Extech
Instruments
25 GX900-EU-EN V1.6 4/14
FUNCTIONS
AND
FEATURES
FUNCTION
MENU
BASICS
Each
primary
measurement
function
(selected
by
rotary
dial
position)
has
a
number
of
optional
sub
‐
functions
or
modes
accessed
by
pressing
the
F1
key
(MENU).
A
typical
menu
is
shown
here.
Menu
selection
is
indicated
by
the
dark
colored
square
(designated
as
the
‘menu
selector’
in
this
Instruction
Manual)
to
the
left
of
the
menu
item.
Use
the
four
front
panel
cursor
buttons
(left,
right,
up,
and
down)
to
position
the
menu
selector
next
to
a
menu
item.
As
the
menu
selector
moves
between
menu
items,
the
four
F
keys
and
OK
key
change
to
reflect
the
available
functions
and/or
modes
available
for
the
selection
menu
item.
THE
‘HELP’
UTILITY
While
operating
the
meter,
additional
information
regarding
a
selected
function,
a
front
‐
panel
button,
or
a
menu
may
be
needed.
Press
the
INFO
key
to
open
an
information
window
that
lists
topics
covering
the
functions
and
modifiers
that
are
available
at
the
time
the
button
is
pressed.
Each
topic
provides
a
brief
explanation
on
a
meter
function
or
feature.
The
number
of
informational
topics
displayed
at
any
one
time
may
exceed
the
display
area.
Use
the
keys
labeled
NEXT
and
PREV
to
move
from
topic
to
topic.
Use
the
key
labeled
MORE,
UP,
and
DOWN
to
scroll
through
the
information
a
full
screen
at
a
time.
