I recently bought a DC power supply online to perform experiments that require electricity. I am not an expert with electricity so I have a few questions about it. It has a maximum of 10 amps and 30 volts, and both values are variable, however it does not show me the value of the current unless the electricity is flowing. It also won't allow any voltage to pass through unless the current passes a certain value. Can somebody please explain this to me and also give some tips of how to safely and efficiently use it? I am currently trying to use it to build an electrolysis generator to use the gas for experiments including heavy water purification and another project in which I hope to build a hydrogen torch. I included this information to help you make better tips if you need it. Thanks!