Why can't the constant temperature and humidity Test Chamber use tap water test?

The constant temperature and Humidity Chamber, as the name suggests, is used for constant temperature and humidity tests to test the performance of products in an environment of constant temperature and humidity. The two core systems of the Test Chamber are the temperature system and the humidity system. Temperature system, electric heating is used for high temperature, and compressor refrigeration is used for low temperature. LINPIN humidification system has shallow water dish humidification function, which has the advantages of fast humidification, stability, and easy cleaning.

Water also requires a constant temperature and Humidity Chamber, requiring pure water with a resistivity ≥ 500Ω.m or an impurity content ≤ 20ppm. Water that meets the standard can be purified water, distilled water, deionized water, generally speaking, we can use pure water that meets the standard. 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 use tap water to test the constant temperature and Humidity Chamber? If tap water can be used for experimental purposes, but the impurities in the water will adhere to the Water Tank, soft water pipe, shallow water tray and laboratory wall for a long time to form scale, the shallow water tray and laboratory wall are also relatively clean, but the water pipe and Water Tank are very clean trouble.

Therefore, in constant temperature and Humidity Chambers and other humidity system equipment, the selection of water should better meet the water quality specifications, otherwise it will cause inconvenience to subsequent use, cleaning and maintenance.