Extech
Instruments
14 GX900-EU-EN V1.6 4/14
MEASUREMENTS
WARNING
:
Risk
of
electrocution.
High
‐
voltage
circuits,
both
AC
and
DC,
are
very
dangerous
and
should
be
measured
with
great
care.
1.
ALWAYS
turn
the
function
switch
to
the
OFF
position
when
the
meter
is
not
in
use.
2.
If
OL
appears
in
the
display
during
a
measurement,
the
value
exceeds
the
selected
range.
Change
to
a
higher
range
or
use
the
Auto
range
mode.
DC
VOLTAGE
MEASUREMENTS
CAUTION:
Do
not
measure
DC
voltages
if
a
motor
on
the
circuit
is
being
switched
ON
or
OFF.
Large
voltage
surges
may
occur
that
can
damage
the
meter.
1.
Set
the
function
switch
to
the
V
‐
position.
2.
Insert
the
black
test
lead
banana
plug
into
the
negative
COM
jack.
Insert
the
red
test
lead
banana
plug
into
the
positive
V
jack.
3.
Touch
the
black
test
probe
tip
to
the
negative
side
of
the
circuit.
4.
Touch
the
red
test
probe
tip
to
the
positive
side
of
the
circuit.
5.
Read
the
voltage
in
the
display.
