Rosemount 3095 - Level Controller Overview

Rosemount Model 3095 Multivariable
™
Level Controller
2-2
LEVEL CONTROLLER
OVERVIEW
The Model 3095 Multivariable Level Controller is a multivariable,
microprocessor-based, analog and digital output device for use in single
loop, level process applications.
The Level Controller directly measures differential pressure (DP) and
computes a separate process variable that represents level in a tank
above a reference point.
The Level Controller uses the level variable in a control function to
compute a control output value. The control function is a PID
algorithm whose output is a 4–20 mA analog signal. A digital
representation of the value of the 4–20 mA output may be obtained
via HART digital communications.
Because the Level Controller is a multivariable device, optional process
variables can be measured and obtained as a secondary HART process
variable. The process variables available via HART are level, DP,
control output (CO), and process temperature (PT).
High voltage that may be present on leads could cause electrical shock:
• Avoid contact with leads and terminals.
3095-3095_01A
Air Supply In
Air
Out
I/P
I/P Positioner
Tank
Input
Pipe
Inlet
Valve
Field Wiring
4–20 mA Control Signal
Model 3095
Level Controller
Tank
Outlet
Pipe
FI
G
URE 2-1. Typical Level
C
ontroller
Installation Site.