Parshall Flume - Siemens SITRANS LUT400 Operating Instructions Manual

General Operation
7.11 Open Channel Monitoring (OCM)
7.11.4.3

Parshall Flume

Note
C = Converging Dimension.
①
Zero head
②
Converging dimension C
③
2/3 C
④
Flow
⑤
Transducer*
* The transducer must be above the maximum head by at least the blanking value (see Near
Range (2.2.4.) (Page 172)).
Application Information
● Sized by throat width
● Set on solid foundation
● For rated flows under free flow conditions, the head is measured at 2/3 the length of the
converging section from the beginning of the throat section.
Parameter
Primary Measuring Device (PMD) (2.15.1.) (Page 230)
Flow Exponent (2.15.3.2.) (Page 231)
Maximum Head (2.15.3.3.) (Page 232)
Maximum Flow at 20 mA (2.15.3.4.) (Page 232)
K Factor (2.15.4.1.) (Page 235)
Typical Flow Exponent range for Parshall Flume; consult your flume documentation.
a
126
b
Operating Instructions, 07/2019, A5E33329501-AC
Value
Exponential Devices
1.522–1.607
a
SITRANS LUT400