SMT Processing Workshop Specifications for Temperature and Humidity Control

Controlling the environment in the factory is a key measure to prevent defects on printed Circuit Boards (PCBs). Incorrectly managing humidity and temperature can damage expensive electronic components and lead to costly quality problems. Many factors affect the production environment, such as the location of the factory and the equipment used to manufacture the boards. Manufacturers must monitor and adjust temperature and relative humidities in the workshop, even in mild climates around the world.

Relative Humidity

Humidity in a room is determined by the “relative humidty” (Rh), which reflects a ratio
between the partial water vapor pressure and the saturated water vapour pressure at the same temperature. Relative humidity is the quantitative measurement of the amount water vapor present in the air.

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