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Introdutions:The YIHUA-1501S variable DC power supplies are very stable,regulated DC power supplies allowing continuous adjustment of both the output voltage and output current levels. Models:Technical Parameters:Input voltage:230V/115V AC+/-10% 50HZ/60Hz+/-2HzLine Regulation:CV≤0.01+2mVRipple And Noise:CV≤1mVr.m.sProtection Constant:Current And Short-cirruit protectionEnviroment:-10C-40CRelative Humidity:less than 90%.Attentions:In the event of a short circuit at the output the current will limit at the value set by the current controls,however the unit should be turned off and the short circuit removed before continuing use.The mains power must be switched off before servicing and servicing should be referred to a qualified person.The unit should be stored in a dry and well ventilated place and the power cord removed if storing for long periods.