Weidmuller 125S Bedienungsanleitung Seite 13

s006_Model_125S 23.10.2003 12:42 Uhr Seite 13
Resistance Measurements
Set the Function switch Connect the test leads to
to the "Ω" position. the point of measure-
ments and read the value
Turn off power to the cir-
from the display.
cuit under test. External
voltage across the com-
ponents causes invalid
readings.
Connect the red test lead
to the "VΩ" jack and
the black test lead to the
"COM" jack .
Testing Diodes
Set the Function switch Reverse probes. If the
to . position. diode is good, "OL" is
displayed. If the diode is
Turn off power to the cir-
shorted, a value near
cuit under test. External
0 mV will be displayed.
voltage across the com-
ponents causes invalid If the diode is open, "OL"
readings. is displayed in both di-
rections.
To toggle between the
modes, press
Mode Switch .
Touch probes to the
diode. A forward-voltage
drop is about 0.6 V (typi-
cal for a silicon diode).
Continuity Measurements
Set the Function switch Connect the test leads to
to position. the two points at which
continuity is to be tested.
Turn off power to the cir-
The buzzer will sound if
cuit under test. External
the resistance is less
voltage across the com-
than approximately 20 Ω.
ponents causes invalid
readings.
To toggle between the
and modes, press
Mode Switch .
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