Typical Flow Characterization - Siemens SITRANS L 7ML5400 Operating Instructions Manual

General Operation
7.11 Open Channel Monitoring (OCM)
7.11.4.8

Typical flow characterization

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Characterization is achieved by entering the head and corresponding flow breakpoints, either
from empirical measurement or from the manufacturer's specification. Increasing the number
of defined breakpoints will increase the accuracy of the flow measurement.
Breakpoints should be concentrated in areas exhibiting the higher degrees of non linear flow.
A maximum of 32 breakpoints can be defined, with a minimum of four required. The curve's
end point is always specified by the parameters Maximum Head (2.15.3.3.) (Page 237) and
Maximum Flow at 20 mA (2.15.3.4.) (Page 237). These two parameter values are in addition
to the 32 breakpoints available for definition.
Use as many breakpoints as required by the complexity of your PMD.
See Volume (Page 95) for more information and parameter Universal Head versus Flow
(2.15.5.) (Page 241) for characterization.
150
Flow Breakpoints
Maximums (Max. Head, Max. Flow)
Curved
Head Breakpoints
Operating Instructions, 04/2021, A5E33329501-AG
SITRANS LUT400