Dc Voltage Verification; Verification At 1 M; Verification At 50 - Fluke 5520A Service Manual

6-44. DC Voltage Verification

This procedure uses the following equipment:
Hewlett-Packard 3458A Digital Multimeter
BNC(f) to Double Banana adapter
50 feedthrough termination
BNC cable supplied with the SC600
For DC voltage verification, refer to Figure 6-3 for the proper setup connections.
Set the Calibrator Mainframe to SCOPE mode, with the Volt menu on the display. Then
follow these steps to verify the wave generator function.

6-45. Verification at 1 M

For the 1 M verification, connect the Calibrator Mainframe's SCOPE connector to the
HP 3458A input, using the cable and the BNC(f) to Double Banana adapter.
Make sure the Calibrator Mainframe impedance is set to 1 M (The blue softkey under
Output @ toggles the impedance between 50
1. Set the HP 3458A to DCV, Auto Range, NPLC = 10, FIXEDZ = on.
2. Program the Calibrator Mainframe to output the voltage listed in Table 6-19. Press
on the Calibrator Mainframe to activate the output.
3. Allow the HP 3458A reading to stabilize, then record the HP 3458A reading for each
voltage in Table 6-19.
4. Compare result to the tolerance column.

6-46. Verification at 50

For the 50 verification, connect the SCOPE connector to the HP 3458A input, using
the cable and the 50
Make sure the Calibrator Mainframe impedance is set to 50
Output @ toggles the impedance between 50
1. Set the HP 3458A to DCV, Auto Range, NPLC = 10, FIXEDZ = on.
2. Program the Calibrator Mainframe to output the voltage listed in Table 6-20. Press
on the Calibrator Mainframe to activate the output.
3. Allow the HP 3458A reading to stabilize, then record the HP 3458A reading for each
voltage in Table 6-20.
Multiply the readings by (0.5 * (50 + Rload) / Rload), where Rload = the actual
feedthrough termination resistance, to correct for the resistance error. Compare result to
the tolerance column.
termination connected to the BNC to Banana Plug adapter.
and 1 M ).
(The blue softkey under
and 1 M ).
SC600 Option 6
Verification
6-29