HOBO
MX
Soil
Moisture
(MX2306)
and
MX
Soil
Moisture
and
Temperature
(MX2307)
Data
Logger
Manual
1
‐
508
‐
759
‐
9500
(U.S.
and
International)
5
www.onsetcomp.com
1
‐
800
‐
LOGGERS
(U.S.
only)
logger
is
pressed
to
wake
it
up,
thereby
preserving
as
much
battery
power
as
possible.
12.
Select
Soil
Type:
Mineral
–
for
common
soils,
with
EC
values
up
to
8
dS/m.
Soilless
–
for
potting
soils,
perlite,
and
peat
moss
with
EC
values
up
to
8
dS/m.
Apparent
Dielectric
Permittivity
–
raw
measurements
that
can
be
used
in
published
equations
such
as
the
Topp
equation
to
derive
soil
moisture
data.
13.
Enable
or
disable
Percent
of
Field
Capacity
–
To
see
soil
moisture
as
the
percent
of
field
capacity,
enable
this
and
enter
the
field
capacity
for
the
soil
at
the
site
in
Volumetric
Water
Content
on
a
scale
of
0.01
to
1.00.
Note
that
the
Percent
of
Field
Capacity
values
reported
will
be
limited
to
the
range
of
0%
to
200%.
If
you
selected
Apparent
Dielectric
Permittivity
as
your
soil
type,
the
option
for
Percent
of
Field
Capacity
is
disabled.
14.
Select
whether
to
upload
data
via
the
HOBOconnect
app
or
the
MX
Gateway.
Using
the
MX
Gateway
requires
a
HOBOlink
account.
15.
Enable/Disable
the
sensors
that
will
be
logged
(MX2307
model)
and
set
up
any
alarms
to
trip
when
a
sensor
reading
rises
above
or
falls
below
a
specified
value.
See
Setting
up
Alarms
for
details
on
enabling
sensor
alarms.
Note
that
for
the
MX2307,
temperature
is
shown
as
channel
3.
This
is
because
channel
2
is
reserved
for
Apparent
Dielectric
Permittivity,
if
that
is
selected.
16.
Tap
to
save
the
configuration
settings,
and
start
logging
based
on
the
settings
you
selected.
Press
the
start
button
on
the
logger
if
it
was
set
up
to
start
logging
with
a
button
push.
See
Deploying
and
Mounting
the
Logger
for
details
on
mounting
and
see
Reading
Out
the
Logger
for
details
on
downloading.
Setting
up
Alarms
You
can
set
up
alarms
for
the
logger
so
that
if
a
sensor
reading
rises
above
or
falls
below
a
specified
value,
the
logger
alarm
LED
will
blink
and
an
alarm
icon
will
appear
in
the
app.
This
can
alert
you
to
problems
so
you
can
take
corrective
action.
To
set
an
alarm:
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
.
3.
Tap
a
sensor
(tap
the
Enable
Logging
toggle
if
necessary).
4.
Select
High
if
you
want
an
alarm
to
trip
when
the
sensor
reading
rises
above
the
high
alarm
value.
Drag
the
slider
or
type
a
value
to
set
the
high
alarm
value.
5.
Select
Low
if
you
want
an
alarm
to
trip
when
the
sensor
reading
falls
below
the
low
alarm
value.
Drag
the
slider
or
type
a
value
to
set
the
low
alarm
value.
6.
For
the
Duration,
select
how
much
time
should
elapse
before
the
alarm
trips,
and
select
one
of
the
following:
Cumulative.
The
alarm
will
trip
once
the
sensor
reading
is
out
of
the
acceptable
range
for
the
selected
duration
any
time
during
logging.
For
example,
if
the
low
alarm
is
set
to
0.05
m³/m³
for
a
soil
moisture
alarm
and
the
duration
is
set
to
30
minutes,
the
alarm
will
trip
once
the
sensor
readings
have
been
below
0.05
m³/m
for
a
total
of
30
minutes
since
the
logger
was
started.
Consecutive.
The
alarm
will
trip
once
the
sensor
reading
is
out
of
the
acceptable
range
continuously
for
the
selected
duration.
For
example,
if
the
low
alarm
is
set
to
0.05
m³/m³
for
a
soil
moisture
alarm
and
the
duration
is
set
to
30
minutes,
the
alarm
will
only
trip
if
all
sensor
readings
have
been
below
0.05
m³/m
for
a
continuous
30
‐
minute
period.
7.
Tap
Save.
For
MX2307
models,
repeat
steps
3–7
for
the
other
sensor
if
desired.
8.
In
the
configuration
settings,
select
one
of
the
following
options
to
determine
how
the
alarm
indications
are
cleared:
Logger
Reconfigured.
The
alarm
icon
indication
will
display
until
the
next
time
the
logger
is
reconfigured.
Sensor
in
Limits.
The
alarm
icon
indication
will
display
until
the
sensor
reading
returns
to
the
normal
range
between
any
configured
high
and
low
alarm
limits.
When
an
alarm
trips,
the
logger
alarm
LED
blinks
every
4
seconds
(unless
Show
LED
is
disabled),
an
alarm
icon
appears
in
the
app,
and
an
Alarm
Tripped
event
is
logged.
The
alarm
state
will
clear
when
the
readings
return
to
normal
if
Sensor
in
Limits
was
selected
in
step
8.
Otherwise,
the
alarm
state
will
remain
in
place
until
the
logger
is
reconfigured.
Notes:
Alarm
limits
are
checked
at
every
logging
interval.
For
example,
if
the
logging
interval
is
set
to
5
minutes,
the
logger
will
check
the
sensor
readings
against
the
configured
high
and
low
alarm
setting
every
5
minutes.
The
actual
values
for
the
high
and
low
alarm
limits
are
set
to
the
closest
value
supported
by
the
logger.
In
addition,
alarms
can
trip
or
clear
when
the
sensor
reading
is
within
the
resolution
specifications.
When
reading
out
the
logger,
alarm
events
can
be
displayed
on
the
plot
or
in
the
data
file.
See
Logger
Events
.
Burst
Logging
Burst
logging
is
a
logging
mode
that
allows
you
to
set
up
more
frequent
logging
when
a
specified
condition
is
met.
For
example,
an
MX2307
logger
is
recording
data
at
a
5
‐
minute
logging
interval
and
burst
logging
is
configured
to
log
every
30
seconds
when
the
temperature
rises
above
85°F
(the
high
limit)
or
falls
below
32°F
(the
low
limit).
This
means
the
logger
will
record
data
every
5
minutes
as
long
as
the
temperature
remains
between
85°F
and
32°F.
Once
the
temperature
rises
above
85°F,
the
logger
will
switch
to
the
faster
logging
rate
and
record
data
every
30
seconds
until
the
temperature
falls
back
to
85°F.
At
that
time,
logging
resumes
every
5
minutes
at
the
normal
logging
interval.
Similarly,
if
the
temperature
falls
below
32°F,
the
logger
would
switch
to
burst
logging
mode
again
and
record
data
every
30
seconds.
Once
the
temperature
rises
back
to
32°F,
the
logger
will
return
to
normal
mode,
logging
every
5
minutes.
Note:
Sensor
alarms,
statistics,
and
the
Stop
Logging
option
“Wrap
When
Full”
are
not
available
in
burst
logging
mode.
