Declaration of Conformity
International Standards Laboratory
Report Number: ISL-00A105FB
NVLAP Lab. Code: 200234-0; VCCI: R-341, C-354; NEMKO Aut. No: ELA 113; BSMI Lab. Code: SL2-IN-E-0013
-24-
4.10 Appendix J: Accuracy of Measurement
Uncertainties
Contribution
Contribution
Radiation
Conduction
3 m
10 m
Phase
Neutral
System Repeatability
(assessment from 20 repeat
observation)
Normal (K=2)
?
0.56
?
0.5
?
0.20
?
0.20
Random
(assessment from 20
random observation)
Normal (K=2)
?
1.28
?
1.14
?
0.54
?
0.58
Receiver Specification
Rectangular
?
1
?
1
?
1
?
1
Antenna Factor Calibration
Normal (K=2)
?
2
?
2
NA
NA
Cable Loss Calibration
Rectangular
?
0.5
?
0.5
?
0.5
?
0.5
Combined Standard
Uncertainty Uc (y)
Normal
?
1.38
?
1.34
?
0.70
?
0.71
Total Uncertainty @95%
min. confidence probability
(U)
Normal (K=2)
?
2.76
?
2.68
?
1.40
?
1.42
Measurement Uncertainty Calculations:
Uc (y) = square root ( u
1
(y)
2
+ u
2
(y)
2
+ ..........+u
n
(y)
2
)
U = 2 * Uc (y)
Note: The measurement Uncertainties mentioned above also refer to NIS 81-1994 of NAMAS : The
treatment of Uncertainty in EMC Measurement.
