Why constant temperature and humidity test chamber can not use tap water test?

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Why constant temperature and humidity test chamber can not use tap water test?

Constant temperature and humidity chamber as the name suggests is used for constant temperature and humidity testing, testing products in a constant temperature and humidity environment performance. The two core systems of the test chamber are the temperature system and the humidity system. Temperature system, high temperature using electric heating, low temperature using compressor refrigeration. Humidity system LINPIN with shallow water dish humidification, it has a fast humidification, stability, easy to clean and other advantages.

Constant temperature and humidity chamber is also required for water, requiring resistivity ≥ 500Ω.m or impurity content ≤ 20ppm of pure water. Meet the standard water with pure water, distilled water, deionized water, in general, we use to reach the standard reference to pure water can be. It should be noted that mineral water or tap water is not allowed, because mineral water and tap water contain minerals and other impurities.

So why should the constant temperature and humidity test chamber be tested with tap water? If the tap water can be used for experimental purposes, but the impurities in the water for a long time will be attached to the water tank, soft water pipes, shallow water tray and laboratory wall formation scale, shallow water tray and laboratory wall is also relatively clean, but clean water pipes and water tanks Very troublesome.

Therefore, the constant temperature and humidity chamber and other humidity system equipment, water selection is best to meet the specifications of the water quality, otherwise it will give follow-up use and cleaning and maintenance inconvenience.