Mastech M840D - Frequency Measurement; Temperature Measurement; Diode & Continuity Test

i
prmure.
Never
appty
voltage
to
the
"Cf
input
socket,
"
or
i
Carnage
may
result.
i
5.5
FREQUENCY
MMSURETT{ENT
.
I
1) $et the
function
range swttcfr
at
he
required
't{2"
position.
i
:
2)
Conned
test
leads
tr¡ measuring
pinb
and
ead üe
display
value.
:
i
Note:
Do
not apply
more
than
?50V
rms
trr
fre
input. lndicaüon
is
i
i
possible
a
voltage
nigf'er than
100V
mts, but
read¡f€
maybe
out of
i
I
;fmP**tuRE
MEA''REMENT
i
i
f
I
$*t the
function
range switcfr
atthe
-THMP'
position.
I
i
Zj
Be sure
the
polartty
of the
frermamuple,
p$
re
coH
sd
(ftee
end)
i
i
af the
tlnrmocou$e
sensor
into
the
temperature
testing
holes.
i
I
gl
Tl're
wurking end
{testing
end} on sr
inslde
the o$ed
beirg
te$ed
I
i
4)
The value
of fre
temperature
is
shown
on fre
display
in
degrees
i
i
'
mnügrade
("C),
¡
:
The testins
temp€rah.¡re
ls displayed
automatically
urten th*
i
thennqmuple
is
put
intrr
the
testing
holes.
The
sunounding
temperature
is
shown when he
cirsilt
of the
i
sensor
is
tx"¡t off.
:
The
limit temperature
measured
by the thermomupb
given
!
together
wtth
the
instrurnent
is
250"C; 300'C
is amptable
i
within
sho$
p*riod.
i
s.I
DIODE
&
CONIINUITY
TEST
I
tl $etthe
fundion
range swftch
atthe
"{F-!"
position.
i
Zl Conned
fre
black
test
lead to
"COM"
terminal
yd
fed
te$..lead
to
¡
i
'V/OHM"
inputtenninal;
{Note:
fre
polartfy
of the
red test
lead
is'+").
:
¡
3)
This
range wfth
'AUDIBLE
CONTINUIry
TE$T' tundion.
Built'in
i
i
'buzzer
sounds
if
the
resistance
betwmn two
probm
is less
tlran
i
:
L,,Ll¿'j.E¡
{
i as!10fi.
.
ar\JL
l
v¡¿.
I
¿l Connect
frá
test
leads acrCI$$
fre
diode
and
read the display
value.
ia
a
i
*o**tr)
Vrthen the
input
is not connected,
i.e.
at
opn circuit,
Ure
ngure i
b)
c)
"1"will
h displayed.
b)
Test
condition:
Foruard
SC
voltage
áFprox.
2.8V.
:
DC cunent
approx.lrrA.
Reversed
¡
'i
c)
The
meter
displays
the
fon¡rurd
voltage drop
and
displays
i
a*