KORAD KA3005 Series Digital Programmable DC Power Supply

1. Product Overview

The KORAD KA3005 series offers high-precision digital-control DC power supplies designed for laboratory and professional use. These units provide stable voltage and current output with low noise and ripple. The series includes models with and without PC connectivity for enhanced control.

Model Differences:

• 'D' Models (e.g., KA3005D, KA3005DS): These are standard digital-control models without RS232 or USB interfaces, meaning they cannot be connected to a computer for software control.
• 'P' Models (e.g., KA3005P, KA3005PS): These are programmable models equipped with RS232 and USB interfaces, allowing for software control and remote operation via a computer.

Main Features:

• 30V/5A full digital power control
• 10mV/1mA high accuracy and resolution
• Low noise and ripple
• Constant Voltage (CV) and Constant Current (CC) modes
• Highly reliable Over-Current Protection (OCP) and Over-Voltage Protection (OVP), with arbitrarily set protection limits
• Built-in memory for 5 user-programmable preset settings
• Output switch control
• Power and memory function
• Keypad lock to prevent misuse
• Intelligent temperature control fan for effective noise reduction
• Easy alternative to traditional digital power supplies

2. Safety & Warnings

WARNING: Failure to follow these safety instructions may result in injury or damage to the device.

• The power supply voltage must match the operating voltage of the device. Voltage mismatch may damage the device or cause it to malfunction.
• Ensure the power supply polarity is correct. Reversed polarity may damage the device or cause the power supply to malfunction.
• Ensure the power supply's current output meets the device's requirements. If the power supply cannot provide sufficient current, the device may not function properly.
• Ensure good ventilation for the power supply. Avoid blocking the power supply's ventilation holes during use to prevent overheating or safety hazards.
• Avoid operating the power supply under overload conditions for extended periods. Exceeding the rated load may damage or malfunction the power supply.
• Do not disassemble or modify the power supply arbitrarily. Refer servicing to qualified personnel.
• Avoid exposing the power supply to water or humid environments. This may cause short circuits, electric shocks, and other safety problems.
• To ensure fire protection, replace the fuse only with the specified type and rating. Disconnect the power cord before fuse replacement. Make sure the cause of fuse blowout is fixed before fuse replacement.

Safety Symbols:

• A WARNING: Indicates a potential hazard that could result in injury or death.
• DANGER High Voltage: Indicates the presence of dangerous voltage levels.
• Earth (ground) Terminal: Indicates a connection point for protective earth ground.

3. Setup

Pre-Power-On Checks:

1. Confirm that the power input (e.g., 220V AC outlet) and output (e.g., terminal block) are correctly connected to avoid short circuits or reverse connections.
2. Check that the output voltage/current adjustment knob is at its minimum value (to prevent output overload during power-on).
3. If the power supply is equipped with a cooling fan, ensure the ventilation openings are unobstructed to prevent overheating.

Connecting the Power Supply:

1. Connect the AC power cord to the power input socket on the rear panel. Ensure the correct voltage (110V/120V or 220V/230V, 50/60Hz) is selected if applicable.
2. Connect the protective grounding conductor of the AC power cord to an earth ground to avoid electrical shock.
3. Connect the load device to the front output terminals: red (+) for positive, black (-) for negative, and green (GND) for ground.

4. Operating Instructions

Power-On and Parameter Settings:

1. Press the power switch on the front panel to turn on the unit. The display will initialize, showing the model, then the last saved settings.
2. Observe whether the indicator lights illuminate normally.
3. To set output voltage and current:
   • Press the 'Voltage/Current' button to select either voltage or current adjustment. The corresponding display (V or A) will blink.
   • Turn the 'ADJUST' knob to change the value.
   • Use the '<' and '>' buttons for coarse and fine adjustment modes.
4. Press the 'Off/On' button to enable the output. The button LED will turn on, and the display will show CV or CC mode.
5. Slowly adjust the output according to the equipment requirements.

Output On/Off:

• Press the 'Off/On' button to toggle the output on or off. The button LED indicates the output status.
• Note: The output will automatically turn off if:
  • OVP is active and an unusual OVP condition occurs at the output terminal.
  • The set voltage exceeds the OVP threshold.
  • Another setup is recalled from memory.

Beep On/Off:

• By default, the beep sound is enabled. To turn it off, press and hold the 'OCP (BEEP)' button for 2 seconds. A beep will confirm the change.
• To re-enable the beep, press and hold the 'OCP (BEEP)' button again for 2 seconds.

Front Panel Lock:

• To lock the front panel buttons, press and hold the 'LOCK' button for 2 seconds. This prevents accidental changes to settings.
• To unlock, press and hold the 'LOCK' button again for 2 seconds.

Save/Recall Setup:

The power supply allows saving and recalling up to 5 user-programmable preset settings (M1-M5).

• Saving Settings: After adjusting voltage and current, press one of the 'M1' through 'M5' buttons. The LED light for the selected memory slot will turn on. The settings are automatically saved once the display stops blinking.
• Recalling Settings: Press one of the 'M1' through 'M5' buttons. The panel settings saved in that memory slot will be recalled, and the corresponding LED will turn on.
• Note: When a setting is recalled, the output automatically turns off.

Remote Control (P Models Only):

For 'P' models (e.g., KA3005P, KA3005PS) with RS232/USB interfaces, the unit can be controlled via a computer.

1. Entering Remote Control Mode:
   • Connect the USB cable from the power supply to your computer.
   • The power supply will automatically connect. A short 'tweet' sound from the unit indicates a successful connection.
   • The front panel buttons will be locked, and control will be transferred to the computer software.
   • Note: KORAD software must be installed on the computer first.
2. Exiting Remote Control Mode:
   • Close the remote control software on your computer.
   • Disconnect the USB cable from the power supply.
   • The power supply will emit a 'tweet' sound, indicating that remote control has ended.
   • The power supply will automatically return to front panel control mode.

5. Maintenance & Storage

Maintenance:

1. Regularly clean the dust from the power supply surface.
2. Check if the wiring terminals are loose to avoid poor contact.

Storage:

1. First, turn off the load device.
2. Then, adjust the power supply output voltage to the minimum value.
3. Finally, disconnect the AC input.
4. Store the unit in a dry, dust-free indoor environment with relative humidity below 70% and temperature between 32-158 ℉ (0-70 ºC).

6. Troubleshooting (FAQ)

Common Issues and Solutions:

Q1: The panel buttons don't work when powered on.

A1: The panel is locked. Press and hold the 'UNLOCK' button for over 2 seconds to unlock the panel.

Q2: Pressing 'Off/On' button, there is no output.

A2: Check if the current setup is 0. Increase the current setting.

Q3: Output voltage rises slowly when the output button is on.

A3: The current setup might be too small. Increase the current setting.

Q4: OCP is active and the output automatically shuts off.

A4: The current protection value (OCP) might be set too low. Adjust the OCP setting to a higher value.

Q5: What is the difference between 'D' and 'P' models?

A5: 'D' models are standard digital-control and are not programmable. 'P' models are programmable and include RS232/USB interfaces for computer control.

Q6: Can this device charge batteries?

A6: Yes, it can charge batteries, but you will need a suitable battery holder or adapter.

Q7: Is this a UK 220-230V voltage unit?

A7: The input voltage is typically 220V +/-10% (50-60Hz). Some models may support 110V/120V. Always check the label on your specific unit.

Q8: Is this a pulse or linear (transformer-based) power supply?

A8: This is a linear power supply, known for low ripple and noise.

7. Specifications

The specifications below are tested under conditions of temperature 25°C ±5°C and a warm-up period of 20 minutes.

A detailed user manual in PDF format is available for download. Please refer to the seller's product page for the link to the PDF document: User Manual (PDF).

8. Warranty & Support

Manufacturer Information:

Manufacturer: Shenzhen Hua xin Electronic Trading Co., Ltd.

Address: 6B, Building 6, Longbi Industrial Zone, Bantian Street, Longgang District, Shenzhen, Guangdong, P.R.China.

Tel: +86-755-61535026

Fax: +86-755-61535025

Email: krissy@koradtechnology.com

Website: www.koradtechnology.com, www.korad.com.cn

EU Authorized Representative:

Name: eVatmaster Consulting GmbH

Address: Bettingastr 3060325 Frankfurt am Main, Germany

Phone number: 49-6995179070

Email: contact@evatmaster.com

The proprietary information in this manual is protected by copyrights. Any photocopies, reproductions or translation to another language are not allowed unless it is permitted by KORAD Technology officially. And all rights are reserved. KORAD will continuously improve products and reserve the rights to change specifications, equipment, and maintenance procedures at any time without notice.

9. User Tips

• Included Accessories: Many users appreciate the quality of the included test leads and probes. These are often described as very conductive and sharp-tipped, making them suitable for immediate use.
• Packaging: The product typically arrives well-packaged, often in multiple layers, ensuring good protection during transit.
• Initial Testing: The power supply is generally reported to work perfectly right out of the box, even without extensive adjustments.
• Battery Charging: While the power supply can be used to charge batteries, a separate battery holder or adapter will be required.