Siemens SITRANS LUT400 - Page 146

General Operation
7.11 Open Channel Monitoring (OCM)
SITRANS LUT400
144 Operating Instructions, 07/2019, A5E33329501-AC
* 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)
Rectangular Weir Contracted
PMD Dimensions (2.15.4.) (Page 234)
Crest Width b
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)
Round Pipe
①
Pipe Inside Diameter (D)
②
Transducer
③
This dimension should be at least 15 cm (6") shorter than the blanking value (see Near Range
(2.2.4.) (Page 172)).
④
The transducer must be above the maximum head by at least the blanking value.
⑤
Height (h)
Parameter
Value
Primary Measuring Device (PMD) (2.15.1.) (Page 230)
Round Pipe
PMD Dimensions (2.15.4.) (Page 234)
Pipe Inside Diameter D
Slope (fall/run) s
Roughness Coefficient n
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)