Fluke 5500A - Calculating Power Uncertainty

Multi-Product Calibrator
Specifications
27
5500A Phase Specifications
1-Year Absolute Uncertainty, tcal + 5 °C, (∆Φdegrees)
10 to 65 Hz
0.15° [1]
65 to 500 Hz
0.9° [2]
500 to 1 kHz
2.0° [3]
1k to 5 kHz
6°
5k to 10 kHz
10°
Notes
1. For 33 to 1000 V output, burden current <6 mA. For 6 to 20 mA burden current (33
to 330 V), the phase uncertainty is 0.4°.
2. For 33 to 1000 V output, burden current <2 mA. For 2 to 5 mA burden current (33 to
330 V), the phase uncertainty is 1.5°.
3. For 33 to 1000 V output, burden current <2 mA. For 2 to 5 mA burden current (33 to
330 V), the phase uncertainty is 5°.
Phase
(Φ)
Phase
(Φ)
PF
Power Uncertainty Adder due to Phase Error
Watts VARs
10 to 65
Hz
65 to 500
Hz
500 to 1
kHz
1 to 5
kHz
5 to 10
kHz
0° 90° 1.000 0.00% 0.01% 0.06% 0.55% 1.52%
5° 85° 0.996 0.02% 0.15% 
10° 80° 0.985 0.05% 0.29% 
15° 75° 0.966 0.07% 0.43% 
20° 70° 0.940 0.10% 0.58% 
25° 65° 0.906 0.12% 0.74% 
30° 60° 0.866 0.15% 0.92% 
35° 55° 0.819 0.18% 1.11% 
40° 50° 0.766 0.22% 1.33% 
45° 45° 0.707 0.26% 1.58% 
50° 40° 0.643 0.31% 1.88% 
55° 35° 0.574 0.37% 2.26% 
60° 30° 0.500 0.45% 2.73% 
65° 25° 0.423 0.56% 3.38% 
70° 20° 0.342 0.72% 4.33% 
75° 15° 0.259 0.98% 5.87% 
80° 10° 0.174 1.49% 8.92% 
85° 5° 0.087 2.99% 17.97% 
90° 0° 0.000  
Note
1. To calculate exact ac watts power adders due to phase uncertainty for values not
shown, use the following formula:
()
()
Adder
Cos
Cos
%(
()
=−
+
100 1
Φ∆Φ
Φ
) . For example:
for a PF of .9205 (Φ = 23) and a phase uncertainty of
∆Φ
= 0.15, the ac watts power
adder is:
()
()
Adder
Cos
Cos
%(
(23 )
=−
+
=100 1
15
23
011%
.
).