Prokit's Industries MT-1217 - Manual (Page 12)

WARNING: DO NOT input any voltage at resistance range
for safety!
2-2-6.Diode and Continuity Test
A) Insert the black test lead to “COM” terminal and the red test
lead to “ ” terminal. (The polarity of red test lead is“+”).
B) Rotate the Range to “ “setting. Press “SELECT” button
to select the Diode measurement mode.
C) Forward Measurement: Connect the red test lead to the
diode positive polarity and the black test lead to the diode
negative polarity. The approximate value of diode forward
voltage drop will show on the display.
4. Backward Measurement: Connect the red test lead to the
diode negative polarity and the black test lead to the diode
positive polarity. “OL” symbol will be displayed on the
screen.
5. The complete diode testing includes forward and backward
measurement, if the result does not meet the above; it
means the diode is bad.
6. Press “SELECT” button to select the Continuity
measurement mode.
7. Connect the test leads to two points of the tested circuit. If
the built-in buzzer sounds, the resistance between the two
points is less than 50Ω.
Range Display Test Condition
Forward Voltage
Drop of Diode
Forward DC Current is
Approx. 0.5mA, Backward
Voltage is Approx. 1.5V
Buzzer makes
a long sound if
resistance is less
than 50Ω
Open circuit voltage is
Approx. 0.5V
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