Check the listing for details. Keithley 230 Programmable Voltage Source. Condition: Used. Listed at 749.99 USD. Keithley 230 Programmable Voltage Source Comes with what you see in the pictures. If you don't see it, you probably won't get it. Specifications are from Keithley and may vary slightly due to upgrades, options, or revisions this unit may or may not have. This unit ships fully tested and guaranteed to work for 30-days, parts and labor, excluding freight. The Unit's Serial Number Tag Reads: Serial Number: 0551297 Key Features: ±50 µV to ±101 V DC output ±2 mA, ±20 mA, ±100 mA programming I-LIMIT Remote sensing Voltage Source Specifications: Range: Maximum Output: Accuracy (1 Year) 18°-28°C: Step Size: Temperature Coefficient/°C 0°-18°C & 27°-50°C 100 V ±101.00 V 0.05% + 50 mV 50 mV 0.005% + 0.5 mV 10 V ±19.995 V 0.05% + 10 mV 5 mV 0.005% + 100 µV 1 V ±1.9995 V 0.05% + 1 mV 500 µV 0.005% + 25 µV 100 mV ±199.9 mV 0.075% + 300 µV 50 µV 0.01% + 25 µV Maximum Current Limit: ±100 mA (-0, +20%). Selectable Current Limit: ±100 mA, ±20 mA, ±2 mA (-0, +20%). Line Regulation: < 0.01% for AC power line changes within specified limits. Noise: (150 µV + 50 ppm range) p-p, 0.1 Hz to 300 Hz; 5 mV p-p, 0.1 Hz to 300 kHz. Specification applies for local sensing only, typical. Response Time: < 3 ms to within 0.1% of programmed change for Current Limit of at least 20 mA. Transient Recovery Time: < 3 ms to rated accuracy for Current Limit of at least 20 mA. Output Impedance: Selected Current Limit: Output Impedance: 2 mA 1 mΩ + 10 mH 20 mA 1 mΩ + 2 mH 100 mA 1 mΩ + 1 mH Sensing: Rear panel selectable REMOTe and LOCAL sensing. Remote Sensing: Maximum Lead Drop (Per Lead): 0.5 V. Maximum Sense Lead Resistance (Per Lead): 5 Omega;. Program Memory: Number of Locations: 100. Range of Dwell Times: 3 ms to 999.9 s Accuracy of Dwell Time: ±(0.05% + 200 µs). External Trigger: TTL-compatible EXTERNAL TRIGGER INPUT and OUTPUT. Output Connections: Five-way binding posts for OUTPUT, OUTPUT SENSE, COMMON, COMMON SENSE, and CHASSIS GROUND; BNC (chassis isolated) connectors for EXTERNAL TRIGGER INPUT and OUTPUT. All connections on rear panel. IEEE-488 Bus Implementation Specifications: Multiline Commands: DCL, LLO, SDC, GET, GTL, UNT, UNL, SPE, SPD. Uniline Commands: IFC, REN, EOI, SRQ, ATTN. Interface Functions: SH1, AH1, T6, TE0, L4, LE0, SR1, RL1, PP0, DC1, DT1, C0, E1. Internal Programmable Parameters: Display Mode, Output, Prefix Data Format, EOI, SRQ (including mask for over Limit), Program Mode, Range, Trigger Mode, Termination Character, Inputs (Source, Limit, Dwell Time, 100-Point Memory Locations), Output Status, Digital Self Test. Digital I/O Port: A separate I/O port consiting of four input and four output lines as well as common (IEEE-488) and +5 V DC. Outputs will drive one TTL load. Inputs represent one TTL load. The 230 can be programmed to generate an "SRQ" upon any chance in the four bit input data. General Specifications: Display: 0.5 in LED digits, 4-1/2 digit signed mantissa, 1-digit signed exponent. Systems Compatibility: IEEE-488-1978. Limit Indications (Current Limit): "I-LIMIT" LED will blink. Maximum Allowable Common Mode Voltage (OUTPUT or OUTPUT COMMON to CHASSIS): 250 V rms, DC to 60 Hz. Self Test: Digital RAM, ROM, front panel LEDs upon power ON. EMC: Conforms to European Union Directive 89/336/EEC. Safety: Conforms to European Union Directive 73/23/EEC (meets EN61010-1/IEC 1010). Warm-Up: 1 hour to rated accuracy. Power: 105-125 or 210-250 V AC (internal switch selected), 50 or 60 Hz, 60 W maximum (80 VA maximum). 90-105 or 180-210 VAC operation available. Cooling: Internal fan for forced air cooling. Environmental Limits: Operating: 0° - 50°C, up to 35°C at 70% non-condensing relative humidity. Storage: -25° - 70°C. Dimensions: 127 mm H x 216 mm W x 359 mm D (5" x 8-1/2" x 14-1/8") Weight: 4.4 kg (9 lb 11 oz). For Domestic Customers: Packaging, handling, and order processing included in shipping in all domestic shipments as quoted by the shipping calculator. For International Customers there is a $15.00 minimum for packaging, handling, and order processing. International shipping to be determined by destination. Prior to shipment I will need to know the following information (filled out on a form that I will send you) for International Customers or Packages/Freight being Forwarded internationally. International customers may also be subject to a freight forwarder form if applicable.: (1) Are you the end-user of this item? (2) If you are not the ultimate end-user of the item, please state the ultimate end user's name. (3) What is the ultimate country destination? 03/29/18