Crison 53 30 Manual Usuario página 10

pH electrode 53 30
Introduction
The 53 30 is a pH electrode with a large ring
diaphragm of porous PTFE.
Low maintenance electrode, as it does not
require monitoring of electrolyte level.
Electrode preparation
Remove the storage protector
Verify that there are not air bubbles inside the
membrane
ing the electrode as a clinical thermometer.
Installation
In immersion, insertion, flotation housings,
etc. with PG 13,5 thread.
See Housing instruction manual.
In some cases the electrode is installed, with
the help of sockets and adapters, directly
onto pipes.
Cable. They are connected to coaxial cables
with an AS9 connector.
Calibration
See pH-meter instruction manual.
Measurements. Recommendations
See pH-meter instruction manual.
Ensure that the electrode's specifications are
adapted to the process.
Sample must cover the diaphragm
Maintenance
• Deposits forming on the electrodes, caused
by continual exposure of the sensors to
a dirty or contaminated medium, is one
of the most frequent causes of problems
when measuring pH. When possible it's
recommended to use a housing with au-
tomatic sensor cleaning system.
• When an electrode gets contaminated, the
simple rinsing with distilled water is not suf-
ficient. The most suitable cleaning solution
is one which acts in a more selective way
over the contamination (look for CRISON
regeneration solutions).
• Re-hydration. A "dry" electrode recovers by
immersing it in CRISON cleaning electrode
solution, code 96 00, or in diluted HCl solu-
tion for several hours. It is recommended to
read the information supplied with the elec-
trode's regenerating solutions.
troubleshooting
... the meter always shows the same pH value.
Short circuit in the electrode or cable.
Substitute the cable or the electrode.
... shifting of pH values.
Reference system contamination.
Replace the electrode
... unstable reading.
Diaphragm blockage.
Clean, regenerate, replace the electrode.
... impossible to perform calibration.
... very slow response.
Dirt on the diaphragm or the membrane.
De-hydrated membrane.
Electrode ageing or wear.
Clean, regenerate, replace the electrode.
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