Operator's Manual
DS7A - Constant Current Stimulator
Electromagnetic Immunity (Table 4)
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
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
3 Vrms
150 kHz to 80 MHz
3 V/m
80 MHz to 2.5 GHz
3 Vrms
3 V/m
Portable and mobile RF communications
equipment should be used no closer to any
part of the Digitimer DS7A, including cables,
than the recommended separation distance
calculated from the equation applicable to the
frequency of the transmitter.
Recommended separation distance
d = [3,5/3]
Å
P
d = [3,5/3]
Å
P 80MHz to 800Mhz
d = [7/3]
Å
P 800MHz to 2.5GHz
where
P
is the maximum output power rating
of the transmitter in watts (W) according to
the transmitter manufacturer and
d
is the
recommended separation distance in metres
(m).
Field strengths from fixed RF transmitters, as
determined by an electromagnetic site survey,
a
should be less than compliance level in each
frequency range.
b
Interference may occur in the vicinity of
equipment marked with the following symbol:
NOTE 1 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.
a
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless)
telephones and land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast
cannot be predicted theoretically with accuracy. To assess electromagnetic environment due to fixed
RF transmitters, an electromagnetic site survey should be considered. If measured field strength in
the location in which the Digitimer DS7A is used exceeds the applicable compliance level above, the
Digitimer DS7A should be observed to verify normal operation. If abnormal performance is
observed, additional measures may be necessary, such as re-orienting or relocating the Digitimer
DS7A.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Digitimer Ltd.
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Last Revised: February 1, 2017
