6
RESISTANCE MEASUREMENT
•
Red lead to “VΩmA”. Black lead to “COM”.
•
Set RANGE switch to desired Ω position.
• If the resistance being measured is connected to a circuit, turn off power and
discharge all capacitors before measurement.
• Connect test leads to circuit being measured.
• Read resistance value on the display.
DIODE MEASUREMENT
•
Red lead to “VΩmA”, Black lead to “COM”.
• Set RANGE switch to “
” position.
• Connect the red test lead to the anode of the diode to be measured and black
test lead to cathode.
• The forward voltage drop in mV will be displayed. If the diode is reversed,
figure “1” will be shown.
TRANSISTOR hFE MEASUREMENT
• Set RANGE switch to the hFE position.
• Determine whether the transistor is PNP of NPN type and locate the Emitter,
Base and Collector leads. Insert the leads into the correct pins of the hFE
socket.
• The meter will display the approximate hFE value at the condition of base
current 10μA and VCE2.8V.
AUDIBLE CONTINUITY TEST
•
Red lead to “VΩmA”, Black lead to “COM”.
• RANGE switch to “
” position.
• Connect test leads to two points of circuit to be tested. If the resistance is
lower than 30Ω ± 20Ω, the buzzer will sound.
CABLE TEST OPERATION
For example
：
test of double-twisted cables.
• Put cables into both main tester and remote tester.
• The LEDs of the main tester will turn on sequentially from 1 to G.
Main Tester:
1-2-3-4-5-6-7-8-G
Remote Tester:
1-2-3-4-5-6-7-8-G (RJ45)
1-2-3-4-5-6 (RJ11)
Fault description:
• The following are abnormal connections:
• If one cable for example cable No.3 is open circuit, the two No.3 LEDs of the
main tester and remote tester will not turn on.
Содержание D03305
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