Siemens Sitrans LR250, Руководство по эксплуатации, Страница: 75 / 306

Commissioning
6.3 Application examples
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 08/2014, A5E32221386-AC
73
①
sensor reference point
③
low calibration point
②
air gap
④
CLEF range 2.5.7.4.
A 700 or 1000 mm (see CLEF Range settings in table below)
Propagation Factor/Stillpipe Diameter
Values Range 0.3 to 1.0 depending on pipe size
Default 1.0000
Nominal Pipe Size
a)
40 mm (1.5") 50 mm (2") 80 mm (3") 100 mm (4")
Propagation Factor 0.9844 0.988 0.9935 0.9965
CLEF Range (2.5.7.4.) settings Low
calibration
point - 700
mm (2.29 ft) b)
Low
calibration
point - 700
mm (2.29 ft) b)
Low
calibration
point - 1000
mm (3.28 ft) b)
Low
calibration
point - 1000
mm (3.28 ft) b)
a)
Since pipe dimensions may vary slightly, the propagation factor may also vary.
b)
CLEF range covers the whole measurement range except first 700 or 1000 mm from sensor
reference point
Note
Flanged and Hygienic encapsulated antenna
For Flanged encapsulated antenna (7ML5432) and Hygienic encapsulated antenna
(7ML5433) match the process connection size to the pipe diameter. For example, DN80/3"
flange to DN80/3" pipe.