BT-780 Operation manual
49
P/N : 780-ENG-OPM-EXP-R00
Bistos Co., Ltd.
2020.03
IEC 61000-4-11:2004
U
т)
for 25 cycles
<5 %
U
т
(> 95 % dip in
U
т )
for 5 s
U
т)
for 25 cycles
<5 %
U
т
(> 95 % dip in
U
т )
for 5 s
Power frequency (50 Hz and
60 Hz) magnetic field
IEC 61000-4-8:2010
3 A/m
3 A/m
Power frequency magnetic fields should be at
levels characteristic of a typical location in a
typical commercial or hospital environment.
NOTE
U
т
is the a.c. mains voltage prior to application of the test level.
The BT-780 is intended for use in the electromagnetic environment specified below.
The customer or the user of the BT-780 should assure that it is used in such an environment
Immunity test
IEC 60601 test level
Compliance level
Conducted RF IEC 61000-4-6:2009
3 Vrms 150 kHz to 80 MHz
3 Vrms
Radiated RF IEC 61000-4-3
3 V/m 80 MHz to 2.5 GHz
3 V/m
Electromagnetic environment - guidance
Portable mobile RF communications equipment should be used no closer to any part of the BT-780, including cables, than the
recommended separation distance calculated from the equation applicable to the frequency of the transmitter.
Recommended separation distance
d
－
1.2
�𝑝𝑝
(
d
－
3.5
�𝑝𝑝
)
d
－
1.2
�𝑝𝑝
(Resp:
d
－
3.5
�𝑝𝑝
) 80 to 800MHz
d
－
1.2
�𝑝𝑝
800M to 2.5GHz
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 deter-mined 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 BT-780 is used exceeds the applicable RF compliance level above, the BT-
780 should be observed to verify normal operation. If abnormal performance is observed, additional measures may be
necessary, such as re-orienting or relocating the BT-780.
b
Over the frequency range 150 kHz to 80MHz, field strengths should be less than 3 V/m
.
