Keithley 2500, Руководство по обслуживанию

Страница: 110 / 121

Model 2500 Service Manual Calibration Program C-3
General program instructions
1. With the power off, connect the Model 2500, calibrator, and the digital multimeter
to the IEEE-488 interface of the computer. Be sure to use shielded IEEE-488
cables for bus connections.
2. Turn on the computer, the Model 2500, and the digital multimeter. Allow the
Model 2500 and the multimeter to warm up for at least one hour before performing
calibration.
3. Make sure the Model 2500 is set for a primary address of 25. (Use the front panel
MENU/COMMUNICATIONS/GPIB selection to check or change the address.)
4. Set the calibrator primary address to 17 and digital multimeter primary address
to 16.
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.
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:
• Channel 1 bias voltage calibration connections: Figure 2-1.
• Channel 2 bias voltage calibration connections: Figure 2-2.
• Channel 1 current measurement calibration connections: Figure 2-3.
• Channel 2 current measurement calibration connections: Figure 2-4.