Operating instructions
Page 28 of 34
7.5.3 Guidance and Manufacturer’s Declaration – Electromagnetic
Immunity - Non Life Supporting
Guidance and Manufacturer’s Declaration – Electromagnetic Immunity
The Sentry/ST System is intended for use in the electromagnetic environment specified below.
The customer or the user of the Sentry/ST System should assure that it is used in such an
environment.
Immunity
test
IEC 60601 test
level
Compliance
level
Electromagnetic environment – guidance
Conducted
RF
IEC
61000-4-6
Radiated
RF
IEC
61000-4-3
3 Vrms
150 kHz to 80
MHz
3 V/m
80 MHz to 2,5
GHz
3 Vrms
3 V/m
Portable and mobile RF communications
equipment should be used no closer to any
part of the Sentry/ST System, including
cables, than the recommended separation
distance calculated from the equation
applicable to the frequency of the transmitter.
Recommended separation distance
Pd 2.1
Pd 2.1
80 MHz to 800 MHz
Pd 3.2
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,
a
should be less than the compliance
level in each frequency range.
b
Interference may occur in the vicinity of
equipment marked with the following symbol:
NOTE 1: At 80 MHz and 800 MHz, 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.
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 Sentry/ST System is used exceeds the applicable RF compliance level
above, the Sentry/ST System should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as re-orienting or relocating
the Sentry/ST System.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.