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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
TH5xy series is used exceeds the applicable RF compliance level above, the TH5xy series should be observed to verify normal operation. If
abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the TH5xy series.
b. Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Guidance and manufacturer's declaration – electromagnetic immunity
The TH5xy series is intended for use in the electromagnetic environment specified below. The customer or the user of the TH5xy series should
assure that it is used in such an environment.
Immunity test
Electrostatic
6 kV contact
discharge (ESD)
8 kV air
IEC 61000-4-2
Electrical fast
transient/burst
2 kV for power supply lines
1 kV for input/output lines
IEC 61000-4-4
Surge
1 kV line(s) to line(s)
IEC 61000-4-5
2 kV line(s) to earth
<5 % UT
(>95 % dip in UT)
for 0,5 cycle
40 % UT
interruptions and
(60 % dip in UT)
voltage variations
for 5 cycles
on power supply
input lines
70 % UT
(30 % dip in UT)
IEC 61000-4-11
for 25 cycles
<5 % UT
(>95 % dip in UT)
for 5 sec
Power frequency
(50/60 Hz)
magnetic field
IEC 61000-4-8
NOTE UT is the a.c. mains voltage prior to application of the test level.
portable and mobile RF communications equipment and the ME EQUIPMENT or ME SYSTEM
The TH5xy series is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the
user of the TH5xy series can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and the TH5xy series as recommended below, according to the maximum output power of the
communications equipment.
Rated maximum output power
of transmitter
W
0,01
0,1
1
10
100
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters (m) can be estimated
using the equation applicable to the frequency of the transmitter, where P is the maximum output power rating of the transmitter in watts (W)
according to the transmitter manufacturer.
NOTE 1 At 80 MHz and 800 MHz, the separation distance for 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.
IEC 60601 test level
3 A/m
Recommended separation distances between
150 kHz to 80 MHz
d = 1,2
N/A
N/A
N/A
N/A
N/A
Compliance level
Floors should be wood, concrete or ceramic tile. If floors are
6 kV contact
covered with synthetic material, the relative humidity should be at
8 kV air
least 30 %.
Mains power quality should be that of a typical commercial
Not applicable
or hospital environment.
Mains power quality should be that of a typical commercial
Not applicable
or hospital environment.
Mains power quality should be that of a typical commercial
or hospital environment. If the user of the TH5xy series
Not applicable
requires continued operation during power mains
interruptions, it is recommended that the TH5xy series be
powered from an uninterruptible power supply or a battery.
Power frequency magnetic fields should be at levels
3 A/m
characteristic of a typical location in a typical commercial or
hospital environment.
Separation distance according to frequency of transmitter
80 MHz to 800 MHz
d = 1,2
Electromagnetic environment – guidance
m
0,12
0,38
1,2
3,8
12
800 MHz to 2,5 GHz
d = 2,3
0,23
0,73
2,3
7,3
23
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