Operator's Manual
DS7A - Constant Current Stimulator
Electromagnetic Immunity (Table 2)
The Digitimer DS7A is intended for use in the electromagnetic environment specified below. The customer
or the user of the Digitimer DS7A 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
±8 kV
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
±1 kV
Mains power quality should be that
of a typical commercial or hospital
environment.
Surge
IEC 61000-4-5
±1 kV differential
mode
±2 kV line(s) to
earth
±1 kV
±2 kV
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
(30 % dip in
U
T
)
for 25 cycles
<5 %
U
T
(>95 % dip in
U
T
)
for 5 sec
COMPLIANT
COMPLIANT
COMPLIANT
COMPLIANT
Mains power quality should be that
of a typical commercial or hospital
environment. If the user of the
Digitimer DS7A requires continued
operation during power mains
interruptions, it is recommended
that the Digitimer DS7A be powered
from an uninterruptible power
supply or a battery.
Power frequency (50/60 Hz)
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 a.c. mains voltage prior to application of the test level.
Digitimer Ltd.
53 of 58
Copyright © 2014
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Last Revised: February 1, 2017
