ZQFEE ET5410A+ Programmable DC Electronic Load User Manual

1. Introduction

The ZQFEE ET5410A+ is a programmable DC electronic load designed for precise testing and evaluation of power supplies, batteries, and other electronic components. It features a user-friendly interface with a 2.8-inch TFT LCD screen, supporting both Chinese and English languages. This device offers multiple operating modes including Constant Current (CC), Constant Voltage (CV), Constant Resistance (CR), and Constant Power (CP), along with advanced test functions for dynamic loads, scanning, and battery capacity testing. Its robust design incorporates comprehensive safety protections against overcurrent, overvoltage, overpower, and overtemperature, ensuring reliable and safe operation.

2. Safety Information

Please read and understand all safety instructions before operating the ET5410A+ electronic load. Failure to follow these instructions may result in injury or damage to the device.

• Power Supply: Ensure the power supply voltage is within the specified range of 100Vac±10%~240Vac±10%, 50/60Hz.
• Ventilation: Do not block the cooling ports. Ensure adequate ventilation around the device to prevent overheating.
• Environment: Operate the device in a dry environment, away from moisture, dust, and corrosive gases. Operating temperature should be between 0°C and 40°C.
• Polarity: Always observe correct input polarity. The device provides an input polarity reverse prompt.
• Overload Protection: The device includes overcurrent, overvoltage, overpower, and overtemperature protection. Do not attempt to bypass these safety features. Set overvoltage and overcurrent parameters appropriately for your test setup.
• Grounding: Ensure the device is properly grounded to prevent electrical shock.
• Servicing: Refer all servicing to qualified personnel. Do not open the device casing.

3. Package Contents

Verify that all items are present in the package:

• ET5410A+ Programmable DC Electronic Load Unit
• Power cord × 1
• Power fuse × 2
• User manual × 1

4. Product Overview

The ZQFEE ET5410A+ is a compact and powerful electronic load. Familiarize yourself with its physical features and controls.

Figure 4.1: Front Panel Layout
This image displays the front panel of the ET5410A+ unit, highlighting key components such as the LCD screen, control buttons, adjustment knob, and input terminals. It shows the rubber handle at the top, the LCD screen, various mode keys (CC, CV, CR, CP), an adjustment knob, return key (ESC), mode selection key, power button, trigger key, cooling port, and positive/negative terminal interfaces. On the right side of the screen, it points to the current range switch, voltage range switch, arrow keys, enter key (ENT), mode setting key, and system menu/ON/OFF button.

Figure 4.2: Front and Rear Views
This image provides a perspective view of the ET5410A+ unit, showing its overall design, including the handle and side ventilation. Below it, a split image shows the detailed front panel and the rear panel. The rear panel features the main power input, a fan, and various communication ports (USB, RS-232/485).

4.1 Front Panel Components

• LCD Screen: 2.8-inch TFT LCD for displaying measurement data, settings, and menu options.
• Rubber Handle: For portability.
• Mode Keys (CC, CV, CR, CP): Select the desired operating mode.
• Adjustment Knob: Used for adjusting parameter values and navigating menus.
• ESC (Return Key): Returns to the previous menu or cancels an operation.
• MODE (Mode Selection): Accesses different test modes.
• Power Button: Turns the unit on/off.
• TRIG (Trigger Key): Initiates or stops a test.
• Cooling Port: Ensures proper heat dissipation.
• Positive/Negative Terminal Interfaces: Connect the device under test.
• Current/Voltage Range Switches: Adjust the measurement range.
• Arrow Keys: Navigate through menu options.
• ENT (Enter Key): Confirms selections or enters values.
• SET (Mode Setting Key): Enters parameter setting mode.
• ON/OFF (System Menu): Accesses system settings.

4.2 Rear Panel Components

• AC Power Input: Connects the power cord.
• Cooling Fan: Provides active cooling.
• USB Interface: For remote control and data communication.
• RS-232/RS-485 Interface (Optional): For remote control and data communication.
• External Trigger Input (DB9): For external control signals.

5. Setup

Follow these steps to set up your ET5410A+ electronic load:

1. Unpacking: Carefully remove the electronic load from its packaging and verify all package contents against the list in Section 3.
2. Placement: Place the unit on a stable, level surface with adequate clearance for ventilation, especially around the cooling ports on the sides and rear.
3. Power Connection:
   • Ensure the power switch on the front panel is in the OFF position.
   • Connect the provided power cord to the AC power input on the rear panel of the ET5410A+.
   • Plug the other end of the power cord into a grounded AC power outlet (100-240Vac, 50/60Hz).
4. Load Connection:
   • Connect the positive (+) output of the device under test (e.g., power supply, battery) to the red positive terminal interface on the ET5410A+ front panel.
   • Connect the negative (-) output of the device under test to the black negative terminal interface on the ET5410A+ front panel.
   • Always ensure correct polarity to prevent damage to the unit or the device under test. The unit provides an input polarity reverse prompt.
5. Power On: Press the Power button on the front panel to turn on the unit. The LCD screen will illuminate.
6. Language Selection: If prompted, select your preferred language (Chinese or English) using the adjustment knob and ENT key.

6. Operation

The ET5410A+ offers various operating modes and test functions. This section outlines basic operation.

6.1 Basic Operating Modes

Press the corresponding mode key (CC, CV, CR, CP) to select the desired operating mode.

• Constant Current (CC) Mode: The electronic load draws a constant current regardless of the input voltage.
  • Press CC key.
  • Use the adjustment knob to set the desired current value. Press ENT to confirm.
• Constant Voltage (CV) Mode: The electronic load maintains a constant voltage across its terminals.
  • Press CV key.
  • Use the adjustment knob to set the desired voltage value. Press ENT to confirm.
• Constant Resistance (CR) Mode: The electronic load simulates a constant resistance.
  • Press CR key.
  • Use the adjustment knob to set the desired resistance value. Press ENT to confirm.
• Constant Power (CP) Mode: The electronic load dissipates a constant power.
  • Press CP key.
  • Use the adjustment knob to set the desired power value. Press ENT to confirm.
• CC+CV, CR+CV Modes: These modes combine constant current/resistance with a constant voltage limit. Refer to the on-screen menu for setting parameters in these combined modes.

6.2 Advanced Test Functions

Press the MODE key to access advanced test functions.

• Tran Test Mode: Tests the dynamic output performance of a power supply. Configure parameters like T1, T2, and accuracy (1ms-60s).
• Scan Test Mode: Tests the continuity of power output within a specified range.
• List Test Mode: Simulates various loading status changes according to a programmed list of steps.
• Short Circuit Test: Simulates a load short circuit condition. Use with caution.
• Battery Test: Professional battery discharge test function (CC or CR discharge mode, max discharge 9999Ah).
• LED Test: Specific test function for LED drivers.

6.3 Setting Parameters and Navigation

• Adjusting Values: Use the adjustment knob to change numerical values. The arrow keys can be used to move the cursor between digits.
• Confirming: Press the ENT key to confirm a setting or selection.
• Canceling/Exiting: Press the ESC key to cancel an operation or return to the previous screen.
• System Menu: Press the ON/OFF (System Menu) button to access general system settings, including language, display options, and interface settings.
• Triggering Tests: After setting up a test, press the TRIG key to start or stop the test.

7. Maintenance

Proper maintenance ensures the longevity and reliable operation of your ET5410A+ electronic load.

• Cleaning:
  • Before cleaning, ensure the unit is powered off and disconnected from the AC power supply and any connected loads.
  • Wipe the exterior of the unit with a soft, damp cloth. Do not use abrasive cleaners or solvents.
  • Keep the cooling ports free of dust and debris. Use a soft brush or compressed air to gently clean them.
• Storage:
  • Store the unit in a clean, dry environment with a temperature between -10°C and 70°C and humidity below 80%.
  • Protect the unit from extreme temperatures, direct sunlight, and high humidity.
• Fuse Replacement: If the unit fails to power on, check the power fuse located near the AC input on the rear panel. Replace it with a fuse of the same type and rating (two spare fuses are included).

8. Troubleshooting

This section provides solutions to common issues you might encounter.

9. Specifications

Detailed technical specifications for the ZQFEE ET5410A+ Programmable DC Electronic Load.

Figure 9.1: Model Comparison Table
This table provides a detailed comparison of the ET5410A+, ET5420A+, and ET5411A+ models, outlining their number of channels, power ratings, input voltage and current ranges, and specifications for CV, CC, CR, and CP modes, including resolution and accuracy. It also details dynamic test functions and battery test functions.

9.1 General Specifications (ET5410A+)

• Model: ET5410A+
• Number of Channels: Single channel
• Rated Power: 400W
• Input Voltage: 0-150V
• Input Current: 0-40A
• Power Supply Voltage: 100Vac±10%~240Vac±10%, 50/60Hz
• Display: 2.8-inch TFT LCD screen, 320×240 resolution
• Operating Temperature: 0°C to 40°C
• Storage Temperature: -10°C to 70°C
• Humidity: < 80% relative humidity
• Interface: Standard USB, optional RS232 (or 485)
• Dimensions (W×H×D): 90mm×190mm×300mm (approx. 3.54 x 7.48 x 11.81 inches)
• Item Weight: 5000 Grams (5 kg)
• Safety Standard: UL compliant

Figure 9.2: Device Dimensions
This image illustrates the physical dimensions of the ET5410A+ unit, showing its width (90mm), height (190mm), and depth (300mm).

9.2 Performance Specifications (ET5410A+)

• CV Mode:
  • Range: 0.1-19.999V, 0.1-150.00V
  • Resolution: 1mV, 10mV
  • Accuracy: ±(0.05%+0.02%FS)
• CC Mode:
  • Range: 0-3.000A, 0-40.00A
  • Resolution: 1mA, 10mA
  • Accuracy: ±(0.05%+0.05%FS)
• CR Mode:
  • Range: 0.05Ω-1kΩ, 1kΩ-4.5kΩ
  • Resolution: 10mΩ, 100mΩ
  • Accuracy: ±(0.1%+0.5%FS)
• CP Mode:
  • Range: 0-400W
  • Resolution: 10mW
  • Accuracy: ±(0.1%+0.5%FS)
• Dynamic Test Function:
  • Mode: CC, CV
  • T1&T2: 1ms~60s; Accuracy: 1ms
  • Accuracy: 0.1%+1ms
• Battery Test Function:
  • Discharge Mode: CC, CR
  • Maximum Discharge: 9999Ah

10. Warranty and Support

For warranty information and technical support, please refer to the documentation provided with your purchase or contact your vendor. The product typically includes a standard return policy of 30 days from the date of purchase.