KORAD Programmable DC Power Supply KD3000-6000 Series

User Manual

Main Features

Low noise
Cooling fan controlled by heatsink temperature
Constant voltage / constant current operation
Digital panel control
4 digits display
Software calibration
Over Current Protection
Button lock function
USB/RS232 for remote control

Safety Instructions

Safety Guidelines

Do not block or obstruct the cooling fan vent opening.
Avoid severe impacts or rough handling that leads to damage.
Do not discharge static electricity.
Do not disassemble unless you are qualified as service personnel.

AC Input

[!] AC Input

AC Input Voltage: 110V / 120V / 220V / 230V, 50 / 60 Hz
Connect the protective grounding conductor of the AC power cord to an earth ground to avoid electrical shock.

Operation Environment

Location: Indoor, no direct sunlight, dust free, almost non-conductive pollution.
Relative Humidity: < 80%
Altitude: < 2000m
Temperature: 32 – 104°F (0 – 40°C)

Storage Environment

Location: Indoor
Relative Humidity: < 70%
Temperature: -10 – 70°C

Fuse

[!] Fuse

Model	110/120 V	220/230 V
KD300 3	T4A/250 V	T2A/250 V
KD300 5	T5A/250V	T3A/250 V
KD600 3	T5A/250V	T3A/250 V

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.

Front Panel Description

The front panel features a digital display showing voltage and current values. It includes an adjustment knob for voltage and another for current. A power ON/OFF button is also present. Output terminals for voltage and current, along with USB and RS232 interfaces, are located on the front panel.

Condition indicators (LED Panel Lights) include:

OCP: Over Current Protection indicator. Lights up when the power supply is in OCP mode.
C.C: Constant Current indicator. Lights up when the power supply is in constant current mode.
C.V: Constant Voltage indicator. Lights up when the power supply is in constant voltage mode.
LOCK: Panel LOCK Indicator.

The voltmeter displays the setup value of the output voltage, and the ammeter displays the setup value of the output current.

Voltage and Current Adjustment Knob Operation

There are three adjustment modes for voltage and current levels: Mode 1, Mode 2, and Mode 3 (remote control mode).

Modes 1 and 2 can be shifted by pushing both the voltage and current adjustment knobs simultaneously and holding for 2 seconds.

Mode 1: LOCK Adjustment Mode

Voltage Adjustment Knob: Push the voltage adjustment knob. The voltage meter will flicker, indicating that the voltage output can be changed by rotating the knob. Pushing the knob again changes the resolution of the voltage adjustment.

Current Adjustment Knob: Push the Current Adjustment Knob. The voltage meter will flicker, allowing voltage output to be changed by adjusting the knob. Pushing the knob again when the meter flickers changes the resolution of the knob rotation. This mode will be closed.

Mode 2 & Mode 3 Operation

Mode 2: Continuous Adjustment Mode

In Mode 2, rotate the adjustment knobs directly to set the voltage and current values. The default voltage initial setting is 1V, and the default current initial setting is 100mA. Voltage and current levels can also be changed by pushing the knobs.

Operation of Over Current Protection (OCP)

Press and hold the OCP ON/OFF button for 3 seconds to activate OCP mode. The output will be cut off when the output current reaches the set value. In OCP mode, rotating the knob recovers the output. Pressing and holding the button for 3 seconds again deactivates the OCP function.

Mode 3: Remote Control Mode

Push and hold the VOLTAGE knob for 3 seconds to lock the VOLTAGE and CURRENT adjustment knobs. The output of the power supply will turn off. In this state, the CURRENT adjustment knob controls the output; pushing the CURRENT knob turns the power supply output ON and OFF. Push and hold the VOLTAGE knob again for 3 seconds to unlock the VOLTAGE and CURRENT adjustment knobs.

Power Switch and Output Terminals

POWER: Controls the main power ON/OFF.
+/- Terminals: Output voltage and current.
Ground Terminal: Connects to the ground (earth) terminal.

Specifications

Note: The specifications below are tested under conditions of 25℃ ± 5℃ and after a 20-minute warm-up.

Model	KD300 3P	KD300 5P	KD600 3P
Voltage	0-30V	0-30V	0-60V
Current	0-3A	0-5A	0-3A
Load Regulation
Voltage	≤0.01%+2mV	≤0.01%+2mV	≤0.01%+2mV
Current	≤0.1%+5mA	≤0.1%+10mA	≤0.1%+5mA
Line Regulation
Voltage	≤0.01%+3mV	≤0.01%+3mV	≤0.01%+3mV
Current	≤0.1%+3mA	≤0.1%+3mA	≤0.1%+3mA
Setup Resolution
Voltage	10mV	10mV	10mV
Current	1mA	1mA	1mA
Setup Accuracy (25℃ ± 5℃)
Voltage	≤0.5%+20mV	≤0.5%+20mV	≤0.5%+30mV
Current	≤0.5%+5mA	≤0.5%+10mA	≤0.5%+5mA
Ripple (20-20M)
Voltage	≤1mVrms	≤2mVrms	≤1mVrms
Current	≤3mArms	≤3mArms	≤3mArms
Temp. Coefficient
Voltage	≤150 ppm	≤150 ppm	≤150 ppm
Current	≤150 ppm	≤150 ppm	≤150 ppm
Read Back Resolution
Voltage	10mV	10mV	10mV
Current	1mA	1mA	1mA
Read Back Temp. Coefficient
Voltage	≤150 ppm	≤150 ppm	≤150 ppm
Current	≤150 ppm	≤150 ppm	≤150 ppm

Accessories

User manual *1
Power cord *1

Weight and Dimension

KD3003, KD3005, KD6003: 110mm(W) * 156mm(H) * 260mm(D)
KD3003: 4Kg, KD3005: 4.8Kg

Remote Control

COM Setting

Set up the COM port inside the PC according to the following list:

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

RS232 Interface Definition

The RS232 interface connects the DC Power Supply to a PC. Pin 2 on the DC Power Supply connects to Pin 3 on the PC. Pin 3 on the DC Power Supply connects to Pin 2 on the PC. Pin 5 on the DC Power Supply connects to the ground.

Functionality Check

Run the following query command via a terminal application (e.g., MTTTY):

*IDN?

This command should return identification information: Manufacturer, model name, and software version (e.g., KORAD KD3005P V2.xx).

KA Series Remote Control Syntax V2.0

Command format: VSET<X>:<NR2>

Where:

1. VSET: command header
2. X: output channel
3. : separator
4. NR2: parameter

Command Details

1. ISET<X>:<NR2>
Description: Sets the output current.
Example: ISET1:2.225
Response time: 50ms. Sets the CH1 output current to 2.225A.
2. ISET<X>?
Description: Returns the output current setting.
Example: ISET1?
Returns the CH1 output current setting.
3. VSET<X>:<NR2>
Description: Sets the output voltage.
Example: VSET1:20.50
Sets the CH1 voltage to 20.50V.
4. VSET<X>?
Description: Returns the output voltage setting.
Example: VSET1?
Returns the CH1 voltage setting.
5. IOUT<X>?
Description: Returns the actual output current.
Example: IOUT1?
Returns the CH1 output current.
6. VOUT<X>?
Description: Returns the actual output voltage.
Example: VOUT1?
Returns the CH1 output voltage.
7. OUT<Boolean>
Description: Turns on or off the output.
Boolean: 0 = OFF, 1 = ON.
Example: OUT1 Turns on the output.
8. STATUS?
Description: Returns the POWER SUPPLY status. Contents 8 bits in the following format:
Bit | Item | Description
---|---|---
0 | CH1 | 0=CC mode, 1=CV mode
1,2,3,4,5 | N/A | N/A
6 | Output | 0=Off, 1=On
7 | N/A | N/A
9. *IDN?
Description: Returns the KA3005P identification.
Example: *IDN?
Contents: KORAD KD3005P V2.0 (Manufacturer, model name).
10. RCL<NR1>
Description: Recalls a panel setting.
NR1 (1-5): Memory number 1 to 5.
Example: RCL1 Recalls the panel setting stored in memory number 1.
11. SAV<NR1>
Description: Stores the panel setting.
NR1 (1-5): Memory number 1 to 5.
Example: SAV1 Stores the panel setting in memory number 1.
12. OCP<NR1>
Description: Over current setting.
Example: OCP1 OCP ON.

Manufacturer Information

SHENZHEN KORAD TECHNOLOGY CO. LTD.

Address: F3, Building A4, District B, Songbai Industrial Park, Guangming New District, Shenzhen, 518106, P.R. China.

Tel: 86-755-61535026

Fax: 86-755-61535025

E-mail: adam@koradtechnology.com

Website: www.koradtechnology.com

Website: www.korad.com.cn

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