Siemens SITRANS LUT400 - Page 136

General Operation
7.11 Open Channel Monitoring (OCM)
SITRANS LUT400
134 Operating Instructions, 07/2019, A5E33329501-AC
BS- 3680 Trapezoidal Flume
①
Approach Width (B)
②
Transducer
③
3 to 4 x h
max
④
Throat width (b)
⑤
Throat length (L)
⑥
Flow
⑦
Zero head
⑧
Height (H)
⑨
Hump Height (p)
* The transducer must be above the maximum head by at least the blanking value (see Near
Range (2.2.4.) (Page 172)).
Parameter
Value
Primary Measuring Device (PMD) (2.15.1.)
(Page 230)
BS-3680 Trapezoidal Flume
PMD Dimensions (2.15.4.) (Page 234)
Slope m
Approach Width B
Throat Width b
Hump Height p
Throat length L
Maximum Head (2.15.3.3.) (Page 232)
Far Range (2.2.5.) (Page 172)
Flowrate Units (2.15.3.7.) (Page 233)
Method of Flow Calculation (2.15.3.1.)
(Page 231)
Maximum Flow at 20 mA (2.15.3.4.) (Page 232)