16-12 Calibration Model 6487 Reference Manual
Voltage source calibration
t^okfkd Hazardous voltages will be present during the following procedure.
Use care to avoid a shock hazard. The interlock must be closed to cali-
brate the 50V and 500V ranges. See Section 2 for interlock
information.
1. Set the DMM to measure DC volts and enable autoranging.
2. Temporarily short the ends of the DMM test leads together, then enable the DMM
REL mode. Leave REL enabled for the rest of the calibration procedure.
3. Connect the DMM to the Model 6487 V-SOURCE OUTPUT jacks (Figure 16-3).
4. Select the Model 6487 voltage source 10V range.
5. Press MENU, select CAL, then press ENTER. At the CAL: VSRC-RUN prompt,
press ENTER again. The unit will prompt for the negative full-range calibration
point:
V: -10V CAL
6. Press ENTER. The voltage source will be placed in operate and the instrument will
prompt for the negative full-scale calibration voltage:
-10.00000 V
7. Note the DMM voltage reading. Adjust the Model 6487 display to agree with that
voltage and then press ENTER.
8. Operate will turn off and the instrument will prompt for the zero calibration point:
V: 10V ZERO
9. Press ENTER. The voltage source will be placed in operate and the instrument will
prompt for the zero calibration voltage:
+0.00000 V
10. Note the DMM voltage reading. Adjust the Model 6487 display to agree with that
voltage and then press ENTER.
11. Operate will turn off and the unit will prompt for the positive full-range calibration
point:
V: +10V CAL
12. Press ENTER. The voltage source will be placed in operate and the instrument will
prompt for the positive full-scale calibration voltage:
+10.00000 V
13. Note the DMM voltage reading. Adjust the Model 6487 display to agree with that
voltage and then press ENTER.
14. Press EXIT to return to normal display.
15. Repeat steps 4 through 14 for the 50V and 500V ranges using Table 16-7 as a
guide.
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