strex SP45 - Resistance Measurement; Diode Test; Transistor Test

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Connect the red test lead to “V.Q.mA” jack and black testlead to the “ COM “ jack.
(The polarity of red lead is positive “ +” . )
Connect the red test lead to “ V.!l.mA” jack and the black
test lead to the “COM “ jack (The polarity of red lead is positive “ +” .).
Set the rotary switch at “ hFE” position.
Connect test leads across the resistor to be measured and read LCD display.
Connect the red test lead to the anode of the diode tc 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, only gure “ 1 “ will be shown .
Read the approximate hFE value at the test condition of base current 1 011-A and
Vee 3V.
If the resistance being measured is connected to a circuit, turn o power
and discharge all capacitors before applying test probes.
Set the rotary switch at desired “Ω” range position.
Set the r.otary switch at “-->+” position
Delermine whether the transistor under testing is NPN or PNP and locate the emitter,
base and collector leads. Insert the leads into proper holes of the hFE socket on
the front panel.
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RESISTANCE MEASUREMENT
DIODE TEST
TRANSISTOR TEST
NOTE:
To avoid electrical shock, remove test leads from measurement circu its
before testing a transistor.