How to Use a
Variable Power Supply
A professional guide to safe operation, CV/CC mode management, and advanced connection techniques for industrial and laboratory environments.
Safety Precautions
- 鈥?Grounding: Always ensure the power supply is connected to a properly grounded AC outlet.
- 鈥?Polarity: Double-check positive (+) and negative (-) connections before powering on.
- 鈥?Ventilation: Keep at least 10cm of clearance around the cooling fans to prevent overheating.
Understanding CV and CC Modes
Most variable DC power supplies operate in two modes: Constant Voltage (CV) and Constant Current (CC). The unit switches between these modes automatically based on your load resistance and the limits you set.
Constant Voltage (CV)
The supply maintains your set voltage while the current varies according to the load. This is the standard mode for most electronics.
Constant Current (CC)
The supply limits the current to your set value by varying the voltage. Essential for battery charging and LED testing.
Standard Operating Procedure
Set Voltage Limit
With the output OFF, adjust the voltage knob to your required level.
Set Current Limit
Short the output terminals (or use the 'Limit' button) and adjust the current knob to set a safety ceiling.
Connect Load
Connect your device under test, ensuring secure and clean contact points.
Power On
Enable the output and monitor the display for any unexpected current draw.
Pro Tip
Use Remote Sensing (if available) for high-current applications. This compensates for voltage drops in your lead wires, ensuring the exact voltage reaches your load.