Velleman DVM850BL Bedienungsanleitung Seite 8

6 6.3. AC VOLTAG GE MEA
1. Connect 1 t the red te est lead to
2. Set the r 2 rotary swi itch in the
3. Connect 3 t the test l eads to th
4. Read th 4 e voltage value on t
6 6.4. RES SISTAN CE
1. Connect 1 t the red te est lead to
(the red lead has a a positive
2. Set the r 2 rotary swi itch in the
3. Connect 3 t the test l eads to th
4. If the re 4 esistance b being meas
all capac citors befo ore applyi
6 6.5. DIO ODE TES ST
1 1. Connect t the red te est lead to
lead has s a positive e polarity
2 2. Set the r rotary swi itch in the
3 3. Connect t the red te est lead to
the cath hode of the e diode. Th
If the co onnection is reverse
6.6. TRA 6 ANSISTO OR TES
1. Set the r 1 rotary swi itch in the
2. Determi 2 ine whethe er the tran
and coll lector lead ds. Insert t
panel.
3. Read th 3 e approxim mate hFE-
current o of 10µA a and Vce 3V
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ASUREM MENT
o the "VΩm mA" jack
appropria ate ACV p
e source t o be meas
the LCD d display.
o the "VΩm mA" jack
polarity " "+").
appropria ate "Ω" ran
e resistor to be mea
sured is co onnected t
ing the tes st probes.
o "VΩmA" " jack and
"+".).
" " pos sition.
o the anode e of the di
he approx x. forward
ed, the disp play will m
ST
"hFE" po osition.
nsistor und der testing
the leads in nto the pro
-value obt tained und
V.
and the bl lack test le ead to the
position.
sured.
and the bl lack test le ead to the
nge positi on.
asured and d read the L LCD disp
to a circui it, turn off f the powe
d the black k one to th he "COM"
iode to be tested and d the black
voltage dr rop of the diode wil
merely sho ow a "1".
g is NPN o or PNP and d locate th
oper holes s of the hF FE-socket
der the foll lowing tes st conditio
"COM" j ack.
"COM" j ack
play.
er and disc charge
jack (the red
k test lead d to
ll be displ ayed.
he emitter , base
on the fro ont
ons : a bas se