Keithley
Keithley 6485
Picoammeter, 5.5 Digit, 10fA Resolution
100 pA to 20 mA (10 ranges) Measurement Range
10 fA Minimum Current Resolution
±500 V (protected) Maximum Input Voltage
0.1% reading accuracy Basic Accuracy
1000 readings per second Maximum Reading Rate

| Attribute | Value |
|---|---|
| Measurement Range | 100 pA to 20 mA (10 ranges) |
| Minimum Current Resolution | 10 fA |
| Maximum Input Voltage | ±500 V (protected) |
| Basic Accuracy | 0.1% reading accuracy |
| Maximum Reading Rate | 1000 readings per second |
| Interface | IEEE-488 (GPIB) and RS-232 |
| Display | 4½-digit vacuum fluorescent display (VFD) |
| Input Connector | Triax connector (3-lug) |
| Power Requirements | 100–240 VAC, 50–60 Hz, 15 VA maximum |
| Operating Temperature Range | 0°C to 50°C (32°F to 122°F) |
Keithley 6485 Options:
- 6485 - 4802-10 - Low Noise BNC Input Cable (longer length)
- 6485 - 4803 - Low Noise Cable Kit
- 6485 - 7007-1 - Shielded IEEE-488 Cable, 1m (3.3 ft)
- 6485 - 7007-2 - Shielded IEEE-488 Cable, 2m (6.6 ft)
- 6485 - 7007-4 - Shielded IEEE-488 Cable, 4m (13.1 ft)
- 6485 - 7009-5 - RS-232 Cable
- 6485 - 7754-3 - BNC to Alligator Cable, 0.9m (3 ft)
- 6485 - 8607 - Banana Cable Set for Analog Output
- 6485 - 8501-1 - Trigger Link Cable with Male Micro-DIN Connectors at each End, 1m (3.3 ft)
- 6485 - 8501-2 - Trigger Link Cable with Male Micro-DIN Connectors at each End, 2m (6.6 ft)
- 6485 - 8503 - DIN-to-BNC Trigger Cable
- 6485 - CS-565 - BNC Barrel Adapter
- 6485 - 7078-TRX-BNC - Female BNC to 3-Slot Male Triax for connecting BNC cable into triax fixture
- 6485 - 4288-1 - Single Fixed Rack Mounting Kit
- 6485 - 4288-2 - Dual Fixed Rack Mounting Kit
- 6485 - KPCI-488LPA - IEEE-488 Interface/Controller for the PCI Bus
- 6485 - KUSB-488B - IEEE-488 USB-to-GPIB Interface Adapter
- 6485 - 6485-3Y-EW - 1-year factory warranty extended to 3 years from date of shipment
- 6485 - C/6485-3Y-ISO - 3 (ISO-17025 accredited) calibrations within 3 years of purchase
| Model | 6485 |
|---|
The Keithley 6485 Picoammeter is a 5½-digit instrument offering precise current measurements from 20fA to 20mA, featuring 10fA resolution, high-speed autoranging, and eight current ranges.
It includes IEEE-488 and RS-232 interfaces, analogue output, and built-in Model 485 emulation for versatile use in industrial, medical, and test applications.
Testwall can supply the used Keithley 6485 Picoammeter, 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 6485 Picoammeter.





