Siemens SITRANS L, Руководство по эксплуатации, Страница: 60 / 269

Commissioning
6.3 Application examples
SITRANS LR250 with FOUNDATION FIELDBUS
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Operating Instructions, 09/2021, A5E32221411-AH
Parameter
type
Parameter No. /Name Options/
Values
Function
Quick Start
Wizard param-
eters
Introduction NEXT Continue with Wizard.
Language NEXT Continue with current
language.
Material LIQUID
Response Rate MED Medium =1 m/minute
Units M meters
Low Calibration Point 5 5 m (16.4 ft)
High Calibration Point 0.5 0.5 m (1.64 ft)
Wizard Complete FINISH Transfers Quick Start
settings to device.
Independent
parameters
Loss of Echo (LOE) Timer (2.3.6.) 120 120 seconds
Return to Measurement : press Mode to start normal operation.
6.3.2 Horizontal vessel with volume measurement
Note
The minimum distance from the flange face to the target is limited by Near Range (2.5.1.) .
To obtain level measurement proportional to vessel volume in a chemical vessel:
•
Low Calibration Point = 3.5 m (11.48 ft) from sensor reference point
• High Calibration Point = 0.5 m (1.64 ft) from sensor reference point
• Max. fill/empty rate = 0.2 m/min (0.65 ft/min)
• Select vessel shape, Parabolic Ends, and enter values for A and L, to obtain a volume
reading instead of level.
In the event of a loss of echo:
•
SITRANS LR250 is to report a status of BAD or UNCERTAIN after 120 seconds (2 minutes).