HOBO
MX
Soil
Moisture
(MX2306)
and
MX
Soil
Moisture
and
Temperature
(MX2307)
Data
Logger
Manual
1
‐
508
‐
759
‐
9500
(U.S.
and
International)
7
www.onsetcomp.com
1
‐
800
‐
LOGGERS
(U.S.
only)
Setting
a
Password
You
can
create
an
encrypted
password
for
the
logger
that
will
be
required
if
another
device
attempts
to
connect
to
it.
This
is
recommended
to
ensure
that
a
deployed
logger
is
not
mistakenly
stopped
or
purposely
altered
by
others.
This
password
uses
a
proprietary
encryption
algorithm
that
changes
with
every
connection.
To
set
a
password:
1.
Tap
Devices.
Press
the
button
on
the
logger
to
wake
it
up
(if
necessary).
Tap
the
logger
in
the
app
to
connect
to
it.
2.
Tap
(if
applicable)
and
then
.
3.
Type
a
password
and
then
tap
Set.
Only
the
device
used
to
set
the
password
can
then
connect
to
the
logger
without
entering
a
password;
all
other
devices
will
be
required
to
enter
the
password.
For
example,
if
you
set
the
password
for
the
logger
with
your
tablet
and
then
try
to
connect
to
the
logger
later
with
your
phone,
you
will
be
required
to
enter
the
password
on
the
phone
but
not
with
your
tablet.
Similarly,
if
others
attempt
to
connect
to
the
logger
with
different
devices,
they
would
also
be
required
to
enter
the
password.
To
reset
a
password,
press
the
button
on
the
logger
for
10
seconds
or
connect
to
the
logger
and
tap
(if
applicable),
then
,
and
tap
Reset.
Reading
Out
the
Logger
To
offload
data
from
the
logger:
1.
Tap
Devices.
Press
the
button
on
the
logger
to
wake
it
up
(if
necessary).
2.
Tap
the
logger
in
the
app
to
connect
to
it
and
tap
.
The
logger
will
read
out
the
data
to
the
phone,
tablet,
or
computer.
3.
Once
the
readout
is
complete,
tap
HOBO
Files
and
select
the
file
to
view
it.
Tap
(if
applicable)
and
tap
to
export
the
data.
Data
can
also
be
uploaded
automatically
to
HOBOlink,
Onset’s
web
‐
based
software,
via
the
app
or
the
MX
gateway.
For
details,
see
the
app
user’s
guide
and
see
the
HOBOlink
help
for
details
on
working
with
data
in
HOBOlink.
Logger
Events
The
logger
records
the
following
internal
events
to
track
logger
operation
and
status.
You
can
view
events
in
exported
files
or
plot
events
in
the
app.
To
plot
events,
tap
HOBO
Files
and
select
a
file
to
open.
Tap
(if
applicable)
and
then
tap
.
Select
the
events
you
want
to
plot
and
tap
OK.
Internal
Event
Name
Definition
Host
Connected
The
logger
was
connected
to
the
mobile
device.
Started
The
logger
started
logging.
Internal
Event
Name
Definition
Stopped
The
logger
stopped
logging.
Alarm
Tripped/Cleared
An
alarm
has
occurred
because
the
reading
was
outside
the
alarm
limits
or
back
within
range.
Note:
Although
the
reading
may
have
returned
to
a
normal
range
during
logging,
an
alarm
cleared
event
will
not
be
logged
if
the
logger
was
set
up
to
maintain
alarms
until
reconfigured.
New
Interval
The
logger
has
switched
to
logging
at
the
burst
logging
rate
or
back
to
the
normal
rate.
Safe
Shutdown
The
battery
level
dropped
below
a
safe
operating
voltage
and
the
logger
performed
a
safe
shutdown.
Installing
the
Soil
Moisture
Sensor
There
are
two
installation
methods
for
installing
the
soil
moisture
sensor:
borehole
or
trench.
Borehole
Installation
Method
This
method
allows
for
a
profile
of
soil
moisture
sensors
to
be
installed
at
different
depths
within
a
single
augered
borehole,
thereby
minimizing
soil
disturbance
at
the
measurement
site.
A
10
‐
cm
(4
‐
inch)
borehole
is
augered
vertically
at
the
measurement
location.
You
can
then
carefully
insert
and
place
the
sensor
by
hand
or
buy
or
rent
the
Borehole
Installation
Tool
from
Meter
(recommended
for
depths
greater
than
50
cm
(19.7
inches).
Meter
at
(North
America)
or
(Europe)
for
details
on
buying
or
renting
the
tool.
If
installing
the
sensor
without
the
Borehole
Installation
Tool,
look
down
the
hole
with
a
flashlight,
reach
in
with
the
sensor
and
push
it
into
to
the
side
of
the
undisturbed
soil.
Look
down
the
hole
again
and
make
sure
it
is
firmly
seated.
You
can
also
consider
attaching
the
sensor
to
PVC
piping
or
similar
material
to
aid
in
placing
the
sensor.
You
can
then
use
the
PVC
as
a
lever
to
assist
with
pushing
the
sensor
into
the
undisturbed
soil.
