The SCADA system offers a wide range of technical features as follows:
Specialized Version Specialized version is developed according to the requirements of 21 CFR Part 11 (document from US Food and Drugs Administration). Software development is based on ARC Informative PC for industrial development packages.
The software provides the following functions:
- Data visualization in the graphical and table forms (on-line or historical data).
- Indication of the status of fermenter & bioreactor elements.
- can be exported in ASCII format for other applications.
- Off-line data adding & the control of executive devices.
- Adjusting of Set Points and other control parameters.
- Storage and display of alarms & report of all alarms, including the times of alarm appearance, acknowledgment and prevention.
- The report of operator actions, where are fixed the times of login/logout, setpoint changes, setting on/off executive devices, start/stop of process, etc.
- Access to operations is allowed only for authorized users.
- The access level of every operator is defined through passwords.
SCADA stands for Supervisory Control and Data Acquisition.
It is a system of Software and Hardware elements that allows the industrial organization to control fermenter and bioreactor processes locally or at remote locations. Monitor, gather, and process real-time data. Directly interact with devices such as sensors, valves, pumps, motors, and more through a human-machine interface known as HMI software. Record events into a log file. It is a control system architecture comprising computers, networked data communications, and graphical user interfaces (GUI) for high-level process supervisory management, while also comprising other peripheral devices like programmable logic controllers (PLC) and discrete proportional-integral-derivative (PID) controllers to interface with process plant or machinery. The use of SCADA has been considered also for management and operations of project-driven-process in the construction
The developed automated system for monitoring and process control. SCADA software is implemented on the basis of:
- Programmable logical controllers.
- The control panel has been designed with a color touch-screen monitor which is used for monitoring and management of the installation by the operator or automatically by the SCADA software. The developed SCADA system is working in real-time.
The main tasks are:
- Loading of input data and parameters of the technology process.
- Data transfer of information between the devices, PLC, and industrial computer via Ethernet and remote control via internet.
- Data archive in normal and emergency mode.
If we reuse the pH buffer solution it leads to slow responding pH probe performance. That is why we always use fresh, unused, unexpired pH buffers for calibration. Once we use the buffer solutions they are assumed to be contaminated and should not be suitable for pH calibration.
If we don’t calibrate the pH meter properly then there is no way to determine the pH value of the solution you are testing. Accurate pH measurements cannot be accomplished with a pH meter unless it has been calibrated against a standardized buffer.
We use the following methods to calibrate the pH
- Rinse the electrode with the deionized water and blot dry using a piece of tissue (Shur Wipes or Kim wipes are available in the labs).
- Place the electrode in the solution of pH 7 buffer.
- Allow the display to stabilize and then set the display to read 7.
- Follow the above steps 3-4 times to check the accuracy.
