Keithley 2750 Service Manual

Model 2750 Multimeter/Switch System Service Manual Calibration 2-17
Model 2750 Calibration
DC current calibration
After the 1M resistance point has been calibrated, follow these steps for DC current
calibration:
1. Connect the calibrator to the AMPS and INPUT LO terminals of the Model 2750
as shown in Figure 2-3.
2. Perform the calibration steps listed in Table 2-10. For each step:
• Set the calibrator to the indicated current, and make sure the unit is in operate.
(Use the recommended current if possible.)
• Send the indicated programming command. (Change the current parameter if
you are using a different calibration current.)
• Wait until the Model 2750 completes each step before continuing.
NOTE If you are performing DC-only calibration, proceed to “Programming calibra-
tion dates.”
Tab le 2- 10
DC current calibration programming steps
Calibration
Step
Calibrator
Current Calibration Command* Parameter Range
10mA
100mA
1A
10.00000mA
100.00000mA
1.000000A
:CAL:PROT:DC:STEP10 10E-3
:CAL:PROT:DC:STEP11 100E-3
:CAL:PROT:DC:STEP12 1
9E-3 to 11E-3
90E-3 to 110E-3
0.9 to 1.1
*Change parameter if using different current.

Keithley 2750 Specifications

General

Interface	GPIB, RS-232, Ethernet
Switching Speed	Up to 500 channels/second
Maximum Voltage	300V
Operating Temperature	0°C to 50°C
Measurement Functions	DCV, ACV, DCI, ACI, 2-wire Resistance, 4-wire Resistance, Frequency, Temperature
Resolution	6.5 digits
Current	1A
Maximum Current	1A