Gaussmeter IGM11 Operating Instructions
Chapter 5 Operation
Page 30 / 106
MAGSYS
magne t
systeme
Version 01/2013
© 2013 MAGSYS magnet syste
me GmbH - All Rights Reserved.
The error of the AC field measurement is composed of the error of the DC field
measurement and the error of frequency and shape factors.
Error DC Field Measurement
(1
σ
)
B ≤ 1.5 T
≤ ±0.5 %
B ≥ 1.5 T
≤ ±1.0 %
Frequency Response Factor (Sinusoidal Field Pattern)
Frequency
Factor
2 kHz
1.00
5 kHz
0.98
7 kHz
0.95
10 kHz
0.90
Shape Factor (Sinusoidal Field Pattern)
Field Strength B
eff
Factor
700 mT
1.00
1000 mT
1.01
1500 mT
1.02
2000 mT
1.03
The frequency response factor and shape factor are multiplied with the basic
accuracy in dependence of the respective measuring parameters, and then added to
the basic accuracy.
Example:
Measuring B
eff
= 1000 mT at a frequency of 5 kHz.
The basic accuracy is 0.5 %. The frequency response factor is 0.9. The shape factor is
1.02.
The error from these factors is 0.95 · 1.02 = 0.97
≙
−3 %
For the measurement you have to calculate a total error of −3 % ± 0.5 %.
Trial Version
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