Fluke 5520A - 3-25. Verifying AC Current

Calibration and Verification
Performance Verification Tests
3
3-43
3-25. Verifying AC Current
Verify that the 5520A performance is within the limits in Table 3-27. Use the previously
verified UUT dc current function as the dc current source for making ac/dc current
transfers with the 5790A. Use the shunt values listed in Table 3-26. See Figure 3-17 for
proper equipment connections. For ranges 19 mA to 2 A, refer to Figure 3-7 and above
2 A, refer to Figure 3-8 for proper setup connections.
Table 3-26. Shunt Values for AC Current Verification
Range of Verification Points (rms values) Shunt
0 to 329.000 µA1 k Ω metal film resistor in a shielded box
1.9 mA to 3.29990 mA 200 Ω metal film resistor in a shielded box
19 mA to 3.3 mA Fluke A40 20 mA Shunt
30.0000 mA to 190 mA Fluke A40 200 mA Shunt
300.000 mA to 2 A Fluke A40 2A Shunt
2.99000 A to 20.0000 A Fluke A40A 20A Shunt
HI
LO
TRIG
GUARD
TC
20A
1000V
RMS
MAX
20V
RMS
MAX
20V
PK
MAX
1V PK
MAX
SHELLS
NOT
GROUNDED
NORMAL AUX
SCOPE
OUT
V, , ,
RTD
A, -SENSE,
AUX V
150V
PK
MAX
20V
RMS
MAX
20V PK MAX
20V PK MAX
5520A
CALIBRATOR
UUT5790A
Metal film
resistor
in enclosure
5790A
AC MEASUREMENT
STANDARD
1000V RMS MAX 1000V RMS MAX
3V RMS MAX
INPUT 1 INPUT 2
SHUNT
HI
LO
GUARDGROUND
SHELL FLOATING
10V PEAK
MAX
WIDEBAND
7V RMS MAX
MAX
10V PK
SHELL FLOATING
Set 5790A to
external guard
yg128f.eps
Figure 3-17. Connections for Verifying AC Current with a Metal Film Resistor (3.2999 mA and Below)