70
GENERAL INFORMATION ON USAGE AND MAINTENANCE
REQUIREMENTS FOR THE EXTERNAL DEVICE
The external device connected to the analog and digital interfaces must comply with the respective IEC or ISO
standards (e.g. IEC 60950-1 for data processing equipment and IEC 60601-1 for medical equipment).
Anybody connecting additional equipment to medical electrical equipment configures a medical system and is
therefore responsible that the system complies with the requirements for medical electrical systems. Attention
is drawn to the fact that local laws take priority over the above mentioned requirements. If in doubt, contact
your dealer or TOPCON (see the back cover).
Recommended separation distance between
portable and mobile RF communications equipment and the KR-800A
The KR-800A is intended for use in an electromagnetic environment in which radiated RF disturbances are con-
trolled. The customer or the user of the KR-800A can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications equipment (transmitters) and the KR-800A
as recommended below, according to the maximum output power of the communications equipment.
Rated maximum output power of trans-
mitter
W
Separation distance according to frequency of transmitter
m
150kHz to 80MHz
d = 1.2
80MHz to 800MHz
d = 1.2
800MHz to 2.5GHz
d = 2.3
0.01 0.12 0.12 0.23
0.1 0.38 0.38 0.73
11.21.22.3
10 3.8 3.8 7.3
100 121223
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in
metres (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.
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