Keithley
Keithley 248
High-Voltage Supply, 5kV
Up to 5000 V DC Output Voltage Range
Up to 10 mA Output Current
1 V Voltage Resolution
Positive and Negative (selectable) Output Polarity
±(0.02% + 2 V) Voltage Accuracy

| Attribute | Value |
|---|---|
| Output Voltage Range | Up to 5000 V DC |
| Output Current | Up to 10 mA |
| Voltage Resolution | 1 V |
| Output Polarity | Positive and Negative (selectable) |
| Voltage Accuracy | ±(0.02% + 2 V) |
| Current Limit | Adjustable, 0.1 mA to 10 mA |
| Power Input | 100/120/220/240 VAC, 50/60 Hz |
| Output Connector | High Voltage BNC (HV BNC) |
| Display | 3.5-digit LED display for voltage monitoring |
| Operating Temperature | 0°C to 50°C (32°F to 122°F) |
Keithley 248 Options:
- 248 - EW - 1 additional year of factory warranty
- 248 - 3Y-EW-STD - 1-year factory warranty extended to 3 years from date of shipment
- 248 - 5Y-EW-STD - 1-year factory warranty extended to 5 years from date of shipment
- 248 - RMK-1 - Single Fixed Rack Mount Kit: Mounts a single Model 248 in a standard 19-inch rack
- 248 - RMK-2 - Dual Fixed Rack Mount Kit: Mounts two Model 248s side-by-side in a standard 19-inch rack
- 248 - SHV - High Voltage Female-to-Female Cable, 3m (10 ft)
- 248 - MHV - High Voltage Female-to-Male Cable, 3m (10 ft)
| Model | 248 |
|---|
The Keithley 248 High Voltage Supply delivers reversible polarity, up to ±5000V output, low ripple <0.002%, and precision control via front panel, IEEE-488, or analog input. It features dual displays for voltage and current, and selectable filters to balance noise and response time.
Ideal for high-voltage resistivity, insulation resistance, component testing, breakdown analysis, and I-V measurements with compliance up to 5mA and programmable limits.
Testwall can supply the used Keithley 248, fully tested. With expert support and global delivery, Testwall ensures high-performance instrumentation with unmatched reliability and service quality. Please contact us directly if you need calibration or repair of the Keithley 248





