Ac Field Measurement - MAGSYS IGM11 Operating Instructions Manual

The following shows the accuracies for DC-field measurements.

5.7.2 AC Field Measurement

In the operating mode AC field measurement the effective value (RMS) is calculated
from the determined AC field contributions. DC field contributions are automatically
suppressed in this type of measurement. The upper display area shows the gathered
DC field contribution. This might be especially helpful when an overflow is displayed
with low AC field amplitude.
The accuracy of the AC field measurement depends on the AC field's frequency and
wave shape.
The following shows the accuracies for AC field mesasurements.
Maximum ratings for sinusoidal signal
The error of the AC field measurement is composed of the error of the DC field meas-
urement and the error of frequency and shape factors.
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Field Strength
≤ 1.5 T
> 1.5 T
Note Please note that superimposed DC field contributions must not be so
large that they exceed the measuring range. A small AC field to-
gether with a DC field may result in a value overflow.
Frequency
≤ 2 kHz
≤ 5 kHz
Gaussmeter IGM11 Operating Instructions
Accuracy (1σ)
±0.5 %
±1.0 %
B Accuracy (1σ)
eff
≤ 1 T ≤ ±1.0 %
≤ 2 T ≤ ±2.0 %
Chapter 5 Operation