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For quick-serve restaurants it is essential that their guests can count on high quality products. To assure high-quality the proper storage of ingredients at the required temperature level is essential.
To improve the existing control system and to comply with HACCP and other regulations, the biggest quick-serve group in Greece named Goody's - Estiatoria Eukarpias S.A. decided to install a Wireless Sensor Network in one of their subsidiaries.
Using E-Senza's SenzaNET wireless device network protocol offers an economical, easily configured solution to guarantee automatic and permanent condition monitoring, thus enhancing the organization's ability to maximize the quality of their product.
Goody's has to work within the guidelines of HACCP regulations, which require archival of all temperature data for a period of one year. To ensure consistent high quality products they were searching for a solution to monitor the temperature in their existing cold rooms more reliable, efficient and convenient compared to the previous wired data logging system solution, which has not always functioned properly. In addition to temperature also the status of the cold room doors should be monitored for open or closed conditions.
The target was to improve the existing system and to make it clearer and more attractive to use. Two main issues needed to be addressed; first, data export to allow for long-term archival and to enable better visualization, and second notification via SMS when set-points were exceeded and alarm conditions triggered.
Goody's was searching for a wireless solution because the available space for cabling was too tight and the customer did not want any structural modifications in the operating kitchen. They felt very confident with E-Senza's products and the local partner BitLogic Industrial Automation in Greece.
Each cold room is now equipped with one or more SenzaBlocks with thermistor sensors for temperature monitoring, a digital input SenzaBlock for monitoring the status of the door and an Ethernet Gateway with output interfaces in combination with a GSM modem.
The wireless nodes sent every 10 minutes the measured values to the gateway, which collect the data and transmit it to the monitoring software. If the temperature is exceeded over a period of one hour or the cold room door is open longer than 30 minutes an SMS alarm will be generated and send to the manager of the restaurant.
The battery powered wireless sensor nodes and adapters are very flexible, easy to deploy and reconnect automatically to the network in the unlikely event of an interruption in connectivity. All data is stored in the node temporally in case of failure in communication. The data is collected and sent over the self-organizing wireless network SenzaNET to the gateway with GSM connectivity, which initiates a TCP/IP connection to a central server. The network configures by itself and there is just one SIM card necessary in the gateway for the whole network.
The existing network is easily extendable to 32 nodes if further measuring points are needed in future.
As a result of deploying the wireless network solution of E-Senza, Goody's has realized a number of improvement benefits.
It increased the efficiency of its organization by reducing the time it takes to monitor temperature. All relevant data are displayed in real-time and stored automatically for one year in compliance with HACCP regulations.
Now Goody's can guarantee a 24 hour monitoring and at the same time minimize manual efforts and human errors.
Due to a problem with the refrigeration motor till now one alarm was generated and disturbances could be recognized in time and appropriate counteractive measures were introduced.
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Last Updated on Thursday, 27 January 2011 14:41