EXTECH
INSTRUMENTS
7
SDL900
‐
en
‐
GB_V1.4
5/15
Datalogger
Mode
Preparation
for
the
Datalogger
Function
Insert
the
SD
card
into
the
SD
card
socket.
If
the
SD
card
has
never
been
used
with
the
SDL900,
please
format
it
(see
the
section
titled
“
SD
Memory
Card
Format
”
in
the
Set
Mode
above).
Note:
It
is
strongly
recommended
that
memory
cards
be
formatted
by
the
SDL900.
If
the
SD
card
has
problems
use
a
computer
to
reformat
the
SD
card
and
try
again.
If
this
is
the
first
time
the
meter
is
being
used,
set
the
Date
and
Time
(see
the
section
“
Set
the
Clock
Time
and
Date”
in
the
Set
Mode
above).
Automatic
Datalogging
1.
Select
the
sampling
time
(rate)
as
described
in
the
Set
Mode
section
above
to
a
value
other
than
zero.
2.
Press
and
hold
the
LOG
button
for
2
seconds.
The
meter
will
flash
the
DATALOGGER
icon
at
the
selected
sampling
rate,
indicating
that
readings
are
now
being
automatically
recorded
to
the
SD
card.
3.
If
a
card
is
not
inserted
or
if
the
card
is
defective,
the
meter
will
display
‘EMPTY’
and
exit
the
DATALOGGER
mode.
In
this
case,
switch
the
meter
OFF
and
try
again
with
a
valid
SD
card.
4.
Pause
the
datalogger
by
pressing
the
LOG
button
momentarily.
The
DATALOGGER
icon
will
stop
flashing
and
the
sample
rate
will
display
for
a
short
time.
To
resume
logging
simply
press
the
LOG
button
again.
5.
To
terminate
the
datalogging
session
press
and
hold
the
LOG
button
for
at
least
2
seconds.
6.
When
an
SD
card
is
used
for
the
first
time
a
folder
is
created
on
the
card
and
named
MGA01
.
Up
to
99
spreadsheet
documents
(each
with
30,000
readings)
can
be
stored
in
this
folder.
7.
When
datalogging
begins,
a
new
spreadsheet
document
named
MGA01001.xls
is
created
on
the
SD
card
in
the
MGA01
folder.
The
data
recorded
will
be
placed
in
the
MGA01001.xls
document
until
30,000
readings
are
reached.
8.
If
the
measurement
session
exceeds
30,000
readings,
a
new
document
will
be
created
(MGA01002.xls)
where
another
30,000
readings
can
be
stored.
This
method
continues
for
up
to
99
documents,
after
which
another
folder
is
created
(MGA02)
where
another
99
spreadsheet
documents
can
be
stored.
This
process
continues
in
this
same
fashion
with
folders
MGA03
through
MGA10
(last
allowable
folder).
