Widex TV-DEX User Instructions page 54

Voltage dips, short
interruptions and
voltage variations
on power supply
input lines
IEC 61000-4-11
Power frequency
(50/60 Hz)
magnetic field
IEC 61000-4-8
is the a . c . mains voltage prior to the application of the test level .
NOTE U
T
*) Battery powered equipment
<5 % U (>95 % TV-BASE:
T
Dips of:
dip in U ) for
T
0 . 5 cycle 100% (duration
40 % U (60 % 10ms and 20ms)
T
dip in U ) for 5 30% (duration
T
cycles 0 . 5 s) and
70 % U (30 % 10% (duration 5s)
T
dip in U ) for 25 reductions
T
cycles TV-CONTROLLER:
<5 % U (>95 % Not applicable *)
T
dip in U ) for 5 s
T
3 A/m 3 A/m
54
Mains power quality
should be that of a
typical commercial or
hospital environment .
If the user of the
TV-DEX requires
continued operation
during power mains
interruptions, it is
recommended that the
TV-DEX be powered
from an
uninterruptable power
supply .
Power frequency
magnetic fields should
be at levels
characteristic of a
typical location in a
typical commercial or
hospital environment