Dc Volts Calibration (30 Vdc And Above) - Fluke 5520A Service Manual

Step
1
2
3
4
5
6
7
8
9
HP3458A
Set the HP3458A
to external guard
Figure 3-1. Connections for Calibrating DC Volts up to 30 V
3-6.

DC Volts Calibration (30 Vdc and Above)

Use the following procedure to calibrate the dc voltage function (30 Vdc and above).
1. Prior to using the 752A, perform the self-calibration on the 752A using the null detector
and a 20 V source. See the documentation from the 752A for more details.
2. Connect the 5520A (unit under test), 752A, and HP3458A as in Figure 3-2. Make sure
that the ground to guard strap on the 752A is not connected.
3. The HP3458A should be used on the 10 Vdc range for all measurements. The 752A mode
switch should be set to 10:1 for the 30 V measurement, and to 100:1 for all voltages
above 30 V.
4. Measure and enter the values into the UUT for steps 7 through 9 in Table 3-3 (30 V and
above) as prompted.
5. Verify that the UUT is in Standby and disconnect the test equipment.
Table 3-3. Calibration Steps for DC Volts
5520A Output (NORMAL)
1.000000 V
3.000000 V
-1.000000 V
-3.000000 V
0.0000 mV
300.0000 mV
30.00000 V
300.0000 V
1000.000 V
Calibration and Verification
Calibration
UUT
5520A CALIBRATOR
NORMAL AUX SCOPE
V, , ,RTD A, -SENSE, AUX V
OUT
HI
1000V 20V
1V PK
RMS RMS
MAX
MAX MAX
150V
LO
PK
MAX
TRIG
20V
RMS
MAX
20V
PK
20A SHELLS
GUARD
NOT MAX
GROUNDED
20V PK MAX TC 20V PK MAX
yg102f.eps
3
3-7