Stanford Research PS370 – High Voltage Power Supply

The Stanford Research Systems PS370 is a high-voltage DC power supply engineered for precision laboratory and research applications requiring stable, adjustable negative voltage outputs. Operating across −100 V to −20 kV with maximum current of 500 µA and 10 W power output, the PS370 delivers exceptional voltage stability of 0.01% per hour with output ripple below 0.01% of full scale. The unit combines arc and short-circuit protection with programmable voltage, current limit, and current trip settings, making it suitable for sensitive experiments demanding low-noise performance.

Technical Specifications

• Output range: −100 V to −20 kV


• Maximum current: 500 µA


• Power output: 10 W


• Voltage set accuracy: 0.01% + 0.05% of full scale or 0.06% of full scale


• Voltage display accuracy: ±1 V typical, ±2 V maximum


• Voltage resolution and resetability: 1 V


• Voltage regulation: 0.001% for ±10% line change; 0.04% for 100% load change


• Output ripple (rms): <0.01% of full scale (300 Hz to 300 kHz)


• Slew rate: 14,000 V/s typical


• Discharge time: <6 seconds to <1% of full-scale voltage, no load


• Stored charge: <40 µC maximum Current Control


• Current limit range: 0 to 105% of full scale


• Current trip range: 10 µA to 105% of full scale


• Trip response time: <10 ms (excluding stored output charge)


• Current set accuracy: 1 µA or 0.5% of full scale


• Current resolution: 1 µA


• Current display accuracy: ±1 µA typical, ±2 µA maximum Stability & Performance


• Stability: 0.01% per hour, <0.03% per 8 hours


• Temperature drift: 50 ppm/°C from 10 to 40 °C typical


• Recovery time: 12 ms for 40% step load change


• Warm-up period: 1 hour for all specifications to apply

Key Features

• Dual large LED displays for voltage and current monitoring


• GPIB (IEEE-488) and RS-232 communication interfaces


• Analog I/O: 0 to +10 VDC input for programming; dual BNC outputs for voltage and current monitoring (0 to +10 V, 10 mA drive, 1 Ω output impedance)


• Front-panel indicators for limit state, remote mode, and rear analog input status


• Programmable protection with voltage limit, current limit, and current trip functions

Typical Applications

• High-voltage research and laboratory experiments


• Sensitive instrumentation requiring low ripple and noise


• Applications demanding precise voltage regulation and current control

Compatibility & Integration The PS370 integrates with standard laboratory automation systems via GPIB and RS-232 interfaces. Analog programming and monitoring via BNC connectors enable integration with external control systems and data acquisition equipment.