Introduction - Tescom ER3000 Manual

INTRODUCTION

The ER3000 Series (Electronic Regulator) is a versatile 0 to 100 PSIG
pressure controller. It can be used in conjunction with any pneumatically
actuated regulator or valve to control pressure.
Setpoints can be provided via an analog input (4-20mA, 1-5V, or 0-10V), the
digital RS485 interface, or a downloaded profile.
The controller can be wired through a standard serial communication
port using an 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).
Four modes of operation are available:
1. Internal feedback mode makes the controller an I/P when analog
setpoints are used and uses the internal sensor as the source of
feedback.
2. External feedback mode uses an external sensor as the feedback.
3. 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.
4. Manual mode allows for direct control of the solenoid valves (used
for troubleshooting the system only).
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