Diode Test; Audible Continuity Test - Perel Tools EVM850 Handbuch

6.4. RESISTANCE
1. Connect the red test lead to the "VΩmA" jack and the black test lead to the "COM" jack (the red
lead has a positive polarity "+").
2. Set the rotary switch in the appropriate "Ω" range position.
3. Connect the test leads to the resistor to be measured and read the LCD display.
4. If the resistance being measured is connected to a circuit, turn off the power and discharge all
capacitors before applying the test probes.

6.5. DIODE TEST

1. Connect the red test lead to "VΩmA" jack and the black one to the "COM" jack (the red lead has
a positive polarity "+".).
2. Set the rotary switch in the "
3. Connect the red test lead to the anode of the diode to be tested and the black test lead to the
cathode of the diode. The approx. forward voltage drop of the diode will be displayed. If the
connection is reversed, the display will merely show a "1".
6.6. TRANSISTOR TEST
1. Set the rotary switch in the "hFE" position.
2. Determine whether the transistor under testing is NPN or PNP and locate the emitter, base and
collector leads. Insert the leads into the proper holes of the hFE-socket on the front panel.
3. Read the approximate hFE-value obtained under the following test conditions: a base current of
10µ A and Vce 3V.

6.7. AUDIBLE CONTINUITY TEST

1. Connect the red test lead to "VΩmA" and the black one to "COM".
2. Set the range switch in the "
3. Connect the test leads to two points of the circuit to be tested. If continuity exists, the built-in
buzzer will sound.
EVM850
" position.
" position.
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