g.tec medical engineering GmbH
g.USBamp, USB Biosignal Amplifier: Instruction for use
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V2.16.09
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Electromagnetic compatibility
Medical devices have to comply with special safety regulations regarding electromagnetic compatibility
(EMC). Please keep in mind the respective precautions in this instruction for use manual before
installing and operating g.USBamp. Pay attention to the fact that mobile HF-communication devices
(e.g. mobile phones) may interfere with medical electric devices. g.USBamp must not be used nearby
or stockpiled with other devices. Only the original components for g.USBamp (see Chapter
“g.USBamp basic components”) from g.tec medical engineering GmbH are to be used for this device.
Using third party manufacturer accessories may result in increased emission or decreased functional
immunity of g.USBamp. As electric and magnetic fields may interfere with the functional reliability of
the device, avoid using g.USBamp close to devices emitting powerful magnetic fields, e.g. magnetic
resonance machines, x-ray equipment.
Following values are below the values given by IEC 60601-1-2 for electromagnetic immunity testing:
Immunity test
IEC 60601 test level
Compliance
level
Conducted RF
IEC 61000-4-6
3 V
eff
150 kHz to 80 MHz
1
1
V
in V
Radiated RF
IEC 61000-4-3
3 V/m
80 MHz to 2.5 GHz
1
1
E
in V/m
The lower compliance levels are allowed (according to normative IEC60601-1-2, top 36.202.1 A) as
g.USBamp must be able to measure accurately biosignals having very low amplitudes. Using
electromagnetic interference suppression would yield to an inappropriate too low signal to noise ratio
for g.USBamp.
