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Reference Manual
IP2048/RM, Rev AA
Appendix F: Configuring Using HART
February 2015
Figure F-1. Tank geometry
Data processing sequence:
1. Echoes are processed that occur between Upper Blanking (P023) and
Lower Blanking (P063).
2. D910 is derived from the Target Echo’s Time of Flight and the calculated
Speed of Sound: D910 = (Time of Flight x Speed of Sound) / 2
3. D902 = (D910 - P060)
4. Liquid Level = (P010 - D902)
5. D901 = (Liquid Level + P069)
4–20 mA/HART
SRP
Zero
Level
Bottom
Reference
(P010)
Lower
Blanking
(P063)
Upper
Blanking
(P023)
Distance (D910)
Level SV (D901)
Distance TV (D902)
Level
Offset
(P069)
Distance Offset
(P060)
TRP
UPSRP
Liquid Level
Mobrey MSP400RH
or MSP900GH
Abbreviations:
TRP= Tank Reference Point
SRP = Sensor Reference Point
UPSRP = User Preferred SRP
Mobrey MCU900
Series Control Unit