How to use
1.
Connect the electrode to the BNC connector of your pH meter.
2.
Before measuring, twist off the storage bottle cap (see graph on the right),
pull out the electrode and rinse it off with distilled or deionized water.
3.
Perform at least a two-point calibration before measuring after connecting
the new electrode to your pH meter.
4.
After using, put the electrode back into the storage bottle and twist on the
bottle cap.
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.
