Siemens 7ML5431 Operating Instructions Manual page 68

Commissioning
6.3 Application examples
Propagation Factor/Stillpipe Diameter
①
②
A
Values
Nominal Pipe Size
Propagation Factor
CLEF Range (2.8.4.4.) settings Low calibra-
Since pipe dimensions may vary slightly, the propagation factor may also vary.
a)
CLEF range covers the whole measurement range except first 700 or 1000 mm from sensor refer-
b)
ence 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.
68
sensor reference point
air gap
700 or 1000 mm (see CLEF Range settings in table below)
a)
③
low calibration point
④
CLEF range 2.8.4.4.
Range 0.3 to 1.0 depending on pipe size
Default 1.0000
40 mm (1.5") 50 mm (2")
0.9844 0.988
Low calibra-
tion point - tion point -
700 mm 700 mm
(2.29 ft) (2.29 ft)
b) b)
Operating Instructions, 10/2019, A5E32220602-AG
80 mm (3") 100 mm (4")
0.9935 0.9965
Low calibration Low calibration
point -1000 mm point -1000 mm
(3.28 ft) (3.28 ft)
b)
SITRANS LR250 with mA/HART
b)