Tyco 1928L manual Mains interruptions, it is recommended that

Guidance and manufacturer’s declaration-electromagnetic immunity-

for all EQUIPMENT AND SYSTEMS

Guidance and manufacturer’s declaration-electromagnetic immunity

The ET1928L is intended for use in the electromagnetic environment specified below. The customer or the user of the ET1928L should assure that it is used in such an environment.

Immunity test	IEC 60601	Compliance level	Electromagnetic environment-
test level			guidelines
Electrostatic	± 6 kV contact	± 6 kV contact	Floors should be wood, concrete or
discharge(ESD)	± 8 kV air	± 8 kV air	ceramic tile. If floors are covered with
IEC 61000-4-2			synthetic material, the relative humidity
			should be at least 30%.
Electrical Fast	± 2 kV for power	± 2 kV for power	Mains power quality should be that of a
transient/burst	supply lines	supply lines	typical commerical or hospital
			environment.
IEC 61000-4-4	± 1 kV for input/output	± 1 kV for input/output
	lines	lines
Surge	± 1 kV line(s) to line(s)	± 1 kV line(s) to line(s)	Mains power quality should be that of a
IEC 61000-4-5	± 2 kV line(s) to earth	± 2 kV line(s) to earth	typical commerical or hospital
			environment.
Voltage dips, short	<5% UT	<5% UT	Mains power quality be that of a
interruption and	(>95% dip in UT)	(>95% dip in UT)	typical commerical or hospital
voltage variations	for 0.5 cycle	for 0.5 cycle	environment. If the user of the ET1928L
on power supply			requires continued operation during power
input lines	40% UT	40% UT	mains interruptions, it is recommended that
	(60% dip in UT)	(60 % dip in UT)	the ET1928L be powered from an
IEC 61000-4-11	for 5 cycles	for 5 cycles	uninterruptible power supply or a battery.
	70% UT	70% UT
	(30% dip in UT)	(30% dip in UT)
	for 25 cycles	for 25 cycles
	<5% UT	<5% UT
	(>95% dip in UT)	(>95% dip in UT)
	for 25 cycles	for 25 cycles
Power frequency	3 A/m	3A/m	Power frequency magnetic fields
(50/60 Hz)			should be at levels characteristic of a
magnetic field			typical location in a typical commerical
			or hospital environment.
IEC 61000-4-8
NOTE UT is the a.c. mains voltage prior to application of the test level.

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