Page 114 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS A5E33329501
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General Operation
Palmer Bowlus Flume
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
Parameter Value
2.15.1. Primary Measuring Device (PMD)
Palmer Bowlus Flume
2.15.4. PMD Dimensions
Maximum Flume width h
max
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
Ratiometric
Note: Palmer Bowlus Flume can only be setup using ratiometric calculations
Zero
Head
transducer**
D/2, point of measurement*
Flow
Plan View
Front View
Side View
D = pipe or sewer diameter
* for rated flows under free flow conditions
** The transducer must be above the maximum head by at least the blanking value (see
2.2.4.
Near Range
).
D
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