FLYGT FLS Manuel d'installation et d'application - Page 7

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To be noted

A zero current may be the result of a broken sensor

lead or an open thermal switch.

A leakage alarm may be caused by a short circuit due

to pinched sensor leads or a correct leakage signal

from FLS, FLS10 or CLS.

Checking earth faults

Earth faults on the monitoring cores must be checked

for and avoided as they may cause spurious seal

leakage indications. Fault finding of this nature should

only be carried out using a multimeter ohms scale and

not an insulation tester utilising 500 V or above as a

test voltage.

Measure between each sensor lead and earth. Ideally

the value should be infinite but Mega ohm values are

acceptable.