1. In cases where there is voltage but no current, or current but no voltage, it is necessary to check the power supply load contact for proper fit, whether the load is short-circuited or disconnected, and if the load meets the specifications; Aviation Power Supply
2. The reason why the unloaded voltage does not rise when adjusting the voltage is that even when unloaded, the power supply requires a small amount of current. However, by setting the "current adjustment" to zero, even a slight current will not extinguish, of course, the unloaded voltage will not rise either, thus the "current adjustment" is generally not set to zero.
3. The DC power supply has voltage and current outputs. When adjusting the voltage, it cannot be increased, which might be primarily due to the operator's lack of understanding of the "constant voltage" concept, caused by "constant current"; if the "constant current" light is on, the power supply is operating in a constant current state, and the output voltage is not adjusted but determined by the load. Only when the "current adjustment" knob is turned, will the output current change, and the output voltage will change accordingly as well. 400HZ power supply
