
What happens to the trend when a filter restarts?
A restart leaves a time signature. Comparing the turbidity trace with the filter log helps operators work out what the PTV 1000 was measuring as the filter came back online.
Field notes and practical guidance for selecting, installing and looking after a PTV 1000.

A restart leaves a time signature. Comparing the turbidity trace with the filter log helps operators work out what the PTV 1000 was measuring as the filter came back online.

Choosing between the PTV 1000 infrared and white-light models affects the instrument order, the historian and how operators compare new readings with the existing record.

A useful verification record gives the next technician enough information to repeat the check, explain the result and reconnect it to the plant trend.