Introduction - Tescom ER3000 User Manual

ER3000 USER MANUAL

1. INTRODUCTION

The ER3000 (Electronic Regulator) is a versatile 0 to 100 psi pressure
controller. It 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 (4-20mA, 1-5V, or 0-10V), 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.
1. Introduction 7