Jeulin UT60A, Manual

Page: 27 / 34

Measurement and instrumentation
Multimeter model UT60A
Réf :
291 033
ENGLISH 26
5.2.1 Testing for Continuity
To test for continuity, connect the Multimeter as below:
1. Insert the red test lead into the HzV Ω terminal and the black test lead
into the COM terminal.
2. Set the rotary switch to and press BLUE button to select
measurement mode.
3. The buzzer sounds if the resistance of a circuit under test is less than
100 Ω .
Note:
•
The LCD displays O
L
indicating the circuit being tested is open.
5.2.2 Testing 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 a diode out of a circuit, connect the Multimeter as follows:
1. Insert the red test le ad into the HzV Ω terminal and the black test lead
into the COM terminal.
2. Set the rotary switch to press BLUE button to select
measurement mode.
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:
•
ln 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.
•
The LCD will display
OL
indicating open-circuit for wrong
connection.
•
The unit of diode is Volt (V), displaying the positive connection
voltage-drop value.
5.2.3 Resistance Measurement
The resistance ranges are: 400.0
Ω , 4.000k Ω , 40.00k Ω , 400.0k Ω , 4.000M Ω
and 40.00M Ω . To measure resistance, connect the multimeter as follows:
1. Insert the red test lead into the HzV Ω terminal and the black test lead
into the COM terminal.
2. Set the rotary switch to Ω , resistance measurement Ω is
defaults or press BLUE button to select Ω measurement mode.
3. Connect the test leads across with the object being measured.