Jeulin Ex.A.O. 453 076 Mode D'emploi page 13

Data logging
Erreur ! Source du renvoi introuvable.
Ref : 453 076
3. Setup
3.1
The probe is shipped assembled, but without electrolyte. The probe head is protected by a
cap. Before use, simply remove this cap. Be sure to remove it gently or the membrane may
be damaged.
If the part clipped on the head removes at the same time as the protection, you have
to put it back.
3.2
Unscrew the head and then fill lit with electrolyte (Item no. 105 175). Tap the head on the
work surface to remove the air bubbles. Make sure that a small quantity of the electrolyte
overflows when screwing the head back onto the probe. The presence of a large air bubble
can be detected by taking a reading with the head pointing upwards and then downwards;
the value will fluctuate if there is an air bubble. If this is the case, unscrew the head and top
up the electrolyte solution.
When screwing the head back onto the probe, the excess electrolyte will overflow;
therefore, rinse the probe head with a jet of distilled water.
3.3
The probe is polarized by filling the head with electrolyte (see the preceding section) and
letting it stand with the head pointing downwards for a time period specified in the table
below.
The probe should be polarized in the following cases:
Note:
Polarization does not require electricity; the operation can be performed without plugging
the probe into its adapter or the computer assisted experimental system. For this probe,
polarization means that a chemical equilibrium is established in all parts of the glass
electrode.
After the probe is polarized, it must be calibrated. See the following section.
ENGLISH
Assembly
Filling the probe head
Polarization
Case
Initial use 10 hours or about one night
After changing the
electrolyte
After changing the
probe head
Polarization time
3 hours
3 hours
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