Storage; Aging - Xylem SI Analytics ScienceLine IDS Mode D'emploi

Storage | Aging
During short
measuring breaks
Overnight or
longer
16

Storage

Immerse the electrode (except ScienceLine A7780 IDS) in reference electrolyte
(KCl 3 mol/L, Ag + free). Prior to the next measurement, shortly rinse the
electrode with the test sample or deionized water.
Note
Do not scratch the pH membrane.
Put the clean electrode in the watering cap that is fi lled with reference
electrolyte (KCl 3 mol/L, Ag
Note
pH electrodes must not be stored dry or in deionized water. The electrode
could be permanently damaged by this. If the liquid in the watering cap has
dried up, condition the electrode in reference electrolyte (KCl 3 mol/L, Ag
for at least 24 hours.
Note
During longer storing periods, salt sediments may develop on the watering cap.
They do not affect the measuring characteristics and can easily be removed with
deionized water when the electrode is put into operation again.

Aging

Every pH electrode undergoes a natural aging process.
With aging, the responding behavior becomes slower and the electrode
slope and asymmetry change. Moreover, extreme operating conditions can
considerably shorten the lifetime of the electrode. These are:
• Strong acids or lyes, hydrofl uoric acid, organic solvents, oils, fats,
silverions, proteins
• High temperatures
• High changes in pH and temperature.
The warranty does not cover failure caused by measuring conditions and
mechanical damage.
+ free).
ScienceLine
+
T 814254 05/2014
free)