KORAD KD3000-6000 Series Digital Control DC Power Supply

Overview

This document provides operational details for the KORAD KD3000-6000 series digital control DC power supplies.

Manufacturer: Shenzhen Korad Technology Co., Ltd.

Address: 3rd Floor, Building A4, Block 3, Songbai Industrial Park, Gongming Town, Guangming New District, Shenzhen, China

Contact: Phone: 0755-6153 5026, Fax: 0755-6153 5025, Email: krissy@koradtechnology.com, Website: www.koradtechnology.com, www.korad.com.cn

Key Features

Digital control DC power supply
Compact and portable design
Coarse and fine adjustment for voltage and current
Digital potentiometer control
4-digit high-precision display
Software calibration
Overcurrent protection (OCP) function
Front panel lock function

Safety Guidelines

Do not block or obstruct the air inlets and fan vents.
Avoid severe impact or improper usage that may damage the unit.
Do not expose the unit to static discharge.
Unauthorized personnel should not attempt to open the unit.

AC Input

AC input voltage: 220V / 230V, 50 / 60Hz
Ensure the protective ground wire is connected to earth to prevent electric shock. ⚠️

Fuse Replacement

Fuse Types by Model:

Model	Input Voltage (220V/230V)
KD3005D	T3A/250V
KD3005P	T3A/250V
KD6005D	T5A/250V
KD6005P	T5A/250V

Ensure the correct fuse model and rating is used before powering on.
To prevent fire hazards, replace fuses only with the specified type and rating.
Disconnect the power cord before replacing the fuse to avoid electric shock.
Determine the cause of a blown fuse before replacing it.

Control Commands

Command Syntax

Command format: [Command]<X>:<Parameter>

Where:

[Command]: The command name (e.g., ISET, VSET).
<X>: Output channel (1 for CH1, 2 for CH2).
:: Separator.
<Parameter>: The value for the command.

Parameter types:

<Boolean>: 0 (Off) or 1 (On).
<NR1>: Integer.
<NR2>: Floating-point number (e.g., 0.1, 3.14, 8.5).

Note: All commands should be entered in uppercase.

Command Details

BEEP [beep]: Enable or disable the buzzer. Example: BEEP1 to turn on the buzzer.
OUT [output]: Enable or disable the output. Example: OUT1 to enable output for CH1.
STATUS? [status]: Read the operating status of the unit. The status is returned as an 8-bit value.
*IDN? [identify]: Request identification information. Example: *IDN? will return the model and software version (e.g., KD3005P, VXX).

Setting Voltage and Current

ISET<X>:<NR2>: Set the output current for channel X. Example: ISET1: 2.23 sets the current for CH1 to 2.23A.
ISET<X>?: Read back the set current value for channel X. Example: ISET1? returns the set current for CH1.
VSET<X>:<NR2>: Set the output voltage for channel X. Example: VSET1:20.34 sets the voltage for CH1 to 20.34V.
VSET<X>?: Read back the set voltage value for channel X. Example: VSET1? returns the set voltage for CH1.

Reading Output Status

IOUT<X>?: Read the actual output current for channel X. Example: IOUT1? returns the actual output current for CH1.
VOUT<X>?: Read the actual output voltage for channel X. Example: VOUT1? returns the actual output voltage for CH1.

STATUS? Bit Definitions

Bit	Content	Description
0	CH1	0=CC mode, 1=CV mode
1	CH2	0=CC mode, 1=CV mode
2,3	Tracking	01=Independent, 11=Series, 10=Parallel
4	Beep	0=Off, 1=On
5	OCP	0=OCP Off, 1=OCP On
6	Output	0=Off, 1=On
7	OVP	0=OVP Off, 1=OVP On

Remote Control and Interfaces

COM Settings (for KD3005P & KD6005P)

Configure PC COM port settings as follows:

Baud Rate: 9600
Parity: None
Data Bits: 8
Stop Bits: 1
Flow Control: None

RS232 Interface Definition

The KD3005P DC Power Supply features an RS232 interface for remote control. The connection to a PC typically uses a standard serial cable with the following pin mapping:

Power Supply Pin 2 (RX) connects to PC Pin 2 (TX)
Power Supply Pin 3 (TX) connects to PC Pin 3 (RX)
Power Supply Pin 5 (GND) connects to PC Pin 5 (GND)

Function Detection

To query the device's identification information (model and software version), send the command *IDN?. For example, the response might be KD3005PVx.xx.

Front Panel Operation

Status Indicators

OCP [overcurrent-protection]: Indicates Overcurrent Protection status.
C.C [constant-current]: Indicates Constant Current mode.
C.V [constant-voltage]: Indicates Constant Voltage mode.
LOCK [lock]: Indicates the panel lock function is active.

Knob Operation Instructions

Voltage Knob [voltage]

Press the voltage knob to make the voltage display flash. Adjust the knob to change the output voltage. Press the knob again to switch between coarse and fine adjustment steps. Press and hold the voltage knob for 3 seconds to activate the panel lock function (the LOCK indicator will light up). Press and hold for another 3 seconds to disable the lock.

Current Knob [current]

Press the current knob to make the current display flash. Adjust the knob to change the output current. Press the knob again to switch between coarse and fine adjustment steps. Press and hold the current knob for 2 seconds to enable Overcurrent Protection (OCP) (the OCP indicator will light up). If the load current exceeds the set limit, the output will shut down. Release the load and press the current knob again to resume output. Press and hold for 2 seconds again to disable OCP.

Remote Control Knob Behavior (KD3005P & KD6005P)

For models with remote control interfaces (KD3005P & KD6005P), when the panel is locked, the power output is disabled. The CURRENT knob then functions as an output switch (ON/OFF). Pressing the CURRENT knob toggles the power output on or off. Pressing both the Voltage and Current knobs simultaneously for 1 second will change the adjustment mode: either direct knob adjustment for voltage/current or the knob acting as an ON/OFF switch.

Power On

Press the [power] button to turn on the power supply. The display will initialize and show the parameters set during the last shutdown.

Specifications

Specifications are measured after 20 minutes of warm-up at an ambient temperature of 25℃ ± 5℃.

Models	KD3005D	KD3005P	KD6005D	KD6005P
Voltage	0-30V	0-30V	0-60V	0-60V
Current	0-5A	0-5A	0-5A	0-5A
Load Regulation
Voltage	≤0.01%+2mV	≤0.01%+2mV	≤0.01%+2mV	≤0.01%+2mV
Current	≤0.1%+10mA	≤0.1%+10mA	≤0.1%+10mA	≤0.1%+5mA
Line Regulation
Voltage	≤0.01%+3mV	≤0.01%+3mV	≤0.01%+3mV	≤0.01%+3mV
Current	≤0.1%+3mA	≤0.1%+3mA	≤0.1%+3mA	≤0.1%+3mA
Setup Resolution
Voltage	10mV	10mV	10mV	10mV
Current	1mA	1mA	1mA	1mA
Setup Accuracy (25°C ± 5°C)
Voltage	≤0.5%+20mV	≤0.5%+20mV	≤0.5%+20mV	≤0.5%+30mV
Current	≤0.5%+10mA	≤0.5%+10mA	≤0.5%+10mA	≤0.5%+5mA
Ripple (20-20MHz)
Voltage	<2mVrms	<2mVrms	<2mVrms	<1mVrms
Current	≤3mArms	≤3mArms	≤3mArms	≤3mArms
Temp. Coefficient
Voltage	≤150ppm	≤150ppm	≤150ppm	≤150ppm
Current	≤150ppm	≤150ppm	≤150ppm	≤150ppm
Read Back
Voltage	10mV	10mV	10mV	10mV
Current	1mA	1mA	1mA	1mA
Read Back Temp. Coefficient
Voltage	≤150ppm	≤150ppm	≤150ppm	≤150ppm
Current	≤150ppm	≤150ppm	≤150ppm	≤150ppm

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