Digital CC and CV DC Power Supply

1. Basic Understanding of Equipment

1.1 Key Technical Specifications

Specifications/Model Numbers	DC3005	DC3010	DC6005	DC6010
Maximum Output Voltage/Current	30 V/5 A	30 V/10 A	60 V/5 A	60 V/10 A
Voltage Resolution	0.0001 V (0 V–10 V); 0.001 V (10 V–60 V)
Voltage Accuracy	±(0.02% of reading + 0.01% of range + 1 digit)
Current Resolution	0.0001 A
Current Accuracy	±(0.02% of reading + 0.01% of range + 1 digit) < 5 A; ±(0.03% of reading + 0.02% of range + 1 digit) ≥ 5 A

1.2 Equipment Configuration Verification

1.2.1 Unpacking

When unpacking the device, handle it gently to avoid scratching the casing with sharp tools. After unpacking, first inspect the exterior of the device to ensure there is no visible deformation or dents, and that the buttons are not damaged or loose. If you notice any abnormalities with the device or its accessories, do not turn it on. Please contact us immediately.

1.2.2 Host and Accessories

Number	Note
①	DC Series Power Supplies
②	Power Cord
③	RS-232 or RS-485 communication cable
④	Spare Fuses

1.2.3 Downloading Electronic Documents

We have already sent download links for the digital user manual, software, warranty card, and other materials via email at the time of shipment. Please download them as soon as possible. If you missed the email, please feel free to contact us to request the download links again.

Note 1: Both the LISUN Spectroradiometer and Goniophotomoeter software can control the DC series power supplies; this manual only covers the operation of the dedicated power supply software.

Note 2: Unlike the DC-S and DC-B series of switching power supplies, the high-precision linear DC series power supplies do not allow for the direct setting of output voltage and current values. When operating these units, we recommend referring to Chapter 4 for instructions on using the software; when operating them via the front panel as described in Chapter 5, please be patient during the debugging process.

2. Safety Precautions

2.1 Electrical Safety Standards

The equipment’s Input power supply single-phase AC 220 V ±10%, 50/60 Hz. It must comply with safety standards and have a properly functioning protective grounding system, with a protective grounding resistance of ≤4 Ω, to prevent electric shock.

2.2 Environmental Safety Standards

For indoor use only; avoid direct sunlight. Place on a sturdy, stable surface to prevent severe vibrations. Ensure the environment is free of dust, corrosive gases, and flammable or explosive materials. Keep away from strong magnetic and electric fields. Ensure good ventilation; leave at least 10 cm of space around the device for heat dissipation, and do not block the cooling fan vents. Operating Environment: Temperature 5°C to 35°C, relative humidity ≤65% RH.

2.3 Operational Safety Guidelines

Do not operate the device or plug in/unplug the power cord with wet hands; stop the output before connecting or disconnecting wires; allow the device to warm up for at least 10 minutes after powering on before resuming output; do not touch the output terminals, internal components, the load, or load wiring while the device is in operation; Allow at least 3 minutes between powering on and off to prevent damage from power surges; do not shut down the device directly while it is in output mode; first shut off the output and wait until the voltage and current readings return to 0 before powering down; if you notice an unusual odor, smoke, abnormal noise, or overheating, immediately disconnect the power and do not continue operation.

3. Equipment Overview and Wiring

3.1 Introduction to the Front Panel

Number	Note
①	Power Switch
②	Current display window A; displays “—–” when the limit is exceeded.
③	Constant Current (CC) Output Indicator Light
④	Voltage display window V; “—–” appears when the voltage exceeds the limit.
⑤	Constant Voltage (CV) Output Indicator Light
⑥	Flow control knob: Turn clockwise to increase flow, counterclockwise to decrease flow
⑦	Volume control knob: Turn clockwise to increase, counterclockwise to decrease
⑧	Adjust the fineness selector switch: COARSE (coarse adjustment), MIDDLE (medium adjustment), FINE (fine adjustment)
⑨	Remote/Local Switch Button: When the indicator light is on, the device is under software-based remote control (front-panel controls are disabled). Press the button once to turn off the indicator light, after which you can use the front panel controls.
⑩	Lock/Unlock Screen
⑪	Alarm Mute + Output Return-to-Zero Reset
⑫	Output terminals: Connect to your DC load. Note: Be sure to observe the correct polarity when wiring.
⑬	The external sampling terminal, which is also connected to your DC load, allows you to obtain a more accurate load-side voltage. If you require high voltage sampling accuracy, please connect it; leaving it unconnected does not affect the DC power supply’s output functionality. Note: Pay attention to polarity when wiring.
⑭	Internal Sampling/External Sampling. Note: If the external sampling terminal is not wired, the sampling mode switch will not function, and the device will only perform internal sampling.

Note: External sampling uses a 4-wire measurement method, which accounts for cable voltage drop; internal sampling includes cable voltage drop.

3.2 Introduction to the Back Panel

Number	Note
①	Power cord jack, for connecting the device to a suitable power source
②	Fuse
③	Protective grounding terminal: Internally short-circuited to the grounding terminal of the power cord. If the power cord already provides adequate protective grounding, this terminal does not need to be connected.
④	Output terminals; these have the same function as the output terminals on the device’s front panel
⑤	External sampling terminal; functions identically to the external sampling terminal on the device’s front panel
⑥	RS232/RS485 communication port: If you need to use computer software to configure and control the power output, connect it to the computer’s communication port, or use a USB adapter cable to connect it to the computer’s USB port.

Note: For the output terminals, connect to either the front panel or the rear panel; for the external sampling terminals, connect to either the front panel or the rear panel.

4. Software Operation

4.1 Preparations

Copy the software folder to your computer. No installation is required; simply double-click the following file to open the software interface.

Note:

Number	Note
①	Click the red LISUN logo in the upper-left corner of the software interface
②	Select the display language for the software interface: Chinese or English
③	Selecting a DC Series Power Supply
④	To select the correct communication port, check the “Device Manager” on your computer to confirm which port is being used.

4.2 Controlling the DC Power Supply Output Using Software

Number	Note
①	Select the output mode: CC (constant current output) or CV (constant voltage output)
②	Enter the appropriate current and voltage values
③	Click “Output” to export.
④	Click “Stop Output” to stop the output.

Note: If a constant-voltage output is required, the current serves as a current-limiting reference value. You can set it directly to the maximum value, or at least to a value that meets the set constant-voltage value. If the current is set too low, it will trigger the current limit, resulting in a failed output.

If a constant current output is required, the voltage serves as the overvoltage limit reference. You can set it directly to the maximum value, or at least to a value that meets the set constant current requirement. If the voltage is set too low, it will trigger the overvoltage limit, causing the output to fail.

5. Equipment Operation

5.1 Constant-Voltage Output

Make sure the Remote/Local switch indicator light is off. If it is on, press the button to turn it off and switch to local operation mode.

Instructions	Note
①	Verify that the adjustment mode is set to “Coarse”; otherwise, press the adjustment mode switch button to switch to “Coarse.”
②	Turn the current adjustment knob clockwise and continue turning until the alarm is triggered (reaching the device’s maximum current output) or until the current reaches a value sufficient to maintain constant-voltage output. Note : There is no output and no digital display before adjusting the voltage.
③	Slowly turn the voltage adjustment knob clockwise; the output voltage and current values will begin to display and gradually increase, and the CV indicator light will turn on, indicating that the unit is in constant-voltage output mode.
④	After roughly adjusting the output voltage to a value close to the rated voltage, switch to intermediate or fine adjustment to set the voltage to the rated voltage of the DC load.
⑤	Press the “Return to Zero” reset button to stop the output.

Note: If, during debugging, the CV indicator turns off and the CC indicator turns on, this indicates that the set current value is too low and the power supply has switched to constant-current mode. Simply turn the knob clockwise to increase the current and restore constant-voltage output.

5.2 Constant-Current Output

Make sure the Remote/Local switch indicator light is off. If it is on, press the button to turn it off and switch to local operation mode.

Instructions	Note
①	Verify that the adjustment mode is set to “Coarse”; otherwise, press the adjustment mode switch button to switch to “Coarse.”
②	Turn the voltage adjustment knob clockwise and continue turning until the alarm is triggered (reaching the device’s maximum voltage output) or until the voltage is set to a value that can at least support constant-current output. Note : There is no output and no digital display before adjusting the current.
③	Slowly turn the current adjustment knob clockwise; the output voltage and current values will begin to display and gradually increase, and the CC indicator will light up, indicating that the unit is in constant-current output mode.
④	After roughly adjusting the output current to a value close to the rated current, switch to medium or fine adjustment to set the current to the rated current of the DC load.
⑤	Press the “Return to Zero” reset button to stop the output.

Note: If, during debugging, the CC indicator turns off and the CV indicator turns on, it means the set voltage is too low, and the power supply has switched to constant-voltage mode. Turn the voltage up clockwise to restore constant-current output.

6. Daily Maintenance and Care of Equipment

6.1 Routine Maintenance

6.1.1 Daily Cleaning

Be sure to turn off the power and unplug the power cord before cleaning. We recommend wiping the device with a soft, anti-static cotton cloth and a mild detergent; do not spray liquids directly onto the device. Do not use chemical solvents such as benzene, toluene, or acetone.

6.1.2 Routine Inspections

Before each use, check that the power cord and terminals are not loose or burnt; ensure that the fan vents are not blocked; and after turning on the unit, verify that the indicator lights and display are functioning properly.

6.2 Storage Specifications

6.2.1 Storage Environment Requirements

Temperature: 5°C to 35°C; relative humidity: ≤65% RH; dry, dust-free environment free of corrosive gases.

6.2.2 Long-Term Storage Operations

Turn off the power and unplug all cables; clean the equipment and wrap it in dust-proof film; turn on the power for 10 minutes each month to prevent moisture damage to the components.

7. Troubleshooting and Resolving Common Problems

Fault Symptoms	Possible Causes	Procedure
Unable to Power On	Loose Input power supply cord, blown fuse	Turn off the power and check the connection Input power supply; turn off the power, troubleshoot for short circuits or overloads, replace the fuse with one of the same rating, and do not increase the current rating.
The alarm indicator light is on	Output Short Circuit, Output Out-of-Limits, and Device Overheat Protection	Stop output, check the output wiring, and retry after resolving any short circuits; verify that the load’s rated voltage and current are within limits—for example, the DC3005 model has a maximum output of 30 V and 5 A; shut down the unit, allow it to ventilate, clean the ventilation openings, and restart after it has cooled down.
The fan isn’t spinning	Dust buildup, motor malfunction	Turn off the power and clean the dust from the fan; if the problem persists, please contact us for repair or to have the fan replaced.

8. Packing List

No.	Name	Quantity
①	DC Series Power Supply Units	1 unit
②	Power Cord	1 piece
③	RS-232 or RS-485 communication cable
④	Spare Fuses	2