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The Keithley 248 High Voltage Supply, designed for use in the laboratory or for test applications, features reversible polarity, excellent regulation, and low output voltage ripple. The digital displays provide accurate readings of voltage and current, and digital entry of current and voltage values allow easy, precise setting of output values. Output voltage can be set from the front panel, via a remote analog voltage, or over the standard IEEE-488 interface. Voltage and current signals are also available for remote monitoring. Specifications. Output Voltage: 0 to ± 5000 V DC. Maximun Output Current: 5.000 mA DC. Voltage set Accuracy: ±(0.01% of setting + 0.05% of range). Voltage Display Accuracy: Voltage Set Accuracy ±1V, typical (±2V, max.). Voltage Resolution: 1V (set and display). Voltage Resettability: 1V. Voltage Limit Range: 0 to 100% of full scale. Voltage Regulation Line: 0.001% for ±10% line voltage change. Voltage Regulation Load: 0.005% for 100% load change, typical. Current Limit Accuracy: 0.01% + 2.5µA. Current Resolution: 1µA. Current Display Accuracy: Current Set Accuracy ±1µA, typ. (±2µA, max.). Stability: ±0.02% per hour typical for ambient temperature within 2°C. Temperature Drift: 50ppm/°C, 0° to 50°C, typical. Monitor Outputs; Output Scale: 0 to +10V for 0 to full range output regardless of polarity. Current Rating: 10mA maximum. Output Impedance: <1ohm. Accuracy: ±0.2% of full scale. Update Rate: 8Hz. External Vlotage Set; Input Scale: 0 to +10V for 0 to full range output regardless of polarity. Input Impedance: 1M-ohm. Accuracy: ±0.2% of full scale. Update Rate: 16Hz. Output Slew Rate: <0.3s for 0 to full range under full load.
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