HOBO
MX
Soil
Moisture
(MX2306)
and
MX
Soil
Moisture
and
Temperature
(MX2307)
Data
Logger
Manual
1
‐
508
‐
759
‐
9500
(U.S.
and
International)
6
www.onsetcomp.com
1
‐
800
‐
LOGGERS
(U.S.
only)
To
set
up
burst
logging:
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
Logging
Mode
and
then
tap
Burst
Logging.
4.
Select
Low
and/or
High
and
either
type
or
drag
the
slider
to
set
the
low
and/or
high
values.
5.
Repeat
step
4
for
the
other
sensor
if
desired.
6.
Set
the
burst
logging
interval,
which
must
be
faster
than
the
logging
interval.
Keep
in
mind
that
the
faster
the
burst
logging
rate,
the
greater
the
impact
on
battery
life
and
the
shorter
the
logging
duration.
Because
measurements
are
being
taken
at
the
burst
logging
interval
throughout
the
deployment,
the
battery
usage
is
similar
to
what
it
would
be
if
you
had
selected
this
rate
for
the
normal
logging
interval.
7.
Tap
Save.
Notes:
The
high
and
low
burst
limits
are
checked
at
the
burst
logging
interval
rate
whether
the
logger
is
in
normal
or
burst
condition.
For
example,
if
the
logging
interval
is
set
to
1
hour
and
the
burst
logging
interval
is
set
to
10
minutes,
the
logger
will
always
check
for
burst
limits
every
10
minutes.
If
high
and/or
low
limits
have
been
configured
for
more
than
one
sensor,
burst
logging
will
begin
when
any
high
or
low
condition
goes
out
of
range.
Burst
logging
will
not
end
until
all
conditions
on
all
sensors
are
back
within
normal
range.
The
actual
values
for
the
burst
logging
limits
are
set
to
the
closest
value
supported
by
the
logger.
Burst
logging
can
begin
or
end
when
the
sensor
reading
is
within
the
resolution
specifications.
This
means
the
value
that
triggers
burst
logging
may
differ
slightly
than
the
value
entered.
Once
the
high
or
low
condition
clears,
the
logging
interval
time
will
be
calculated
using
the
last
recorded
data
point
in
burst
logging
mode,
not
the
last
data
point
recorded
at
the
normal
logging
rate.
For
example,
the
logger
has
a
10
‐
minute
logging
interval
and
logged
a
data
point
at
9:05.
Then,
the
high
limit
was
surpassed
and
burst
logging
began
at
9:06.
Burst
logging
then
continued
until
9:12
when
the
sensor
reading
fell
back
below
the
high
limit.
Now
back
in
normal
mode,
the
next
logging
interval
will
be
10
minutes
from
the
last
burst
logging
point,
or
9:22
in
this
case.
If
burst
logging
had
not
occurred,
the
next
data
point
would
have
been
at
9:15.
A
New
Interval
event
is
created
each
time
the
logger
enters
or
exits
burst
logging
mode.
See
Logger
Events
for
details
on
plotting
and
viewing
the
event.
In
addition,
if
the
logger
is
stopped
with
a
button
push
while
in
burst
logging
mode,
a
New
Interval
event
is
automatically
logged
and
the
burst
condition
is
cleared,
even
if
the
actual
high
or
low
condition
has
not
cleared.
Statistics
Logging
During
fixed
logging,
the
logger
records
data
for
enabled
sensors
and/or
selected
statistics
at
the
logging
interval
selected.
Statistics
are
calculated
at
a
sampling
rate
you
specify
with
the
results
for
the
sampling
period
recorded
at
each
logging
interval.
The
following
statistics
can
be
logged
for
each
sensor:
The
maximum,
or
highest,
sampled
value
The
minimum,
or
lowest,
sampled
value
An
average
of
all
sampled
values
The
standard
deviation
from
the
average
for
all
sampled
values.
For
example,
an
MX2307
logger
is
configured
with
both
the
soil
moisture
and
temperature
sensors
enabled,
and
the
logging
interval
is
set
to
5
minutes.
The
logging
mode
is
set
to
fixed
logging
with
Normal
and
all
four
statistics
enabled
and
with
a
statistics
sampling
interval
of
30
seconds.
Once
logging
begins,
the
logger
will
measure
and
record
the
actual
soil
moisture
and
temperature
sensor
values
every
5
minutes.
In
addition,
the
logger
will
take
a
soil
moisture
and
temperature
sample
every
30
seconds
and
temporarily
store
them
in
memory.
The
logger
will
then
calculate
the
maximum,
minimum,
average,
and
standard
deviation
using
the
samples
gathered
over
the
previous
5
‐
minute
period
and
log
the
resulting
values.
When
reading
out
the
logger,
this
would
result
in
10
data
series:
two
sensor
series
(with
soil
moisture
and
temperature
logged
every
5
minutes)
plus
eight
maximum,
minimum,
average,
and
standard
deviation
series
(four
for
soil
moisture
and
four
for
temperature
with
values
calculated
and
logged
every
5
minutes
based
on
the
30
‐
second
sampling).
To
log
statistics:
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
Logging
Mode
and
then
select
Fixed
Logging.
4.
Select
Normal
to
record
the
current
reading
for
each
enabled
sensor
at
the
logging
interval
shown
at
the
top
of
the
screen.
Do
not
select
this
if
you
only
want
to
log
statistics.
5.
Select
the
statistics
you
want
the
logger
to
record
at
each
logging
interval:
Maximum,
Minimum,
Average,
and
Standard
Deviation
(average
is
automatically
enabled
when
selecting
Standard
Deviation).
Statistics
will
be
logged
for
all
enabled
sensors.
In
addition,
the
more
statistics
you
record,
the
shorter
the
logger
duration
and
the
more
memory
is
required.
6.
Tap
Statistics
Sampling
Interval
and
select
the
rate
to
use
for
calculating
statistics.
The
rate
must
be
less
than,
and
a
factor
of,
the
logging
interval.
For
example,
if
the
logging
interval
is
1
minute
and
5
seconds
was
selected
for
the
sampling
rate,
the
logger
will
take
12
sample
readings
between
each
logging
interval
(one
sample
every
5
seconds
for
a
minute)
and
use
the
12
samples
to
record
the
resulting
statistics
at
each
1
‐
minute
logging
interval.
Note
that
the
faster
the
sampling
rate,
the
greater
the
impact
on
battery
life.
Because
measurements
are
being
taken
at
the
statistics
sampling
interval
throughout
the
deployment,
the
battery
usage
is
similar
to
what
it
would
be
if
you
had
selected
this
rate
for
the
normal
logging
interval.
7.
Tap
Save.
