East Tester ETPA/ETP Series

Contents

East Tester ETPA/ETP Series DC Regulated Power Supply User Manual

Models: ETPA 1503A, ETP1506A, ETP3003A, ETP3005A, ETP3010A, ETP6003A, ETP6005A, ETP1506B, ETP1520B, ETP3005B, ETP3010B, ETP6003B, ETP6005B, ETP10003B, ETP15002B

1. Introduction and Function Features

This series of adjustable DC stabilized power supply is a single output DC stabilized power supply with a four-digit LED digital display. It can simultaneously display voltage and current. It features automatic switching between Constant Voltage (CV) and Constant Current (CC) modes, with continuously adjustable voltage and current. Utilizing advanced switching power control technology and components, it offers high efficiency, light weight, energy saving, and environmental protection.

East Tester ETP3003A DC Power Supply, highlighting its small size, portability, powerful features, and ease of operation.

Figure 1: ETP3003A model emphasizing compact design and ease of use.

Comparison of ETP3003A and ETP3010B models, showing four-digit digital display and automatic CV/CC mode switching.

Figure 2: Adjustable DC Power Supply with four-digit digital display and automatic CV/CC modes.

ETP3010B model highlighting features like encoder adjustment, power display, multiple protection, USB fast charging (optional), low ripple/noise, series parallel connection, multi communication, and intelligent temperature control.

Figure 3: Key features of the ETP3010B model.

Diagram showing various industrial applications for the power supply, including automation equipment, power systems, medical equipment, battery/power supply production, university teaching, and product line aging.

Figure 4: Versatile applications of the DC power supply.

Function Features:

  • LED digital display, 4 digits display of voltage, and current.
  • Auto switching mode between CV and CC, with indicator light prompt.
  • Over voltage, over current, over power, over temperature protection.
  • Shortcut parameter storage/call function.
  • Communication port: RS232 to realize remote control.
  • Intelligent cooling fan with energy saving.
  • Encoder adjustment, allowing specified numbers to be adjusted accurately.

2. Setup

2.1 Front Panel Overview

Diagram of the ETPA front panel with labeled controls: Voltage display, Current display, Power switch, Direction keys and Enter keys, Quick parameter storage (M1), Voltage setting (V-Set), Current setting (I-Set), Output negative pole, Protective Earth, Output positive pole, Current and voltage adjustment knob.

Figure 5: ETPA Front Panel Key Description.

  1. Voltage display: Shows the output voltage; Unit: V.
  2. Current display: Shows the output current; Unit: A.
  3. CC indicator light: On when the power supply is in CC mode.
  4. CV indicator light: On when the power supply is in CV mode.
  5. Power button: To turn on/off the power supply.
  6. Up/Down Arrow Keys: In setting state, short press to increment/decrement the flashing cursor value. Long press to enter LED brightness adjustment mode.
  7. "OK" Key: Confirmation key.
  8. Left Arrow Key: Moves the selected cursor position or adjusts brightness of digital tubes.
  9. Right Arrow Key: Moves the selected cursor position or adjusts brightness of digital tubes.
  10. "I-Set" Key: Short press to enter current setting state.
  11. "V-Set" Key: Short press to enter voltage setting state.
  12. "M1" Key: Shortcut parameter storage/call function key. Short press to preset arbitrary voltage/current values. Long press to save current voltage/current values to M1.
  13. Adjusted knob: Sets voltage/current values (counterclockwise for minus, clockwise for plus).
  14. Output Positive Terminal: Positive Output Terminal (+) of power supply.
  15. Ground Terminal: Connects the ground terminal to the housing of the power supply.
  16. Output Negative Terminal: Negative Output Terminal (-) of power supply.

2.2 Back Panel Overview

Diagram of the ETP rear panel with labeled components: Fan vent, RS232 interface (Optional RS485), USB interface (Optional), Power outlet, Fuse box.

Figure 6: ETP Back Panel Description.

  1. Fan vent: Used for internal heat dissipation and intelligent temperature control adjustment.
  2. Communication port: RS232, DB9 female port.
  3. Power socket: With fuse, ACV input interface.

2.3 Connecting the Power Supply

Ensure the power supply is off before making any connections. Connect the power plug to the power socket on the back panel. Connect the test lines to the output terminals (positive, negative, and ground) on the front panel. Connect the other end of the test lines to your load.

Image showing the ETP3003A power supply connected to an external load (ET5410A+ electronic load) using red and black test leads.

Figure 7: Example connection of the power supply to a load.

3. Operating Instructions

3.1 Stabilized Voltage Output (CV Mode)

The power supply provides two output modes: voltage stabilized output (CV) and current stabilized output (CC).

Example (Model ETP6005A): When voltage is set to 30V and current to maximum rating of 5A, with a load of 10Ω/300W. Since 30V/10Ω = 3A < 5A, the power supply operates in CV mode, outputting 30V and 3A.

Operation Steps:

  1. Connect to load as shown in Figure 7.
  2. Turn on the power supply using the power button.
  3. Voltage setting: Short press "V-SET". The voltage display interface will flash. Adjust the knob to set the desired voltage (e.g., 30V). Press "OK" or take no action to confirm.
  4. Current setting: Short press "I-SET". The current display interface will flash. Adjust the knob to set the desired current (e.g., 5A). Press "OK" or take no action to confirm.

Tip: In CV mode, if the output current exceeds the set value due to load changes, the device will switch to CC mode, and the output voltage will be reduced proportionally. To restore CV mode, increase the current setting value.

3.2 Stabilized Current Output (CC Mode)

Example (Model ETP6005A): When voltage is set to 10V and current to 5V (max value), with a load of 1Ω/300W. Since 10V/1Ω = 10A > 5A, the power supply operates in CC mode, outputting 5V and 5A.

Operation Steps:

  1. Connect to load as shown in Figure 7.
  2. Turn on the power supply using the power button.
  3. Voltage setting: Short press "V-SET". The voltage display interface will flash. Adjust the knob to set the desired voltage (e.g., 10V). Press "OK" or take no action to confirm.
  4. Current setting: Press "I-SET". The current display interface will flash. Adjust the knob to set the desired current (e.g., 5A). Press "OK" or take no action to confirm.

Tip: In CC mode, if the output voltage exceeds the set value due to load changes, the device will switch to CV mode, and the output current will be reduced proportionally. To restore CC mode, increase the voltage setting value.

4. Maintenance

To ensure optimal performance and longevity of your power supply, regular maintenance is recommended.

  • Ventilation: Ensure the fan vent on the back panel (Figure 6) is clear of obstructions to allow for proper internal heat dissipation.
  • Cleaning: Keep the unit clean and free from dust. Use a soft, dry cloth for cleaning. Do not use liquid cleaners or solvents.
  • Storage: When not in use for extended periods, store the power supply in a cool, dry environment with humidity below 80%RH.

5. Troubleshooting

This section provides guidance on common operational observations. For more complex issues, please refer to the full user manual PDF or contact support.

  • Unexpected Mode Switching (CV/CC): The device automatically switches between CV and CC modes based on the load and set parameters. If the output current in CV mode exceeds the set current, it will switch to CC. If the output voltage in CC mode exceeds the set voltage, it will switch to CV. Adjust the corresponding voltage or current setting to return to the desired mode.
  • No Output: Ensure the power supply is properly connected to a power source and the power button is pressed. Check the fuse in the power socket on the back panel.
  • Display Issues: If the digital display is dim, adjust the brightness using the up/down arrow keys (long press to enter brightness adjustment mode).

6. Specifications

Index ETP1503A ETP1506A ETP3003A ETP3005A ETP3010A ETP6003A ETP6005A
Output voltage 0~15V 0~15V 0~30V 0~30V 0~30V 0~60V 0~60V
Output current 0~3A 0~6A 0~3A 0~5A 0~10A 0~3A 0~5A
Output power 45W 90W 90W 150W 300W 180W 300W
Steady state Voltage stability ≤0.1%±3mV; Load stability: ≤0.1%±3mA
Steady state Current stability ≤0.1%±3mV; Load stability: ≤0.1%±3mA
Display accuracy Voltage: 0.5%±3 readings; Current: 0.5%±3 readings
Ripple and noise VPP≤1%
Display Resolution Voltage: max 10mV; Current: Max 1mA; Power: Max 10mW
Display method 4 digits red LED display, 0.40 inches
Power supply AC 220V±10%/50Hz or AC 110V±10%/60Hz (if 110V, users need to talk to factory in advance)
Operating environment Indoor, altitude: <=2000m, temperature: 5~40°C, humidity: 10~85%RH
Storage environment Temperature: -20~80°C, humidity: <=80%RH
Product size 190mm* 70mm* 130mm (L*W*H)
Net weight 1.1kg
Fuse specification 3A

Note: The above parameters are measured at an ambient temperature of 25±5°C, relative humidity <80%RH, and after preheating for 30 minutes. Actual parameters may vary slightly.

Additional Models Specifications:

Model ETP1506B ETP1520B ETP3005B ETP3010B ETP6003B ETP6005B ETP10003B ETP15002B
Output voltage 0~15V 0~15V 0~30V 0~30V 0~60V 0~60V 0~100V 0~150V
Output current 0~6A 0~20A 0~5A 0~10A 0~3A 0~5A 0~3A 0~2A
Output power 90W 300W 150W 300W 180W 300W 300W 300W
Product size 190mm* 115mm* 150mm (L*W*H)
Net weight 1.3kg

7. Accessories

The product package includes the following items:

Image showing the packing list: 1. Power host, 2. Certificate, 3. Instruction Manual, 4. Test line, 5. Power plug.

Figure 8: Packing List.

  • User manual x 1
  • Qualified certificate x 1
  • Power plug x 1
  • Test line x 1 set

Communication

The product supports RS232 communication mode. The DB9 female connector has two TXD pins, three RXD pins, and five GND pins.

Communication Parameters:

  • Baud rate: 9600
  • Start bit: 1
  • Data bit: 8
  • Calibration bit: /
  • Stop bit: 1
  • Footer: 0x0A (newline) or 0x0D0A (CRLF)

8. User Tips

No specific user tips were available from provided reviews or Q&A content. Always refer to the detailed instructions for safe and effective use.

9. Warranty and Support

For detailed warranty information, technical support, or service inquiries, please refer to the complete user manual PDF or contact the manufacturer directly.

User Manual (PDF): A comprehensive user manual in PDF format is available for download. It contains detailed instructions, safety guidelines, and advanced features not covered in this summary. You can access it via the following link: East Tester ETP3000A Series User Manual (PDF)

Manufacturer Contact:

  • Hangzhou Zhonghcuang Electron Co., Ltd
  • Zhejiang Easttester Measurement&Control Technology Co., Ltd
  • Website: http://www.easttester.com

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