Check the listing for details. Keithley 224 Current Source. Condition: Used. Listed at 2095.00 USD. Keithley 224 Current SourceItemMake: KeithleyModel: 224Item Specifics/Condition To be tested prior to shipment (Cal & ext warranty available upon request)Description Keithley 224 Current Source Description The Keithley 224 programmable current source was designed for general purpose bench or system use. The INCREMENT/DECREMENT function is manual or automatic, and selectable dwell times provide stepped ramp capabilities. Additional Features: Display: 0.5 in LED digits, 4½-digit signed mantissa, 1-digit signed exponent Maximum Allowable Common Mode Voltage (Output or Output Common to Chassis): 250 V RMS, DC to 60 Hz Increment/Decrement: automatic, manual or trigger modes Range of Dwell Times: 50 ms to 999.9 s Output Load: Output load must be non-inductive External Trigger: TTL-compatible External Trigger Input and Output Output Connections: Teflon® insulated 2-lug triax connector (specialty connector 30JR121-1) for output; five way binding posts for GUARD, OUTPUT COMMON and CHASSIS GROUND; BNC (chassis isolated) connectors for EXTERNAL TRIGGER INPUT and OUTPUT All connections on rear panel Images Term of sale Included Items: This sale does not include probes, cables, manuals,power cords or any other accessories unless otherwise stated or pictured.