User Manual DC POWER SUPPLY NPS3010W

Introduction

The series of switching power supplies for measuring instrument have ruled out the inconvenience of big volume and heavyweight of a traditional power supply possess. The output voltage and current is controlled by two variable resistors regulation for more handy and precise adjustment.

Features

• With more extensive range of input voltage at 230V 10% 50Hz/60Hz.
• With high frequency operation can reduce the size of power transformer.
• With small size, light weight and high density power.
• Entire efficiency rate higher up to 70%.
• Zero adjustment for the output of voltage and current.

Parameter Specification

• Operation Environment: Indoor use
• Input Voltage: 230V 10%  52hz/60Hz
• Output Voltage: 0-30V
• Output Current: 0-10A
• Operation Temperature & Humidity: 0c to 40c

Constant Voltage Operation

• Output Voltage ranges from 0 to rating voltage with continuous adjustment.
• Voltage regulation
  Line Regulation<= 5mV
  Load Regulation<= 5mV
• Recovery time<= 500 us (50% load change, minimum load 5.0A)
• Ripple $ Noise <=5mVrms, 100mVp-p
• Temperature coefficient<=100ppm/C

Operation Mode: Voltage Operation Mode

1. Set Power Switch to “OFF” position.
2. Make sure that line voltage is correct for the input power voltage.
3. Plug power cord into the power outlet.
4. Set power switch to “ON” position.
5. Adjust “Voltage” and “Current” control to the desired output voltage and current.
6. Connect the external load to the output binding posts. Make sure both “+” and “-” terminals are connected correctly.

Setting Current Limit

1. Determine the maximum safe current for the device to be powered.
2. Temporarily short the (+) and (-) terminals of the power supply together with a test lead.
3. Rotate the COARSE VOLTAGE control away from zero sufficiently to have the CC indicator lightened.
4. Adjust the current control for the desired current limit.
5. The current limit has now been preset.
6. Remove the short between + and – terminals and hook up for constant voltage operation.

Terminal

Constant Voltage/ Constant Current Crossover Characteristic

The working characteristic of the series is called a constant voltage/current automatic crossover type. This permits continuous transition from constant current to contant voltage modes in response to the load change. the intersection of constant voltage and constant current mode is called crossover point. the crossover point is reached when the CV indicator goes out and the CC indicator is on.