Wavetek Meterman 220 Manuel D'utilisation page 19

test leads as shown in figure 7. ❷ Set the Function/range switch to
Apply probe tip of red lead to the anode and of black lead to the cathode of the
diode. ❹ The meter's display indicates the forward voltage drop (approx. 0.6V for
silicon diode or 0.4V for germanium diode). An open diode is indicated by "I OL".
š Reverse test lead connections to the diode to perform a reverse bias test. "I OL"
indicates a good diode. Notes: "I OL" for both reverse and forward bias tests
indicates an open diode. A low voltage reading for both bias tests indicates a
shorted diode. If the diode is shunted by a resistor of 1000 ohms or less, it must
be removed from the circuit before taking the measurement. Bipolar transistor
junctions may be tested in the same manner described above as emitter-base and
base-collector junctions are diode junctions.
When measuring continuity (also for shorted diodes) the meter emits a
continuous tone when the resistance value falls below 50Ω.
4
DC
MIN MAX
A
V
V
OFF
mA
FUSED
MAX
430mA
10A
10A MAX
Fig. 7
V
220
REL RANGE
HOLD
SLEEP
MEM
OFF
LOGIC
430 u A
43
mA
430
mA
2
10A
COM V
CAT II1000V
CAT III 600V
1000V
FUSED MAX
750V
1
550 - 900mV
good/gut/bien/bon
bad/schlecht/mal/
DC
Reverse Bias Test
5
DC
Anode
Anode
red
rot
roja
rouge
- 17 -
V
V
mauvais
bad/schlecht/
<1V
mal/mauvais
good/gut/
bien/bon
Cathode
red
rot
roja
rouge
Cathode
3
. ❸
Hz