Description
Keithley 220 Programmable Current Source IEEE-488 GPIB Benchtop Lab Instrument
The Keithley 220 is a precision programmable low-level current source designed for benchtop laboratory use. It sources DC current with high accuracy across a wide range of levels and is controlled either from the front panel or remotely via its IEEE-488 (GPIB) interface. The front panel features an LED numeric display, dedicated Program Mode selectors, and a full numeric Data Entry keypad for direct current programming.
Specifications & What's Included
- Manufacturer: Keithley Instruments
- Model: 220 Programmable Current Source
- Form Factor: Benchtop
- Display: LED numeric readout (front panel)
- Program Modes: Single, Continuous, Step
- Program Control: Reset, Start/Stop
- Output Control: Operate button
- Display Modes: Source, V-Limit, Dwell Time, Memory
- Data Entry: Numeric keypad with Copy, Enter, Exponent keys
- Remote Interface: IEEE-488 (GPIB) — Talk, Listen, Remote indicators on front panel
- External Trigger: Rear-panel BNC input and output
- Digital I/O: Rear-panel connector
- Rear Output Terminals: Output (1 TRIAX, 110V max), Guard (110V max output), Output Common, Chassis Ground (250V RMS max)
- Line Voltage: Selectable — 90-110V, 180-220V, or 210-250V AC
- Frequency: 50-60 Hz
- Fuse: Slowblow 3/8A, 180-250V
- Included: Unit only — no cables, probes, or documentation
Applications
The Keithley 220 is a classic precision current source from Keithley's long line of source-measure instruments, dating from the 1980s. It is used in laboratory settings where a stable, programmable DC current must be forced into a device under test — typical applications include four-wire (Kelvin) resistance measurement, Hall effect measurements, semiconductor characterization, materials research, and sensor calibration. The IEEE-488 (GPIB) interface allows the 220 to be integrated into automated test systems controlled by a PC or instrument controller, making it well suited for both manual bench work and scripted test sequences. It remains in use today in university physics and electrical engineering labs, semiconductor research facilities, and anywhere precision low-level current sourcing is required.
This Keithley 220 Programmable Current Source was pulled from a working lab environment where it had been previously in use. It has been visually inspected and photographed — the front panel, display, controls, and rear connectors all appear intact with no obvious damage. The unit shows cosmetic wear consistent with bench use, including some scuffing and handling marks on the case. Please review our full photo set for a close look at the cosmetic condition, and contact us with any questions before purchasing.
Warranty Information
Additional Information
Brand: |
Keithley |
Model: |
220 |
MPN: |
220 |
Type: |
Programmable Current Source |
SKU: |
46444 |
Form Factor: |
Benchtop |
Interface: |
IEEE-488 / GPIB |
Program Modes: |
Single, Continuous, Step |
Display: |
LED numeric display |
Output Connectors: |
Output, Guard, Output Common, Chassis Ground (rear) |
External Trigger: |
Yes — rear panel BNC |
Digital I/O: |
Yes — rear panel |
Line Voltage: |
90-110V / 180-220V / 210-250V selectable |
Fuse: |
Slowblow 3/8A, 180-250V |
Frequency: |
50-60 Hz |
Seller Notes: |
Unit only — no cables, probes, or documentation included. |
Country/Region of Manufacture: |
United States |
Condition Notes: |
This Keithley 220 Programmable Current Source was pulled from a working lab environment. Visually inspected — front panel, display, and rear connectors appear intact. Shows normal bench-use cosmetic wear. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |