UNI-T UT15B PRO - Page 9

UT
15
B
PRO
/
UT
17
B
/
UT
18
B
PRO
User Manual UT
15
B
PRO
/
UT
17
B
/
UT
18
B
PRO
User Manual
2
.
DC
Voltage
Measurement
(
Figure
4
)
1
)
Turn the
function
selection knob
to
the
DC
voltage
scale
.
2
)
Insert the red
test
lead
to
V
port
and the black
one
to
the
COM
port
,
and
connect
the
tips
of
two
test
leads
to
both
ends
of
measuring voltage separately
(
with
the load
in
parallel
)
to
measure
.
3
)
The
input
resistance
of DC
voltage
is
infinity (
>
3
GQ
)
.
No attenuation when
measuring
weak
signal
with
high
precision
.
Some
digits
will
show
in
open
circuit
,
which
is normal without
measurement
affecting
.
4
)
Operation
of
frequency
measurement
in
voltage
scale
(
UT
17
B
PRO
)
:
press
the
Hz
%
button
to enter
the
frequency
measurement
mode
,
with
the
range
of
10
Hz
~
100
kHz
.
3
.
Resistance and
Circuit
Continuity
Measurement
(
Figure
5
a
)
1
)
Turn the
function
selection knob
to
the resistance scale
.
2
)
Insert the red
test
leads
to
the
Q
port
and the black
one
to
the
COM
port
,
and
connect
the
tips
of
two test
leads
to
both ends
of
measuring
resistance
separately
(
with
the load
in
parallel
)
to
measure
.
v
—
O
f
K
^
:
=
=
TJMW
’
A
A
Si
A
|
HOIP
|
0
I
«
-
TwRUS
mocornm
|
j
00
SSI
3000
True
RMS
8000
Count
*
JOEI
^
0.5
Q
OK
>
7
%
OL
pAmA
*
9
OK
*
1
M
-
B
-
r
-
OL
A
^
Warning
:
•
It
is
forbidden
to
input
voltage higher
than
1000
Vrms
.
Damage
may
occur
though
it
is
possible
to
measure
higher voltage
.
•
Use caution
to
avoid electric shock when
working
with
high voltages
.
•
Before
each
use
,
verify
tester
operation
by measuring
a
known
voltage
.
Ai
.
Warning
:
^ ^
•
OL
symbol
will
be
displayed
when the measured resistance is
open
-
circuit
or
the resistance exceeds the
maximum
range
of
meter
.
•
Before
online resistance
measuring
operation
,
please
switch
off
all
powers
in
circuit and
fully
discharge
all
capacitors
to
avoid
inaccuracy
.
Figure
4
16
15