Dairy Establishment Inspection Manual – Chapter 17 - Higher Heat Shorter Time (H.H.S.T.) Processing and Extended Shelf-Life (ESL) Dairy Products
1.17.13 Auxiliary Temperature Recorders/Controllers
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These instruments may be used in several locations on the H.H.S.T. processing system, to provide a record of start up pasteurization/sterilization and product processing temperature, and to provide temperature signals to the thermal limit controller unit or other processing controls.
1.17.13.01 General Conditions
The temperature recorder/controller unit shall be clean and in good mechanical condition. It should be moisture-proof under normal operating conditions. The chart positive drive mechanism shall be equipped with a system to prevent slippage and manual rotation (e.g. pin to puncture chart paper). It must also be equipped to produce a continuous permanent record of all pertinent information (i.e. time of day and temperature). The processor is responsible to indicate on the chart recorder the chart part number to be used. Pens should be operational and easily calibrated. The unit should be serviced at least once a year, and records of the servicing kept in the plant's file.
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