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Test procedure for analog system lines
Before to supply the lines of the control panel it is necessary to verify the following values:
NOTE: IT IS NECESSARY A DIGITAL TESTER
a) line resistance
Cause a positive and negative short-circuit at the of the installation and set the tester between (+) and (-) of
the line.
The resistance has to be lower than 40 Ohm.
b) line isolation
Eliminate the previous short-circuit. Set the tester between (+) and (-) of the line, with installed detectors and
modules verify:
b1)
Connect :
Tester (+) / Line (+) e Tester (-) / Line (-)
Verify :
Resistance: 1 - 1.3 MOhm
b2)
Connect :
Tester (+) / Line (-) e Tester (-) / Line (+)
Verify :
Resistance: 0.7 - 0.9 MOhm
c) Shield isolation of the cable/line
Set a tip of the tester on the monitor of the line cable and the other tip on the positive cable (+) of the same
line. The measured resistance has to be grater than 15-20 MOhm, better if "infinite". Carry out the same
procedure between the monitor and the negative cable (-). Verify that, even in this case, the resistance is
grater than 15-20 MOhm.
d) Earth isolation installation/lines
Set a tip of the tester on the earth of the installation and the other one on the positive cable (+) of the line;
the measured resistance has to be grater than 15-20 MOhm, better if "infinite". Carry out the same procedure
between the monitor and the negative cable (-). Verify that, even in this case, the resistance is grater than
15-20 MOhm.
e) Earth isolation installation/monitor of the cable
Set a tip of the tester on the earth of the installation and the other one on the cable shield the measured
resistance has to be grater than 15-20 MOhm, better if "infinite".
AM-1000
AM1000_manu
OR
STYLE 4
OR
STYLE 4
Installation manual
Doc. M-145.1-AM1000-ENG Rev A.2
STYLE 6
STYLE 6
PAGE - 11
NOTIFIER ITALIA
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