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Calibration and Verification
Full Verification
3
3-29
3-19. DC Voltage One-Tenth Scale Linearity Test
Note
If the result of the previous test at 1V on the 11V range was less than
2.5
µ
V it is not necessary to perform this test.
This test uses the same equipment as the previous test. Proceed as follows to perform the
DC Voltage One-Tenth Scale Linearity Test:
1. Set the reference divider range to 10V. On the voltage reference standard, remove
the lead from the 10V high terminal and connect it under the binding post of the low
terminal along with the low lead to provide a 0V reference input to the reference
divider. Set the Calibrator output for 10V, then activate range lock for the 11V
range. Now set the Calibrator to 0V OPERATE.
2. Note the reading on the null detector. Press OFFSET on the Calibrator. Return the
lead on the voltage reference to the high output terminal.
3. Set the Calibrator to 10V. Use the Calibrator output adjustment knob to obtain the
reading previously noted on the null detector. Press SCALE on the Calibrator.
4. Set the Calibrator to 1V dc. Set the reference divider to the 1V range, and verify that
the null detector indicates less than 2.5 µV from the noted reading.
5. Press RESET on the Calibrator. This completes the DC Voltage Calibration
Verification testing.