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GMC-I Messtechnik GmbH 17
10 Diode Testing
Turn the selector switch to the position. Overload is indicated if no
device under test has been connected: “.0L V”.
Make sure that the device under test is voltage-free. Interference voltages
distort measurement results! Perform a voltage test first if required.
Connect the device under test as shown in the diagram.
Conducting Direction or Short-Circuiting
Conducting state voltage is displayed in volts at the measuring instrument. As
long as voltage drop does not exceed the maximum allowed display value of
5.1 V, several elements or reference diodes with minimal reference voltage can
be connected in series for testing. If “.0L” appears at the display, either the circuit
is interrupted or conducting state voltage is greater than 5.1 V.
Blocking Direction or Interruption
.0L is displayed at the instrument. If a value of less than 5.1 V is displayed, this
generally indicates that the diodes blocking direction is defective.
Note!
Resistors and semiconductor paths which have been connected in
parallel to the diode distort measurement results!
Conducting
Direction
Blocking
Direction
(max. 5.1 V)
17


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