High-power DC power supplyCurrently, mainly used for testing linear DC voltage regulators and high-frequency DC voltage regulators. Here's a rundown of several common phenomena encountered during the testing process: situations where there's voltage but no current, or vice versa. In such cases, you should check if the power supply load is properly connected, if the load is short-circuited or open-circuited, and if the load complies with specifications. When adjusting the voltage, if the no-load voltage cannot be increased, it's because the power supply still consumes a tiny amount of current even when unloaded. If you turn the "current adjustment" to zero, no small current is released, and thus the no-load voltage cannot be increased. Therefore, it's generally recommended to set the "current adjustment" to a little above zero to raise the no-load voltage. With a DC power supply, if there's voltage output, there will naturally be current output. However, if you can't adjust the voltage anymore, and a series of issues arise, these may be due to the operator's lack of understanding of the concepts of "constant voltage" and "constant current." Simply put, if the "constant current" light is on, it indicates that the power supply is operating in constant current mode, and the output voltage is not "adjusted" but determined by the load. To change the output current, you must adjust the "current adjustment" knob, and the output voltage will change accordingly, which is the correct approach.
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