UNI-T UT383BT Digital Light Meter Instruction Manual

1. Introduction

The UNI-T UT383BT is a professional digital illuminance meter designed for effective measurement of light intensity. It displays results in units of Lux or Foot Candles (FC) and features Bluetooth connectivity for data transfer to the iENV App. This compact and easy-to-use device offers a wide measurement range and various functions for diverse applications.

Figure 1.1: The UNI-T UT383BT Digital Light Meter.

2. Setup

2.1 Battery Installation

The UT383BT requires 3x 1.5V AAA batteries for operation. To install or replace batteries, locate the battery compartment cover on the back of the device. Use a small screwdriver to open the cover, insert the batteries according to the polarity markings, and then securely close the cover.

Figure 2.1: Battery installation for the UT383BT.

2.2 App Installation (iENV App)

For enhanced functionality, download and install the iENV App on your iOS or Android smartphone. The app allows for data recording, export, storage, and analysis via Bluetooth. Ensure your device meets the compatibility requirements: iOS 8.4 or higher (iPhone 5S or above), Android 4.3 or higher, and Bluetooth 4.0 or higher with at least 1GB memory.

Figure 2.2: iENV App compatibility details.

To connect the meter to the app:

1. Install the iENV App from your device's app store or uni-trend.com.
2. Ensure Bluetooth is enabled on both your smartphone and the UT383BT meter.
3. Open the iENV App, search for the UT383BT device, and select it to establish a connection.

Figure 2.3: App connection steps.

3. Operating Instructions

3.1 Power On/Off

Press and hold the power button (usually marked with a circle and a vertical line) to turn the device on or off. The large LCD screen will display readings once powered on.

3.2 Measurement Units (Lux/FC)

The UT383BT can measure illuminance in Lux or Foot Candles (FC). Use the dedicated 'LUX/FC' button to switch between these units as needed.

3.3 Max/Min/Data Hold

• MAX/MIN: Press the 'MAX/MIN' button to view the maximum or minimum recorded light intensity during a measurement session.
• Data Hold: Press the 'HOLD/BL' button briefly to freeze the current reading on the display. Press it again to release the hold function and resume live measurements.

3.4 LCD Backlight

To activate the LCD backlight for better visibility in low-light conditions, press and hold the 'HOLD/BL' button. Repeat the action to turn off the backlight.

3.5 Bluetooth Connectivity

Once the iENV App is installed and connected (as described in Section 2.2), measurement data will be transferred via Bluetooth to your smartphone. This allows for real-time monitoring, data logging, and analysis directly from your mobile device.

Figure 3.1: Real-time data display on the iENV App.

4. Features

• Professional digital illuminance meter (UT383BT).
• Measures light intensity in Lux or Foot Candles (FC).
• Measurement Range: 0 - 199,900 Lux / 0 - 18,500 Fc.
• High accuracy of +/-(4% + 8).
• Bluetooth connectivity for iENV App (iOS/Android).
• App features: data recording, export, storage, and analysis.
• Compact and easy to use design.
• Large 4-digit LCD screen with backlight.
• 0.5-second sampling time.
• Overload indication.
• Max/Min value display.
• Data hold function.
• Low battery indicator.
• Auto shutdown for power saving.
• 1-meter drop durability.

5. Applications

The UNI-T UT383BT Light Meter is versatile and suitable for a wide range of applications where accurate light measurement is crucial. This includes:

• Lighting enterprises for design and verification.
• Agriculture and animal husbandry for optimal growth conditions.
• Mining enterprises for safety and operational lighting.
• Laboratories for experimental setups.
• Offices and households for ergonomic lighting assessment.
• Street light construction and maintenance.
• Camera and photography studios for exposure control.
• Illumination photometry in supermarkets, shopping malls, hotels, resorts, and libraries.

Figure 5.1: Common luminosity value reference for various environments.

6. Specifications

• Package Dimensions: 9.13 x 4.37 x 1.61 inches
• Item Weight: 5.7 ounces
• Item Model Number: UT383BT
• Manufacturer: UNI-T
• First Available Date: December 29, 2021

Figure 6.1: Physical dimensions of the UT383BT.

7. Maintenance

To ensure the longevity and accuracy of your UNI-T UT383BT Digital Light Meter, follow these maintenance guidelines:

• Keep the device clean and free from dust and debris. Use a soft, dry cloth for cleaning.
• Avoid exposing the device to extreme temperatures, humidity, or direct sunlight for prolonged periods.
• Store the meter in a cool, dry place when not in use.
• If the device will not be used for an extended period, remove the batteries to prevent leakage and potential damage.
• Handle the light sensor carefully to prevent scratches or damage, as this can affect measurement accuracy.

8. Troubleshooting

If you encounter issues with your UNI-T UT383BT, consider the following common troubleshooting steps:

• Device not powering on: Check if the batteries are correctly installed and have sufficient charge. Replace with new batteries if necessary.
• Inaccurate readings: Ensure the light sensor is clean and unobstructed. Avoid measuring in rapidly changing light conditions.
• Bluetooth connectivity issues: Verify that Bluetooth is enabled on both the meter and your smartphone. Ensure the iENV App is up-to-date and try restarting both devices.
• Display shows 'OL': This indicates an overload, meaning the light intensity exceeds the meter's maximum measurement range.

9. Warranty & Support

The UNI-T UT383BT Digital Light Meter comes with a standard warranty provided by UNI-T Direct. For any product-related inquiries, technical support, or warranty claims, please contact UNI-T Direct, the sole M2C store of authentic UNI-T products on Amazon. You can also refer to the included paper manual or download the e-manual for detailed information.

Figure 9.1: Package contents of the UT383BT.

10. Official Product Videos