Calculate The Uncertainty Specifications Of Power And Dual Output Settings - Fluke 5502A Operator's Manual

1000
100
32.999 V
10
AC
Voltage
1.0
100 mV
33 mV
10 mV
and
45
Below
10 Hz
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:
=
U
Watts uncertainty
power
=
U
VARs uncertainty
VARs
Dual Output uncertainty
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):
1020 V
33 mA - 20.5 A
3.3 V
33 mA - 3 A
330 mV
65 100 500
+ +
2 2
U U
Voltage Current
+ +
2 2
U U
Voltage Current
= +
2 2
U U U
Dual Voltage
Introduction and Specifications
Not Specified
500 V
250 V
Not Specified
1 K 5 K 10 K - 30 K
Frequency
2
U
Phase
2
U
Phase
+
2
U
AuxVoltage Phase
Detailed Specifications
100 K 500 K
1-21
1