Instruction Manual

1. Introduction

The East Tester ET54A+ series programmable DC electronic load is a high-performance device designed for precise testing in various electrical applications. It offers 1mV/1mA high resolution and superior performance, making it suitable for testing chargers, switching power supplies, linear power supplies, and batteries in production lines, as well as for research and development purposes.

This manual provides essential information for the safe and efficient operation of your ET54A+ series electronic load, including models ET5410A+, ET5420A+, and ET5411A+.

2. Key Features

• User-Friendly Design: Features a 2.8-inch TFT LCD screen with rich display content, supporting both Chinese and English. The visual interface display system ensures simple and convenient operation.
• Key Lock Function: Prevents accidental misoperation, enhancing safety and reliability.
• Multiple Measurement Modes: Provides 6 basic measurement modes: Constant Current (CC), Constant Voltage (CV), Constant Resistance (CR), Constant Power (CP), CC+CV, and CR+CV.
• Professional Test Functions: Includes dedicated modes for battery testing, LED testing, dynamic testing, scan testing, list mode testing, and short circuit testing.
• Internal Resistance Test: Offers a function to test battery/power supply internal resistance.
• Remote Compensation: Equipped with software remote compensation capabilities.
• Data Storage: Maintains data storage in case of power failure.
• Connectivity: Standard USB communication interface for online operation, with optional RS-232 or 485 interfaces available.
• Multiple Safety Protections: Features overcurrent, overvoltage, overpower, and over-temperature protection. Parameters can be flexibly set to protect the load effectively.
• Intelligent Cooling: Intelligent fan speed control function effectively reduces fan noise during operation.
• Polarity Protection: Includes input polarity reverse prompt for safe connection.
• Buzzer Alarm: Built-in buzzer alarm for alerts.

3. Setup

Before operating the device, ensure it is placed on a stable, level surface with adequate ventilation. Keep the cooling ports clear of obstructions.

3.1 Package Contents

Verify that all items are present in the package:

• 1 x ET54A+ Series DC Electronic Load (specific model: ET5410A+, ET5420A+, or ET5411A+)
• 1 x Power Cord
• 2 x Fuses
• 1 x User Manual (English)

3.2 Connecting Power

1. Ensure the device's power switch is in the OFF position.
2. Connect the provided power cord to the power outlet on the rear panel of the electronic load.
3. Plug the other end of the power cord into a suitable AC power source (100Vac±10%~240Vac±10%, 50/60Hz).

3.3 Connecting the Load

1. Identify the positive (red) and negative (black) terminal interfaces on the front panel.
2. Connect your device under test (load) to these terminals using appropriate test leads. Ensure correct polarity. The device will provide an input polarity reverse prompt if an incorrect connection is detected.

4. Operating Modes

The ET54A+ series offers a variety of operating modes and test functions accessible via the front panel controls and the 2.8-inch TFT LCD screen.

4.1 Basic Measurement Modes

The device supports the following basic measurement modes:

• CC Mode (Constant Current): Maintains a constant current draw from the load.
• CV Mode (Constant Voltage): Maintains a constant voltage across the load.
• CR Mode (Constant Resistance): Simulates a constant resistance load.
• CP Mode (Constant Power): Maintains a constant power dissipation.
• CC+CV Mode: Combines constant current and constant voltage characteristics.
• CR+CV Mode: Combines constant resistance and constant voltage characteristics.

4.2 Professional Test Functions

• Battery Test: Used for capacity testing of various batteries.
• LED Test: Simulates performance testing of LED power supplies.
• Dynamic Test: Tests the dynamic output performance of a power supply.
• Scan Test: Tests the continuity of power output within a certain range.
• List Mode: Simulates a variety of load state changes.
• Short Circuit Test: Simulates a load short circuit condition.
• Internal Resistance Test: Measures the internal resistance of batteries or power supplies.
• Qualified Testing Function: For specific pass/fail criteria.
• Remote Compensation Function: Compensates for voltage drop in test leads.

4.3 Interface and Controls

The front panel features an adjustment knob, mode keys (CC, CV, I_R, V_R), arrow keys, ENTER, ESC, SET, MENU, CH, TRIG, and ON/OFF buttons for intuitive operation. The rear panel includes a USB Host interface for online operation, and optional RS232/485 interfaces are available for remote control.

5. Maintenance

To ensure the longevity and optimal performance of your East Tester electronic load, follow these maintenance guidelines:

• Cleaning: Regularly clean the exterior of the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Ventilation: Ensure that the cooling ports on the sides and rear of the device are always clear of dust and obstructions to allow for efficient heat dissipation.
• Fuse Replacement: If the device fails to power on, check the fuse located in the fuse box on the rear panel. Replace it with one of the provided spare fuses of the correct rating.
• Storage: When not in use for extended periods, store the device in a clean, dry environment within the specified storage temperature range (-10℃ to 70℃).

6. Troubleshooting

This section provides guidance on common issues you might encounter. The ET54A+ series is equipped with several protection features to ensure safe operation.

• Device Not Powering On: Check the power cord connection and ensure the power outlet is functional. Verify the fuse in the rear panel's fuse box.
• Buzzer Alarm Sounds: A built-in buzzer alarm indicates an operational issue. Refer to the display for error messages. Common causes include overcurrent, overvoltage, overpower, or over-temperature conditions.
• Overcurrent (OC), Overvoltage (OV), Overpower (OP) Protection Triggered: If the device shuts down or limits operation, check your load connections and ensure the input parameters (current, voltage, power) are within the device's specified limits and your set protection thresholds. Adjust the load or protection settings as necessary.
• Over-Temperature Protection Triggered: Ensure adequate ventilation around the device. Clear any obstructions from the cooling ports. Allow the device to cool down before resuming operation.
• Incorrect Polarity Warning: If an input polarity reverse prompt appears, immediately disconnect the load and re-connect with the correct positive (red) and negative (black) terminals.
• Data Loss After Power Failure: The device features power-off data storage, so most settings and test results should be retained. If data appears lost, re-check settings.

For persistent issues, please contact customer support.

7. Specifications

7.1 Model-Specific Parameters

7.2 General Technical Specifications

• Power Supply Voltage: 100Vac±10%~240Vac±10%, 50/60Hz
• Display: 2.8-inch TFT LCD screen with resolution of 320×240
• Operating Temperature: 0℃ to 40℃
• Storage Temperature: -10℃ to 70℃
• Relative Humidity: < 80%
• Interface: Standard USB, optional RS232 (or 485)
• Dimensions (W×H×D): 90mm×190mm×300mm (approximately 3.54in×7.48in×11.81in)
• Weight: Approx. 3.5 kg

7.3 Scope of Protection

8. User Tips

No specific user tips were available from the provided data. Always refer to the official user manual for detailed operational advice.

9. Warranty and Support

9.1 Warranty Information

Our store provides free replacement for orders within 30 days from the delivery date. For orders between 1 and 12 months old, a partial payment of the order value may be required for replacement. For orders older than 12 months, small discounts may be offered.

9.2 Customer Support

Our working hours are Monday to Friday, 9:00 AM to 7:00 PM Beijing Time. Orders will not be processed during weekends and holidays.

If you encounter any problems, please contact us first. We aim to reply within 10 minutes during working hours and resolve your issue within 24 hours.

For a comprehensive guide, you can also refer to the official User Manual (PDF) available here.