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Preset DC Power Supply


Model PPS-4A preset regulated DC power supply has a unique feature to preset the voltage and current with- out actually loading the unit. The 16V output power supply is completely solid state and suitable for bench operation or 19" rack operation. It is a well regulated constant voltage/constant current supply which delivers 0.16V at 0-4 amps and can be adjusted continuously throughout the output range. The front panel current control can be used to establish the output current limit (overload or short circuit). When the supply is used as a constant voltage source the voltage controls can be used to limit the output voltage. When the unit is used as a constant current source, current controls can be used to limit the output current. The unit will automatically cross over from constant voltage to current mode and vice-versa if the output current or voltage exceeds these preset limits.

Output Voltage:

0-16V DC continuously variable the coarse and fine       controls.

Load Current:

0-4 Amp max., continuously variable with coarse and     fine controls.

Constant Volt.Mode Regulation:

Less than +/-0.02% +2mV for +/-10% change in line     voltage.


Less than +/-0.02% +2mV for load change from zero    to full load.

Ripple & Noise:

Less than 1mV rms max (20Hz - 20MHz)

Constant Current Reg. Line:

Less than +/-0.5% +250uA for +/-10% change in line    voltage.


Less than +/-0.5% +250uA for change in output   voltage from O volts to maximum output voltage.

Ripple & Noise:

Less than 4mA rms.

Output Polarity:

Floating w.r.t. ground.

Overload Protection:

Automatic overload and short circuit protection.

Transient Response:

100usecs to within 10mV of set output volt.for load    change from 10% to 90%

Stability - Total drift within 8 hours,
line after warm up under constant load & temp.

+/-0.1% +2mV in constant voltage mode.

+/-0.5% +2mV in constant current mode with constant    line, load and ambient temperature conditions.

Panel Meters:

Digital panel meter provided with an accuracy of +/-3   counts.

Mode Indication:

Respective LED lights up when the unit is working in   CV or CC mode.

Output Controls:

Single turn coarse & fine controls & current controls   provided on front panel.

Operating Temperatures:

0-50 degrees C

Input Voltage:

115V AC, +/-10% 46-63 single phase.

WISCO International, Inc. - MIAMI, FL U.S.A.
Fax: (954) 370-3997 | E-mail: wiscointl@wiscointl.com

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