KORAD KD3005D
KORAD KD3005D Precision Variable DC Power Supply
Manual d’instruccions de l’usuari
Introducció
This manual provides detailed instructions for the safe and efficient operation of your KORAD KD3005D Precision Variable Adjustable 30V, 5A DC Linear Power Supply. Please read this manual thoroughly before using the device to ensure proper functionality and to prevent damage.

Figure 1: KORAD KD3005D Precision Variable DC Power Supply with included test leads.
Unit Features and Overview
The KORAD KD3005D is a heavy-duty, single-channel linear power supply designed for precision applications in labs, colleges, and production environments. It offers continuously adjustable voltage and current with low ripple and noise, high reliability, and high accuracy.
Característiques principals:
- Disseny compacte: Space-saving form factor suitable for various workspaces.
- Pantalles LED de 4 dígits duals: Bright and easy-to-read displays for precise voltage i valors actuals.
- Controls digitals: Precise rotary encoders for dialing in exact settings.
- Switchable Power Input: Supports both 110V and 220V power inputs, selectable via a switch on the rear panel.
- Protecció de circuits: Built-in protection against overload, short circuit, and over temperature.
- Automatic mA/A Display Switching: Automatically switches between milliampere i ampere display for convenience.
- Panel Lock Feature: Evita canvis no desitjats a la configuració durant el funcionament.
Tauler frontal sobreview:

Figura 2: Detallada view of the KORAD KD3005D front panel, indicating controls and indicators.
El panell frontal inclou:
- Voltage/Current Display: Mostra el volum de sortida en temps realtage i corrent.
- Voltage Botó d'ajust: Digital encoder for setting output voltage, with push function for fine/coarse adjustment and lock/unlock.
- Botó d'ajust de corrent: Digital encoder for setting output current, with push function for fine/coarse adjustment and OCP (Over-current Protection) on/off.
- Interruptor d'alimentació: Encén i apaga la unitat.
- Terminals de sortida: Red (+) for positive, Black (-) for negative, Green (GND) for earth ground.
- Indicadors: OCP (Over-current Protection Active), C.C (Constant Current Mode), C.V (Constant Voltage Mode), LOCK (Front Panel Lock Indicator).
Configuració
- Desembalatge: Carefully remove the power supply from its packaging. Verify that all components are present: the KD3005D Power Supply unit, power cord, 5 Amp test leads, and this user manual.
- Col·locació: Place the unit on a stable, flat surface with adequate ventilation. Ensure that the rear fan vent is not obstructed.
- Entrada Voltage Selecció: Before connecting the power cord, check the voltage selector switch on the rear panel. Ensure it is set to your local mains voltage (110V or 220V). Incorrect setting can damage the unit.
- Connexió d'alimentació: Connect the provided power cord to the AC input socket on the rear panel of the power supply, then plug the other end into a grounded wall outlet.
- Connexions de sortida: Connect the test leads to the output terminals on the front panel. The red lead connects to the red (+) terminal, the black lead to the black (-) terminal. The green (GND) terminal is for earth ground connection, often connected to the negative terminal for common ground applications.

Figure 3: Rear panel showing the input voltage selector switch and power input.
Instruccions de funcionament
The KD3005D operates in either Constant Voltage (CV) or Constant Current (CC) mode, automatically switching between them based on the load and set limits.
Funcionament bàsic:
- Encès: Press the power switch on the front panel to turn on the unit. The LED displays will illuminate.
- Configuració Voltage:
- Gira el Voltage Perilla d'ajust to set the desired output voltage.
- Push the knob to switch between coarse and fine adjustment modes. Coarse adjustment changes voltage in larger steps, while fine adjustment allows for precise tuning (0.01V increments).
- The display will show the set voltage while adjusting, then revert to the actual output voltage.
- Setting Current Limit:
- Gira el Botó d'ajust actual to set the maximum output current (current limit).
- Push the knob to switch between coarse and fine adjustment modes.
- It is recommended to set the current limit slightly above the expected current draw of your circuit to provide protection against overcurrent.
- Càrrega de connexió: Una vegada voltage and current limits are set, connect your device or circuit to the output terminals using the test leads.
- Sortida de monitorització: The LED displays will show the real-time output voltage and current being delivered to your load. The C.V (Constant Voltage) or C.C (Constant Current) indicator will light up to show the current operating mode.
Característiques avançades:
- Bloqueig del panell: To prevent accidental changes to settings, push and hold the Voltage Perilla d'ajust until the "LOCK" indicator illuminates on the display. To unlock, push and hold the knob again.
- Protecció contra sobreintensitat (OCP): The unit has built-in OCP. To activate a shutdown when the current limit is exceeded, push and hold the Botó d'ajust actual until the "OCP" indicator illuminates. If OCP triggers, the supply will shut down. To reset, slightly adjust the voltage knob. If OCP is not active, the unit will enter Constant Current (CC) mode and reduce voltage to maintain the set current limit.
Manteniment
Un manteniment regular garanteix la longevitat i el rendiment òptim de la vostra font d'alimentació.
- Neteja: Disconnect the power supply from the mains before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use abrasive cleaners or solvents.
- Ventilació: Ensure the cooling fan and vents on the rear panel are free from dust and obstructions. The fan automatically adjusts speed based on internal temperature.
- Emmagatzematge: When not in use for extended periods, store the power supply in a cool, dry environment, away from direct sunlight and excessive dust.
- Components interns: The unit contains no user-serviceable parts. Do not attempt to open the casing. Demaneu totes les tasques de manteniment a personal qualificat.
Resolució de problemes
| Problema | Causa possible | Solució |
|---|---|---|
| La unitat no s'encén. | No power from wall outlet; Power cord not properly connected; Incorrect voltage selector setting; Internal fuse blown. | Check wall outlet with another device. Ensure power cord is securely connected. Verify voltage selector switch on rear panel matches local mains. If fuse is suspected, contact qualified service personnel. |
| Sense sortida voltage / actual. | Output terminals not connected; Voltage/current set to zero; OCP triggered; Internal fault. | Ensure test leads are connected. Verify voltage and current settings are above zero. If OCP indicator is lit, reset by slightly adjusting voltage knob. If problem persists, contact support. |
| Voltage/Current display is inaccurate. | Measurement error; Unit calibration required. | Ensure external measurement tools are calibrated. While the unit's meters are generally accurate, for critical applications, use a calibrated multimeter. If significant discrepancy, contact support. |
| Fan is noisy or constantly running. | Normal operation under load; Dust accumulation in fan/vents. | The fan speed adjusts with load and internal temperature. This is normal. Ensure vents are clear of dust. If noise is excessive or unusual, contact support. |
| Unit enters Constant Current (CC) mode unexpectedly. | Load resistance is too low; Current limit set too low for the load. | Increase the current limit setting or check the load for short circuits or very low resistance. |
Especificacions
Detailed technical specifications for the KORAD KD3005D power supply:

Figure 4: Table of KORAD KD3005D technical specifications.
| Paràmetre | Valor |
|---|---|
| Voltage Rang | 0-30V |
| Interval actual | 0-5A |
| Load Regulation (Voltage) | ≤0.01%+2mV |
| Load Regulation (Current) | ≤0.1%+10mA |
| Line Regulation (Voltage) | ≤0.01%+3mV |
| Line Regulation (Current) | ≤0.1%+5mA |
| Setup Accuracy (25°C ± 5°C) (Voltage) | ≤0.5%+20mV |
| Setup Accuracy (25°C ± 5°C) (Current) | ≤0.5%+10mA |
| Ripple (20-20M) (Voltage) | ≤2mVrms |
| Ripple (20-20M) (Current) | ≤3mVrms |
| Coeficient de temperatura (voltage) | ≤150 ppm |
| Temperature Coefficient (Current) | ≤150 ppm |
| Read Back Resolution (Voltage) | 10mV |
| Read Back Resolution (Current) | 1 mA |
| Read Back Temp. Coefficient (Voltage) | ≤150 ppm |
| Read Back Temp. Coefficient (Current) | ≤150 ppm |
| Reaction Time (Voltage Rise) | ≤100mS |
| Reaction Time (Voltage Drop) | ≤100mS |
| Interfície | No programable |
| Pes | 9.52 lliures / 4.32 kg |
| Dimensions (A x A x P) | 4.4 (W) x 6.5 (H) x 10.5 (D) inches (approx.) |
Note: Dimensions are approximate and may vary slightly. The manufacturer's stated dimensions are 14 x 10 x 10 inches, which may refer to packaging or shipping dimensions. Actual unit dimensions are closer to 4.4" (W) x 6.5" (H) x 10.5" (D).
Garantia i Suport
All Korad benchtop power supplies, including the KD3005D, come with a Garantia del fabricant de 2 anys.

Figure 5: KORAD 2-Year Warranty Seal.
For warranty claims or technical support, please contact the distributor or the manufacturer directly. Ensure you have your purchase information and product model number (KD3005D) available when seeking support.
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