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Reliable Recorder for Medical Sterilization Processes

This recorder is designed to monitor sterilization processes in medical settings. It documents critical parameters such as cavity temperature (T1), internal pressure (P), and optionally, product temperature (T2). Operated via a PLC, it facilitates an automatic start and stop of recording based on sterilization sequences. Featuring a 2 or 3-pen configuration with an easy-to-read analogue display, it captures data efficiently and is built with a print inhibit function for precise documentation. The chart provides clear batch records for compliance with local regulations.

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Reliable Recorder for Medical Sterilization Processes

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  1. APPLICATION NOTE " MEDICAL STERILIZERS " APPLICATION To kill bacteria , the products to be sterilized are placed into a temperature chamber at 121 Deg C , for a specified time . A recorder is used to document that sterilzation was accomplished according to the local regulations. CUSTOMER NEEDS . Need to record the process temperature of the cavity ( T1 ) , the internal ? pressure ( P ) , and optionally the inside temperature of the load ( T2 ) in the sterilizer . The Sterilization sequence ?is made by the PLC of the autoclave ? A contact signals the Start ?, and the End ? of the sterilization sequence ? The recorded batch chart must be ? filed ? after each operation ? This record must be documented and ? proof ?the good process operation ? The price of the recorder must be as low as possible ? P L C P L C D1 T 2 T 1 P Cavity LOAD

  2. HONEYWELL Solution : The pen recorder with minor modifications can meet the customer needs . DPR 100 A Product description : Recorder 2 or 3 pen ? Analogue display ? Unit is delivered from the factory with the following configuration : ? Channel 1 ( P ) = Pressure inside the a utoclave . Input 1 = 4 to 20 mA Scale 1 = - 1 , 0 , +4 Bars . Channel 2 = Temperature of the cavity Input 2 ( T1 ) = 50 to 150 Deg C Pt 100 Scale2 = 50 to 150 Deg C . Channel 3 = Temperature of the product ( insert probe ) : Optional nput 3 ( T2 ) = 50 to 150 Deg C Pt 100 I Scale 3 = 50 to 150 Deg C . 2 Digital input contacts ( see here below ) . No alarm output . Chart 0 to 100 linear , 100 divisions . Chart fan fold Special function ( ST ) The unit should be built with a special Print inhibit ? function as following : The digital input contact 1 makes this operation : At contact closure : ? - Start immediately the recorder in operation without making the chart references ( at the preconfigured chart speed ) - The unit prints : Date , Time , Chart speed , and recorder address . Then the unit records the process variables ? At contact opening : ? - The unit prints time - Continue to print the PV抯 until the memory buffer is emptied , but stop the aquisitions - T hen makes a fast chart advance of 50 to 60 mm - Then , stops the recording . ( ready to cut the chart )

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