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Transistor Hfe Test - Mastech M840D Operation Manual

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figure
"1"
for
ovedmd
wlren
the
diode
is
reversed.
5.8
TRANSISTOR hFE
TEST
1)
$et
the
function range
switcfr to
Sre
"hFEu position.
2)
Make
$ure the
transistor
i$
"NPN"
or
"PNP"
type.
3)
Transistor
c*necily
insert in
E.B.S @nnector.
4)
Display reading
is
approx.
fansistor
hFH value.
Note;
Test
mndition:
B-ase
cunent approx,
10uA, Vss
approx.z.8v
I
I
a/
a
I
.t
6.F
1)
Battery
and fuse
replaoernent sfrould
only
h
done
after
the
test
i
leads have
been
disconnecffi
and power
is
off.
j
i
2l
Loosen $crfi^É
with
suihble
scre\ildriverand remove case
büom.
I
3)
The r¡eter
is power by a single
9v
batt*ry
{lEC
6F?J, NEDA 1604,
i
Jl$
0ü6F), $nap the battery mnnecürr leads to
fre
terminals of a
new i
battery
and
reinsert
the
battery into
the case top. Dress
fie
battery
!
leads
so
that
fiey
will not be
pinched
betr¡rreen
ffre
case
hottorn
and
i
case
top.
4)
The
meter
is
protected
fast tuse 0.5Atr50V
(mdel
M840D
proteded fuse
2A#5$V
onlyi, dirnensions
is
05?0mm.
5)
Replace
the
mse
bottom
and
reinshll üre three
$crevte.
operate
fie
rneter unless
the case bottom
is
fully
ds$ed.
AWARRAI{TYA
Warrants
this
instrument'to
be free
frorn defects
in
rnaterial
and workmanship
for a
period
of
one
year.
Any
instrument
found defective within one year
from
the
delivery
date-
and
returned
to
the factory
with
transportation
charges prepaid.
W¡ll
be
repaired,
adjusted,
or
replaced
at
no
charge
to
the
original
purchaser.
This warranty does
not cover expendable
items such
as
batteries
or
fuses,
lf
tl're
defect
has
been caused
by
a
rnisuse
ar
abnormal
operation
conditions,
the
repair
will be
billed at
a
nominal cost.

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