Politec S.r.l. | Manual Ales – Ver. 1.7.2
16
Repeated false alarms
o
Use a screened cable to supply barriers, connecting screen to
GND on terminal block(it is suggested, if problem is not
solved, to use two different screened cables, one to supply
and one for alarm/tamper output);
o
Check correct dimension of cable used to supply barriers;
o
It is possible to increase barrier screening, connecting to
GND a cable coming from the screw that link sensor base to
metallic bracket;
o
If a switching power supply is used, substitute it with a
“linear” one to reject any kind of electrical power disturb
from line;
o
If possible, increase the alarm delay up;