General Operation
7.11 Open Channel Monitoring (OCM)
SITRANS LUT400
Operating Instructions, 07/2019, A5E33329501-AC
129
Primary Measuring Device (PMD) (2.15.1.)
Exponential Devices
Flow Exponent (2.15.3.2.) (Page 231)
1
Maximum Head (2.15.3.3.) (Page 232)
Maximum Flow at 20 mA (2.15.3.4.) (Page 232)
Flowrate Units (2.15.3.7.) (Page 233)
K Factor (2.15.4.1.) (Page 235)
2
1)
Typical Flow Exponent range for Cut Throat Flume; consult your flume documentation.
2)
Required for exponential device absolute calculation only.
7.11.4.6 Khafagi Venturi
* The transducer must be above the maximum head by at least the blanking value (see Near
Range (2.2.4.) (Page 172)).
Application Information
● Similar to Parshall flume except that the floor is flat bottomed and the sidewalls are
curved.
● For rated flows under free flow conditions, the head is measured 1 x (channel width)
upstream from the beginning of the converging section.
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