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This post was last edited by Hasty Passer on March 6, 2019, at 14:46. When using a regulated power supply, one must determine the required voltage first; then adjust the “coarse adjustment” knob, and subsequently make fine adjustments using the “fine adjustment” knob. Proper coordination between these two knobs is essential. During use, when maintenance is required due to load short circuits or overloads, the load should be disconnected first, followed by pressing the “Restore” button; alternatively, the power supply can be turned back on, and the voltage will return to normal operation. The load can then be connected again once the fault has been resolved. Sometimes, when we are in use, we find that the current cannot be increased. What causes this? The manufacturer’s technician explained the following to everyone. 1. The output has voltage but no current, or it has current but no voltage. It is necessary to check whether the load is in good contact, whether it is short-circuited or open-circuited, and whether it meets the specifications. 2. When adjusting the voltage, it was found that the no-load voltage could not be increased. To stabilize the output voltage of the power supply, turn the current adjustment knob clockwise to the end and hold it there. 3. The power supply provides both voltage and current output, but when trying to adjust the voltage, it’s no longer possible to increase it; similarly, even though the power supply offers both voltage and current output, it’s not possible to increase the current level further. If the \"constant current\" light is on, it indicates that the power supply is operating in constant current mode. In this case, the output voltage is not adjusted; rather, it is determined by the load. Only by adjusting the \"current control\" knob can the output current be changed, and consequently the output voltage will also change.