Electrode Care and Maintenance
● Always keep the probe’s membrane moist.
● If the DO probe is out of use for long periods, screw off the membrane cap and rinse the
probe's cathode, anode and the membrane with distilled water, then soak up residual water
on them with filter paper, and re-install the probe.
Replacing the Batteries:
If the battery indicator disappears during the use, the batteries require replacing.
1. Twist the electrode collar counter clockwise, pull the electrode module out from the unit.
2.
Insert two “AAA” batteries into the battery compartment (note polarity).
3. Align the slot on the electrode module, push the electrode into the unit.
4. Twist the electrode collar clockwise until it is tight.
Troubleshooting
LCD DISPLAY
CAUSE
CORRECTIVE ACTION
DO probe does not connect
to tester
Check the connector of sensor
Measured value is out of
range
Check if the DO membrane is clogged,
dirty or broken
Electrolyte
solution
is
depleted
Refill electrolyte solution
Zero oxygen solution is
contaminated
Replace the calibration solution
+
Cathode and Anode
Membrane cap
