EGAmaster EGATRONIK 58515 Manual De Instrucciones página 29

D. MEASURING DIODES AND CONTINUITY (see figure 6)
Warning!
To avoid damage to the Meter or to the equipement under test, disconnect circuit
porwer and discharge all high-voltage capacitors befire measuring diodes.
To avoid harms to you, never attempt to input voltages higher than 60V DC or 30V rms
in AC.
Measuring Diodes:
Use the diode test to check diodes, transistors, and other semiconductor devices. The diode
test sends a current through the semiconductor junction, and then measures the voltage drop
across the junction. A good silicon junction drops between 0.5V and 0.8V.
To test out a diode out of a circuit, connect the Meter as follows:
1. Insert the red test lead into the VΩ input terminal and the black test lead into the COM
terminal.
2. Set the rotary swich to
3. For forward voltage drop readings on any semiconductor component, place the red test lead
on the component's anode and place the black test lead on the component's cathode.
The measured value shows on the display.
Note
• In a circuit, a good diode should still produce a forward voltage drop reading of 0.5V to
0.8V; however; the reverse voltage drop reading can vary depending on the resistance of other
pathways between the probe tips.
• Connect the test leads to the proper terminals as said above to avoid error display. The
LCD will display "1" indicating open-circuit for wrong connection. The unit of diode is Volt (V),
displaying the positive-connection voltage-drop value.
• The open-circuit voltage is around 3V.
• When diode testing has been completed, disconnect the connection between the testing
leads and the circuit under test, and remove the testing leads away from the input terminal of
the Meter.
(figure 6)
.
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