Bravo pH Monitoring System 39 User Guide
chapter.fm 3/21/16 4:05 pm
5.5 x 7.75 inches (140 mm x 197 mm)
Recommended separation distance
Portable and mobile communication equipment
should be used no closer to any part of the
Bravo System, including cables, than the
recommended separation distance (d)
calculated from the equation applicable to the
frequency of the transmitter.
Conducted RF
IEC 61000-4-6
3 Vrms
150 kHz to 80
MHz
N/A (Battery-
powered device
with signal line
not longer than 1
meter.)
d = 1.2 P
Radiated RF
IEC 61000-4-3
3 V/m 80 MHz to
2.5 GHz
10 Vrms
150kHz to
80 MHz in
ISM bands
d = 1.2 P
[E
1
] = 3 V/m
412.224 - 455.616 MHz range is exclusion
band for the Bravo recorder in Rx mode.
The Bravo recorder in Rx mode has no
immunity against electromagnetic energy in this
band in order to perform its intended function.
The nearby electronic equipment may affect
the system.
Recommended separation distance:
d = 1.2 P, 80–800 MHz range
d = 2.3 P, 800–2500 MHz range
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 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 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 transmitters, an electromagnetic site survey should be
considered. If the measured field strength in the location in which the device is used exceeds the applicable
compliance level above, the device should be observed to verify normal operation. If abnormal performance is
observed, additional measures may be necessary, such as re-orienting or relocating the Bravo System.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 1 V/m.
Table 2. Electromagnetic immunity (continued)
Bravo recorder is intended for use in the electromagnetic environment specified below. The customer or the user of
Bravo recorder should assure that it is used in such an environment.
Immunity test EN 60601 test
level
Compliance
level
Electromagnetic environment – guidance
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