Siemens Sitrans LR400 Instruction Manual page 46

4.2.3.A Hover Level (F = 40%)
Defines (in percent) how high the TVT (Time Varying Threshold) curve is placed
above the echo profile, relative to the largest echo. When SITRANS LR400 is located
in the center of the vessel, lower the hover level to prevent multiple echo detections.
Values
4.2.3.B Window Trigger (F = 80%)
Defines the position of the window on the leading edge of the selected echo,
relative to the amplitude. Used only on Silo1 and Silo2 applications (see Application
Type on page 29).
Values
4.2.4 Level Parameter
4.2.4.1 Level URV (F = 20 m)
Full scale of level (see Vessel Functional Dimensions on page 27)
Value
Set the URV as the full scale of level above the bottom of the vessel (see
Functional Dimensions
corresponds to an output current of 20 mA.
Note: This parameter is also set using Parameter 1.5 (Level URV).
4.2.4.2 Level LRV (F = 0 m)
Empty scale of level (see Vessel Functional Dimensions on page 27)
Value
Set the LRV as the empty scale of level above the bottom of the vessel (see
Functional Dimensions
corresponds to an output current of 4 mA.
Note: This parameter is also set using Parameter 1.6 (Level LRV).
Page 42 SITRANS LR400 (7ML5421) – INSTRUCTION MANUAL
Range: 0 to 100%
Range: 0 to 100%
numerical value
on page 27) in the units selected with Parameter 4.1.1. This level
numerical value
on page 27) in the units system selected with Parameter 4.1.1. It
Vessel
Vessel
7ML19985FH06