Sampling Data Logger User Manual
CO2Meter
PAGE
8
of
16
These
meters
feature
a
4
‐
20mA
linearly
scaled
output
that
matches
the
current
CO2
concentration
reading
proportionally.
In
addition,
it
has
a
digital
RS
‐
485
interface
for
connection
to
a
MODBUS
network
and
one
relay
with
1A
@
30VDC
for
an
external
controller.
Setup
Our
sampling
device
will
require
minimal
setup
since
it
is
designed
to
be
portable.
The
most
important
aspect
of
the
setup
involves
connecting
the
sampling
hoses
and
ensuring
proper
environmental
setup.
Figure
above
shows
the
labeled
components
of
the
unit,
as
referenced
throughout
the
rest
of
this
manual.
Data
Logging
Configuration
These
meters
feature
an
internal
memory
capable
storing
data
when
not
attached
to
a
personal
computer.
These
units
will
allow
you
to
simultaneously
read
and
store
CO2
concentration
level
data.
Due
to
the
nature
of
their
design,
these
units
should
be
connected
to
your
personal
computer
first,
before
operation,
to
initialize
and
set
the
logging
period,
and
real
‐
time
clock.
0
‐
1%,
5%,
30%,
65%,
100%
CO2
Sampling
Data
Loggers
Make
sure
the
unit
is
powered
with
24VDC
using
the
RS
‐
485
cable
included.
In
order
to
initialize
data
logging
functionality,
the
unit
MUST
be
connected
to
the
computer
with
data
logging
switched
to
off
,
and
the
GasLab®
software
started.
Once
the
unit
has
been
connected,
click
on
the
“Configure
Sensor”
button
in
the
GasLab®
interface,
set
the
data
logging
interval
and
pump
periods
as
desired.
Figure
4:
Collecting
data
in
real
time
