An instrument is a system (such as a controller or indicator) that receives an input signal, representing a physical parameter such as the pressure or temperature, and converts the signal into a number or point on a graph.
Pressure Instruments and Sensors from Dynisco
For more than 60 years Dynisco has been producing pressure instruments and sensors for the injection molding and extrusion molding industries. Dynisco’s systems are designed for use in process monitoring, control and safety.
When choosing a pressure control or monitoring system Dynisco would suggest using localized controllers and indicators to work alongside their precision sensors. This article will explore the additional benefits that localized controllers can provide.
During both injection and extrusion molding the build-up of pressure should be closely monitored. The over pressure condition will lead to equipment failures, which cause interruption in production, and increases the chance for operator injury.
Sensors and instrumentation from Dynisco can be used for a safety lockout system that will shut off power to the entire system should overpressure conditions occur. The pressure sensor and the instrumentation work in tandem meaning they should be calibrated together and kept together as a working pair.
The pressure range for each sensor is set depending on the application requirements and the product being manufactured. Instruments produced by Dynisco are application specific and are direct predecessors of their legacy product ranges.
Control and Indication Devices
Dynisco can provide control and indication devices which can work with universal signal inputs from standard temperature and pressure sensors. These systems allow users to observe process parameters at a local level, send signals to control systems and to set alert thresholds for warning systems or for system shut down.
Dynisco’s ¼ din systems (ATC990 and UPR900) provide advanced features to improve user interaction, including:
- A simple to use Setup Wizard
- Easy to read LCD display with LED backlight for alarms (green/red)
- Graphical display of processes, events and alarms
- Read-out of pressure, temperature and differential pressure
- Data logging possible for process values, alarms and set points in .csv format for spreadsheet applications
- Data transfer possible via USB, or through Modbus RS-485 and Modbus TCP Ethernet
- Ability to add second input/output channel to make the instrument more cost-effective
- Sending of analog signals to other devices possible
- Can be configured locally or remotely using a Modbus RTU
- Optional software for blue control configuration and commissioning
The trend view allows the user to easily visualize changes in process variables in the form of a line graphic. Everything is displayed on an easily legible LCD display, which changes color at alarm conditions to ensure this is noted by the user.
Set-Up Wizard: A User-Friendly Tool
The set-up wizard is a user-friendly tool that steers the operator through the parameter assignment process when the system is turned on. The instrument’s data logging system allows the operator to save key parameters, which can be set for other instruments too, via the USB flash drive in .csv format for analysis using spreadsheet software.
Communication is via a Modbus protocol (RS485) or TCP Ethernet, with analog retransmission of signals to higher systems possible using amplified outputs at 0-5V, 0-10V, or 4-20mA.
The configuration of instruments can be saved and downloaded, simulations can be ran, and collection of .csv files from data logger is possible using the (optional) blue control software.
The line graph displayed below demonstrates the data that can be collected using the data logging mode of the ATC990 or the UPR900:
The line graph below is an example of the data that can be captured with the data logging feature of the UPR900 or ATC990
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Conclusion
Controllers and indicators provided by Dynisco provide a high level of dependability, simple and fast set up and an intuitive interface for use in any application.
This information has been sourced, reviewed and adapted from materials provided by Dynisco.
For more information on this source, please visit Dynisco.