The HP/Agilent 6438B is a SCR-regulated DC power supply delivering 0–60 VDC at up to 5 A, with maximum output power of 300 W. It operates in both constant voltage (CV) and constant current (CC) modes, making it suitable for benchtop testing, system integration, and laboratory applications requiring stable, protected power delivery across a wide range of loads.
Technical Specifications
Output Ratings
• Voltage: 0 to 60 VDC
• Current: 0 to 5 ADC
• Power: 300 W maximum
AC Input
• Voltage: 105–125 VAC (nominal 115 VAC)
• Frequency: 57 to 63 Hz
• Current: 6.5 A at 115 VAC, 60 Hz, full load
• Single-phase
Regulation Performance
• CV Line Regulation: <30 mV for 105–125 VAC input change
• CV Load Regulation: <60 mV for 0–5 ADC load change
• CC Line Regulation: <50 mA for 105–125 VAC input change
• CC Load Regulation: <50 mA for 0–60 VDC load change
Ripple and Noise
• RMS Ripple: 120 mVrms (typical); increases 50% at 50 Hz input
• Transient Recovery: <300 ms to within 300 mV nominal after half-maximum current step
• Transient Amplitude: <1.0 V per ampere for 20–100% load changes
Stability
• Temperature Coefficient (CV): 0.05% + 15 mV/°C
• Temperature Coefficient (CC): 15 mA/°C
• Long-Term Stability (8 hours, CV): 0.15% + 45 mV
• Long-Term Stability (8 hours, CC): 50 mA
Metering
• Voltmeter: 0–64 VDC, 2% accuracy at full scale
• Ammeter: 0–6 ADC, 2% accuracy at full scale
• Large panel meters for continuous output monitoring
– Key Features
• Dual-mode operation (constant voltage and constant current)
• Isolated output terminals with separate ground connection
• Remote programming via rear panel (resistance or voltage control)
• Compact 19-inch rack-compatible chassis
– Physical Specifications
• Dimensions: 19" W × 3.5" H × 17.5" D (483 × 89 × 445 mm)
• Weight: 31 lb
• Finish: Light gray front panel; dark gray case
– Typical Applications
Electronic testing, device characterization, system development, and laboratory bench work requiring precise voltage and current control with fast transient response.
