ER3000 Electric Controller

The Clorius ER 3000e electric controller is used for constant temperature control. It is specially designed for large engine jacket cooling water systems where conventional single loop controllers cannot maintain a constant and precise temperature. The ER3000 controller operates with TWO sensor inputs. One Pt 100 sensor is placed at the outlet from the engine and one Pt 100 sensor with a built-in 4-20 mA transmitter is placed at the inlet to the engine. The measured values of the controlled variables are compared with the setpoint value and adjusted via a PI or a PID control structure.

Design

The ER 3000 controller is designed for panel mounting. For an easy start-up, it has optimization for the automatic determination of favourable control parameters. The optimization starts when changing the set point or when switching over from manual mode to automatic control. The optimization can be disregarded.

For easy operation, it has four keys – two for scrolling or changing values, an enter key and a key for choosing manual or automatic control. Two digital displays show the process variable and the setpoint. 7 LEDs indicate alarm, the actuator opens, actuator closes, slave control, setpoint raising/lowering and manual mode.

The controller can be switched from auto mode to manual mode. In manual mode, the actuator can be opened, closed or stopped in a certain position. Three different alarm settings are possible:

• Alarm at a deviation from the setpoint SP
• Alarm at a fixed limit value
• Alarm at leaving a band around the setpoint SP

The 3 alarm settings include an alarm in case of a sensor fault. It can operate either as a three-position or as a two-position controller and has adjustable proportional band, integral action time and derivative action time.