Hanna Instruments HI 255 User Manual
Page 45
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pH ELECTRODE CLEANING PROCEDURE
General
Soak in Hanna HI 7061 or HI 8061 General
Cleaning Solution for approximately ½ hour.
Protein
Soak in Hanna HI 7073 or HI 8073 Protein
Cleaning Solution for 15 minutes.
Inorganic
Soak in Hanna HI 7074 Inorganic Cleaning
Solution for 15 minutes.
Oil/grease
Rinse with Hanna HI 7077 or HI 8077 Oil and
Fat Cleaning Solution.
IMPORTANT: After performing any of the cleaning procedures, rinse the
electrode thoroughly with distilled water, refill the reference chamber with
fresh electrolyte (not necessary for gel-filled electrodes) and soak the electrode
in HI 70300 or HI 80300 Storage Solution for at least 1 hour before taking
measurements.
EC Probe Maintenance
Rinse the probe with clean water after measurements. If a more thorough
cleaning is required, remove the probe sleeve and clean the probe with a cloth
or a nonabrasive detergent. Make sure to reinsert the sleeve onto the probe
properly and in the right direction. After cleaning the probe, recalibrate the
instrument.
The platinum rings support is made of glass. Take great care while handling
the probe.