KORAD KA3010D Programmable Precision Variable Adjustable DC Power Supply User Manual

1. Product Overview

The KORAD KA3010D is a high-precision, programmable DC power supply designed for laboratory and industrial applications. It offers stable and adjustable voltage and current outputs with advanced features for reliable operation.

Figure 1: KORAD KA3010D DC Power Supply with included accessories.

Key Features:

• High Accuracy & Resolution: 10mV / 1mA resolution for precise control.
• Low Noise & Ripple: Ensures clean power output for sensitive applications.
• Constant Voltage (CV) / Constant Current (CC) Mode: Automatically switches between modes based on load.
• Protection Features: Highly reliable Over-Voltage Protection (OVP) and Over-Current Protection (OCP) with arbitrarily set thresholds.
• Memory Function: Built-in storage for 5 user-programmable preset settings (M1-M5).
• Output Control: Independent output switch control.
• Keypad Lock: Prevents accidental changes during operation.
• Intelligent Cooling: Temperature-controlled fan effectively reduces noise.
• Connectivity: USB/RS232 interfaces for remote control (P-models only).

2. Safety Instructions

Please read and understand all safety instructions before operating the device to ensure personal safety and prevent damage to the equipment.

Safety Symbols:

• WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
• DANGER High Voltage: Indicates the presence of dangerous voltage levels.
• Earth (ground) Terminal: Indicates a protective earth ground connection.

General Safety Guidelines:

1. The power supply voltage must match the operating voltage of the device. Voltage mismatch may damage the device or cause it to malfunction.
2. Ensure the power supply polarity is correct. Reversed polarity may damage the device or cause the power supply to malfunction.
3. 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.
4. Ensure good ventilation for the power supply. Avoid blocking the power supply's ventilation holes during use to prevent overheating or safety hazards.
5. Avoid operating the power supply under overload conditions for extended periods. Exceeding the rated load may damage or malfunction the power supply.
6. Do not disassemble or modify the power supply arbitrarily. Refer servicing to qualified personnel.
7. Avoid exposing the power supply to water or humid environments. This may cause short circuits, electric shocks, and other safety problems.
8. 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.

3. Front Panel Introduction

The front panel provides all necessary controls and displays for operating the power supply.

Figure 2: Front view of the KORAD KA3010D control panel.

Display:

• Voltage Display (V): Shows the setup value of the output voltage.
• Current Display (A): Shows the setup value of the output current.

Condition Indicators:

• OVP (Over-Voltage Protection): Lights when OVP is active. If output voltage exceeds the set protection value, output cuts off and OVP indicator flickers. Press OVP button to recover.
• OCP (Over-Current Protection): Lights when OCP is active.
• C.C (Constant Current): Lights when the power supply is operating in constant current mode.
• C.V (Constant Voltage): Lights when the power supply is operating in constant voltage mode.
• OUT (Output): Lights when there is voltage output from the terminals.

Control Buttons:

• M1-M4 (Memory Recall/Save): Buttons to save and recall up to 4 preset panel settings.
• LOCK: Locks the front panel buttons to prevent accidental changes. Press for 2 seconds to lock/unlock.
• BEEP: Toggles the beep sound on/off. Press OCP button for 2 seconds to toggle.
• OCP: Over-Current Protection on/off.
• OVP: Over-Voltage Protection on/off.
• Off/On: Output On/Off switch.
• ADJUST Knob: Rotary encoder for adjusting voltage and current values.
• < / > Buttons: Digit selector buttons for fine adjustment.
• Voltage/Current Button: Toggles between voltage and current adjustment mode.
• POWER Button: Main power switch.
• Output Terminals (+, -, GND): Red (+) for positive, Black (-) for negative, Green (GND) for ground.

4. Rear Panel Introduction

The rear panel houses the power input, cooling fan, and communication interfaces.

Figure 3: Rear view of the KORAD KA3010D, showing power input and fan.

• USB Interface: For remote control (P-models only).
• RS232 Interface: For remote control (P-models only).
• Fan: Cooling fan to prevent overheating.
• Power Socket: AC power input (220V +/-10%, 50-60Hz).
• Fuse Holder: Contains the main fuse. Ensure correct fuse type (T5A/250V for 220/230V operation).

5. 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 socket on the rear panel, ensuring the correct voltage (220V) is selected.
2. Connect your load to the front panel output terminals: Red (+) for positive, Black (-) for negative. Ensure correct polarity.

6. Operation

Power-On and Initial Settings:

1. Press the POWER button to turn on the power supply. The display will initialize, showing the model and then the last saved settings.
2. Observe whether the indicator lights illuminate normally.
3. Slowly adjust the output voltage and current according to your equipment requirements using the ADJUST knob and Voltage/Current button.

Setting Output Voltage and Current:

1. Press the Voltage/Current button to switch between voltage and current adjustment modes. The corresponding display will blink.
2. Use the ADJUST knob to set the desired value.
3. For fine adjustment, use the < and > buttons to select the digit to adjust, then use the ADJUST knob.
4. Once set, press the Off/On button to enable the output. The OUT LED will illuminate, and the unit will display CV or CC mode.

Saving and Recalling Settings:

The KA3010D allows you to save and recall up to 4 sets of panel settings (M1-M4).

• To Save: Adjust the voltage and current to your desired values. Press one of the M1-M4 buttons for 2 seconds until the corresponding LED lights up. The settings are automatically saved.
• To Recall: Press the desired M1-M4 button briefly. The saved settings will be recalled, and the output will automatically turn off.

Output On/Off:

Press the Off/On button to toggle the output on or off. The OUT indicator light shows the output status.

Beep On/Off:

By default, the beep sound is enabled. To toggle it, press the OCP (BEEP) button for 2 seconds. A beep will confirm the change.

Front Panel Lock:

To lock the front panel buttons, press the LOCK button for 2 seconds. To unlock, press it again for 2 seconds.

7. Remote Control (P-models only)

For models with the 'P' suffix (e.g., KA3010P), the power supply can be controlled remotely via USB or RS232 interfaces.

Entering Remote Control Mode:

1. Connect the USB cable from the power supply to your computer.
2. The power supply will automatically connect. After a normal connection, you will hear a tweet from the power supply.
3. The panel buttons will be locked, and the power supply can only be controlled by the computer.

Note: KORAD software must be installed first on your computer.

COM Port Settings (for PC):

• Baud rate: 9600
• Parity bit: None
• Data bit: 8
• Stop bit: 1
• Data flow control: None

Functionality Check:

To verify communication, send the query command *IDN? via a terminal application (e.g., MTTTY). The device should return identification information like "Manufacturer, model name, software version".

Exiting Remote Control Mode:

1. Close the remote control software on your computer.
2. Disconnect the USB cable from the power supply.
3. The power supply will disconnect, indicated by a beep, and automatically return to panel control mode.

8. 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:

When storing the device, first turn off the load, adjust the power supply output voltage to the minimum value, and finally disconnect the AC input.

• Storage Temperature: 32-158 ℉ (0-70 ºC)
• Storage Humidity: < 70%RH
• Store in an indoor environment, away from direct sunlight and excessive dust.

9. Troubleshooting (FAQ)

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

A1: The panel is likely locked. Press the UNLOCK button for over 2 seconds to unlock it.

Q2: Pressing ON/OFF, there is no output.

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

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

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

Q4: OCP is on, and the output is automatically shut off.

A4: The current protection value setup is too small. Adjust the OCP threshold to a higher value.

10. Specifications

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

11. Warranty & Support

This product is manufactured by Shenzhen Hua Xin Electronic Trading Co., Ltd. KORAD Technology continuously improves its products and reserves the right to change specifications, equipment, and maintenance procedures at any time without notice.

For detailed information regarding warranty, service, and support, please refer to the official user manual PDF:

View Full User Manual (PDF)

Manufacturer Contact Information:

• Manufacturer: Shenzhen Hua xin Electronic Trading Co., Ltd.
• Address: 6B, Building 6, Longbi Industrial Zone, Bantian Street, Longgang District, Shenzhen, Guangdong, China.
• Website: www.koradtechnology.com