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Laserliner CableTracer Pro Manual

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CableTracer Pro
7C
Utilizàri bipolare (conductori de curent ĵi contracurent îmbinaķi)
Aceste mńsurńri pot Ö efectuate în circuite electrice corect conectate (fńrń puncte defecte). La ace-
stea emiŰńtorul se conecteazń la douń conductoare din acelaŭi cablu. Semnalul cu frecvenŰń înaltń al
emiŰńtorului revine prin conductoarele de curent ŭi contracurent la transmiŰńtor. Mńsurńtorile pot Ö efectu-
ate sub sau fńrń tensiune.
Adâncimea de reperare este de maxim 0,5 m ŭi depinde de materialul înconjurńtor.
Sfatul 11: La mńsurńtorile sub tensiune fazele individuale pot Ö deosebite (L1, L2, L3), de ex. la doze de
alimentare, fasunguri de lńmpi, întrerupńtoare de luminń etc.
– Din raŰiuni de siguranŰń circuitul de mńsurare trebuie sń Ö e scos de sub tensiune.
– La mńsurńtorile sub tensiune respectaŰi cu stricteŰe indicaŰiile de siguranŰń.
– Cablurile de împńmântare ŭi ecranńrile suplimentare din cablu reduc adâncimea de reperare a
receptorului.
– Ecranńrile din zona înconjurńtoare reduc raza de acŰiune (capacele metalice, cadrele metalice etc.).
!
7C-1 Detectarea scurtcircuitelor
EmiŰńtorul se conecteazń la cablul scurtcircuitat ŭi se porneŭte. Apoi receptorul se porneŭte ŭi se
declanŭeazń cńutarea. Receptorul recunoaŭte semnalul pânń la locul de scurtcircuitare, vezi Ö gura k.
Sensibilitatea receptorului ŭi puterea de ieŭire a emiŰńtorului se adapteazń treptat pânń când scurtcircuitul
este localizat.
Setare recomandatń la receptor: Mod de detectarea manualń, sensibilitate minimń, vezi Capitolul 5C.
– Circuitul de mńsurare se scoate de sub tensiune.
– ImpedanŰa la scurtcircuit trebuie sń Ö e mai micń de 20 Ohm. Aceasta poate Ö determinatń cu un
multimetru. În cazul în care impedanŰa > 20 Ohm, defecŰiunea poate Ö depistatń event. prin
intermediul detectńrii întreruperilor din cablu, vezi Capitolul 7B-2.
!
Exemple pentru utilizàrile unipolare
k
279
RO
Manual_CableTracer-Pro_Rev.0710_RO.indd 279 02.09.2010 11:18:03 Uhr
… 279 …


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