Use and Care Manual

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User Manual

PS303 and PS305

Regulated DC Power Supplies

Introduction

Congratulations on your purchase of the Triplett PS303/PS305 Regulated DC

Power Supply. These DC power supplies are high-quality and stable devices

that output pure and reliable signals. Other features include 4-digit voltage

and current LED display, short-circuit protection, overload protection, and

reverse polarity protection and more. These power supplies are ideal tools for

university and technical trade schools, electronics production lines, household

appliance repair companies, etc.

Summary of content (8 pages)

PAGE 1
User Manual PS303 and PS305 Regulated DC Power Supplies Introduction Congratulations on your purchase of the Triplett PS303/PS305 Regulated DC Power Supply. These DC power supplies are high-quality and stable devices that output pure and reliable signals. Other features include 4-digit voltage and current LED display, short-circuit protection, overload protection, and reverse polarity protection and more.
PAGE 2
Specifications Model PS303 PS505 Voltage output range 0-30V   Current output range 0-3A 0-5A   LED display digits 4 digits   Technical Parameters Operating Conditions Operating voltage: AC 110V/220V ± 5% 50Hz/60Hz Operating conditions: Temperature 0°C~40°C, relative humidity ≤85% Storage conditions: Temperature -10°C~80°C, relative humidity ≤80% Technical specifications Basic Function Technical specifications Model PS303 PS305 Rated output voltage 0~30V 0~30V Rated output current 0~3A 0~5A Output
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Setting accuracy (20Hz~20MHz) Ripple and noise Recall resolution Voltage: <0.5% + 20mV Voltage: <0.5% + 20mV Current: <0.5% + 5mA Current: <0.5% + 10mA Voltage: ≤1mVrms Voltage: ≤2mVrms Current: ≤3mArms Current: ≤3mArms Voltage: 10mV Voltage: 10mV Current: 1mA Current: 1mA Voltage: ≤300ppm/ °C Current: ≤300ppm/ °C Temperature coefficient Instantaneous <100uS (50% load change, minimum load 0.
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Front Panel 1) Power button 2) CC (constant current) indicator: This indicator is on during constant current operation. 3) CV (constant voltage) indicator: This indicator is on during constant voltage operation. 4) Voltage display 5) Current display 6) Voltage coarse adjustment knob: Turn it clockwise to increase the output voltage and turn it counterclockwise to decrease the output voltage.
PAGE 5
Rear Panel AC selector Power supply input socket Fuse holder
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Operation and Protective Measures 1) Switch the POWER to the off state and connect the power cord attached to the power supply. Connect the L terminal of the power cord plug to the live wire of the power socket. The ground wire of the power cord should be ensured a good connection to the ground. 2) The PS303/PS305 is a floating type power supply. If grounding is required in use, connect the 0~30V output terminals “+”pole or “−”pole on the front panel to the GND with a wire.
PAGE 7
Check before Booting AC input power and AC selector settings Model PS303 PS305 AC input power 110Vac ±5% 220Vac ±5% 110Vac ±5% 220Vac ±5% AC selector 110Vac Fuse specifications F2.5AL250V 220Vac F2AL250V 110Vac F3.15AL250V 220Vac F2.5AL250V Please follow the steps below before booting. 1. Check the input power Make sure that the AC power cord meets the requirements in the AC input power column above (NOTE: Maximum input voltage ≤ 250V). 2.
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Maintenance 1) If the supply voltage is normal and the CC and CV indicators are not on or the digits are not displayed after starting up, the fuse may be blown or there may be other malfunctions. Turn off the power switch and unplug the power cord, then replace the fuse or seek professional advice. 2) At constant voltage state, if the output voltage is less than the preset value and the CC indicator is on (current protection), the device will automatically switch to the constant current working state.