Mettler Toledo 405-DPAS-SC-VP Manuel D'instructions page 9

405-DPAS-SC-VP pH Electrodes
Servicing a clogged or dry reference junction: Immerse
the electrode in a beaker of 3M KCl. Heat the solution to
approximately 70 °C (160 °F) and allow electrode to soak
in this solution as it cools to room temperature.
6 Troubleshooting
No response (symptom)
– Poor meter connection
– Cracked glass
Slow response (symptom)
– Dehydrated pH membrane
– Clogged reference junction
– Protein contamination
– Depleted gel layer
Noise (symptom)
– Poor meter connection
– Clogged reference junction
Low slope (symptom)
– Dehydrated pH membrane
– Contaminated membrane
For further assistance, call our Customer Service Center at
+1-800-352-8763.
405-DPAS-SC-VP pH Electrodes
Printed in Switzerland
C heck connectors at the meter
and at the electrode
Replace electrode
Rehydrate (see Maintenance)
Soak in warm KCl (see Maintenance)
U se pH Electrode Cleaner (see
Maintenance)
U se Reactivating Solution (see
Maintenance)
Check connector
Soak in warm KCI (see Maintenance)
Rehydrate (see Maintenance)
U se pH electrode cleaner (see
Maintenance)
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