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Table of Contents
Related Manuals for Longwei Electric LW C Series
Summary of Contents for Longwei Electric LW C Series
- Page 1 LW-C Series Switch-Mode DC Regulated Power Supply User Manual...
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Page 2: Table Of Contents
Table of Contents General Safety Overview ……………………………………………………………………… 1 1. Product Description ………………………………………………………………………… 2 1.1 Introduction …………………………………………………………………………… 2 1.2 Features ………………………………………………………………………………… 3 1.3 Standard Accessories …………………………………………………………………… 3 1.4 Product Specifications ………………………………………………………………… 4 1.5 Panel Description ……………………………………………………………………… 5 1.6 Keypad Description …………………………………………………………………… 7 2 Operating Instructions …………………………………………………………………………... - Page 3 2.6-3 Constant Voltage/Constant Current State Switching …………………………… 16 2.7 Remote Compensation Function Usage ………………………………………………… 17 3 Remote Control ……………………………………………………………………………… 18 3.1 Interface ………………………………………………………………………………… 18 3.2 Communication Settings ………………………………………………………………… 19 3.3 Host Computer Control Interface ………………………………………………………… 20 3.4 Communication Format ………………………………………………………………… 20 4 Common Fault Handling and Maintenance …………………………………………………...
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Page 4: General Safety Overview
General Safety Overview Carefully read the following safety precautions to avoid personal injury and prevent damage to this product or any products connected to it. To avoid potential hazards, be sure to use this product as specified. Only qualified personnel should perform maintenance procedures. Use the appropriate power cord. -
Page 5: Product Description
A 'Danger' indicates an injury that will occur immediately upon reading this label. B 'Warning' indicates an injury that will not occur immediately upon reading this label. C 'Caution' indicates a potential hazard to this product or other property. The following symbols may appear on the product Caution Warning High Voltage Protective Ground Terminal... -
Page 6: Features
regulation. It can be widely used in electronic product development, device testing, product aging, the communications industry, laboratories, and research institutions. 1.2 Features 01 High precision and high resolution 10mV/10mA 02 High brightness LCD display 03 Convenient and fast operation and settings, digital key input and analog adjustment knob input Overload, overvoltage protection, overcurrent protection, overtemperature protection One-key lock function, effectively preventing misoperation Built-in buzzer for prompts or warnings... -
Page 7: Product Specifications
1.4 Product specifications... -
Page 8: Panel Description
1.5 Panel description Front panel diagram 1. Display screen for setting operations, showing the operation process and instructions; during operation, displays the power status and various values 2. Buzzer, sounds an alarm when the set working time is completed 3. Indicator function keys (4), pointing to the four operation instructions at the bottom of the LCD screen, executing corresponding operations 4. -
Page 9: Rear Panel Diagram
7. Function keys, detailed power parameters and status display, working time settings, locking and over-voltage cancellation functions 8. Output terminals, power output current 9. Indicator lights, indicating the power status, Constant Voltage (C.V), Constant Current (C.C), Over Voltage (O.V), and output status (Out) 10. -
Page 10: Keyboard Description
2. Temperature-controlled fan, the fan starts rotating when the temperature reaches the starting temperature 3.110V/220V switch, default is none, optional available 4. Power socket (including fuse holder) 5. RS485 interface, A and B terminals are for 485 communication A and B 6. -
Page 11: Operating Instructions
Input number 7 Input number 8 Input number 9 Input decimal point Reset Reset value Display Power status, output value display Timer Working duration setting Lock Lock keyboard Cancel O.V Cancel overvoltage Spare key, default no function 2. Operating instructions 2.1 Front panel operating instructions （1）The units of voltage and current mentioned in this instrument and user manual are in volts V and amperes A;... -
Page 12: Input Method
OFF: Power output status, with ON working and OFF shutting down. ① CV: The power supply operating status includes CV constant voltage, CC constant current, ② overvoltage OV, and overcurrent OCP. I=00.00 / 20.00 A: Displays the actual output current and set current value of the power ③... - Page 13 * At this time, the display screen shows the last working shutdown settings of voltage 24.00V and current value 20.00A. If no changes are needed, you can directly press key, corresponding to the display screen ENTR, and the power supply 【...
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Page 14: Knob Input Method
value in the numeric keypad area. If you want to clear and reset, you can press the【Reset】key and re-enter. At this point, pressing 【F3】 will switch back to the interface for setting output current and voltage. After completing the settings, press【F4】to confirm the output and start working. Example: Set output voltage to 28.5V, output current to 10.5A, overvoltage protection to 29V, and overcurrent protection to 15A (values entered using the keypad). -
Page 15: Storage/Retrieval Operations
2.3 Storage/retrieval operation 2.3-1 Storage operation Users can save some commonly used parameters in 6 groups of memory for quick retrieval. The stored content includes output voltage, output current value, and overvoltage and overcurrent values. Before storing, you must first set the required voltage, current, overvoltage, and overcurrent values (refer to section 2.2-1 for details). -
Page 16: Function Settings
#0# indicates group 0 The LCD screen displays the output current value Iset, output voltage value Vset, overvoltage protection value OVP, and overcurrent protection value OCP. By pressing (NEXT forward) or (PREV backward), you can enter different storage 【 】 【... -
Page 17: Continuous Time Setting
CV power supply constant voltage; CC power supply constant current; OV power supply overvoltage To exit, press (BACK) key to return to the main interface. 【 】 2.4-2 Continuous time setting The power supply provides power to the load, and the duration can be set. When the required output time is reached, it will automatically stop output and emit a buzzer sound as a reminder. -
Page 18: Lock Function
2.4-3 Locking function The locking function can prevent the power supply from being accidentally triggered during operation. When the power supply is operating on the main interface, press the function key 【 Lock 】, the locking indicator will light up. At this time, only the Lock key can be pressed; any other key will be ineffective. -
Page 19: Constant Current Operation Mode
output is turned off. to enter the parameter settings interface. In this mode, you can use the （2）Press 【 】 numeric keypad to input the desired output voltage value, output current value, overvoltage protection, and overcurrent protection value. （3）After setting is complete, press to turn on the output. -
Page 20: Remote Compensation Function Usage
2.7 Usage of Remote Compensation Function When the power supply outputs current to the load, if the output current experiences excessive voltage drop along the output wire, for example, if the output is set to 24V, the voltage across the load may be 21V, resulting in a loss of 3V along the output wire. At this point, this function can be used to ensure that the voltage across the load remains at the set voltage, preventing variations due to reasons such as long wire lengths. -
Page 21: Remote Control
Note: When using the remote compensation function, the load and output positive and negative terminals must be properly connected, and the rear panel compensation terminal must be connected to both ends of the load. The rear panel compensation terminal must not be left unconnected; otherwise, the voltage may continuously rise. The voltage across the load and the voltage drop across the output wires, the sum of these two is the voltage at the output terminal. -
Page 22: Communication Settings
3.2 Communication Settings Set the COM port in the PC according to the following settings: (1) Baud rate: 9600 (2) Parity: None (3) Data bits: 8 (4) Stop bits: 1 Note: If the power supply does not respond during remote control, please check: 1）Whether the interface cable is disconnected;... -
Page 23: Host Computer Control Interface
3.3 Host Control Interface Through the host control software, you can control the output voltage and current of the power supply on the computer interface, start and stop the power supply output, and monitor the output voltage and current values of the power supply in real-time, as well as the status of the power supply: constant voltage or constant current overvoltage, and whether it is outputting. -
Page 24: Common Fault Handling And Maintenance
P00: Overvoltage OV status, output disabled P10: Constant voltage CV status, output disabled P20: Constant current CC status, output disabled Complete format example: V24.00A12.55P11, meaning the power supply is currently outputting a voltage of 24.00V, an output current of 12.55A, in constant voltage mode, and the output is enabled Send: The host can send function codes to the power supply, which will respond upon receipt. - Page 25 1. Check if the maximum output power meets the load requirements. 2. If satisfied, check whether the voltage setting value is appropriate; if too low, you can appropriately increase the voltage setting value. Check whether the cables connecting the load and the power supply have short circuits or disconnections, and whether the connections are good.
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Page 26: Monitoring Assistant Software User Instructions
5 Monitoring Assistant Software User Instructions 1. Interface introduction 1. The actual output voltage value of the programmable power supply. 2. The set voltage value of the programmable power supply. 3. The actual output current value of the programmable power supply. 4. - Page 27 7. Output monitoring start button; clicking it once changes it to 'Output monitoring stop', at which point windows 1, 3, 5, and 6 will display information. Pressing it again will stop the monitoring, and the button will display 'Output monitoring start'; windows 5 and 6 will not show any information, and windows 1 and 3 will reset to zero.
- Page 28 start and stop, and monitor the output changes of the power supply in real-time. IV. Compatibility The software can run on Windows XP and Windows 7 systems, but is not compatible with Windows 10 and other non-Windows systems. V. Operating Instructions 1.
- Page 29 After making the changes, click 'Find Serial Port' in the software again, and finally click 'Open Serial Port'. Once successfully opened, it will display 'Port COMA has been opened' in the lower left corner. 3. Output start and stop Once the serial port is opened, the computer establishes serial communication with the programmable power supply, and the software begins monitoring.
- Page 30 2. If a bug occurs, please close the software and restart it. 3. After opening the software, please first open the serial port before performing other operations. The 'Output start' will change to 'Output stop', allowing you to set the voltage and current. 4.
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