ETEKCITY TENS Unit User Manual page 32

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
Note: UT is the a.c. mains voltage prior to application of the test level.
32
Table 2 (cont.)
0% UT;
0.5 cycle At 0°,
45°, 90°, 135°, 180°,
225°, 270° and 315°
0 % UT;
1 cycle and 70% UT;
25/30 cycles
Single phase:
at 0° 0% UT; 250/300 cycles
30 A/m
0% UT;
0.5 cycle At 0°, 45°, Mains power quality should be that
90°, 135°, 180°, 225°, of a typical commercial or hospital
270° and 315° environment. If the user of the
0 % UT; device requires continued operation
during power mains interruptions, it
1 cycle and 70% UT; is recommended that the device be
25/30 cycles powered from an uninterruptible power
supply or a battery.
Single phase:
at 0° 0% UT;
Power frequency magnetic fields should
be at levels characteristic of a typical
30 A/m
location in a typical commercial or
hospital environment.