Zeiss Humphrey Field Analyzer 3, Инструкция по эксплуатации, Страница: 17 / 156

Guidance and manufacturer’s declaration - electromagnetic immunity
The HFA3 is intended for use in the electromagnetic environment specified below. The customer or user of the HFA3 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 3 Vrms

150 kHz to 80 MHz
3 V Portable and mobile RF communications equipment
should be used no closer to any part of the HFA3,
including cables, than the recommended separation
distance calculated from the equation applicable to
the frequency of the transmitter.
Recommended separation distance:
d 1.17 P =
150 kHz to 80 MHz
d 1.17 P =
80 MHz to 800 MHz
d 2.33 P =
800 MHz to 2,5 GHz
Recommended separation distance 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:
Radiated RF
IEC 61000-4-3 3 V/m

80 MHz to 2,5 GHz
3 V/m
Note 1: At 80 MHz and 800 MHz, the higher frequency 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 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 HFA3 is used
exceeds the applicable RF compliance level above, the HFA3 should be observed to verify normal operation. If abnormal performance is
observed, additional measures may be necessary, such as reorienting or relocating the HFA3.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
HFA3 Instructions for Use 2660021166131 Rev. A 2018-11
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Introduction 1-11