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Rev. 1.03
1.1 LINE CABLE TEST PROCEDURE BEFORE LOOP CONNECTION
1.1.1 Line continuity
Check the resistor of line electro conductive cables with tester at 200
Ω
of resistor for line
electro conductive cables superior to 40
Ω
is too high!!
Possible causes can be:
-
the line is too long;
-
loose clips;
-
false contacts;
-
cable of insufficient section;
-
partly cut off or damaged cable.
The cables must usually present a resistor between 10 and 15
Ω
.
Besides the resistor of the negative cable and the positive one must result similar.
1.1.2 Isolation b / - of loop
With tester at 20K
Ω
and the detectors insert, it must measure a about value of the end of line
resistor.
PART 1
PRELIMINARY REMARKS FOR A CORRECT WORKING
