AMETEK CTS
H-Field Test
Operating Manual
V 1.20
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4.
Standards
Magnetic field tests are specified in three different standards, depending on the kind of phenomena
which shall be simulated.
IEC 61000-4-8
IEC 61000-4-9
IEC 61000-4-10
50/60Hz magnetic field
pulsed magnetic field
Damped oscillatory magnetic field
4.1.
IEC 61000-4-8
In IEC 61000-4-8 the test procedure for power frequency magnetic field test (50 Hz/60 Hz) is specified. The
devices under test are mostly systems which may be influenced by such fields, as monitors and hall sensors or
high-resolution graphical displays. Extreme field strengths are generated near to railway installations or near to
substations or power plants.
Continuous field
Short duration: 1 s to 3 s
Level
Magnetic field
strength [A/m]
Level
Magnetic field
strength [A/m]
1
1
1
------
2
3
2
------
3
10
3
------
4
30
4
300
5
100
5
1000
x
special
x
special
Antenna current
According IEC 61000-4-8 the standard defines a fix current for the given antenna loop 1m x 1m for each test level.
H Field [A/m]
1m x 1m antenna
1
1.15A
3
3.45A
10
11.5A
30
34.48A
100
114.95A
4.2.
IEC 61000-4-9
Pulsed magnetic fields are measured in the field due to the effect of direct lightning to buildings and structures of
electrical/industrial installations. The magnetic field strength ranges from a few hundred A/m (peak) up to several
kA/m (peak) in the proximity of earth conductors.
Level
Magnetic field strength [A/m]
1
--------
2
--------
3
100
4
300
5
1000
x
special
