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Quick Start Guide
13
December 2014
Figure 10. Tank geometry
The process value (e.g. liquid level) is indicated in the HART Primary Variable (D900),
which drives the 4–20 mA output signal.
Parameter Fast Key 3490 Series Menu Navigation
Lower Blanking (P063)
2, 2, 5, 6
SETUP,[Tag], ENGINEERING, Lower Blanking
Upper Blanking (P023)
2, 2, 5, 5
SETUP,[Tag], ENGINEERING, Upper Blanking
Distance Offset (P060)
2, 2, 2, 2
SETUP,[Tag], DUTY, Distance Offset
Level Offset (P069)
2, 2, 2, 4
SETUP,[Tag], DUTY, Level Offset
20mA Point
1
1. Configure this parameter if not communicating HART variables (PV, SV, TV, and FV) to a Host.
2, 2, 1, 3
SETUP, [Tag], OUTPUT, CURRENT, Upper Range Val.
4mA Point
1
2, 2, 1, 4
SETUP, [Tag], OUTPUT, CURRENT, Lower Range Val.
Primary Variable (D900)
1, 2, 1
MONITOR,[Tag], READINGS, VARIABLES, Primary Variable
Level SV (D901)
1, 2, 2
MONITOR,[Tag], READINGS, VARIABLES, Level SV
Distance TV (D902)
3, 2, 1, 3
MONITOR,[Tag], READINGS, VARIABLES, Distance TV
Distance (D910)
3, 1, 2, 1, 1
MONITOR,[Tag], DIAGNOSTICS, Distance
Abbreviations:
TRP= Tank Reference Point. SRP = Sensor Reference Point. UPSRP = User Preferred SRP
4–20mA/HART
Rosemount
3107 or 3108
Rosemount
3490 Series
control unit
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
20mA point
4mA point
Liquid Level