Fluke 5500A, Service Manual

Page: 166 / 296

5500A
Service Manual
6-40
6-57. Leveled Sine Wave Amplitude Verification
This procedure uses the following equipment:
•
5790A AC Measurement Standard
•
BNC(f) to Double Banana Plug adapter
•
50
Ω
feedthrough termination
•
BNC cable supplied with the SC600
Refer to Figure 6-17 for the proper setup connections.
Set the Calibrator Mainframe to SCOPE mode, with the Levsine menu on the display.
Press
O
on the Calibrator Mainframe to activate the output. Then follow these steps
to verify the leveled sine wave amplitude.
1. Connect the BNC cable to the Calibrator Mainframe’s SCOPE connector. Connect
the other end of the BNC cable to the 50
Ω
feedthrough termination then to the
5790A INPUT 2 using the BNC(f) to Double Banana adapter.
2. Set the 5790A to AUTORANGE, digital filter mode to FAST, restart fine, and Hi
Res on.
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
voltage listed in Table 6-29.
5. Multiply the rms reading by the conversion factor of 2.8284 to convert it to the peak-
to-peak value.
6. Multiply the peak-to-peak value 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.
Table 6-29. Leveled Sine Wave Amplitude Verification
Calibrator
Mainframe
output
(@ 50 kHz)
5790A Reading
(V rms)
5790A Reading x
2.8284 (V p-p)
V p-p value x
correction
Tolerance
(V p-p)
5.0 mV 400
µ
V
7.5 mV 450
µ
V
9.9 mV 498
µ
V
10.0 mV 500
µ
V
25.0 mV 800
µ
V
39.0 mV 1.08 mV
40.0 mV 1.10 mV
70.0 mV 1.70 mV
99.0 mV 2.28 mV
100.0 mV 2.30 mV
250.0 mV 5.30 mV
399.0 mV 8.28 mV
0.4 V 8.3 mV
0.8 V 16.3 mV
1.2 V 24.3 mV
1.3 V 26.3 V
3.4 V 68.3 mV
5.5 V 110.3 mV