ALIENTEK EL15 Programmable DC Load Tester

1. Introduction

The ALIENTEK EL15 is a compact, high-precision, and high-power density programmable DC electronic load designed for various testing requirements, including battery capacity, power supply performance, and internal resistance measurements. It features a 1.9-inch IPS LCD screen, 13000RPM dual fans for efficient heat dissipation, and comprehensive six-fold protection mechanisms.

2. Package Contents

Before using the device, please verify that all items listed below are present and in good condition.

• EL15 Electronic Load x1
• USB Cable - Type-C x1
• XT30U-F Female Connector x1
• Alligator Clip Power Cable - Red x1
• Alligator Clip Power Cable - Black x1

3. Device Overview

3.1 Front Panel and Connections

1. 4mm Load Input Port Positive + (Red)
2. Remote Compensation Input Port (XT30 Male Connector)
3. 4mm Load Input Port Negative - (Blue)
4. 1.9-inch IPS LCD Screen
5. USB TYPE-C Power Input Port
6. Multi-function Keyboard
7. Radiator Air Outlet
8. Radiator Air Inlet

3.2 Side Panel Features

The EL15 features three-in-one 4mm Gold-Plated Banana Jacks for load input, an XT30 Remote Compensation Inlet, and an Enable Indicator Light. The device is constructed with full aluminum CNC craftsmanship for durability and efficient heat dissipation.

4. Setup and Connection

4.1 Powering the Device

Connect the EL15 to a 5V 2A power source using the provided USB Type-C cable. The USB TYPE-C Power Input Port (5) is located on the side of the device.

4.2 Measurement Connections

The EL15 supports both local and remote measurement configurations. Ensure the correct wiring method is used for your testing scenario.

• Local Measurement: Suitable for quick measurement scenarios. Only two load wires (positive and negative) need to be connected between the electronic load and the source under test.
• Remote Measurement: Suitable for high-precision measurement scenarios. Four wires need to be connected between the electronic load and the source under test: two load wires (positive and negative) for current transmission, and two remote compensation wires (connected to the XT30 male connector) for detecting the actual output voltage of the source under test.

Note: When switching between remote measurement and local measurement, you need to select the corresponding option in the system settings.

4.3 Bluetooth Connection

The EL15 features Bluetooth connectivity for control via a mobile app named "ATK-xTOOL", supporting both Android and iOS devices.

1. Open the mobile app "ATK-xTOOL".
2. Scan for Bluetooth devices and add the EL15.
3. Find and connect to the device (e.g., "EL15_F").
4. Once connection is successful, click to enter the EL15 interface.
5. Operate the EL15 through the app interface.

5. Operating Modes

The EL15 offers a variety of measurement modes to suit different testing needs.

5.1 Basic Measurement Modes

• Constant Current Mode (CC): The load will draw current at the set value, regardless of input voltage changes.
• Constant Voltage Mode (CV): The load maintains the input voltage at a constant value by drawing current.
• Constant Resistance Mode (CR): The load is equivalent to a constant resistor, dynamically adjusting the load current according to the input voltage.
• Constant Power Mode (CP): Dynamically adjusts the load current according to the input voltage to make the load consume constant power.

5.2 Battery Measurement Mode

• Capacity Test (CAP): Records discharge time and current through constant-current discharge to evaluate battery capacity, energy storage device evaluation, energy storage device testing, battery aging analysis, and product quality inspection.
• DC Internal Resistance Measurement (DCR): Measures the internal resistance derived from the voltage change between two passes of load current, a key parameter for evaluating power supply characteristics, output performance, and state of health.

5.3 Advanced Measurement Modes

• List Test (LIST): Stores up to 10 sets of current and duration parameters to perform complex testing under multiple conditions. Typical uses include dynamic performance testing, automated verification, and quality control.
• Scan Test (SCAN): By setting low current, high current, and rise/fall time, dynamic response performance testing of the device under test can be realized.

5.4 Power Supply Measurement Mode

• Dynamic Test (DT): Dynamically tests with alternating current levels, simulating real-world load changes to evaluate the power supply's response speed, efficiency, reliability, and safety.
• Automatic Test (AUTO): Streamlines testing with one-click automation. After configuring initial rated termination and step currents, the system provides a comprehensive suite of metrics—from rated power and voltage to maximum current, power, and load regulation.

6. Maintenance

6.1 Cleaning

• Ensure the device is powered off and disconnected from all power sources and loads before cleaning.
• Use a soft, dry cloth to wipe the exterior of the device.
• Do not use abrasive cleaners, solvents, or harsh chemicals, as these may damage the casing or screen.
• Keep the radiator air inlets and outlets clear of dust and debris to ensure proper airflow and cooling.

6.2 Storage

• Store the EL15 in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity.
• Keep the device in its original packaging or a protective case when not in use to prevent physical damage.
• Avoid storing in environments with excessive dust or corrosive gases.

7. Troubleshooting

This section provides solutions to common issues you might encounter with your ALIENTEK EL15.

7.1 General Issues

• Device does not power on: Ensure the USB Type-C cable is securely connected to a 5V 2A power source and the device. Try a different USB cable or power adapter.
• Display is blank or unresponsive: Check power connection. If powered, try restarting the device.
• Incorrect readings: Verify all measurement connections are secure and correctly wired for local or remote measurement. Ensure the correct measurement mode is selected.
• Bluetooth connection issues: Make sure Bluetooth is enabled on your mobile device and the EL15. Ensure the "ATK-xTOOL" app is up to date. Try restarting both the EL15 and your mobile device.

7.2 Protection Features

The EL15 is equipped with six-fold protection to ensure safe operation:

• Overcurrent Protection (OCP): Prevents damage from excessive current.
• Overvoltage Protection (OVP): Protects against input voltages exceeding safe limits.
• Overpower Protection (OPP): Safeguards the device from exceeding its maximum power rating.
• Undervoltage Protection (UVP): Prevents operation below a safe minimum voltage.
• Over-temperature Protection (OTP): Shuts down the device if internal temperature becomes too high.
• Reverse Polarity Protection (RPP): Protects against damage from incorrect polarity connections.

If any protection is triggered, the device may shut down or display an error. Address the underlying issue (e.g., reduce load, correct wiring) before resuming operation.

8. Specifications

Detailed technical specifications for the ALIENTEK EL15.

8.1 Measurement Accuracy

• Voltage reading: 1mV, accuracy 0.05% + 0.1% FS
• Current reading: 0.1mA, accuracy 0.025% + 0.025% FS

8.2 Cooling System

The EL15 is equipped with 13000RPM dual fans and a dense-tooth radiator to ensure excellent heat dissipation, allowing it to handle full load without issues. It adopts low-noise, high-speed 3510 dual fans and intelligent PID control for a good balance between noise and heat generation.

9. User Tips

• For critical measurements, especially with long cables, always utilize the remote compensation input to ensure accurate voltage readings at the source.
• Familiarize yourself with the different measurement modes (CC, CV, CR, CP) and their applications to optimize your testing process.
• When performing battery capacity tests, ensure the battery is fully charged before starting the discharge cycle for consistent results.
• Regularly check the fan vents for dust accumulation and clean them to maintain optimal cooling performance and device longevity.
• Leverage the "ATK-xTOOL" mobile app for convenient remote control and data monitoring, especially for prolonged tests.
• Always start with lower load settings and gradually increase them to avoid triggering protection mechanisms, especially when testing unknown power sources.

10. Warranty and Support

The ALIENTEK EL15 Programmable DC Load Tester is designed for reliability and performance. For any technical assistance, warranty claims, or support inquiries, please contact your original point of purchase or the manufacturer's customer service. Keep your purchase receipt as proof of purchase for warranty services.