TR250Z Oxygen Transmitter – Manual
CO2Meter.com
Rev. 27 April, 2015
Pg. 7 of 13
Standard Operation
The
O2
transmitters
comes
factory
calibrated
for
easy
installation.
During
its
life
cycle
calibration
may
become
periodically
necessary.
We
recommend
performing
a
span
O2
calibration
every
month
for
guaranteed
operation
and
ensured
accuracy.
No
other
calibration
is
necessary
during
the
life
cycle
of
the
sensor.
Entering the Service Menu
To
enter
the
service
menu
the
buttons
must
be
pressed
in
a
factory
‐
set
order.
This
code
can
be
customized
before
shipment
but
by
default
will
be
1
‐
2
‐
3.
The
buttons
must
be
pressed
within
a
half
second
of
each
other,
else
the
unit
will
return
to
standard
operating
mode.
When
in
the
service
menu
the
unit
will
not
update
the
current
O2
readings.
Once
you
enter
the
menu
the
display
will
read
“1234”
or
“2222”.
Performing an Atmospheric Span Calibration
1.
Allow
sensor
to
stabilize
for
at
least
1
hour
2.
Ensure
the
sensor
is
exposed
to
fresh
air
3.
Enter
the
service
menu
when
you
press
123
one
after
another
in
that
sequentially.
4.
The
display
will
show
1234
flashing
indicating
that
you
are
in
the
service
menu
5.
Press
2
to
enter
the
Oxygen
submenu
6.
Press
2
again
to
perform
the
atmospheric
calibration
7.
Press
3
to
escape
