dc power supply, dr.meter 30v 5a adjustable switching regulated dc bench linear power supply with alligator leads and 3 led digital display, 110v/220v variable power supply with us 3-prong cable dr.meter <br><b>dr.meter ps-305dm </b><br>power supply is a kind of continuously adjustable linear dc voltage regulator power supply with high stability, high reliability and low noise. its output voltage and current can be continuously adjusted. also it can be both as constant voltage and constant current dc power supply. its constant voltage and current can be auto-conversion. this low cost and universal power supply can be used in many different areas, from production lines to school use.<br> <br><b>feature:</b><br> 1. single output, single phase<br> 2.110v/220 ±10% input voltage, dual-input voltage.<br> 3. output constant current adjustable <br> 4. output constant voltage adjustable<br> 5. 3led voltage and current display<br> 6. ma and a converted display which controlled by a button. <br> 7. constant voltage and current operation model. c.v and c.c convert automatically <br> 8. current limitation protection<br> 9. good quality, cost-effective<br> <br><b>application:</b><br> suitable for the laboratory, electronic, communication equipments maintenance, products line, scientific research and teaching units<br> <br><b>specifications:</b><br> <br><b>specifications:</b><br> model: ps-305dm<br> input voltage: 220 v/110v±10% 50/60hz (setting switch at the back)<br> output voltage: 0-30v <br> output current: 0-5a <br> ma: 0-990ma <br> operating temperature: 00c to 400c <br> relative humidity: <80%<br> storage temperature:-100c to 700c <br> relative humidity: <70%<br> <br><b>constant voltage state:</b><br> voltage stability: <0.01%+3mv<br> load stability :< 0.01%+5mv <br> recovery time :< 100μs<br> ripple & noise : <1.0mvrms<br> temperature coefficient: < 300ppm/0c<br> <br><b>constant current state:</b><br> current stability: < 0.2%+3ma <br> load stability :< 0.2%+3ma<br> ripple & noise :< 3marms<br>