Fluke 5500A, Service Manual

Page: 211 / 296

SC300 Option
Verification
6
6-85
Make sure the Calibrator Mainframe impedance is set to 50
Ω
(The blue softkey under
Output Z toggles the impedance between 50
Ω
and 1 M
Ω
).
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 6-50. Press
O
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 6-50.
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.
Table 6-49. DC Voltage Verification at 1 M
Ω
Nominal Value (dc) Measured Value (dc) Deviation (mV) 1-Year Spec.
(mV)
0.0 mV 0.10
5.0 mV 0.11
-5.0 mV 0.11
22.0 mV 0.15
-22.0 mV 0.15
25.0 mV 0.16
-25.0 mV 0.16
45.0 mV 0.21
-45.0 mV 0.21
50.0 mV 0.23
-50.0 mV 0.23
220.0 mV 0.65
-220.0 mV 0.65
250.0 mV 0.72
-250.0 mV 0.72
450.0 mV 1.22
-450.0 mV 1.22
500.0 mV 1.35
-500.0 mV 1.35
3.3 V 8.35
-3.3 V 8.35
4.0 V 10.10
-4.0 V 10.10
33.0 V 82.60
-33.0 V 82.60