Measurement of the temperature of refrigerated food center, - 18 ℃ is the key

In the refrigerated and frozen food production, logistics and consumption of the whole economic chain, temperature for food safety and hygiene plays a vital role. In general, when the temperature below the normal storage temperature 10 ℃, the food inside the chemical and biochemical reaction rate would be reduced from 2 to 3 times. In other words, when the temperature is low enough, the food inside the microorganisms such as bacteria will not continue to breed, for some bacteria, above freezing temperature is enough to organize the process, and for some other bacteria. In - 18 ℃ storage environment, those that existed before the frozen bacteria are still alive, but in the low temperature dormancy state, thus reduced metabolic activity, very low reproductive capacity or no longer reproduce. When a constant temperature in - The 18 ℃, through rapid low temperature processing of quick-frozen food can be stored for months without quality sex change. The length of the best shelf life, depending on the types of food. But in any case, a constant - 18 ℃ is a prerequisite. Standard GB8863 - 1988 'regulations of technology of quick-frozen food, quick-frozen food should be frozen to immediately - after cooling 18℃； Indoor temperature should be kept in cold storage - storage 18 ℃ or less ( Depending on different products) ； Compartments of the body must remain - transport products 18 ℃ or lower temperature; Retail to stay - after low temperature display case were mentioned 15 ℃, should be equipped with air-conditioner contained in the thermometer. The requirements of the thermometer food center? When measuring the internal temperatures of products, probe for stainless steel and a pointed tail vein, sheath maerial of total length should be around 15 cm. Delta, bimetallic thermometer in cold storage, frozen food, the application of how to measure the internal temperature of the frozen food? Should be in the center of the largest surface 2 below. 5 cm measurement, when the product ( Or packaging products) Have a side of the thickness is less than 5 cm, measurement point should be in the middle of the thickness. Inside the refrigerator: if the case is closely heap together, should measure the outside of the box on the outside of the package and this lot of goods case at the centre of the internal temperature. They respectively called external temperature and center temperature of this batch of products. The differences as a temperature gradient of this batch of goods, must carry on the measurement for many times, reliable data to book cargo temperature conditions. Refrigerated trucks or refrigerated container: a. Transport all to measure close to the edge of the gate in the upper and lower temperature of the product; b。 Unloading all to measure close to the edge of the gate when the upper and lower temperature of the product; After the Angle in the upper part of the product ( As far as possible from the cooling equipment is the most distant) Temperature; The center of the cargo stack temperature; Goods of the center of the upper surface ( As far as possible from the cooling equipment is the most distant) Temperature; Cargo pile on the surface of the upper edges ( As far as possible from the cooling equipment is the most distant) The temperature. Other points to measure temperature, be determined by check head. Low temperature display rack, at least from the top of the ark, cabinet and the bottom of the tank in the middle of each test. Temperature, low temperature display case in defrosting, should be indicated in the test record.