Pure Sine Wave AC Power Source

1. Basic Understanding of Equipment

1.1 Key Technical Specifications

Specifications/Model Numbers	LSP-500VARC	LSP-500VARC-Pst	LSP-1KVARC	LSP-1KVARC-Pst
Output Voltage	Single-phase: 2 V–150 V / 2 V–300 V
Maximum Output Current	4.2A (2V–150V), 2.1A (2–300V)
Output Frequency	45.00–65.00 Hz
Total Harmonic Distortion	≤0.3% (no-load or at full resistive load)
Equivalent Internal Resistance	≤0.1 Ω (zero-resistance design)
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
Voltage Resolution	0.1 V
Current Resolution	0.001 A
Display Parameters	Voltage, Current, Power, Power Factor, Frequency
Input power supply	Single-phase AC 110 V/220 V, 50/60 Hz

1.2 Equipment Configuration Verification

1.2.1 Unpacking

When unpacking the device, handle it gently to avoid scratching the outer 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 Main Unit and Accessories

Number	Note
①	LSP Series Power Supplies
②	Power Cord
③	RS232/RS485 Communication Cables
④	Spare Fuses

1.2.3 Downloading Electronic Documents

Download links for the digital user manual, software, warranty card, and other materials have been sent via email. 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: Both LISUN spectroradiometer and goniophotomoeter software can control the LSP series power supplies; this manual covers only the operation of the power supply-specific software.

2. Safety Precautions

2.1 Electrical Safety Standards

Input power supply single-phase AC 110 V/220 V ±10 V, 50/60 Hz. It must comply with safety standards and be equipped with a proper protective grounding system, with a protective grounding resistance of ≤4 Ω, to prevent electric shock.

Note: The rear panel of the LSP series power supplies features an input voltage selector switch. See Section 3.2. Please take note!

2.2 Environmental Safety Standards

For indoor use only; avoid direct sunlight. Place on a sturdy, stable surface to prevent excessive vibration. Ensure the environment is free of dust, corrosive gases, and flammable or explosive materials. Keep away from strong magnetic and electric fields. Ensure adequate ventilation; leave at least 10 cm of clearance 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 equipment or plug in/unplug the power cord with wet hands; the output must be turned off before connecting or disconnecting wires; allow the unit to warm up for at least 10 minutes after powering on before enabling the output; Do not touch the output terminals, internal components, the load, or load wiring while the equipment is operating; allow at least 3 minutes between powering on and off to prevent damage from power surges; do not shut down the equipment directly while it is in output mode; first disconnect the output before shutting 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	The left half of the display is the display area, showing the following from top to bottom: voltage, current, power, and power factor.
③	The right half of the display is the settings area, which, from top to bottom, consists of: voltage, frequency, voltage range, starting phase, and baud rate.
④	The power output status is displayed in the lower-right corner of the screen; if a power alarm occurs, the alarm code is displayed.
⑤	The function buttons, from left to right, are: Settings, Voltage Setting, Frequency Setting, and Lock Screen.
⑥	Slider: Use it to adjust the number value; move it clockwise to increase and counterclockwise to decrease.
⑦	Use the left and right arrow keys to adjust the number’s value or the number of digits during setup.
⑧	Number keys: 0 through 9 and the decimal point
⑨	Clear button
⑩	Confirm button
⑪	Output Key
⑫	Output outlet—please connect your AC load

Note: The LSP-500VARC series consists of compact power supplies; the front panel appearance is shown in the figure above. The LSP-1KVARC series consists of large power supplies; the front panel appearance is shown in the figure below. The front panel controls for both series are identical.

3.2 Introduction to the Back Panel

Number	Note
①	Input voltage switching: The unit is set to 220V by default at the factory. Note: If the switch is set to 110V and the input is 220V, the power supply will burn out; if the switch is set to 220V and the input is 110V, the power supply will fail to start . Note: The LSP-500VARC has one switch on the back; the LSP-1KVARC has two switches on the back, which must be set to the same position simultaneously.
②	Power cord jack, for connecting the device to an appropriate power source
③	Protective grounding terminal: Internally short-circuited to the power cord’s grounding terminal. If the power cord already provides adequate protective grounding, this terminal does not need to be connected.
④	Fuse
⑤	Trigger signal interface; required when used with the LISUN LSRF-3 device
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 cable to connect it to the computer’s USB port.
⑦	Output jack—this functions the same as the front-panel output jack; simply connect to either one.

Note: The LSP-500VARC series consists of compact power supplies; the rear panel appearance is shown in the image above. The LSP-1KVARC series consists of large power supplies; the rear panel appearance is shown in the image below. The front-panel operation is identical for both series.

4. Equipment Operation

4.1 Preparations

Changing the Display Language: Press and hold the number keys 1, 5, and 9 simultaneously to switch the display language between Chinese and English.

4.2 Procedure

Instructions	Note
①	Press the “Set” button to first set the voltage range—150 V or 300 V. You can use the knob or the left and right buttons to adjust the setting. Once set, press the “Confirm” button.
②	The system automatically enters the initial phase setting, which defaults to 0°. If you have specific requirements, you can set the value between 0° and 359° using the left and right buttons and the rotary knob. Once you have made your selection, press the Confirm button.
③	The device automatically enters the baud rate settings menu. The factory default is 9600. When you need to control the device using software, set the baud rate to 9600. Use the left and right buttons and the knob to make the selection, then press the Confirm button.
④	Press the voltage setting button to set the output voltage. You can use the numeric keys to set the value directly. Once set, press the confirm button.
⑤	Press the frequency setting button to set the output frequency. You can use the number keys to set it directly. Once set, press the confirm button.
⑥	After verifying that the wiring and settings are correct, press the output button to start output. While in output mode, you can use the knob to fine-tune the output voltage; press the output button again to stop the output.

5. Software Operation

5.1 Preparations

5.1.1 Hardware Preparation

Refer to Section 4.2 to verify that the device’s baud rate is 9600.

5.1.2 Software Preparation

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

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	Select AC Power
④	To select the correct communication port, go to “Device Manager” on your computer to verify which communication port is being used.

5.2 Controlling AC Power Output Using Software

Number	Note
①	Set the voltage range
②	Set the Output Frequency and Voltage
③	Click to start output
④	Click to turn off the 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 terminal connections are secure and free of burn marks; 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	Input voltage selector switch malfunction, blown fuse	Check the input voltage selector switch; turn off the power, eliminate any output short circuits or overloads, replace the fuse with one of the same rating, and do not increase the current rating.
The fan isn’t spinning	Dust buildup, motor failure	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.
Error code 02 in the lower-right corner of the display	In the event of an output short circuit, current overload, or power overload, the power supply will automatically cut off the output to protect itself.	Please turn off the LSP power supply, check the wiring, and resolve any output short circuits before turning it back on; if the load current or power exceeds the power supply’s upper limit, you will need to purchase a larger AC power supply.
Error code 01 in the lower-right corner of the display	A fuse has blown	Please turn off the LSP power supply and unplug the power cord. Check all fuses on the rear panel of the power supply and replace them with fuses of the same rating. Do not use fuses with a higher current rating.

8. Packing List

No.	Name	Quantity
①	LSP Series Power Supply Units	1 unit
②	Power Cord	1 piece
③	RS232/RS485 Communication Cables
④	Spare Fuses	2