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Cover story  ADVERTISEMENT FEATURE


PRESSURE MONITORING APPLICATIONS


Fire extinguishing systems remote monitoring


Accurately monitoring and measuring the water pressure is critical in any fire extinguishing system. Effective firefighting relies on the right pressure being available in the extinguishing water pipes. The pipelines undergo extensive pressure testing following installation and routine pressure monitoring during maintenance. WIKA collaborated with one of its customers to find a solution for pressure monitoring on a tunnel fire extinguishing system. WIKA proposed the WIKA CPG1500 precision digital pressure gauge for monitoring the pressure remotely using a smart phone.


The application was to remotely monitor water pressure in the fire extinguishing system and ensure a leak tight system using a pressure profile captured by the CPG1500. The gauges were mounted in a circular pipe beneath the tunnel ceiling. The stability of the measured values within a specified tolerance limit were used to monitor any potential leaks in the system.


Using the CPG1500 as a solution the


operators saved a significant amount of time avoiding using cranes or ladders to check the pressure for routine maintenance or identifying potential leaks in the system. By simply connecting to the different CPG1500 gauges and downloading the pressure profiles, any leaks in the system could be identified quicker introducing a significant cost saving to the business from the reduced routine maintenance cycle time.


Pressure monitoring in the pharmaceutical industry


The CPG1500 digital gauge can have many applications for pressure monitoring in the pharmaceutical industry.


A good example of this is an application where the solution provided was using the digital pressure gauge, with the smartphone app to monitor the nitrogen pressure between the lining of the inner and the external walls of the tank during transport. A nitrogen filled chamber at a specified pressure is used as an isolator between the inner and outer walls of the tank. The nitrogen stops any product leakage from the storage tanks in the case of any leaks during transport.


The digital pressure gauge precision and sensitivity is crucial for those type of applications. The product storage tanks in the pharmaceutical industry need to be stored under very controlled process parameters. Those conditions need to be monitored


Instrumentation Monthly October 2020


Bluetooth/wireless communication using the CPG1500 digital gauge can be used for many applications where the signal transmission between the two Bluetooth interfaces is between 5-10 meters. This makes it ideal for pressure/temperature monitoring in many industrial and process applications. The benefit in cost and time saving for any business makes this technology very attractive. In the future remote monitoring technologies will be able to cover a wider range of applications across all industries as they continue to evolve and improve. One thing we know for sure is that Bluetooth wireless technologies are going to continue to play a huge part in the revolution in remote monitoring applications in the future.


WIKA www.wika.co.uk


during the transport or transfer of any of the tanks during the production process. With an accuracy up to 0.025% FS, the CPG1500 digital gauges can capture the smallest pressure changes immediately. The digital pressure gauge also measures and logs temperature values as an additional parameter. This temperature value in the CPG1500 is a combination of the medium temperature, ambient temperature and self-heating utilising the reading from the IC on the electronic board of the CPG1500. This is ideal for use in applications where a temperature indication is required with pressure monitoring.


The min / max function of the pressure


measuring instrumentation is another function that is used widely for critical process monitoring. In this pharmaceutical application, the CPG1500 min / max function is used to monitor the minimum pressure of the nitrogen in a chamber between the two tank wall linings. An alarm for the nitrogen minimum pressure value is set by the operator so in the case of a pressure drop, the digital pressure gauge trips an acoustic signal on the operator’s smartphone. This allows the operator to quickly shut down the process and perform the necessary troubleshooting and maintenance if required.


pressure and temperature cycles over a long period while the medium is at rest. A suitable battery life and data storage capacity is often required for such applications. The CPG1500 data logger can store up to 1.6 million data points and the battery has a minimum service life of 2,500 hours. The data transmission via Bluetooth


provides a very secure local connection. In case of connection drop, the faults are indicated instantly and the operator can reconnect again in seconds. All measurements recorded in the meantime can still be retrieved from the data logger memory directly using the smartphone ensuring no data loss in this case.


SUMMARY


The CPG1500 data logger is used to plot a pressure and temperature profile that is checked throughout the different stages of the tanks transport process. When the tanks are transferred to the next production station, the operator will have easy access to a pressure profile that highlights pressure spikes or temperature using their smartphone. The logged pressure and temperature


profiles are utilised also for quality control purposes at the end of the production process. This involves recording the


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