NAVI D-25 Instruction Manual page 153

6 Maintenance and Troubleshooting
6.1 pH (ORP) electrode maintenance
● Washing the electrodes
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If the tip of the pH electrode is extremely dirty, the speed
of its response may slow and it may cause errors in
measurement. If the electrode is so dirty that it cannot be
cleaned by rinsing with pure (de-ionized) water, wash
the electrode using the most appropriate method below.
General dirt & oily grime
Wipe the dirt/grime off using cotton gauze that contains
a neutral detergent.
Inorganic grime
Rinse using a hydrochloric acid solution or cleaning liq-
uid (#220) of approximately 1 mol/L. Be sure not to soak
the electrode in strong acid for a long period of time.
HORIBA