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Reference Manual
IP2030/RM, Rev AA
Section 4: Getting started
June 2014
Section 4: Getting started54
Setting P114 (or P124) when a HART level transmitter is connected
The maximum level measurement from the HART transmitter must be equal to the height of the
liquid when the vessel is full.
The level measurement, after any input offset has been applied, must be re-scaled to the range
0.0 to 1.0 ready for input to the NLP calculation.
For example, if the level measurement range is 0.0 to 4.0, set P114 = (1.0 / 4.0) = 0.25
Setting P116 (or P126) to the maximum volume of the vessel
Parameter P116 (or P126) must be programmed with the volume of the contents in a full vessel
in the units chosen (P200, P201, P202, or P203, as applicable to the transmitter input channel).
The level measurement value, which is now in the range 0.0 to 1.0, is multiplied by the P116
(or P126) value to get the volume of the contents. The resulting volume is then passed to the
optional low volume cut-off action. See pages 45, 49, or 51, as applicable.
Note (MCU901/MCU90F)
P116 is in the menu SETUP / [CONTROLLER /] INPUT CHANNEL / Ch1 Post Scale
P20x parameters are in the menu SETUP / [CONTROLLER /] DISPLAY
Note (MCU902)
P116 is in this menu:
SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 1/ Ch1 Post Scale
P126 is in this menu:
SETUP / [CONTROLLER /] PV CALCULATION / CHANNEL 2/ Ch2 Post Scale
P20x parameters are in the menu SETUP / [CONTROLLER /] DISPLAY