Fluke 5520A Service Manual page 180

5520A
Service Manual
Set the Calibrator Mainframe to SCOPE mode, with the Levsine menu on the display.
Press
verify the leveled sine wave amplitude.
1. Connect the BNC cable to the Calibrator Mainframe's SCOPE connector. Connect
2. Set the 5790A to AUTORANGE, digital filter mode to FAST, restart fine, and Hi
3. Program the Calibrator Mainframe to output the voltage listed in Table 6-29.
4. Allow the 5790A reading to stabilize, then record the 5790A's rms reading for each
5. Multiply the rms reading by the conversion factor of 2.8284 to convert it to the peak-
6. Multiply the peak-to-peak value by (0.5 * (50 + Rload) / Rload), where Rload = the
Calibrator
Mainframe
output
(@ 50 kHz)
5.0 mV
7.5 mV
9.9 mV
10.0 mV
25.0 mV
39.0 mV
40.0 mV
70.0 mV
99.0 mV
100.0 mV
250.0 mV
399.0 mV
0.4 V
0.8 V
1.2 V
1.3 V
3.4 V
5.5 V
6-40
on the Calibrator Mainframe to activate the output. Then follow these steps to
the other end of the BNC cable to the 50 feedthrough termination then to the 5790A
INPUT 2 using the BNC(f) to Double Banana adapter.
Res on.
voltage listed in Table 6-29.
to-peak value.
actual feedthrough termination resistance, to correct for the resistance error. Compare
result to the tolerance column.
Table 6-29. Leveled Sine Wave Amplitude Verification
5790A Reading
(V rms)
5790A Reading x V p-p value x
2.8284 (V p-p)
Tolerance
correction (V p-p)
400 V
450 V
498 V
500 V
800 V
1.08 mV
1.10 mV
1.70 mV
2.28 mV
2.30 mV
5.30 mV
8.28 mV
8.3 mV
16.3 mV
24.3 mV
26.3 V
68.3 mV
110.3 mV