3
CO2
CALIBRATION
The
meter
is
calibrated
at
400
ppm
(parts
‐
per
‐
million)
CO2
concentration
at
the
factory.
400
ppm
is
comparable
to
fresh
outdoor
air.
There
are
2
types
of
calibration
available:
ABC
(Automatic
Baseline
Calibration)
or
manual
calibration.
One
or
the
other
should
be
used
regularly
to
maintain
good
accuracy.
Note:
If
TIM10
accuracy
becomes
a
concern
after
long
use
or
other
special
conditions,
return
the
meter
to
the
dealer
for
calibration.
CAUTION:
Do
not
calibrate
the
meter
with
air
or
bottled
gas
that
contains
an
unknown
CO2
level.
The
meter
will
assume
it
is
400
ppm
CO2
and
will
give
inaccurate
measurements.
ABC
Calibration
ABC
(Automatic
Baseline
Calibration)
is
designed
to
eliminate
the
zero
drift
over
time
of
the
infrared
CO2
sensor.
The
ABC
function
is
enabled
by
default
from
the
factory.
For
ABC
to
work
properly,
the
meter
must
continuously
monitor
CO2
levels
for
at
least
7.5
days
(power
on).
During
that
time,
it
will
record
the
lowest
CO2
level
and
set
that
as
the
400
ppm
baseline
for
future
readings.
Therefore,
it
is
critical
when
using
ABC
calibration
that
the
meter
be
exposed
to
fresh
air
at
least
once
every
7.5
days.
If
this
is
not
possible,
then
manual
calibration
is
recommended.
Manual
Calibration
Manual
calibration
requires
fresh,
dry
outdoor
air
when
CO2
levels
are
approximately
400
ppm.
Do
not
calibrate
during
rainy
days.
High
humidity
will
affect
the
CO2
levels
in
air.
During
manual
calibration,
avoid
placing
the
meter
in
areas
crowded
with
people
or
close
to
structures
that
might
give
off
CO2
like
air
ventilation
pipes,
chimneys,
or
automobiles.
To
manually
calibrate
the
meter,
place
it
outdoors,
and
turn
it
on
for
at
least
2
minutes.
Then
hold
down
“
SET
“
,"
▲
"
and
“
MIN/MAX
▼
”
simultaneously
more
than
1
second
to
enter
CO2
calibration
mode
(Fig.19).
400
ppm
and
“CO2”
will
blink
during
calibration.
Wait
about
30
minutes
until
the
blinking
stops.
Calibration
is
completed
automatically.
To
stop
manual
calibration,
press
“
RESET
“
for
at
least
1
second.
Note:
Keep
the
meter
away
from
any
animals,
humans
or
plants
which
might
affect
the
CO2
concentration
nearby
during
the
calibration.
RH
CALIBRATION
This
humidity
accuracy
of
this
desktop
CO2
meter
can
be
re
‐
calibrated.
Contact
CO2Meter.com
to
purchase
a
calibration
kit
with
instructions.
SPECIFICATIONS
TROUBLESHOOTING
?
Cannot
power
on
Check
whether
the
adaptor
has
power
and
that
the
meter
is
firmly
plugged
in.
?
Slow
response
Check
that
the
air
flow
channels
on
the
rear
of
the
meter
are
not
blocked.
?
No
change
in
readings
Check
whether
the
meter
is
in
maximum
or
minimum
mode.
Reset
factory
defaults.
?
"BAt”
and
green
LED
keep
flashing
The
adaptor
output
voltage
is
too
high
or
too
low.
Use
the
supplied
adaptor
with
correct
5V
(+10%)
>=0.5A
ratings.
?
Error
Codes
