Keithley 2500, Руководство по обслуживанию

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2-12 Calibration Model 2500 Service Manual
Step 4. Channel 2 voltage source calibration
Follow the steps below to calibrate both channel 2 bias voltage ranges. Table 2-4 summa-
rizes calibration ranges and voltages.
1. Connect the DMM to the Model 2500 channel 2 INPUT and OUTPUT jacks, as
shown in
Figure 2-2 . (Connect DMM INPUT HI to the VOLTAGE SOURCE
OUTPUT CHANNEL 2 jack; connect DMM INPUT LO to the inner shield of the
INPUT CHANNEL 2 jack.)
2. Select the DMM DC volts function, and enable auto-range.
3. From normal display, press the Model 2500 SRC2 key, then set the channel 2 volt-
age bias source to the 10V range using the RANGE
key.
4. Press the MENU key, select CAL, then press ENTER.
5. Select EXECUTE, then press ENTER to enter the CAL EXECUTION menu.
6. Select V-CAL then press ENTER. The unit will display the following:
V-CAL CHANNEL SELECT
CHAN-1 CHAN-2
7. Select CHAN-2, then press ENTER. The instrument will prompt for +10V
calibration:
V-CAL
2
Press ENTER to 10.000 V
8. Press ENTER. The instrument will display the following message:
DMM RDG: 10.0000V
Use , , , , ENTER or EXIT.
9. Note the DMM voltage reading, then use the EDIT keys to adjust the Model 2500
display value to agree with that reading.
10. Press ENTER. The unit will prompt for the 0V calibration point:
V-CAL
2
Press ENTER to Output 00.000V
11. Press ENTER. The instrument will display the following message:
DMM RDG: 00.00000 V
Use , , , , ENTER or EXIT.
12. Note the DMM voltage reading, then use the EDIT keys to adjust the Model 2500
display value to agree with the reading.
13. Press ENTER. The unit will display the prompt for the -10V calibration point:
V-CAL
2
Press ENTER to Output -10.000V