Kenwood PS 30 Power Supply Manual

The Kenwood PS 30 is a regulated DC power supply unit featuring variable voltage output, current limiting, and multiple output terminals. With specifications including 0-30V DC output, 0-2A current range, line regulation of 0.01% + 2mV, load regulation of 0.01% + 3mV, and ripple/noise below 1mV RMS, it provides stable power for electronic testing and development. Below are key sections for safety, features, installation, operation, and maintenance.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Operation Procedures 8. Safety Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Voltage and current adjustment knobs, output terminals, meter display, power switch, and overload protection.

Feature	Description
Voltage Control	Precision knob for 0-30V DC output adjustment
Current Control	Adjustable current limiting from 0-2A
Output Terminals	Binding posts for positive, negative, and ground connections
Meter Display	Analog meters showing voltage and current output
Overload Protection	Automatic current limiting and short-circuit protection
Power Switch	Main power on/off control
Line Regulation	0.01% + 2mV for stable output
Load Regulation	0.01% + 3mV under varying loads
Ripple & Noise	Less than 1mV RMS for clean DC output
Thermal Protection	Automatic shutdown in case of overheating

Installation

Unpack and inspect contents. Place on stable, well-ventilated surface.

Position unit: Ensure adequate ventilation space around all sides.
Connect to AC power: Use supplied power cord to appropriate outlet.
Ground connection: Connect ground terminal to proper earth ground.
Output connections: Use appropriate cables for device connections.

WARNING! Ensure proper grounding to prevent electric shock. Do not block ventilation openings.

First-Time Setup

Power on unit; verify proper operation.

Initial check: Set both voltage and current controls to minimum (fully counterclockwise).
Power on: Turn power switch to ON position.
Meter verification: Check that both voltage and current meters read zero.
Test output: Connect test load and verify voltage/current adjustment functionality.
Calibration: If necessary, perform calibration according to service manual.

CAUTION! Always start with minimum settings when connecting unknown loads.

Specifications

Output Voltage: 0-30V DC continuously adjustable
Output Current: 0-2A continuously adjustable
Line Regulation: 0.01% + 2mV
Load Regulation: 0.01% + 3mV
Ripple & Noise: Less than 1mV RMS
Meter Accuracy: ±3% of full scale
Operating Temperature: 0°C to 40°C
Power Requirements: 100-120V AC, 50/60Hz
Dimensions: Standard benchtop unit size
Weight: Approximately 4.5 kg

Controls and Settings

Front panel controls: Voltage control knob, Current control knob, Power switch, Output terminals.

Operation: Adjust voltage and current knobs for desired output. Monitor via analog meters.

Voltage Adjustment: Rotate voltage knob clockwise to increase output voltage. Current Limiting: Set current knob to desired maximum current limit. Meter Reading: Voltage meter shows output voltage; current meter shows load current. Overload Protection: Automatic current limiting activates when load exceeds set current.

Connecting Devices

Output terminals: Positive (red), Negative (black), Ground (green).

Turn off power supply before making connections.
Connect positive lead to device positive input.
Connect negative lead to device negative input.
Connect ground terminal for safety grounding.
Set voltage and current to minimum before powering on.

Tip: Use appropriate wire gauge for expected current load.

Operation Procedures

Standard operating sequence for safe and effective use.

Initial setup: Set both voltage and current controls to minimum.
Connect load: Ensure proper polarity and secure connections.
Power on: Turn power switch to ON position.
Adjust voltage: Slowly increase voltage to desired level.
Set current limit: Adjust current control for maximum safe current.
Monitor operation: Watch meters for stable readings.
Shutdown: Reduce voltage to minimum before turning off.
Disconnect: Remove load connections after power off.

WARNING! Never short-circuit outputs. Always use current limiting for protection.

Safety Features

Overload Protection: Automatic current limiting prevents damage. Short-Circuit Protection: Current limits to safe level during shorts. Thermal Protection: Automatic shutdown if internal temperature exceeds limits. Isolation: Output fully floating from ground for flexibility.

Care & Maintenance

Keep unit clean and dry. Periodically check calibration. Ensure ventilation openings remain unobstructed.

CAUTION! Disconnect from AC power before cleaning. Use only dry cloth for exterior cleaning.

Regulatory Information

Complies with relevant safety standards for laboratory equipment. Manufactured to meet industrial quality standards. For technical support or service, contact authorized Kenwood service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No output voltage	Power cord disconnected	Check AC power connection; verify power switch ON
Unstable output	Poor connections	Check all terminal connections; ensure secure contacts
Meter readings inaccurate	Calibration needed	Perform calibration procedure; check against known reference
Overload protection active	Excessive current draw	Reduce load; check for shorts; increase current limit setting
Unit overheats	Insufficient ventilation	Ensure adequate airflow; reduce ambient temperature

Service: Contact authorized Kenwood service center for internal repairs.