Crison 5335 Manual De Instrucciones página 10

pH electrode 53 35
Introduction
The 53 35 is a low maintenance pH elec-
trode for waste water.
Electrode preparation
• Remove the storage protector
• Verify that there are not air bubbles inside
the membrane
by shaking the electrode as a clinical ther-
mometer.
Installation
In immersion, insertion, flotation housings,
etc. with PG 13,5 thread.
See Housing instruction manual.
This electrode is not recommended for in-
stallation on pipe.
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 sen-
sors to a dirty or contaminated medium, is
one of the most frequent causes of prob-
lems when measuring pH. When possible
it's recommended to use a housing with
automatic sensor cleaning system.
• When an electrode gets contaminated, the
simple rinsing with distilled water is not
suffi cient. The most suitable cleaning so-
lution is one which acts in a more selective
way over the contamination.
Do not use for cleaning solutions with
pH<2. They provoke rapid alteration of the
solid electrolyte.
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.
Reference system contamination.
Clean, regenerate, replace the elec-
trode.
... impossible to perform calibration.
... very slow response.
Dirt on the membrane.
De-hydrated membrane.
Electrode ageing or wear.
Clean, regenerate, replace the elec-
trode.
10
. They can be removed
.
.