HOW TO REPLACE MEMBRANE SET

Please replace membrane set when any
of following situation occurs:
a. The probe has been used for >1 year
b. Seeing error code E2/E3 but the probe
central working area is still clean.
c.Electrolyte is less than ½ full

d.Membrane is broken or wrinkled
e.Measuring speed is much slower than
before.

The procedures are:
(1) Prepare a new membrane set.
NOTE: Due to the structure of membrane is
delicate, once the membrane set has
been removed from the probe, it is
“not suggested” to re-installed the
same membrane set repeatedly as it
might influence the reading.
(2) Rotate to unscrew the probe
protective cover and remove the
membrane set from probe.
(3) Follow the steps in above section to
“clean the electrode”.
(4) Slowly pour the electrolyte solution
to the new membrane set till full.
(5) Secure and install the new
membrane set on the probe
properly.
After install the new
membrane set with
electrolyte filled, it is
normal to found some
small bubbles inside of
the membrane.
(6) Proceed “calibration” as above
section after replace the membrane
set.
NOTE: Under normal use, the extra membranes
set enclosed in package will be enough to
cover the replacement need for entire DO
probe life time.