Immunity test
Electrostatic
discharge (ESD)
acc. to IEC
61000-4-2
A. Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless)
telephones and land mobile radios, amateur radio, AM and FM radio broadcast and TV
broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic
environment due to fixed RF transmitters, an electromagnetic site survey should be
considered. If the measured field strength in the location in which the device is used
exceeds the applicable RF compliance level above, the device should be observed to
verify normal operation. If abnormal performance is observed, additional measures may
be necessary, such as reorienting or relocating the device.
B. Over the frequency range 150kHz to 80 MHz, field strengths should be less than 3 V/m.
Note 1: At 80Hz and 800MHz, the higher frequency range applies.
Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reflection from structures, objects and people.
42
IEC 60601
test level
± 6 kV
contact dis-
charge
± 8 kV air dis-
charge
Compliance
level
± 6 kV
contact dis-
charge
± 8 kV air dis-
charge
Electromagnetic
environment - Guideline
Recommended separation
distance:
d = 3,5/3 * SQRT (P/W)
d = 3,5/3 * SQRT (P/W) 80
MHz to 800 MHz
d = 7/3 * SQRT (P/W) 800
MHz to 2,5 GHz
where P is the maximum
output power rating of
the transmitter in watts
(W) according to the
transmitter manufacturer
and d is the recommended
separation distance in
metres (m).
Field strengths from
fixed RF transmitters,
as determined by an
electromagnetic
site survey, should be less
than the compliance level
in each frequency range.
Interference may occur in
the vicinity of equipment
marked with the following
symbol: