Vanguard PCI-600 - Manual (Página 13)

PCI-600 Manual de operación
3.5 Entrada externa de corriente
El PCI-600 tiene un amperímetro para corrientes externas, las bornas están señaladas con “EXT
CURRENT” el alcance son 10 A. This built-in ampere meter allows the user to monitor an AC
current. This current input is isolated. A typical application for this feature is to measure a CT
(Current Transformer) current ratio. The user can set the PCI-600 to output a current through the
CT primary input. The CT secondary output is measured with the PCI-600 “EXT CURRENT”
input. Both the PCI-600 output current and the CT secondary current are displayed on the LCD
allowing the user to easily calculate the CT current ratio. The External Current’s polarity with
respect to the PCI-600 drive current is indicated on the LCD by a “+” sign (in phase) or a “-“
sign (out of phase). Proper phasing is indicated when the same colored PCI connectors are
connected to corresponding terminals on the CT. For example: Red Current connector to H1 /
Red External Current connector to X1 and Black Current connector to H2 / Black External
Current connector to other “X” terminals.
Figure 4.0 Bornas para corriente externa
3.5 Control de contraste del LCD
Para cambiar el contraste a la pantalla del PCI-600 LCD pulse y mantenga la tecla con la
flecha que aparece en la figura 5.0. El contraste aumentará hasta que se alcance el punto de
mayor oscuridad a partir del cual se iniciará el ciclo desde el punto de mayor claridad. Cuando
la tecla de la flecha se deja de pulsar el ajuste de contraste quedará almacenado.
Figura 5.0 Control de contraste del PCI-600
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