Keithley SourceMeter 3A 2420, Service Manual

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Calibration Programs C-3
4. Make sure the digital multimeter primary address is set to its factory default setting (22).
5. Make sure that the computer bus driver software (CECHP.EXE) is properly initialized.
6. Enter the QBasic editor, and type in the program below.
NOTE
Be sure to change the OneOhm parameter to the characterized value of 1
Ω
resistor.
(See Section 2 for details.)
7. Check thoroughly for errors, then save it using a convenient filename.
8. Run the program, and follow the prompts on the screen to perform calibration. For test
connections, refer to the following figures in Section 2:
• DMM volts connections: Figure 2-1.
• 10
µ
A to 1A range current connections: Figure 2-2.
• 1
Ω
resistor and DMM connections for 3A range: Figure 2-3.