Diode Test - Minipa ET-3021 Manual De Instrucciones

4. The reading must be done in blue scale indicated as hFE. The
measured value is equivalent to Ic/Ib, or either, the DC magnifica-
tion factor of transistor.
H. Diode Test
1. Connect the red test lead to +AVΩ terminal and the black test
lead to -COM terminal.
2. Select the rotary switch to one of positions: x1 (150mA), x10
(15mA), x100 (1,5mA), x1k(150µA) or x100k(1,5µA).
3. Make the zero adjustment in the selected range, as in Resistance
Measurement.
4. In the case of measuring a diode in a circuit, turn off the power
and discharge all capacitors before connecting the test leads.
5. Touch the black test lead in the diode anode and the red test lead
to the cathode to measure the direct current (If). Touch the black
test lead in the diode cathode and the red test lead in the anode
to measure the reverse current (Ir).
6. For a good diode there is a considerable change in the pointer for
direct current (LI scale) and a short change for reverse current (LI
scale).
7. The indicated value in LV scale during the measurement is the
direct voltage of diode for this test current.
Figure 3
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