Xylem ISE Electrodes K 60 - Handbuch (Seite 16)

16
Aging
Please note that every electrode undergoes a natural
aging process. The response time increases and the
slope decreases with the age of the electrode. The
following factors shorten the lifetime considerably:
• Incorrect storing
• Special measuring conditions (e.g. organic solutions,
frequent measuring with high concentrations of
interfering ions)
• High temperatures
• High changes in temperature
The warranty does not cover damage caused by
measuring conditions and mechanical damage.
Maintenance
•
For combination electrodes: replenish used reference
electrolyte solution.
• In case of increased response times or drifting
measured values, place the electrode into distilled
water for one hour and then store it in diluted
standard solution for several hours.
Storage
• Between two measurements, place the
combination
electrode into diluted standard
solution.
• Overnight up to one week: Push the closing ring
upwards to close the refilling opening. Then rinse
the combination electrode with deionized water,
blot it dry using a clean paper towel and store it
in a dry place.