Keithley 2010, Service Manual

Page: 37 / 134

DC current calibration
After the 1M
Ω
resistance point has been calibrated, the unit will prompt you for 10mA.
Follow these steps for DC current calibration:
1. Connect the calibrator to the AMPS and INPUT LO terminals of the Model 2010 as
shown in
Figure 2-3 .
2. Calibrate each current step summarized in Table 2-5 . For each step:
• Set the calibrator to the indicated DC current, and make sure the unit is in operate.
• Make sure the Model 2010 display indicates the correct calibration current.
• Press ENTER to complete each step.
• Allow the Model 2010 to finish each step.
NOTE If you are performing DC-only calibration, proceed to Setting calibration dates.
Table 2-5
DC current calibration summary
Calibration step Calibrator current Allowable range
10mA
100mA
1A 10.00000mA
100.0000mA
1.000000A 9mA to 11mA
90mA to 110mA
0.9A to 1.1A
2000 MULTIMETER
!
R
Output HI
Input
LO
Output
LO
Model 2010
5700A Calibrator
Amps
Note: Be sure calibrator is set for
normal current output.
Figure 2-3
Connections for DC
and AC amps
comprehensive
calibration
2-10 Calibration