Emerson Tescom ER5000 Series User Manual page 50

ER5000 — Glossary of Terms
Stable State
Any time that a PID Controller
than one loop of monitoring and response. Proper
find a correct balance between stability and speed of response.
Steady State Error
See Offset.
Step Change
Change in Setpoint that occurs within a single loop of monitoring
and response for a PID controller.
Supply Pressure
Pressure applied to the inlet of the ER5000 from an external
source. Sent by the ER5000 as
Loaded or Air Actuated Regulator.
generates a zero Error for more
Tuning aims to
Pilot Pressure to pilot a Dome
System Pressure
The pressure of the gas or liquid in a
by the Regulator, which is controlled in turn by the
from the PID Controller. There are two components to system
pressure: the inlet pressure (upstream pressure), which is the
pressure level of the gas or liquid in the process line at the point
where it enters the regulator and the outlet pressure (downstream
pressure), which is the pressure level of the gas or liquid as it exits
the regulator. For a Pressure Reducing
must be higher than the outlet pressure.
Term
Used alternatively with value when referring to Proportional,
Integral and Derivative.
Transducer
Commonly used term for an external sensing device that provides
a feedback signal.
Process Line that is controlled
Pilot Pressure
Regulator, the inlet pressure
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