WnewTools ET5410 Professional DC Electronic Load User Manual

1. Introduction

This manual provides detailed instructions for the safe and effective operation of the WnewTools ET5410 Professional DC Electronic Load. The ET5410 is a programmable digital control electronic load designed for various testing applications, including battery capacity testing and power supply evaluation. It features a 2.8-inch TFT LCD display and supports multiple measurement modes.

2. Safety Information

To ensure safe operation and prevent damage to the device or injury, please observe the following precautions:

• Always connect the device to a properly grounded power outlet.
• Verify the input voltage switch (110V/220V) on the rear panel matches your local power supply before connecting the power cord.
• Do not operate the device in wet or damp conditions.
• Ensure proper ventilation around the unit to prevent overheating. Do not block the vents.
• Do not exceed the specified voltage, current, or power ratings of the device.
• Disconnect power before performing any maintenance or fuse replacement.
• Avoid touching live terminals during operation.
• In case of malfunction, disconnect power immediately and contact qualified service personnel.

3. Product Overview

3.1. Key Features

• 2.8-inch TFT LCD display with 320 x 240 resolution, supporting Chinese and English display.
• Intuitive interface for simple and convenient operation.
• Key lock function to prevent accidental operation.
• Multiple basic measurement modes: Constant Current (CC), Constant Voltage (CV), Constant Resistance (CR), Constant Power (CP), CC+CV, CR+CV.
• Specialized test functions: Battery Test, LED Test, Dynamic Test, Scanning Test, List Mode, Short Circuit Test.
• Far-end measurement capability for improved accuracy at high currents.
• Support for external trigger input.
• Built-in buzzer alarm.
• Power-off data storage function.
• Remote operation via RS-232 and USB Device interfaces.

3.2. Front Panel Components

The front panel provides the main interface for controlling and monitoring the electronic load.

Figure 3.2.1: Front View of ET5410. This image displays the front panel of the ET5410, featuring the 2.8-inch TFT LCD screen, rotary knob, power button, input terminals (red for positive, black for negative), and various control buttons including Menu, Local, Enter, Esc, Utility, Mode, Trigger, Shift, and On/Off.

Figure 3.2.2: Angled Front View of ET5410. This image provides an angled perspective of the ET5410, showing the front panel controls and the side ventilation grilles.

Key front panel elements include:

• LCD Display: Shows measurement data, settings, and menu options.
• Rotary Knob: Used for adjusting values and navigating menus.
• Power Button: Turns the unit on or off.
• Input Terminals: Red (+) and Black (-) terminals for connecting the load.
• Control Buttons:
• Menu: Accesses the main menu.
• Local: Returns to local control from remote operation.
• Enter: Confirms selections or inputs.
• Esc: Exits current menu or cancels an operation.
• Utility: Accesses utility functions.
• Mode: Selects different operating modes (CC, CV, CR, CP).
• Trigger: Initiates trigger events for dynamic tests.
• Shift: Used in combination with other keys for secondary functions.
• On/Off: Toggles the load on or off.

Figure 3.2.3: Front Panel Evolution. This image compares older and newer versions of the ET5410 series front panels. Note that the PS2 interface for external keypad input has been removed in newer models.

3.3. Rear Panel Components

The rear panel contains power input, communication ports, and ventilation.

Figure 3.3.1: Labeled Rear View of ET5410. This image shows the rear panel of the ET5410 with key components labeled: Vents for cooling, USB Interface for remote control, Power Port for AC input, a Spare Fuse holder, and a 110/220V Switch Key for voltage selection.

• Vents: Essential for heat dissipation. Ensure they are not obstructed.
• USB Interface: For connecting to a computer for remote control and data acquisition.
• RS232 (or 485) Interface: Another port for remote communication.
• Power Port: AC power input connector.
• Spare Fuse: Holder for a replacement fuse.
• 110/220V Switch Key: Selects the appropriate input voltage (110Vac or 220Vac).

3.4. Side Panel and Dimensions

Figure 3.4.1: Side View with Dimensions. This image illustrates the side profile of the ET5410, including its approximate dimensions: 90mm (width), 190mm (height), and 300mm (depth).

Figure 3.4.2: Unit with Carrying Handle. This image shows the ET5410 being carried, demonstrating the integrated handle for portability.

4. Setup

4.1. Power Connection

1. Before connecting the power cord, locate the 110/220V Switch Key on the rear panel (refer to Figure 3.3.1).
2. Ensure the switch is set to match your local power supply voltage (e.g., 110V for North America, 220V for Europe).
3. Connect the provided power plug to the Power Port on the rear panel and then to a grounded AC outlet.

4.2. Load Connection

1. Identify the red (+) and black (-) Input Terminals on the front panel.
2. Connect the positive terminal of the device under test (DUT) to the red (+) input terminal of the ET5410.
3. Connect the negative terminal of the DUT to the black (-) input terminal of the ET5410.
4. Ensure all connections are secure to prevent arcing or poor contact.

4.3. Remote Control Connection (Optional)

• For USB control, connect a USB cable from the USB Interface on the rear panel to your computer. Install necessary drivers and software as provided by the manufacturer.
• For RS-232 control, connect an RS-232 cable to the designated port on the rear panel and to your computer.

5. Operation

5.1. Power On/Off

Press the red POWER button on the front panel to turn the unit on. Press it again to turn off the unit.

5.2. Basic Measurement Modes

The ET5410 supports several basic operating modes. Press the Mode button to cycle through or select these modes from the menu.

• Constant Current (CC): The load draws a constant current regardless of the input voltage.
• Constant Voltage (CV): The load maintains a constant voltage across its terminals.
• Constant Resistance (CR): The load simulates a constant resistance.
• Constant Power (CP): The load draws a constant power.
• CC+CV: Combines constant current and constant voltage modes, often used for battery charging simulation.
• CR+CV: Combines constant resistance and constant voltage modes.

5.3. Setting Parameters

Use the Rotary Knob to adjust numerical values. Press Enter to confirm a setting. Use the Menu and Esc buttons to navigate through the display and settings.

5.4. Advanced Test Functions

• Battery Test: Designed for evaluating battery discharge characteristics and capacity.
• LED Test: Specific mode for testing LED drivers.
• Dynamic Test: Allows for testing the dynamic response of power supplies by switching between two load levels.
• Scanning Test: Tests the continuity of power output within a defined range.
• List Mode: Simulates complex load changes by executing a programmed sequence of load steps.
• Short Circuit Test: Simulates a load short circuit condition.

5.5. Far-End Measurement

For high current applications, the far-end measurement function can be enabled to compensate for voltage drop across the test leads, improving measurement accuracy. Refer to the on-screen menu for activation.

5.6. Key Lock Function

To prevent accidental changes to settings, activate the key lock function through the utility menu. This will disable most front panel buttons until unlocked.

6. Maintenance

6.1. Cleaning

Wipe the exterior of the unit with a soft, dry cloth. Do not use abrasive cleaners or solvents. Ensure the unit is powered off and disconnected from the AC supply before cleaning.

6.2. Fuse Replacement

If the unit fails to power on, the fuse may need replacement. A spare fuse is located in a holder on the rear panel (refer to Figure 3.3.1).

1. Ensure the unit is powered off and disconnected from the AC supply.
2. Locate the fuse holder on the rear panel.
3. Carefully remove the old fuse.
4. Insert a new fuse of the correct rating (specified on the unit or in the specifications section).
5. Securely close the fuse holder.

7. Troubleshooting

• Unit does not power on: Check the power cord connection, the 110/220V switch setting, and the fuse (refer to Section 6.2).
• Buzzer alarm sounds: This indicates an error or warning condition. Check the display for specific error messages and consult the manual for their meaning. Common causes include over-voltage, over-current, or over-power conditions.
• Incorrect readings: Ensure proper load connections, especially for far-end measurement if applicable. Verify the selected measurement mode and settings.
• Remote control issues: Verify USB/RS232 cable connections, driver installation, and software settings on the computer. Ensure the unit is not in local control mode.
• Data not saved after power off: The unit has a power-off data storage function. If data is not retained, ensure the function is enabled in the settings, or there might be an internal issue requiring service.

8. Specifications

The following table details the technical specifications for the ET5410 model.

Figure 8.1: Detailed Specifications Table. This table provides comprehensive technical specifications for the ET5410 (single channel, 400W, 0-150V, 0-40A), ET5411 (single channel, 400W, 0-500V, 0-15A), and ET5420 (double channel, 400W, 0-150V, 0-20A x 2) models, covering rated input, constant voltage, constant current, constant resistance, constant power, dynamic test function, battery test, and measuring range for voltage and current readback.

9. Warranty and Support

For warranty information, technical support, or service inquiries, please contact your vendor or the manufacturer directly. Keep your purchase receipt as proof of purchase.