Guidance and manufacturer's declaration – electromagnetic immunity
The device is intended for use in the electromagnetic environment specified below.
The customer or the user of the device 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
3 Vrms
150 kHz to 80
MHz
3 Vrms
Portable and mobile RF communications equipment should
be used no closer to any part of the device, including
cables, than the recommended separation distance
calculated from the equation applicable to the frequency
of the transmitter.
Recommended separation distance
d= 1.167*√P
d= 1.167*√P 80 MHz to 800 MHz
d= 2.333*√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 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 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 fixe 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 this device is used exceeds
the applicable RF compliance level above, this device should be observed to verify normal operation. If
abnormal performance is observed, additional measures may be necessary, such as re-orienting or relocating
this device.
b
: Over the frequency range 150kHz to 80MHz, field strengths should be less than 3 V/m.
Recommended separation distance between portable and mobile RF communication equipment and
the pupillometer
This device is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or user can help prevent electromagnetic interference by keeping a minimum distance
between the RF portable and mobile communication device (transmitters) and the device, as recommended
below, depending on the maximum transmission power of the communication device.
Rated maximum output power of transmitter (W)
Separation distance according to
frequency of transmitter (m)
150kHz to
80MHz
d= 1.2 √P
80MHz to
800MHz
d= 1.2 √P
800MHz to
2.5GHz
d= 2.3 √P
0.01 0.12 0.12 0.23
0.1 0.38 0.38 0.73
1 1.2 1.2 2.3
10 3.8 3.8 7.3
100 12 12 23
USER MANUAL > GUIDANCE AND MANUFACTURER'S DECLARATION
ALM800 - Auto lensmeter > V1 - 05-2020 70
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