Hygiene pH monitoring

Sunday, 18 January, 2004 | Supplied by: Endress+Hauser Australia Pty Ltd


Endress+Hauser's TopCal S system for hygienic applications enables pH electrodes to be automatically cleaned and buffered without shutting the process - a true 'hot-tap' measurement. TopCal S enables more accurate and reliable pH monitoring of processes, extends electrode life and reduces servicing by maintenance staff.

The system is fully automated to user-defined specifications. It is based around a fully automated, pH electrode retraction assembly, made of stainless steel and designed to meet all FDA, 3A and EHEDG hygiene requirements for measuring instruments.

The assembly is mounted to the side of the vessel, where it supports the electrode in the process and pneumatically retracts it into a sealed cleaning cleaning chamber when scheduled. Within the chamber the electrode is hygienically washed and buffered before being returned to the process. The slope of the electrode is automatically checked each time it is buffered, and a maintenance warning message is sent to the operators when it nears the end of its life.

Where continuous pH readings are not needed, the electrode is held in a neutral state within the chamber for a user-defined period. Where Endress+Hauser's IsFET (glass-free) solid-state electrodes are used, the chamber provides protection from caustic solutions during cleaning cycles.

The TopCal S system also comprises a fully programmable control unit containing cleaning and buffering fluids, and a transmitter with 4-20 mA, Hart and Profibus interfaces. Endress+Hauser's user-friendly Readwin software provides fixed and user-definable programs; on-site or remote operation; automatic triggering of cleaning cycles; maintenance request indicators; and audit trails for quality assurance.

Online: www.au.endress.com
Phone: 1300 363 707
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