69
Test measurement
Rinse the probe tip with distilled water.
Immerse the probe in the Hanna Instruments pH buffer 7.01 (HI7007) until the solution is in contact
with the metal ring and stirr gently for 30 seconds. The reading must be near pH 7.01. Repeat the
operation for pH 4.01 solution (HI7004). The difference from the previous reading must be near pH 3.
Storage
To minimize clogging and assure a quick response time, the glass bulb and the junction should be
kept moist and not allowed to dry out. This can be achieved by installing the input lines in such way
that the probe holder is kept filled with sample.
When not in use, for longer time, dismount the probe and keep in the protective cap with a few drops
of HI70300 Storage Solution or, in its absence, HI7082 (KCl 3.5 M Solution).
Follow the Preparation Procedure before remount the probes.
Note: Never store the probe in distilled or deionized water.
Periodic maintenance
Inspect the probe and the cable. The cable used for the connection must be intact and there must be
no points of broken insulation on the cable or cracks on the probe stem or bulb.
Cleaning procedure
General
Soak in Hanna Instruments HI7061 General
Cleaning Solution for approximately
1
/
2
hour.
Removal of films, dirt or deposits on the membrane/junction:
Protein Soak in Hanna Instruments HI7073 Protein Cleaning Solution for 15 minutes.
Inorganic
Soak in Hanna Instruments HI7074 Inorganic
Cleaning Solution for 15 minutes.
Oil/grease Rinse with Hanna Instruments HI7077 Oil and Fat Cleaning Solution.
IMPORTANT: After performing any of the cleaning procedures rinse the probe thoroughly with distilled
water and soak the electrode in HI70300 Storage Solution for at least 1 hour before reinstalling it.
If the bulb and/or junction are dry, soak the probe in HI70300 Storage Solution for at least one hour.
If the probe does not respond to pH changes, electronics may be down and the electrode should be
replaced.
MAINTENANCE
To Next Page
Loading...
Need help?
General
