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26 Finometer® Model-2
2.5
Protective measures
Cuff pressures on the finger up to 300 mmHg are practically painless
and do no harm unless applied for long periods. Finometer® Model-2
electrical circuits do not touch the skin and are not in contact with
body fluids. The following measures are taken for the safety and
comfort of the subject monitored and the convenience of the operator.
Electrical
•
Low cuff LED current (<30 mA), voltage (<1.8 V) and power
dissipation (<50 mW) prevent undue heating or skin irritation, or
electrical hazard.
•
An electrical short circuit in the cuff or the instrument cuts off cuff
pressure within 1 second.
•
An interrupted Frontend Unit cable or cuff cable cuts off pressure
within 1 second.
•
All analog signal outputs are fully short circuit proof.
•
A self test of vital instrumental functions and parameters is
performed every second.
Cuff pressure
•
Air pressure to the Frontend Unit is regulated to 380 mmHg
(500 hPa).
•
Pressure is limited to 380 mmHg.
•
A watchdog timer cuts off cuff pressure in case of internal computer
malfunction.
•
A cuff pressure greater than 250 mmHg sustained for 2.5 seconds
cuts off cuff pressure.
•
During the start procedure cuff pressure is limited to a maximum of
295 mmHg lasting less than 2 seconds.
User's Guide
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