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Guidelines for Identifying and resolving adverse EMC conditions
Emissions
Care has been taken through the design and manufacturing processes to minimise
the EM emissions that may be produced by this equipment. However, in the unlikely
event that the unit causes an EM disturbance to adjacent equipment, we suggest that
the procedure is carried out 'out of range' of the affected equipment.
Immunity
If the user has any doubt regarding the unit's EM immunity during routine operation,
we suggest that the source of EM disturbance is identified and its emissions reduced.
If the user has any doubt regarding the identification and resolution of adverse EM
conditions, they may contact Ultrasound Technologies Ltd to seek advice
EMC Testing
During conformity testing the Fetatrack 310 was subjected to International Standard EMC
tests. During the majority of these tests no non conformances were observed.
During EN60601-1-1:2001 testing the FetaTrack 310 was shown to be susceptible to the
following tests.
Conductive
Test applied a 3Vrms RF magnetic
disturbance induced
field to transducer cables with a 2Hz
by applied RF field
modulation.
Radiated RF
Test applied: 3V/m 80Mz to 2.5GHz
Electrical fast
Test applied: +/-2KV AC power, +/-
transients and bursts
1KV Signal Cables
Test applied: +/-2KV, +/-4Kv,
8KV Air Discharge, +/-2KV, +/-
Electro Static
4KV, +/-6KV Contact Discharge.
Discharge
Repetition Rate 1second
Test applied: +/-0.5KV, +/-1KV, +/-
2KV AC power line to ground, +/-
0.5KV, +/-1KV, +/-6KV AC power
Surge
line to line
Fetatrack310 Service Manual Issue3
©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T +44 (0) 1291 425425
Ultrasound Technologies Ltd
Electromagnetic Compatibility
Effect was a displayed rate of 115 to
125 bpm at each harmonic and sub
harmonic of the transducer frequency.
No disturbance was detected at other
frequencies
Effect was a disturbance to the UA
transducer causing a static UA
reading of up to 9 units
Effect was a FHR reading of 198 BPM
.
+/-
Effect was a FHR reading of 58 BPM .
Effect was a FHR reading of 58 BPM .
F: +44 (0) 1291 427093
Applied test signal is very high for high
sensitivity electronics and non applied
transducers. With correctly applied
transducers interference from in band
RF signals is unlikely.
Normal operation is unaffected and the
static reading can be cancelled by
pressing the toco zero button
Normal mains power is unlikely to cause
such a transient / burst. Displayed rate is
unlikely to occur when transducers are
connected to a patient.
Unit should be used in a low static
environment. Displayed rate is unlikely
to occur when transducers are
connected to a patient.
Normal mains power is unlikely to cause
such a surge. Displayed rate is unlikely
to occur when transducers are
connected to a patient.
E: ultratec@doppler.co.uk
Page 17
W:
www.doppler.co.uk
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