Keithley 6482 - Calibration Adjustment Cycle; Recommended Calibration Adjustment Equipment

17-14 Return to Section Topics 6482-901-01 Rev. A / August 2012
Section 17: Calibration Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual
WARNING The maximum common-mode voltage (voltage between LO and chassis
ground) is 200 V DC. Exceeding this value may cause a shock hazard.
CAUTION Maximum signal on OUTPUT connectors is 30 V at 20 mA DC. Maximum signal
on INPUT connectors is 20 mA. Exceeding these values may result in damage
to the instrument.
Calibration adjustment cycle
Perform a calibration adjustment at least once a year to ensure the instrument meets or exceeds
its specifications.
Recommended calibration adjustment equipment
Table 17-5 lists the recommended equipment for the calibration procedures. You can use alternate
equipment if the equipment has specifications equal to or greater than those listed in the table.
When possible, test equipment specifications should be at least four times better than
corresponding Model 6482 specifications.
NOTE The sources listed in Table 17-5 do not meet the recommended four times better
uncertainty for certain output values. The Model 6482 may not meet factory calibration
accuracy specifications on these ranges, unless further steps are taken to characterize
the corresponding source ranges using more accurate equipment. Factory calibration
uses a transfer standard technique that yields uncertainties better than 4:1 for all
calibration points.
Table 17-5
Recommended calibration equipment
Description Manufacturer/model Specifications
Uncertainty
ratio
2
Meter/Source Keithley Instruments
Model 6430
Sub-Femtoamp
Remote SourceMeter
®
instrument with preamp
DC current 1.9 nA:
19 nA:
190 nA:
1.9 μA:
±0.155 %
±0.155 %
±0.208 %
±0.155 %
7.1:1
2.6:1
2:1
1.4:1
Calibrator Fluke 5700A
Multifunction Calibrator
DC current 19 μA:
190 μA:
1.9 mA:
19 mA:
±0.059 %
±0.011 %
±0.007 %
±0.007 %
3.5:1
9.8:1
31:1
17:1
Digital multimeter Keithley Instruments
Model 2001
DC voltage
1
20 V:
200 V:
±22 ppm
±30 ppm
45:1
33:1
1
90-day full-range accuracy specifications.
2
Ratio between test equipment uncertainty and Model 6482 uncertainty.