Siemens SITRANS LUT400 Series Operating Instructions Manual page 427

Palmer Bowlus Flume
Plan View
Side View
* for rated flows under free flow conditions
** The transducer must be above the maximum head by at least the blanking value (see
Near Range
).
Parameter
2.15. 1 . Primary Measuring Device (PMD)
2.15.4. PMD Dimensions
2.15.3.3. Maximum Head
2.15.3.4. Maximum Flow at 20 mA
2.15.3.5. Zero Head Offset
2.15.3.7. Flowrate Units
2.15.3.1. Method of Flow Calculation
Note: Palmer Bowlus Flume can only be setup using ratiometric calculations
Application information
• Sized by pipe diameter D
• Flume relief is trapezoidal
• Designed to install directly into pipelines and manholes
• Head is referenced to bottom of the throat, not bottom of the pipe
• For rated flows under free flow conditions, the head is measured at a distance of
D/2 upstream from the beginning of the converging section
Page 114 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS
Flow
D/2, point of measurement*
D = pipe or sewer diameter
Front View
Zero
Head
Value
Palmer Bowlus Flume
Maximum Flume width h
Ratiometric
transducer**
D
2.2.4.
max
A5E33329501