Contrec 515 BR03, Руководство по эксплуатации

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Introduction
2 515 BR03 - 15 August 2021
Overview
The 515 BR03 application is a batching ratio controller for delivery of
preset quantities at preset ratios using mass frequency inputs. Batch control
can operate in preset or on-off modes, while flow control can be set to
various loop control modes.
This application provides the operator with clear local readout including
flowrate deviation and can be controlled via communications in more
automated systems. There is quick access to commonly used preset values
directly from the front panel if access has been authorized.
The PI control of the process flow is via a 4-20mA proportional valve or
pump controller. It has integral wind-up protection, a deadband, output hold
and ramp time that can be programmed to reduce wear on valves and
actuators and provide for bumpless operation.
Calculations
There are three types of control modes in which the process flow is
dependent on the main flow. These are RATIO, BLEND-1 and BLEND-2
modes where the relationship between the flows are as follows:
Ratio Control Mode.
The process flow is a ratio of the main flow (0 to 400% range).
Blend Control Modes.
These modes cater for blending points before and after the main flowmeter.
The process flow is a ratio of the net (combined) flow (0 to 80% range).
Displayed Information
The front panel display shows the current values of the input variables and
the results of the calculations.
The instrument can be supplied with a real-time clock for storage of up to
1000 transactions with time and date stamps.
Ratio%
P
flow
M
flow
-------------- 100

=
Ratio%
P
flow
Net
flow
------------------ 100

=