DO600-en-GB_V7.4 12/16
9
DO
Bonded
Membrane
Cap
replacement
Important
Note
:
Do
not
touch
the
membrane
as
skin
oils
will
interfere
with
the
oxygen
permeability
rate
of
the
membrane.
Use
caution
when
replacing
the
bonded
cap.
1.
It
is
recommended
that
the
electrode
remain
attached
to
the
meter
during
this
replacement
process.
2.
To
remove
the
bonded
cap
from
the
electrode,
unscrew
the
cap
firmly
and
carefully
counter
‐
clockwise
from
the
electrode
(see
diagram
below).
3.
Discard
the
used
cap.
Please
Note:
The
installation
of
a
bonded
cap
causes
the
membrane
to
be
tightly
streched
over
the
cathode.
Once
a
bonded
cap
is
removed
reinstallation
is
not
possible
as
the
membrane
will
no
longer
be
properly
streched
over
the
cathode.
4.
Rinse
the
old
electrolyte
solution
from
the
Cathode
and
Anode
before
continuing.
5.
Use
the
supplied
Polishing
Paper
(See
Accessories
table)
to
clean,
polish,
shine,
and/or
remove
scratches
from
the
cathode.
Be
sure
to
moisten
the
cloth
before
polishing
the
cathode.
Do
not
over
‐
polish
the
sensitive
gold
cathode.
6.
Set
the
new
replacement
bonded
cap
on
a
flat
surface.
Leave
the
cap
in
this
position
throughout
the
replacement
process.
7.
Fill
the
bonded
cap
with
the
electrolyte
solution
up
to
the
bottom
of
the
threads
on
the
inside
of
the
cap.
8.
Tap
the
side
of
the
bonded
cap
to
help
jar
free
any
trapped
air
bubbles
from
the
electrolyte
solution.
9.
Keeping
the
cap
in
a
fixed
position
on
a
flat
surface,
carefully
insert
the
electrode
into
the
new
bonded
cap
by
first
dipping
and
removing
the
electrode
several
times
from
the
cap.
With
each
dip,
push
the
electrode
progressively
deeper
into
the
bonded
cap.
Finally,
screw
the
electrode
slowly
onto
the
bonded
cap
(clockwise)
until
fully
tightened.
The
dipping
and
removal
technique
minimizes
the
introduction
of
air
bubbles
into
the
electrolyte
solution.
Air
bubbles
in
the
electrolyte
can
compromise
measurements.
10.
During
the
tightening
of
the
bonded
cap,
excess
electrolyte
solution
will
leak
out,
this
is
normal
and
desireable
since
it
minimizes
the
introduction
of
air
pockets.
Clean
off
the
excess
electrolyte
before
use.
Cathode
Electrode
Bonded Cap
Anode
Air Vents
BONDED CAP
Clockwise to tighten
Counter-clockwise to loosen
