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NOTE: If necessary to reach the immunity test
level, the distance between the transmitter
antenna and multipiezo can be reduced to 1
m. The test distance of 1 m is allowed by
IEC 61000-4-3.
11.6
Immunity to Proximity Magnetic Fields in the
Frequency Range 9 kHz to 13,56 MHz
The following table reports the test specifications for ENCLOSURE PORT IMMUNITY to proximity
magnetic fields in the frequency range 9 kHz to 13,56 MHz.
Test Frequency
30 kHz
a)
134,2 kHz
13,56 MHz
a) This test is applicable only to devices intended for use
in the HOME HEALTHCARE ENVIRONMENT.
12
TROUBLESHOOTING
12.1
Diagnostic System and Symbols on the Keyboard
multipiezo is provided with a diagnostic circuit that allows the detection of malfunctions and
viewing of their type on the touch keyboard by means of a symbol. Users, by using the following
table, are guided to identifying and the possible resolution of the malfunction detected.
Symbol on keyboard
Modulation
CW
Pulse modulation
2,1 kHz
b)
Pulse modulation
50 kHz
b)
Possible cause
Cord electrical contacts wet
multipiezo handpiece not
connected to the appliance
Faulty handpiece
Tuning circuit malfunction
TROUBLESHOOTING
WARNING: Portable RF communication
equipment (including peripheral devices such
as antenna cables and external antennas)
must not be used closer than 30 cm to any
part of the multipiezo device, including
the cables specified by the manufacturer.
Otherwise, there may be a performance
degradation of these appliances.
Immunity test level (A/m)
8
65
c)
7,5
c)
b) The carrier shall be modulated using a 50% duty cycle
square wave signal.
c) r.m.s., before modulation is applied.
Thoroughly dry the contacts
with compressed air.
Connect the handpiece.
Replace the handpiece
Contact an Authorised Mectron
Service Centre.
Solution
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