HOBO
MX
CO
2
Data
Logger
(MX1102A)
Manual
1
‐
800
‐
LOGGERS
11
www.onsetcomp.com
Internal
Event
Name
Definition
logging
mode.
Automatic
Calibration
The
CO
2
sensor
has
been
calibrated
automatically;
the
data
file
will
show
the
offset
calculated
in
PPM
during
the
calibration.
Manual
Calibration
The
CO
2
sensor
has
been
manually
calibrated;
the
data
file
will
show
the
offset
calculated
in
PPM
during
the
calibration.
Safe
Shutdown
The
battery
level
dropped
below
3.7
V;
the
logger
performs
a
safe
shutdown.
Mounting
the
Logger
There
are
several
ways
to
mount
the
logger
using
the
materials
included:
Attach
Command
strips
to
the
back
of
the
logger
to
mount
it
to
a
wall
or
other
flat
surface.
Screw
in
the
brackets
onto
both
sides
of
the
logger
using
the
two
small
holes
labeled
in
the
diagram
below
and
then
use
tie
wraps
to
mount
it
to
a
pole
or
pipe.
Mount
the
logger
to
the
wall
or
a
flat
surface
using
two
screws
and
the
included
template.
The
dimensions
are
also
shown
in
the
following
example.
Protecting
the
Logger
The
logger
is
designed
for
indoor
use
and
can
be
permanently
damaged
by
corrosion
if
it
gets
wet.
Protect
it
from
condensation.
If
the
message
FAIL
CLK
appears
on
the
LCD
screen,
there
was
a
failure
with
the
internal
logger
clock
possibly
due
to
condensation.
Remove
the
battery
immediately
and
dry
the
circuit
board.
Note:
Static
electricity
may
cause
the
logger
to
stop
logging.
The
logger
has
been
tested
to
8
KV,
but
avoid
electrostatic
discharge
by
grounding
yourself
to
protect
the
logger.
For
more
information,
search
for
“static
discharge”
on
onsetcomp.com.
Battery
Information
The
logger
requires
four
user
‐
replaceable
AA
1.5
V
alkaline
or
optional
lithium
batteries
for
operation
at
the
extreme
ends
of
the
logger
operating
range.
Expected
battery
life
varies
based
on
the
ambient
temperature
where
the
logger
is
deployed,
the
logging
or
sampling
interval,
frequency
of
offloading
and
connection
to
a
mobile
device,
number
of
channels
that
are
active,
audible
alarms
duration,
use
of
burst
mode
or
statistics
logging,
and
battery
performance.
New
batteries
typically
last
6
months
with
logging
and
sampling
intervals
greater
than
5
minutes.
Deployments
in
extremely
cold
or
hot
temperatures,
or
a
logging
or
sampling
interval
faster
than
5
minutes
can
impact
battery
life.
Estimates
are
not
guaranteed
due
to
uncertainties
in
initial
battery
conditions
and
operating
environment.
The
logger
can
also
be
powered
by
the
USB
cable
if
faster
logging
intervals
are
desired
or
when
the
remaining
battery
voltage
is
too
low
for
it
to
continue
logging.
Connect
the
logger
to
the
computer,
click
the
Readout
button
on
the
toolbar
in
HOBOware,
and
save
the
data
as
prompted.
Replace
the
battery
before
launching
the
logger
again.
To
install
or
replace
the
batteries:
1.
Use
a
Phillips
‐
head
screwdriver
to
unscrew
the
battery
cover
on
the
back
of
the
logger.
2.
Remove
any
old
batteries.
3.
Insert
four
new
batteries
observing
polarity.
4.
Screw
the
battery
cover
back
in
place.
WARNING:
Do
not
cut
open,
incinerate,
heat
above
85°C
(185°F),
or
recharge
the
lithium
batteries.
The
batteries
may
explode
if
the
logger
is
exposed
to
extreme
heat
or
conditions
that
could
damage
or
destroy
the
battery
case.
Do
not
dispose
of
the
logger
or
batteries
in
fire.
Do
not
expose
the
contents
of
the
batteries
to
water.
Dispose
of
the
batteries
according
to
local
regulations
for
lithium
batteries.
Note:
CO
2
sensor
readings
may
temporarily
appear
as
0
ppm
in
HOBOmobile
when
replacing
the
batteries
until
the
logger
begins
logging
again.
9.53
cm
(3.75
inches)
Bracket
mounting
hole
Bracket
mounting
hole
Wall
mounting
hole
Wall
mounting
hole
Remove
this
screw
to
replace
the
batteries
