Keithley 6485 Instruction Manual page 194

15-4 Performance Verification
Table 15-1
Recommended performance verification equipment
Description
Calibrator
Electrometer Calibration
Standard
Low-noise coax cable
BNC-to-triax adapter
BNC shielding cap
BNC-to-double banana plug adapter
1
90-day, 23˚±5˚C full-range accuracy specifications shown. Uncertainty for 20µA output current does not meet the
recommended four-times better uncertainty specification.
2
23˚±3˚C accuracy of characterization.
Manufacturer/Model
Fluke 5700A
Keithley Model 5156
Keithley 4801
Keithley 237-BNC-TRX
Keithley CAP-18
Pomona 1269
Model 6485 Instruction Manual
Specifications
1
DC Voltage:
2V: 7ppm
20V: 5ppm
200V: 7ppm
1
DC Current:
20µA: 550ppm
200µA: 100ppm
2mA: 55ppm
20mA: 55ppm
2
Nominal Resistance:
100MΩ: 200ppm
1GΩ: 300ppm