).
• Wide Measurement Range: Temperature range from -40℃ to +85℃, and humidity range from 0% to 100% RH (non-condensing).
• Large Data Storage: Capable of storing up to 64,000 sets of temperature and humidity data.
• Multi-Path Data Transmission: Supports data transfer and sharing via Bluetooth APP and USB connection to PC software.
• Audible and Visual Alarm: Features settable high and low thresholds with beep and LED light alarms for immediate notification of abnormal conditions.
• Real-time Display: Simultaneous large-screen display of temperature, humidity, and time with HD backlight.
• Multiple Power Supply Methods: Powered by a disposable 3.6V ER14505 lithium-ion battery (up to 2 years life with 15-minute recording interval) and supports USB Type-C for power supply.
• Robust Design: IP54 protection level ensures the device is waterproof and dustproof, suitable for various environments.
• Convenient Mounting: Equipped with adsorption magnets and wall mounting holes for easy placement on metal surfaces or walls.
• External Probe Support (A57 BT only): The A57 BT model can connect to an external temperature and humidity probe for more targeted measurements.

3. Product Overview and Components

3.1 Device Layout

The following diagram illustrates the main components and controls of the data logger:

• LED Indicator: Provides visual status feedback.
• Display Screen: Shows temperature, humidity, time, and other information.
• Sensor Vent: Area for environmental sensing.
• USB Protection Cover: Protects the Type-C USB port.
• Start Key (Yellow): Initiates data recording.
• Stop Key (Blue): Stops data recording.
• Battery Cover: Access to the battery compartment.
• Battery Cover Switch: Secures the battery cover.
• Wall Opening: Hole for wall mounting.
• Magnet: For magnetic adsorption to metal surfaces.

3.2 Package Contents

Upon unpacking, please ensure all items are present:

• Host (1 set)
• Disposable lithium sub-battery (ER14505) (1 piece)
• Manual (1 copy)
• Warranty card (1 copy)
• Wall mounted screws (2 pieces)
• Expansion plug (2 pieces)
• USB data cable (1 piece)
• Temperature and humidity probe (1 piece, only for A57 BT)

4. Setup

4.1 Battery Installation

The device is powered by a disposable 3.6V ER14505 lithium-ion battery. To install or replace the battery:

1. Locate the battery cover on the back of the device.
2. Flip the battery cover switch to the right to open the battery cover.
3. Insert the ER14505 lithium-ion battery into the compartment, ensuring correct polarity.
4. Close the battery cover and secure it by flipping the switch to the left.

Note:

• The Type-C port at the bottom provides power supply.
• The rubber plug for the Type-C port is NOT waterproof when it is open.

4.2 External Probe Connection (A57 BT Only)

For the A57 BT model, an external temperature and humidity probe can be connected to expand measurement capabilities:

1. Locate the probe input jack on the device.
2. Connect the standard 2m temperature and humidity probe or an optional 1m piercing temperature probe to the jack.

4.3 Mounting the Device

The data logger can be easily placed in various locations using its built-in magnets or wall mounting holes:

• Magnetic Adsorption: Simply attach the device to any suitable metal surface.
• Wall Mounting: Use the provided wall hanging screws and expansion plugs to secure the device to a wall.

5. Operating Instructions

5.1 Power On/Off and Recording

• Power On: Press and hold the yellow 'Start' button to turn on the device.
• Start Recording: Once powered on, press the yellow 'Start' button to begin data logging.
• Stop Recording: Press the blue 'Stop' button to cease data logging.
• Power Off: Press and hold the blue 'Stop' button to turn off the device.

5.2 Setting Record Interval

The recording interval can be adjusted from 10 seconds to 24 hours. This setting is configured via the PC software or the mobile application (TempLink App).

5.3 Alarm Settings

The device supports both single and cumulative alarms for temperature and humidity thresholds. These can be configured using the PC software or mobile app.

• Single Alarm: An alarm is triggered immediately when a single measured value reaches or exceeds the set threshold.
• Cumulative Alarm: An alarm is triggered when the set threshold is reached and the duration of this condition meets a pre-defined delay.
• When an alarm is triggered, the buzzer will sound and the side LED will flash.

5.4 Display Modes

The recorder can switch between displaying the maximum, minimum, and average values of the recorded data. This allows for quick confirmation of abnormal high/low temperature and humidity data.

6. Data Management

6.1 PC Software Transfer

Connect the data logger to a computer via the Type-C USB cable to manage recorded data.

• The PC software allows direct generation and viewing of report files.
• Data can be exported in CSV or PDF formats for quick sharing and analysis.

6.2 Mobile Bluetooth APP Transmission (TempLink)

The TempLink mobile application allows for convenient wireless data management via Bluetooth.

• Connection: Open the TempLink App on your mobile device and connect to the A56 BT/A57 BT data logger via Bluetooth.
• Data Viewing: View device information, real-time graphs, and recorded data directly on your phone.
• Parameter Settings: Adjust various device settings including ID, temperature units, date & time, screen mode, backlight, buzzer, LED indicators, temporary PDF generation, recording mode, start-up method, starting delay, recording interval, button stop function, restart-up behavior, and alarm thresholds.
• Data Export: Export data in PDF, Excel (.csv), or combined PDF/Excel (.csv) formats.

7. Maintenance

7.1 Cleaning

To maintain the device's performance and appearance:

• Wipe the exterior of the data logger with a soft, dry cloth.
• Avoid using abrasive cleaners, solvents, or harsh chemicals, as these can damage the casing or display.
• Ensure no liquids enter the sensor vents or USB port.

7.2 Battery Care

• The device uses a disposable 3.6V ER14505 lithium-ion battery. Replace it when the battery indicator shows low power.
• For extended use or when the battery is depleted, the device can be powered via the USB Type-C port.
• If storing the device for a long period, it is recommended to remove the battery to prevent leakage.

7.3 Storage

• Store the data logger in a cool, dry place, away from direct sunlight and extreme temperatures.
• The storage temperature range is -40℃ to 85℃ (without battery) or -40℃ to 60℃ (including ER14505 battery).

8. Troubleshooting

• Device not turning on: Ensure the ER14505 battery is correctly installed and has sufficient charge. Try connecting via USB Type-C for power.
• No data recording: Check the recording mode and interval settings in the mobile app or PC software. Ensure recording has been initiated using the 'Start' button.
• Bluetooth connection issues: Verify that Bluetooth is enabled on both the data logger and your mobile device. Ensure the device is within the Bluetooth range and the TempLink app is open and attempting to connect.
• Inaccurate readings: Ensure the sensor vents are not obstructed. For the A57 BT, check that the external probe is securely connected. Place the device in a stable environment away from direct heat sources or drafts.
• Alarm not triggering: Review the alarm threshold and delay settings in the mobile app or PC software to ensure they are configured as desired. Check if the alarm switch is enabled.
• PC software not recognizing device: Ensure the USB Type-C cable is properly connected and the PC software is installed correctly. Try restarting the software or your computer.

9. Specifications

10. Application Scenarios

The UNI-T A56 BT / A57 BT data loggers are versatile and can be used in a wide range of applications requiring precise temperature and humidity monitoring:

• Food Processing: Monitoring conditions in food production and storage areas to ensure quality and safety.
• Cold Chain Transportation: Tracking temperature and humidity during the transport of perishable goods to maintain integrity.
• Laboratories: Maintaining precise environmental conditions for experiments and sample storage.
• Warehousing and Logistics: Monitoring storage environments for sensitive products.
• Cold Storage: Ensuring optimal conditions in freezers and refrigerated rooms.
• Pharmaceutical Workshop: Controlling environmental factors critical for drug manufacturing and storage.
• Network Cabinets: Monitoring temperature and humidity to prevent equipment overheating and moisture damage.
• Supermarket Refrigerators: Ensuring proper cooling for food and beverages on display.

11. User Tips

• Regular Battery Check: Although the battery life is long, it's good practice to periodically check the battery level, especially before critical long-term logging tasks.
• Optimal Placement: For the most accurate readings, place the data logger in a location representative of the environment you wish to monitor, avoiding direct sunlight, heat sources, or areas with poor air circulation.
• Utilize Mobile App: The TempLink mobile app offers a convenient way to monitor real-time data, adjust settings, and quickly export reports without needing a PC.
• Data Backup: Regularly download and back up your recorded data to prevent loss, especially before resetting the device or changing critical settings.

12. Warranty and Support

UNI-T products are designed and manufactured to high-quality standards. This product comes with a standard manufacturer's warranty. For specific warranty terms, duration, and conditions, please refer to the warranty card included in your product package.

For technical support, troubleshooting assistance, or any inquiries regarding your UNI-T A56 BT / A57 BT data logger, please contact the official UNI-T customer service or your local distributor. Contact information can typically be found on the UNI-T official website or on the product packaging.