Do Probe Maintenance - Tintometer Lovibond SensoDirect 150 Mode D'emploi

Calibration - additional information:
As oxygen in air is typically 20.9 %, use ambient air O
calibration.

5.3 DO Probe maintenance

a) First time use of the meter:
To keep the DO probe in the best condition, be sure to fill the Oxygen Probe, with
Electrolyte prior to first use.
b) After using the probe for a certain period:
If the user cannot calibrate the meter properly or the meter's readings are not stable,
please check the oxygen probe to see if the electrolyte in the probe head container has
run out or the diaphragm (inside the probe head) has a problem (e.g. is dirty). If yes,
please fill the electrolyte or change the diaphragm set. Then recalibrate.
Diaphragm (probe head including diaphragm set):
A key component of the oxygen probe is the thin Teflon diaphragm housed in the tip of
the probe. This diaphragm is permeable by oxygen molecules but not by the considerably
larger molecules contained in the electrolyte. Accordingly oxygen may diffuse throughout
the electrolyte solution contained in the probe, and its concentration may be quantified by
the measurement circuit. This sensitive diaphragm is rather delicate and is easily damaged if
it comes into contact with solid objects or is subjected to knocks. If the diaphragm is dam-
aged or the electrolyte has run out, please see following procedure:
Fig. E
E-1
E-2
E-3
SensoDirect 150
Probe Electrolyte
Probe head including
Diaphragm set
1.
2.
E-1 Probe body
3.
E-2 Temp. sensor
4.
E-3 Probe head
5.
for quick & precise
2
Unscrew the "Probe Head" (Fig E-3).
Pour out the old Electrolyte from the
container inthe "Probe head".
Fill the container with new Electrolyte.
Screw the probe head (Fig E-3) back onto
the probe body.
When not in use, insert the probe head
into the probe protection cover (Fig. D-5)
that is equipped with a wet sponge.
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