This application is about a very specific data acquisition project. One of the its customers is running a tar sand refinery and uses a special 3 way switching valve in order to control the tar sand flow into the different coking towers. In the past the operation of the valve was not always torque transducer and caused very costly shutdowns of the refining process.
In order to monitor the correct operation of valve the customers decided to install a Delphin TopMessage data logger to record all data during the valve movement. A TopMessage data logger with an 8 channels ADFT module with synchronously fast sampling analog inputs was selected. The system measures the 3 phase engine current consumption, voltage. The strain sensor measures force and torque during the movement of the valve. The analog inputs are configured for 1 kHz sample rate each.
The installed sensors are:
1 x Strain gauge for torque measurement
3 x Motor current probes
1 x Motor voltage transducers
2 control circuit voltage transducer
The TopMessage data logging system is installed in an explosion proof box in the EX zone close to the valve control unit. The data transfer is realised through a wireless Ethernet radio.
The internal logic channels of the TopMessage are configured in a way so that the data storage is activated on certain threshold levels of engine current consumption. This in build logic functions allows the user to configure the TopMessage device with event based logging functions.
After the valve has finished its move an event trigger automatically downloads the data from the logger via the wireless Ethernet network to a PC in the central control room for data analysis and post processing with the ProfiSignal Basic software.
The TopMessage data logger is recording all data of each valve movement. The DataService Scheduler is automatically transferring the data to a central PC for data analysis. The data analysis and post treatment is performed with ProfiSignal Basic software. The customer is specifically interested in the engine current consumption and the strain/torque profile during the valve movement. The strain/torque profile and the current consumption give a clear indication if the value is working correctly and if any maintenance action should be scheduled.
Summary / Benefits:
The Logegr has a small dimension which makes the unit ideal for installations in explosion proof boxes with limited space
The TopMessage data logger is logging all 7 channels at 1 KHz sample synchronously straight into the 1GB internal logger memory
The internal logic channels ensure that only relevant data during the valve movement is logged
The scheduler function of the Datservice Configurator software is automatically downloading the data to a PC over the WALN Network
Post processing of Data files to calculate RMS values over current is performed with the ProfiSignal Pasic Software
The customer has an easy monitoring system to check valve status and schedule preventive maintenance actions before valve operation fails
For more information please see: Riveja [http://www.riveja.lt]
Director of Riveja
Company Riveja specializes in test and measurement systems and equipments for industrial use. We design and manufacture customized test and measurement systems. Our services include automation design, manufacturing and commissioning. Riveja’s measurement solutions are mainly used in product development, research and maintenance.