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TABLE OF CONTENTS
Specifications ........................................................... 3
Accessories ............................................................. 3
Initialoperations ....................................................... 4
Probe preparation ..................................................... 4
Probepolarization .................................................... 5
Measurements ......................................................... 5
Altitudecompensation .............................................. 7
Salinity compensation .............................................. 8
Calibrationprocedure ............................................... 9
Probe & membrane maintenance ........................... 10
Battery replacement ................................................ 11
WARRANTY
This instrument is warranted against defects in materials
and manufacturing for a period of two years from the date
of purchase. Probe is warranted for 6 months. If during
this period the repair or replacement of parts is required,
where the damage is not due to negligence or erroneous
operation by the user, please return the parts to either
distributor or our office and the repair will be effected free
of charge.
Damages due to accidents, misuse, tampering or lack of
prescribed maintenance are not covered. 11
If the Platinum cathode is tarnished or stained, which could
be due to contact with certain gases or to an extended use
with a loose or damaged membrane, it should be cleaned.
Use a clean lint-free cloth and rub the cathode very gently
side to side 4-5 times. This will be enough to polish it and
remove any stains without damaging the Platinum tip.
Afterwards, rinse the probe with deionized or distilled
water and install a new membrane cap using fresh electro-
lyteand follow the steps above. Recalibrate the instrument.
Note: To obtain accurate and stable measurements, it is
important that the surface of the membrane be in
perfectcondition.Thissemipermeablemembraneiso-
lates the sensor elements from the environment, but
allows oxygen to enter. If any dirt is observed on the
membrane,rinseitcarefullywithdistilledordeionized
water. If any imperfections still exist, or any damage
is evident (such as wrinkles or tears-holes), replace
themembrane.MakesurethattheO-Ringisproperly
seatedinthemembranecap.
Note:Ifdon’ttakemeasurementsfora few hours, protectthe
probewith the supplied cap.
BATTERY REPLACEMENT
When the battery becomes weak, the meter will display the
blinkingbattery symbol to indicatethat only about 10hoursof
battery life remain. A low battery will result in unreliable
measurements. It is recommended to replace the battery
immediately by using an alkaline 9V battery.
Turnthe meter off, unscrewthe two screws ontherear of the
instrument, remove the cover and replace the 9V battery
with a new one. Install the battery while paying attention to
its polarity and reattach the cover.
