Dc Voltage Verification At 1 Mω - Fluke 5500A Service Manual

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 MΩ).
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.
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
Table 6-49. DC Voltage Verification at 1 MΩ
Measured Value (dc) Deviation (mV)
SC300 Option
Verification
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
6
6-85