
Electromagnetic environment
-guidance
Electrostatic
discharge (ESD) IEC
61000-4-2
Floors should be wood, concrete
or ceramic tile. If floors are covered
with synthetic material, the relative
humidity should be at least 30 %.
Electric fast
transient/ burst IEC
61000-4-4
±2 kV for power
supply lines
±1 kV for
input/output lines
Mains power quality should be
that of a typical commercial or
hospital environment.
±1 kV differential
mode
±2 kV common
mode
Mains power quality should be
that of a typical commercial or
hospital environment.
Voltage dips, short
interruptions and
voltage variations on
power supply input
lines IEC 61000-4-11
<5 % UT(95% dip
inUT.) for 0.5 cycle
40 % UT
(60% dip in
UT )for 5 cycles
70 % UT(30% dip
inUT) for 25 cycles
<5 % UT(95% dip
inUT)for 5 sec.
Mains power quality should be
that of a typical commercial or
hospital environment. If the user of
the upper arm style requires
continued operation during power
mains interruptions, it is
recommended that Dr Trust BP
Check with MDI be powered from
an uninterruptible power supply or
a battery.
Power frequency
(50/ 60 Hz) magnetic
field IEC 61000-4-8
Note: U
T is the a.c. mains voltage prior to application of the test level.
Electromagnetic environment - guidance
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
3 Vrms 150 kHz
to 80 M Hz 80%
AM (2Hz)
3 Vrms 80 MHz
to 2.5 GHz 80%
AM (2Hz)
Portable and m obile RF com munications equipm ent
should be used no closer to any part of Dr Trust BP Check
with MDI , including cables, than the recom mended
separation distance calculated from the equation
applicable to the frequency of the transmitter.
Recomm end separation distance
3V
d = 1.2×p
1/2 80Mhz to 800 MHz
d = 2.3×p
1/2M Hz to 2.5 GHz
Where P is the m aximum output power rating of the
transmitter in watts (W) according to he transmitter
manufacturer and d is the recomm ended separation
distance in meters (m).
Field strengths from fixed RF transmitters as determ ined
by an electromagnetic site survey
a, should be less than the
com pliance level in each frequency range
b. Interference
may occur in the vicinity of equipm ent marked with the
following symbol: