K 500 / K 800
Aging
ba15360e03
10/2014
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Aging
Please note that every (combination) electrode undergoes a natural aging
process.The response time increases and the slope decreases with the age
of the (combination) electrode.The following factors shorten the lifetime con-
siderably:
Incorrect storage
Special measuring conditions (e.g. organic solutions, frequent measure-
ment 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
Combination electrodes:
Refill any used up bridge electrolyte.
Install an exchange membrane cap.
NOTE
Never pull the connection cable of the electrode.
The cable might be damaged.
Storage
Between two
measurements
Condition the electrode in standard solution.
Overnight
K 500:
Rinse the electrode with deionized water and store it in a dry place.
K 800:
Rinse the combination electrode with deionized water and dry it. Then
put on the storage vessel and store the electrode upright.
Longer than over-
night
K 500:
Rinse the electrode with deionized water, then dab it dry with a clean
paper towel and put on the protective cap. Store the electrode in a dry place.
K 800:
Remove the bridge electrolyte, then rinse the combination electrode
with deionized water and dab it dry with a clean paper towel. Store the combi-
nation electrode in the storage vessel in a dry place. For the following
measurement, prepare the combination electrode as described in section
C
OMMISSIONING
.
Store the reference electrode according to the instructions in its operating
manual.