EXTECH
INSTRUMENTS
EX850-en-GB_v2.4 7/16
3
CAUTIONS
Improper
use
of
this
meter
can
cause
damage,
shock,
injury
or
death.
Read
and
understand
this
user
manual
before
operating
the
meter.
Always
remove
the
test
leads
before
replacing
the
battery
or
fuses.
Inspect
the
condition
of
the
test
leads
and
the
meter
itself
for
any
damage
before
operating
the
meter.
Repair
or
replace
any
damage
before
use.
Use
great
care
when
making
measurements
if
the
voltages
are
greater
than
25VAC
rms
or
35VDC.
These
voltages
are
considered
a
shock
hazard.
Always
discharge
capacitors
and
remove
power
from
the
device
under
test
before
performing
Diode,
Resistance
or
Continuity
tests.
Voltage
checks
on
electrical
outlets
can
be
difficult
and
misleading
because
of
the
uncertainty
of
connection
to
the
recessed
electrical
contacts.
Other
means
should
be
used
to
ensure
that
the
terminals
are
not
"live".
If
the
equipment
is
used
in
a
manner
not
specified
by
the
manufacturer,
the
protection
provided
by
the
equipment
may
be
impaired.
This
device
is
not
a
toy
and
must
not
reach
children’s
hands.
It
contains
hazardous
objects
as
well
as
small
parts
that
the
children
could
swallow.
In
case
a
child
swallows
any
of
them,
please
contact
a
physician
immediately
Do
not
leave
batteries
and
packing
material
lying
around
unattended;
they
can
be
dangerous
for
children
if
they
use
them
as
toys
In
case
the
device
is
going
to
be
unused
for
an
extended
period
of
time,
remove
the
batteries
to
prevent
them
from
draining
Expired
or
damaged
batteries
can
cause
cauterization
on
contact
with
the
skin.
Always,
therefore,
use
suitable
hand
gloves
in
such
cases
See
that
the
batteries
are
not
short
‐
circuited.
Do
not
throw
batteries
into
the
fire.
Do
not
directly
view
or
direct
the
laser
pointer
at
an
eye.
Low
power
visible
lasers
do
not
normally
present
a
hazard,
but
may
present
some
potential
for
hazard
if
viewed
directly
for
extended
periods
of
time
