Power Design TW347

The Power Design TW347D is a dual linear-mode DC power supply engineered for laboratory and industrial bench applications. Each of two independently controllable sources operates in constant voltage or constant current mode with automatic crossover, delivering high-resolution control via ten-turn potentiometers and switch-selectable metering for voltage or current monitoring. The unit incorporates a front-panel adjustable crowbar for overvoltage protection and a tracking mode where source B automatically follows source A to within 10 millivolts.

– Technical Specifications

Output Ratings (per source)
• Voltage: 0–18 V or 0–16 V
• Current: 0–3 A or 0–5 A
• Voltage regulation: 0.01% (18V/3A), 0.02% (16V/5A)
• Current regulation: 0.02% (18V/3A), 3% (16V/5A)
• Ripple and noise: 2 mV peak-to-peak (voltage), 10 mA peak-to-peak (current)
• Source impedance: >100,000 Ω DC
• Operating temperature: 0–50 °C with no derating
• Temperature coefficient: <0.03% + 300 µA/°C
• Stability (24 hours): <0.05% + 500 µA (line/load/ambient constant); <0.01% + 5 mV (post warm-up)

Output Configuration
• Either output terminal may be grounded or the supply floated up to 200 V from chassis
• Remote current programming via external resistor

– Key Features

• Dual independent sources in single 8.38" H × 7.75" W × 13.5" D chassis (24 lbs)
• Switch-selectable tracking mode: source B follows source A within 10 mV
• Two separate digital panel meters with source-specific voltage/current selection
• Constant current mode indicator lamp
• Front-panel adjustable crowbar protection
• Brushed anodized aluminum front panel with carrying handle

– Typical Applications

Power supply for circuit development, component characterization, and equipment testing where dual independent or tracked outputs are required with precise voltage and current control.

– Compatibility & Integration

Both output terminals support floating or grounded configurations up to 200 V from chassis, enabling flexible integration into diverse test setups.