Siemens SITRANS LUT400 - Page 135

General Operation
7.11 Open Channel Monitoring (OCM)
SITRANS LUT400
Operating Instructions, 07/2019, A5E33329501-AC
133
BS- 3680 Round Nose Horizontal Crest Weir
①
Height (h)
②
Transducer
③
Crest width (b)
④
Crest length (L)
⑤
Crest height (p)
⑥
3 to 4 x h
max
* 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 Round Nose Horizontal Crest Weir
PMD Dimensions (2.15.4.) (Page 234)
Crest Width b
Crest Height p
Crest 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)