Fluke 5520A Service Manual page 224

5520A
Service Manual
2. Program the Calibrator Mainframe to output the voltage listed in Table 6-44. Press
3. Allow the HP 3458A reading to stabilize, then record the HP 3458A reading for each
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 (1-year spec.) column.
Nominal Value (dc)
0.0 mV
5.0 mV
-5.0 mV
22.0 mV
-22.0 mV
25.0 mV
-25.0 mV
45.0 mV
-45.0 mV
50.0 mV
-50.0 mV
220.0 mV
-220.0 mV
250.0 mV
-250.0 mV
450.0 mV
-450.0 mV
500.0 mV
-500.0 mV
3.3 V
-3.3 V
4.0 V
-4.0 V
33.0 V
-33.0 V
6-84
on the Calibrator Mainframe to activate the output.
voltage in Table 6-44.
Table 6-43. DC Voltage Verification at 1 M
Measured Value (dc) Deviation (mV)
1-Year Spec.
(mV)
0.10
0.11
0.11
0.15
0.15
0.16
0.16
0.21
0.21
0.23
0.23
0.65
0.65
0.72
0.72
1.22
1.22
1.35
1.35
8.35
8.35
10.10
10.10
82.60
82.60