Contrec 515 BR03, Руководство по эксплуатации

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Operation
515 BR03 - 15 August 2021 33
Batch Operation
Operation Configurations
For batch control this instrument can be used in various configurations:
Typical Single Stage Batching Configuration
Typical Dual Stage Batching Configuration
Flow Control & 1 Relay The Hold Output feature can be used in this
configuration to provide a faster return to
the desired flowrate when the next batch is
started.
The analog flow control output can be used
to operate either a proportional control valve
or a variable speed drive.
Main Flow
Proportional
Control Valve
Frequency
Input 1
Process Flow
Flowmeters
Analog
Output 1
Frequency
Input 2
Example of
Batch/Blend-1
Configuration
Relay 1
On-Off
Valve
Net Flow
2-Stage Relay Control The batch controller can also be used in a
conventional dual stage configuration.
Parameters for slow start and prestop points
are provided to control the operation of
Relay 2.
A digital output can be programmed as a
pump control signal if required.
Main Flow
Proportional
Control Valve
Frequency
Input 1
Process Flow
Flowmeters
Analog
Output 1
Frequency
Input 2
Relay 2
Net
Flow
Example of
dual stage
batching
Relay 1
Main Flow
Control
Valves
Bleed Flow