Turbimax CUS51D Operation
Endress+Hauser 37
The stability criteria are used to monitor the quality of the individual calibration points in
the course of the calibration process. The aim is to achieve the highest possible calibration
quality in the shortest possible time frame while taking external conditions into account.
For calibrations in the field in adverse weather and environmental conditions, the
measured value windows selected can be suitably large and the time frame selected
can be suitably short.
8.1.3 Cyclic cleaning
For cyclic cleaning, compressed air is the most suitable option. The cleaning unit is either
supplied or can be retrofitted, and is attached to the sensor head. The following settings
are recommended for the cleaning unit:
Type of fouling Cleaning interval Cleaning duration
Severe fouling with rapid buildup of deposits 5 minutes 10 seconds
Low degree of fouling 10 minutes 10 seconds
8.1.4 Signal filter
The sensor is fitted with an internal signal filter function in order to adapt the
measurement flexibly to different measuring requirements. Turbidity measurements based
on the principle of scattered light may have a low signal-to-noise ratio. In addition, there
may be disturbances from air bubbles or contamination for example.
However, a high level of damping affects the sensitivity of the measured value required in
applications.
Measured value filter
The following filter settings are available:
Measured value filter Description
Weak Low filtering, high sensitivity, fast response to changes (2 seconds)
Normal (default) Medium filtering, 10-second response time
Strong Strong filtering, low sensitivity, slow response to changes (25 seconds)
Specialist This menu is designed for the Endress+Hauser Service Department.
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