Xylem ISE Electrodes F 60 - Handbuch (Seite 18)

18
Response times
The response time depends on the concentration range.
It is:
• several seconds with high concentrations,
• several minutes near the detection limit.
The measured value is stable if the value does not
change by more than 0.1 mV within 30 seconds.
Interferences
•
pH values < 5 or > 7
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.