Instruction manual

Mettler Electronics Corp. — Rev.M_11/19/14
14
Guidance and manufacturer’s declaration – electromagnetic immunity
The MTD 4000 is intended for use in the electromagnetic environment specified below.
The customer or the user of the MTD 4000 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 GHz
3 V/m
80 MHz to
2.5 GHz
3 V
3 V/m
Portable and mobile RF communications
equipment should be used no closer to
any part of the MTD 4000, 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 80MHz to 800 MHz
d = 2.3√P 800MHz 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 meters (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 and TV 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 MTD 4000 is used exceeds the applicable RF compliance level above, the MTD 4000
should be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such
as reorienting or relocating the MTD 4000.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.