Probe Maintenance - Lutron Electronics PDO-519 Operation Manual

5. PROBE MAINTENANCE

User first time to use the meter :
Intend to let the DO probe keep the best
condition. When user receive the DIGITAL
OXYGEN METER along the PROBE, it should
fill the Probe's Electrolyte at first.
User already use the meter for a certain
period :
Whenever user can not calibrate the meter
properly or the meter's reading value is not
stable, please check the oxygen probe to see
if the electrolyte in the probe head container
is run out or the diaphragm ( probe head with
diaphragm set) exist problem ( dirty ). If yes,
please fill the electrolyte or change the "
Probe head with diaphragm set " and make
the new calibration.
The consideration of Diaphragm ( probe head
with diaphragm set) :
The oxygen probe component is the thin Teflon
diaphragm housed in the tip of the probe. The
diaphragm is permeable by the oxygen molecules but
not by the considerably larger molecules contained in
the electrolyte. Due to this characteristic, the oxygen
may diffuse throughout the electrolyte solution
contained in the probe, and its concentration may be
quantified by the measurement circuit.
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