HOBO
MX2300
Series
Data
Logger
Manual
1
‐
800
‐
LOGGERS
3
www.onsetcomp.com
Logger
Components
and
Operation
Mounting
Holes:
Use
the
holes
at
the
top
and
bottom
of
the
logger
to
mount
it
(see
Deploying
and
Mounting
the
Logger
).
Alarm
LED:
This
LED
blinks
red
every
4
seconds
when
an
alarm
is
tripped
(unless
Show
LED
is
disabled
as
described
in
Configuring
the
Logger
).
Status
LED:
This
LED
blinks
blue
every
4
seconds
when
the
logger
is
logging
(unless
Show
LED
is
disabled
as
described
in
Configuring
the
Logger
).
If
the
logger
is
waiting
to
start
logging
because
it
was
configured
to
start
“On
Button
Push”
or
with
a
delayed
start,
it
will
blink
every
8
seconds.
Start
Button:
Press
this
button
to
wake
up
the
logger;
both
the
alarm
and
status
LEDs
will
blink.
Once
the
logger
is
awake,
press
this
button
to
move
it
to
the
top
of
the
devices
list
in
the
app.
Press
this
button
for
3
seconds
to
start
or
stop
the
logger
when
it
is
configured
to
start
or
stop
“On
button
push”
(see
Configuring
the
Logger
).
Both
LEDs
will
blink
four
times
when
you
press
the
button
to
start
or
stop
logging.
Press
this
button
for
10
seconds
to
reset
a
password
(see
Setting
a
Password
).
External
Sensor:
This
is
the
external
probe
attached
to
the
bottom
of
the
logger
that
measures
temperature
or
temperature/RH.
The
MX2302A
logger
has
one
external
sensor
that
measures
both
temperature
and
RH
and
the
MX2304
logger
has
one
sensor
that
measures
temperature
only.
The
MX2303
logger
(shown
at
left
above)
has
two
external
temperature
sensors;
the
left
sensor
is
channel
1
and
the
right
sensor
is
channel
2.
Vent:
The
RH
sensor
is
located
behind
the
vent
(MX2301A
model
only).
Downloading
the
App
and
Connecting
to
a
Logger
Install
the
app
to
connect
to
and
work
with
the
logger.
1.
If
you
are
using
an
iPhone®
or
iPad®:
Download
HOBOmobile
from
the
App
Store®.
If
you
are
using
an
Android
phone
or
tablet:
Download
HOBOconnect
from
Play™.
2.
Open
the
app
and
enable
Bluetooth
in
the
device
settings
if
prompted.
3.
Press
the
button
on
the
logger
to
wake
it
up.
4.
Tap
the
Devices
in
the
app.
(In
HOBOmobile,
tap
Loggers
at
the
top
of
the
screen.)
Tap
the
logger
in
the
app
to
connect
to
it.
If
the
logger
does
not
appear
or
if
it
is
having
trouble
connecting,
follow
these
tips:
Make
sure
the
logger
is
“awake”
by
pressing
the
start
button.
The
alarm
and
status
LEDs
will
blink
once
when
the
logger
wakes
up.
You
can
also
press
the
button
a
second
time
to
bring
it
to
the
top
of
the
list
if
you
are
working
with
multiple
loggers.
Make
sure
the
logger
is
within
range
of
your
mobile
device.
The
range
for
successful
wireless
communication
is
approximately
30.5
m
(100
ft)
with
full
line
‐
of
‐
sight.
If
there
are
several
loggers
in
the
area,
move
the
logger
to
a
location
with
fewer
loggers.
Interference
can
sometimes
occur
when
numerous
loggers
are
in
one
location.
If
your
device
can
connect
to
the
logger
intermittently
or
loses
its
connection,
move
closer
to
the
logger,
within
sight
if
possible.
If
the
logger
appears
in
the
app,
but
you
cannot
connect
to
it,
close
the
app
and
power
cycle
the
mobile
device.
This
forces
the
previous
Bluetooth
connection
to
close.
Once
connected
to
the
logger
you
can
select
one
of
the
following
actions:
Configure
in
HOBOmobile
or
in
HOBOconnect.
Select
logger
settings
and
load
them
onto
the
logger
to
start
logging.
See
Configuring
the
Logger
.
Readout
in
HOBOmobile
or
in
HOBOconnect.
Download
logger
data.
See
Reading
Out
the
Logger
.
Full
Status
Details
in
HOBOmobile
or
in
HOBOconnect.
Check
information
about
the
logger.
In
HOBOconnect,
access
some
of
the
actions
described
in
this
section.
Start
Logging
in
HOBOmobile
or
and
then
in
HOBOconnect.
Select
this
option
to
begin
logging
(if
the
logger
is
configured
to
start
“On
Button
Push”
as
described
in
Configuring
the
Logger
).
Stop
Logging
in
HOBOmobile
or
and
then
in
HOBOconnect.
Stop
the
logger
from
recording
data.
This
overrides
any
Stop
Logging
settings
described
in
Configuring
the
Logger
.
Page
Logger
LED
in
HOBOmobile
or
and
then
in
HOBOconnect.
Press
and
hold
this
option
to
illuminate
the
alarm
and
status
LEDs
for
4
seconds.
Logger
Password
in
HOBOmobile
or
and
then
in
HOBOconnect.
Select
this
to
create
a
password
for
the
logger
that
will
be
required
if
another
mobile
device
attempts
to
connect
to
it.
To
reset
a
password,
connect
to
the
logger,
tap
Set
Logger
Passkey,
and
select
Reset
to
Alarm
LED
Mounting
Holes
Start
Button
External
Sensor
Status
LED
MX2303
model
shown
Vent
MX2301A
model
shown