EXTECH
INSTRUMENTS
4
SDL900
‐
en
‐
GB_V1.4
5/15
Operation
AC/DC
Magnetic
Field
Measurement
Switch
the
meter
ON
by
pressing
and
holding
the
POWER
button
for
at
least
two
seconds.
Press
and
hold
the
FUNCTION
button
to
select
either
DC
or
AC
magnetic
field
measurement.
Press
and
hold
the
RANGE
button
until
the
desired
range
(1
or
2)
is
selected.
Select
the
desired
unit
of
measure
(mT
or
G).
For
DC
magnetic
field
measurements,
the
display
will
show
either
the
N
or
S
indicator.
For
the
North
Pole,
the
N
indicator
will
be
shown.
Similarly,
for
the
South
Pole,
the
S
indicator
will
be
shown.
For
AC
magnetic
field
measurements,
the
display
will
show
the
AC
indicator.
The
display
will
not
show
the
N
or
S
indicator.
Contact
and
press
the
testing
material
to
the
probe
head
(see
Fig
1).
The
display
will
show
the
magnetic
field
value
along
with
the
measurement
unit
(mT
or
G).
Figure
1
Note
:
When
the
meter
is
powered
ON,
the
display
may
show
a
non
‐
zero
value;
this
is
because
of
environmental
interference.
Before
taking
a
measurement,
set
the
probe
at
the
optimum
position.
To
Zero
the
display,
press
and
hold
the
▲
and
▼
buttons
until
the
display
shows
the
“
0
”
value
and
the
display
flashes
the
ZERO
indicator.
The
meter
is
now
zeroed.
Data
Hold
During
the
measurements,
press
the
HOLD
button
to
freeze
a
displayed
reading.
The
measured
value
will
be
held
and
the
LCD
will
display
the
HOLD
symbol.
Press
the
HOLD
button
again
to
release
the
data
hold
function.
