Prokit's Industries 3PK-600T - Manual (Page 5)

2. Set the rotary switch at desired A or A~ range position and connect test leads
in series with the load under measurement.
3. Read LCD display. The polarity of the red lead connection will be indicated when
making a DC measurement.
4. When only the figure”1” displayed, it indicates overrange situation and the higher
range has to be selected.
3.3 MEASURING RESISTANGE
1. Connect the black test lead to the COM jack and the read to the V/
Ωjack. (NOTE:
The polarity of red lead connection is positive
〝+〞)
2. Set the rotary switch at desired Ω position and connect test leads across the
resistor under measurement. Read LCD display.
Note:
1. For resistance above 1M
Ω, the meter may take a few seconds to get stable
reading.
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2. When the input is not connected,i.e. at open circuit, the figure “1” will be
displayed for the overrange condition.
3.. When checking in – circuit resistance, be sure the circuit under test has all power
removed and that all capacitors are fully discharged.
4. At 200M
Ω range display reading is around 10 counts when test leads are
Shorted. These counts have to be subtracted from measuring results. For example,
when measuring 100M
Ω resistance the display reading will be 101.0 and the
correct measuring result should be 101.0-1.0=100.0M
Ω.
3.4 TESTING DIODE
1. Connect the black test lead to COM jack and the red test lead to the V
Ω jack.
( NOTE: The polarity of red lead connection is positive
〝+〞)
2. Set the rotary switch at position and connect the red lead to the anode, the
black lead to the cathode of the diode under testing .The meter will show the
approx. forward voltage of the diode. If the lead connection is reversed. only figure
〝1〞will be displayed.
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3.5 TESTING TRANSISTOR
1. Set the rotary switch at hFE position.
2. Determine whether the transistor is NPN or PNP type and locate the Emitter. Base
and Collectors. Insert leads of the transistor into proper holes of the testing socket on
the front panel.
3. LCD display will show the approximate hFE value at the test condition of base
current 10 μA and Vce 3.2V.
WARNING
Before attempting to insert transistors for testing, always be sure that test leads
have been disconnected from any measurement circuits. Components should not
be connected to the hFE socket when making voltage measurements with test
leads.
3.6 CONTINUTITY TEST
1. Connect the black test lead to the COM jack and the red test lead to the V/
Ω jack.
2. Set the rotary switch at position and connect test leads across two points of
the circuit under testing. If continuity exists (i.e., resistance less than about 70
Ω),
built - in buzzer will sound.