4.Maintenance
1. When not in use, the electrode should be soaked in the storage bottle containing 3M KCL soaking
solution to keep the glass membrane and junction in a healthy condition. Clean the bottle and
replace the soaking solution if it gets contaminated. The electrode should never be stored in pure
water such as deionized or distilled water.
2. The electrode is only as accurate as it is clean. Always thoroughly rinse off the probe before and
after each measurement with pure water in a container or with a wash bottle.
3. For tough contaminants, soak the electrode in Apera cleaning solution (AI1166) for 30 minutes.
Then use a soft brush to remove the contaminants. Afterwards, soak the electrode in 3M KCL
soaking solution for at least 1 hour. Rinse it off, then re-calibrate it before using again.
4. The connector of the electrode should be kept clean and dry. If contaminated, please clean it
with medical cotton and isopropyl alcohol and blow-dry it to prevent short circuit of the electrode
or slow response of the electrode.
5. The electrode should avoid testing strong acid and strong alkali solutions, as well as dehydrating
media such as absolute ethanol and concentrated sulfuric acid. If testing such solutions, the
immersion time should be minimized and the electrode should be carefully cleaned after use.
6. Every pH electrode will eventually age and fail. The typical service life of Apera pH electrodes is
12-24 months depending on the frequency of usage and how well you keep it clean and properly
stored. We recommend replacing your electrode every 12-18 months to ensure the best accuracy.
5.Limited Warranty
We warrant this electrode to be free from defects in material and workmanship and agrees to repair
or replace free of charge, at option of APERA INSTRUMENTS (Europe) GmbH, any malfunctioned
or damaged product attributable to responsibility of APERA INSTRUMENTS for a period of six
months. Warranty period is the time limit to provide free service for the products purchased by
customers, not the service life of the tester or electrodes.
This limited warranty does not cover any damages due to:
I. transportation;
II. storage;
III. improper use;
IV. failure to follow the product instructions or to perform any preventive maintenance;
V. modifications;
VI. combination or use with any products, materials, processes, systems or other matter not
provided or authorized in writing by us;
VII. unauthorized repair;
VIII. normal wear and tear; or
IX. external causes such as accidents, abuse, or other actions or events beyond our reasonable
control.
APERA INSTRUMENTS (Europe) GmbH
Wilhelm-Muthmann-Str. 18 | 42329 Wuppertal Germany
