MA44x
‐
en
‐
GB_V1.0
8/16
7
Operation
CAUTIONS
Read
and
understand
all
of
the
Safety
statements
listed
in
the
safety
section
of
this
manual
prior
to
use.
Powering
the
Meter
1.
Move
the
function
switch
to
any
position
to
power
the
meter.
Check
the
batteries
if
the
unit
fails
to
power
ON.
2.
Move
the
function
switch
to
the
OFF
position
to
remove
power
to
the
meter.
3.
The
meter
has
an
Auto
Power
OFF
feature
(APO)
where
the
meter
switches
OFF
after
30
minutes
(MA440)
or
15
minutes
(MA443/MA445)
of
inactivity.
The
MA443/MA445
models
emit
a
warning
tone
prior
to
automatically
switching
off.
Disable
Auto
Power
OFF
(MA443
and
MA445)
To
defeat
the
APO
feature:
1.
With
the
meter
OFF,
press
and
hold
the
M
(MODE)
button
and,
while
continuing
to
hold
the
M
button,
turn
the
rotary
switch
to
any
position.
2.
The
meter
will
beep
five
times
indicating
that
APO
has
been
deactivated.
3.
The
Auto
Power
OFF
function
will
now
be
disabled
until
the
next
cycle
of
power.
4.
When
APO
is
active,
the
APO
symbol
is
displayed.
When
APO
is
not
active,
the
APO
symbol
is
not
displayed.
