Fukuda Denshi VaSera VS-1500, Service Manual

Page: 212 / 216

Chapter 12 Information of the electromagnetic compatibility (EMC)
●
Recommended Separation Distance between Portable or Mobile RF Communication Equipment
and the VS-1500
The VS-1500 is intended for use in electromagnetic environments where radiated RF interference is
controlled. Electromagnetic interference can be suppressed by maintaining a minimum allowable
distance between portable or mobile RF communication equipment (transmitter) and the VS-1500. The
recommended minimum allowable distance depends on the maximum output power of the transmitter
as shown below:
Separation Distance (m) based on Transmitter Frequency
Rated Maximum
Output Power of
Transmitter (W)
26 to 80MHz
d = 1.2 P
80 to 800 MHz
d =1.2 P
800 MHz to 2.5 GHz
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
Use the same equation to determine the recommended separation distance d in meters (m) for the
rated maximum output power of transmitters not listed above. P in this equation is the rated maximum
output power in watts (W) of the transmitter provided by the manufacturer.
z Note 1: The separation distance for the higher frequency range should be applied for 80MHz
and 800MHz.
z Note 2: The above guideline is not applicable to every situation.
z Electromagnetic diffusion depends on reflection from buildings, objects and human beings
and how much they absorb.
● Interference generated by electrical scalpels
When used with an electrical scalpel having the specifications described below, this instrument is
protected against any malfunctions that the resulting interference could produce.
Immunity Test IEC 60601 test level Compatible Level Electromagnetic Environment/Guidance
Cutting mode Output power 300 W Output power 300 W
Coagulation
mode
Output power 100 W Output power 100 W
When an electrical scalpel generates
high-frequency energy the waveform
noise level that is indicated and recorded
by the instrument increases. However, it
returns to normal levels less in 10
seconds or less after the high frequency
energy ends.
Usable analysis results may not be
obtainable for analyses made of
waveforms during periods when
high-frequency energy is generated.
Confidential Copying Prohibited
12-5