High-power DC power supplyCurrently used primarily for testing linear DC voltage regulators and high-frequency DC voltage regulators, we have compiled several common phenomena encountered during the testing process for you. These include scenarios where there is voltage but no current, or vice versa. In such cases, one should check if the power supply load is properly connected, whether the load is short-circuited or open-circuited, and whether the load complies with specifications. When adjusting the voltage, if the unloaded voltage cannot be increased, it is because the power supply still consumes a tiny amount of current even when unloaded. By turning the "current adjustment" to zero, no small current is released, and thus the unloaded voltage cannot be increased. Therefore, the "current adjustment" is usually set to a little above zero to allow the unloaded voltage to be adjusted. With a DC power supply, voltage output naturally leads to current output. However, if the voltage cannot be adjusted again and other 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. Only by adjusting the "current adjustment" knob will the output current change, and the output voltage will also change accordingly, which is the correct method.
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