Siemens 7ML5431 - Application Examples; Liquid Resin in Storage Vessel, Level Measurement

Commissioning
6.3 Application examples
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG
63
● Use UP or DOWN arrow to scroll to an icon. When an icon is highlighted, that
feature becomes active.
● To move a cross-hair, press RIGHT arrow to increase the value, LEFT arrow to
decrease.
● To Zoom into an area, position the intersection of the cross-hairs at the center of that
area, select
Zoom, and press RIGHT arrow. Press LEFT arrow to Zoom out.
● To update the profile, select Measure and press RIGHT arrow.
● To return to the previous menu, select Exit then press RIGHT arrow.
6.3 Application examples
Note
In the applications illustrated below, values are for example
purposes only.
You can use these examples as setup references. Enter the values in the parameter tables
to select the corresponding functions.
Configure the basic settings using the Quick Start wizard parameters. (These parameters
are inter-related, and changes take effect only after you select
FINISH to apply changes in
the final step.)
In each example, after performing a Quick Start, navigate to the other required parameters
either via the handheld programmer, or using a Device Management tool (SIMATIC PDM or
AMS Device Manager) and enter the appropriate values.
6.3.1 Liquid resin in storage vessel, level measurement
Note
Minimum distance from flan
ge face to target is limited by
Near Range (2.8.1.)
.
To obtain level measurement/4 to 20 mA output proportional to resin levels:
● Low Calibration Pt. = 5 m (16.5 ft) from sensor reference point
● High Calibration Pt.= 0.5 m (1.64 ft) from sensor reference point
● Max.fill/empty rate = 0.2 m/min (0.65 ft/min)
In the event of a loss of echo:
● SITRANS LR250 is to go into Fail-safe High after 2 minutes.