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on the two sides of the testing resistor.
(6) DO NOT input voltage in the resistance range.
4.7. DIODE AND CONTlNUITY MEASUREMENTS
(I) Turn the rotary function switch to "
" position.
Press SELECT to choose diode measurement.
(The symbol
appears on LCD.)
Plug the red test lead in to "V
Ω
" terminal
and the black test lead into COM terminal (fig.8).
Please note that the red test lead is positive.
(2) Forward measurement: Connect red test lead
to diodes positive polarity and the black test lead
to its negative polanty. The LCD will display
the approximate value of forward voltage drop.
The value 500-800 is normal measurement value
for the silicone PN junction. If the LCD displays
"OL", it means the diode is in open circuit or it is
connected in reverse polarity.
(3) Backward measurement: Connect red test lead to diode's
positive polarity and the black test lead to its negative polarity.
The LCD will display "OL". If there is breakdown of creepage
on the diode, the LCD display a certain value.
(4) A complete diode testing includes forward and backward
measurements. If the result doesn't meet the descriptions above,
it means the diode is broken.
(5) Press SELECT to choose continuity test measurement.
The symbol
appears on the LCD.
(6)Touch the test leads to the test points.If the resistance
between the test points is less than (50±20)
Ω
, the buzzer alarms.
NOTE:
(I)To avoid damage to the meter, DO NOT input voltage in this
range.
(2) When measure a live circuit, make sure that all power sources
of the testing circuit are switched off and all capacitors are fully
discharged before measurement. The buzzer alarrns in response
to any negative electric potential or AC signal.
4.8. CAPACITANCE MEASUREMENT
(I) Turn the rotary function switch to "
" position.
Press SELECT to choose
measurement.
(2) Plug the red test lead in to "V
Ω
" terminal
and the black test lead into COM terminal (fig.9).
(3) lf there isremaining values on LCD before
measurement, press REL key to clear it.
(4) Plug the red test lead into "V
Ω
" terminal and