Fluke 5502A - Calculate the Uncertainty Specifications of Power and Dual Output Settings

Introduction and Specifications
Detailed Specifications 1
1-21
33 mA - 20.5 A
3.3 V
500 V
250 V
330 mV
33 mV
32.999 V
1020 V
33 mA - 3 A
3.3 mA - 3 A
33 mA - 3 A
33 mA - 330 mA
Not Specified
Not Specified
AC
Voltage
Frequency
3.3 mA - 20.5 A
1000
100
10
1.0
100 mV
10 mV
and
Below
10 Hz
45 65 100 500 1 K 5 K 10 K - 30 K 100 K 500 K
Figure 1-4. Permissible Combinations of AC Voltage and AC Current for Power and Dual Output
Calculate the Uncertainty Specifications of Power and Dual Output Settings
Overall uncertainty for power output in watts (or VARs) is based on the root sum square (rss) of the individual
uncertainties in percent for the selected voltage, current, and, if AC power, the phase parameters:
Watts uncertainty
Phase
2
Current
2
Voltagepower UUUU
2
++=
VARs uncertainty
Phase
2
Current
2
VoltageVARs UUUU
2
++=
Dual Output uncertainty
Phase
2
AuxVoltage
2
VoltageDual UUUU
2
++=
Because there are an infinite number of combinations, you must calculate the actual ac power uncertainty for your
selected parameters. The results of this method of calculation are shown in the subsequent example. These examples are
at various selected calibrator settings (with 1-year specifications):