Transistor Hfe Test - Wetekom 9804 Instruction Manual

• In the case of larger capacitance capacitors (> 10 µF) measuring will take
slightly longer.
• If the capacitor is defective or the capacitance is too large, the display will
show the overload symbol "1".
4.7 Transistor hFE Test (Current Amplification Factor)
Procedure
1. Set the rotary function switch (3) to the "hFE" position. In the Display
the correct measuring inputs into which the adaptor is to be inserted
are indicated as filled symbols (20).
2. Insert the adaptor into the two central
inputs („V/Ω/
shown.
3. Insert legs of the component to be tested
into the corresponding sockets (E,B,C resp. c,b,e) on the adaptor.
Please Notice! Ensure the Transistor Type and the terminals PNP or
4. Read the approximate current amplification factor from the display.
Test Condition: I
Emitter-Voltage) = 3 V
Hints:
• Insert the Emitter, Base and collector terminals of the transistor into the
correspondingly labelled sockets on the adaptor.
• Note that the result is not accurate for some special transistor types (such
as Darlington-Transistors), as they contain internal resistor networks.
• Always unsolder the transistor from the circuit for testing.
• It is not possible to measure hFE-values of FET or bipolar transistors.
• Incorrect measurements may occur when high voltages exist on junctions
of Power Transistors. The displayed value is not an absolute measure-
4. Taking Measurements
"- and „µA/mA"-input) as
NPN on the test socket are correctly matched.
(Base-Collector-Current) = 10 µA / V
BC
36
(Collector-
CE