Universal Head Versus Flow (2.15.5.) - Siemens SITRANS L 7ML5400 Operating Instructions Manual

Slope (2.15.4.3.)
The Flow Slope used in the flow calculation formula.
Values
Use when PMD is set to Trapezoidal Flume or Round Pipe.
Roughness Coefficient (2.15.4.4.)
The Flow Roughness Coefficient used in the flow calculation formula.
Values
Use when PMD is set to Round Pipe.
OCM Dimensions 1- 4
OCM Dimension 1 (2.15.4.5.)
OCM Dimension 2 (2.15.4.6.)
OCM Dimension 3 (2.15.4.7.)
OCM Dimension 4 (2.15.4.8.)
See table under PMD Dimensions (2.15.4.) (Page 239) to relate OCM Dimension 1-4 above to
a specific dimension for each directly supported Primary Measuring Device. For PMDs that are
not directly supported (Universal Head Flow), use a Universal Flow calculation. See Universal
calculation support (Page 149).
For more information on PMD, see Open Channel Monitoring (OCM) (Page 123).
9.2.15.5

Universal Head versus Flow (2.15.5.)

In the following table, enter Head and Flow Breakpoints for universal PMDs.
Head Breakpoints: The head breakpoints for which flowrate is known, defined in Units
(2.1.1.) (Page 172).
Flowrate Breakpoints: The flowrate corresponding to each Head Breakpoint entered, defined
in Flowrate Units (2.15.3.7.) (Page 238).
Head Values
Flowrate Values
See Universal calculation support (Page 149) for details on how to specify universal flows.
Entering breakpoints via SIMATIC PDM:
See Quick Start (Flow) in the LUT400 Communications manual1.
SITRANS LUT400
Operating Instructions, 04/2021, A5E33329501-AG
Parameter reference (LUI)
Range: -999.000 to 9999.000
Default: 0.000
Range: -999.000 to 9999.000
Default: 0.000
Range: 0.000 to 60.000
Default: 0.000
Range: 0 to 9999999
Default: 0
9.2 Setup (2.)
241