NorthEast Monitoring, Inc. NEMM019-Rev-O
Page 32 of 35
DR200/HE & DR300 Operator’s Manual
Appendices: Appendix D: EMC Information
Guidance and manufacturer’s declaration – electromagnetic immunity
The Northeast Monitoring DR200/HE and DR300 Digital Recorders are intended for use in the
electromagnetic environment specified below. The customer or user of the recorder should ensure 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 V
3 V/m
Portable and mobile communications equipment
should be used no closer to any part of the
Northeast Monitoring DR200/HE and DR300
Digital Recorder, including cables, than the
recommended separation distance calculated
from the equation applicable to the frequency of
the transmitter.
Recommended separation distance
d = 1.2
P
d = 1.2
P
80 MHz to 800 MHz
d = 2.3
P
800 MHz to 2.5 GHz
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 the 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 cannot be
predicted theoretically with accuracy. To assess the electromagnetic environment due to fixed RF
transmitters, an electromagnetic site survey should be considered. If the measured field strength
in the location in which the recorder is used exceeds the applicable RF compliance level above,
the recorder should be observed to verify normal operation. If abnormal performance is observed,
additional measures may be necessary, such as re-orienting or recorder
b
Over frequency range 150 KHz to 80 MHz, field strengths should be less than 3 V/m.