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(2) Toegepaste normen
werking: IEC/EN61557-1, IEC61557-3
veiligheid: IEC/EN61010-1 Cat. III (300V) instrument
IEC/EN61010-2-31 Cat. III (300V) snoer
beschermingsindex: IEC60529 (IP54)
(3) Kenmerken
Zonder batterijen
Elk van deze modellen werkt zonder batterijen en wordt
gevoed door de systeemspanning
Bedradingscontrole
Drie diodes duiden aan of de bedrading van de testkring
correct is. De P-E en P-N diodes lichten op als de
bedrading van de testkring correct is. De ( ) diode licht
op bij omgekeerde polariteit van P en N.
Oververhittingsbeveiliging
Detecteert oververhitting van de interne weerstand en
geeft het waarschuwingssymbool ( ) weer; elke verdere
meting wordt automatisch stopgezet.
Overspanningsbeveiliging
Als de spanning tussen VL-PE 260V of meer bedraagt, wordt
de meting stopgezet en verschijnt het bericht VL-PE Hi.
D-LOK circuit
Model 4120A heeft een uniek D-LOK circuit dat het
overbruggen van de meeste verliesstroomschakelaars
overbodig maakt.
15mA lusmeting
Het meten van de lusimpedantie in het 2000bereik wordt
uitgevoerd met lage teststroom (15mA). De stroom zal de
betrokken verliesstroomschakelaar niet activeren, zelfs niet
diegene met de laagste nominale verliesstroom (30mA).
Uitlezing
LCD,3 1/2digit met decimaal punt en meeteenheden (
, A, kA, V)
Manuele modus en Autotestmodus
Manueel: druk op de testknop en laat hem weer los. Het
resultaat verschijnt gedurende 3 sec. en het scherm keert
daarna terug naar AC spanning.
Bereik
Lus 200/Kortsluitstroom 200A
Lus 20/Kortsluitstroom 2000A, 20kA
D-LOK werkspanning
190V 253V
205V 253V
7


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