Siemens SITRANS LUT400 Series - Page 420

A5E33329501 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS Page 107
mmmmm
General Operation
BS- 3680 Trapezoidal Flume
Parameter Value
2.15.1. Primary Measuring Device (PMD) BS-3680 Trapezoidal Flume
2.15.4. PMD Dimensions Slope m
Approach Width B
Throat Width b
Hump Height p
Throat length L
2.15.3.3. Maximum Head
2.2.5. Far Range
2.15.3.7. Flowrate Units
2.15.3.1. Method of Flow Calculation
2.15.3.4. Maximum Flow at 20 mA
1
m
Side View
Front View
b
B
* The transducer must be above the maximum head by at least the blanking value (see
2.2.4. Near
Range
).
L
h
transducer*
3 to 4 x h
max
Plan View
p
b
B
flow
Zero Head