Rosemount 3095, Product Manual

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Rosemount Model 3095 Multivariable
™
Level Controller
3-2
Level is the primary variable used by the output board to compare to
the user-specified setpoint. The calculated level is converted into a unit-
less variable based on percentage, which is determined by the Range
Values (or, tank height) as specified by the operator.
• Range values should be from the bottom of the tank (0) to the
tank height.
• Setpoint Upper Limit should be below the top of the tank to
prevent overflow.
LEVEL CONTROLLER
SENSOR The Model 3095 Level Controller uses the proven multi-variable sensor
designed for the Rosemount 3095 series multi-variable transmitters.
capacitance sensor technology and microprocessor-based sensor
correction coefficients delivery for ±0.075% accuracy for the DP sensor.
There is no need to calibrate the DP sensor. All Model 3095 Level
Controllers are factory-calibrated from –LRL to +URL.
The Level Controller uses the DP input to calculate the Primary
Variable, which is
Level . Instead of calibration, the user simply
completes a Level Trim after installation of the Level Controller.
KEY:
Upper Range Value (URV) = Top of Vessel
Upper Setpoint Limit (USPL) = Select Below
Vessel Top
Setpoint (SP)
Level Controller Height = Measured from
Vessel Bottom
Lower Setpoint Limit (LSPL) = Select Above
Vessel Bottom
Lower Range Value (LRV) = Bottom of Vessel
URV
USPL
SP
LSPL
LRV
Controller
Height
FIGURE 3-1. Recommended Range
Values and Setpoint Limits.
This multi-variable sensor is designed with Rosemount’s