Precision; Classification; Liability - vygon Plexygon Manuel De L'utilisateur

The maximum supplied current is the function of the resistance and of the
duration selected, as shown in the following figure:
mA
6
4
4.3

Precision

The total error on the current generation is of 0 . 2 % + 5mV; it remains then
always lower than 0 . 0 2 mA in the whole range of variation .
The error on the measurement of the supplied current is of around 0 . 0 1 mA
in the whole range 0 - 6 mA . Therefore, when the user sets a current, the
generated current has a precision better than 0 . 0 2 mA but, due to the following
measurement error, the processor could even read a current with a difference
of 0 . 0 2 mA as regards to the set current .
Then, the alarm of delivered current different from the set current, shown by
the blinking value on the LCD display, starts for differences higher than 0 . 0 2 mA,
in order to avoid fault readings .
4.4

Classification

Internally powered device whose applied part has been classified as
Type BF. Classification according to IEC 60529 norm: IPX0, i.e. not
protected against the ingress of liquids, degree of protection against
the ingress of solid bodies not evaluated . Not suitable for the use in
presence of anaesthetic mixtures fl ammable with air or oxygen or nitrogen
protoxide, suitable for continuous functioning .
4.5

Liability

The manufacturer is responsible for electrical safety of the device in normal
use, in usual conditions and in condition of first failure.
The liability on the safety, reliability and performances is only valid if:
- the stimulator has not been tampered in any way, and all adjustments,
modifications or repairs have been carried out by authorized personnel only;
- the stimulator has been used in conformity of the present instructions
for use .
R=1000 Ohm
Current limit for pulses of 50 µ
Current limit for pulses of 300 µ
Functioning zone
at a costant current
5 6.6 10
13
R=500 Ohm
s
s
15 20 KOhm
s
µ