Welch Allyn 690 - Electromagnetic Immunity

Directions for use 21
Electromagnetic Immunity
The Welch Allyn SureTemp Plus model 690 and 692 is intended for use in the electromagnetic environment specified
below. The customer or user of the Welch Allyn thermometer should assure that it is used in such an environment.
Immunity Test IEC 60601 Test
Level
Compliance Level Electromagnetic Environment - Guidance
Electrostatic
discharge (ESD)
IEC 61000-4-2
± 6 kV contact
± 8 kV air
± 6 kV contact
± 8 kV air
Floors should be wood, concrete, or ceramic tile. If
floors are covered with synthetic material, the
relative humidity should be at least 30%.
Electrical fast
transient/burst
IEC 61000-4-4
±2 kV for power
supply lines
±1 kV for input/
output lines
±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.
Surge
IEC 61000-4-5
±1 kV differential
mode
±2 kV common
mode
±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% U
T
(>95% dip in U
T
)
for 0.5 cycle
40% U
T
(60% dip in U
T
)
for 5 cycles
70% U
T
(>95% dip in U
T
)
for 25 cycles
<5% U
T
(>95% dip in U
T
)
for 5 seconds
<5% U
T
(>95% dip in U
T
)
for 0.5 cycle
40% U
T
(60% dip in U
T
)
for 5 cycles
70% U
T
(>95% dip in U
T
)
for 25 cycles
<5% U
T
(>95% dip in U
T
)
for 5 seconds
Mains power quality should be that of a typical
commercial or hospital environment. If the user of
the Welch Allyn SureTemp Plus 690 and 692
requires continued operation during power mains
interruptions, it is recommended that the Welch
Allyn SureTemp Plus be powered from an
uninterruptible power supply or battery.
Power frequency
(50/60Hz) magnetic
field
IEC 61000-4-8
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
T
is the AC mains voltage prior to application of the test level.