32
The Galvanic DO sensor solution will appear milky white after
use but will NOT affect the accuracy of the sensor unless there
is excessive build up. The color change is acceptable and
normal as long as DO readings remain stable.
i
At the time the membrane cap is changed, YSI recommends that you
rinse the anode (silver shaft of the sensor) with purified water and
wipe with a clean paper towel. If white deposits are evident on the
anode after cleaning, YSI recommends that you remove this material
by sanding the anode with the sandpaper disk included in the
membrane kit. Follow the “Mechanical Cleaning” instructions under
the Polarographic Silver Anode section.
IMPORTANT
: Be sure to: (1) Use only the fine sanding discs
provided and (2) Sand as mentioned in the above procedures.
Not adhering to either of these instructions can damage the
electrodes.
WARNING:
DO NOT PERFORM THE POLAROGRAPHIC
CHEMICAL CLEANING ON A GALVANIC SENSOR.
i
If this procedure is unsuccessful, as indicated by improper sensor
performance, contact YSI Technical Support or the Authorized Dealer
where you purchased the instrument.
SENSOR STORAGE
SHORT TERM STORAGE
The instrument is supplied with a grey calibration/storage sleeve that
slides over the probe guard. The sleeve is used for short-term storage
(less than 30 days). Be sure to keep a small amount of moisture (tap
water) on the sponge in the sleeve during storage. This is simply done
to maintain a 100% water saturated air environment which is ideal for
short-term sensor storage. The sensors should not be submersed in
water. The intent is to create a humid air storage environment.
LONG TERM STORAGE
Dissolved oxygen sensors (Polarographic and Galvanic) should always
be stored long term in a dry state. When storing for more then 30 days,
remove the membrane cap and thoroughly rinse the sensor. Once the
sensor has been rinsed either blow it dry with compressed air or allow
