ER3000EI-1 Tescom Electronic Pressure Controller

The Emerson / Tescom ER3000 Series Electronic Pressure Controllers are versatile 0 to 100 psi pressure controllers. They can be used in conjunction with any pneumatically actuated regulator or valve to control pressure from subatmosphere to 20,000 psi with Cv's of up to 45.

Setpoints can be provided via an analog input (4-20 mA, 1-5 V, or 0-10 V), the digital RS485 interface, or a downloaded profile.

The RS485 interface makes pressure control by a computer easier than ever before. The controller can be wired quickly into the standard serial communication port found on any PC using a low-cost RS232 to RS485 adapter.

This communication channel also provides for the programming of a number of internal parameters, including PID tuning variables, zero and span, mode of operation, limits, etc.

Feedback can be derived either from the ER3000's internal temperature compensated sensor or an external transducer (4-20mA, 1-5V, or 0-10V). This second option allows for positioning the sensor downstream in the actual process line.

Four modes of operation are available. Internal feedback mode (which makes the controller an I/P when analog setpoints are used) and uses the internal sensor as the source of feedback. External feedback mode uses an external sensor as the feedback. Cascade mode creates a loop within a loop; the inner loop uses the internal sensor for feedback and the outer loop uses the external transducer for feedback. Manual mode allows for direct control of the solenoid valves (useful for troubleshooting the system).

In summary, the ER3000 electronic pressure regulator is easy to get up and running, yet offers the flexibility required by the most demanding user.