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Operating Instruction STERIclave B 2200 / 2200 P
10 Electromagnetic compatibility
Immunity tests
Conducted HF distur‐
bances according to
IEC 61000-4-6
Radiated HF disturban‐
ces according to IEC
61000-4-3
|
10.3 Electromagnetic Immunity
10.3 Electromagnetic Immunity
The STERIclave B has been designed for use in an environment like the one cited
below. The customer or user of the STERIclave B should ensure that it is used in
the correct environment.
IEC 60601 test level
3 V
eff
150 kHz to 80 MHz
Outside ISM bands
a
3 V/m
80 MHz to 2.5 GHz
Comment 1: At 80 MHz and 800 MHz, the higher frequency range applies.
Comment 2: These guidelines may not be applicable in every case. The spread of
electromagnetic waves is absorbed and reflected by buildings, objects and people.
The ISM frequency bands (for industrial, scientific and medical applications) bet‐
a
ween 150 kHz and 80 MHz are 6.765 MHz to 6.795 MHz; 13.553 MHz to 13.567
MHz; 26.957 MHZ to 27.283 MHz and 40.66 MHz to 40.70 MHz.
The conformance levels in the ISM frequency bands between 150 kHz and 80 MHz
b
and the frequency range of 80 MHz and 2.5 GHz are intended to reduce the pro‐
bability that mobile and portable communications equipment will produce distur‐
bances when they are unintentionally brought near the patient. For this reason, the
additional factor of 10/3 is used when calculating the recommended safe distances
within these frequency ranges.
The field strength of stationary transmitters such as base stations of mobile tele‐
c
phones and land mobile radio devices, amateur radio stations, AM and FM, radio
and television broadcasters cannot be theoretically predetermined. To determine
the electromagnetic environment of stationary transmitters, a study of the location
should be considered. When the measured field strength at the site where the STE‐
RIclave B is used exceeds the above conformance level, the STERIclave B should
be monitored to demonstrate proper function. When unusual performance features
are observed, additional measures may be necessary such as realigning or moving
the STERIclave B.
Conformance level
3 V
eff
10 V/m
73/78
Electromagnetic environment - gui‐
delines
Portable and mobile radio devices
should not be used closer to the
STERIclave B (and its electrical li‐
nes) than the recommenced safe
distance calculated using the equ‐
ation for the transmission frequen‐
cy.
Recommended safe distance:
d = 1.17
P
d = 0.35
for 80 MHz to 800 MHz
P
d = 0.70
for 800 MHz to 2.5 GHz
P
with P as the maximum rated power
of the transmitter in Watts (W) ac‐
cording to the transmitter manufac‐
turer, and d as the recommended
safe distance in meters (m).
The field strength of stationary ra‐
b
dio transmitters should be less than
the conformance level at all fre‐
quencies in an on-site check
Disturbances are possible close to
d
devices that have the following
symbol.
.
c
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