6
Guidance and manufacturer’s declaration - electromagnetic immunity
The HVO-500MD/550MD is intended for use in the electromagnetic environment specified below. The customer or the user
of the HVO-500MD/550MD should assure that it is used in such as 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 HVO-500MD/
550MD, including cables, than the recommended
separation distance calculated from the equation
appliance to the frequency of the transmitter.
Recommended separation distance
d
= 1.2
d
= 1.2
80 MHz to 800 MHz
d
= 2.3
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 meters (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 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 HVO-500MD/550MD is used exceeds the applicable
RF compliance level above, the HVO-500MD/550MD should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as reorienting or relocating the HVO-500MD/
550MD.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
