In what weather can the damp-proof pipe of piano be opened?

The opening time of piano damp-proof pipe in supermarket weather is determined by humidity;

1, when the humidity is more than 65%, it can be turned on for 24 hours. Its function is to protect against moisture at low temperature.

2. When the humidity is less than 65%, it needs to be turned off.

Extended data:

Piano (Italian: pianoforte) is a keyboard instrument in western classical music and has the reputation of "the king of musical instruments". It consists of 88 keys (52 white keys and 36 black keys) and a metal chord board. Italian Bartolomeo Christopher (1655- 173 1)? [1] The piano was invented in 1709.

The range of the piano ranges from A0(27.5Hz) to C8(4 186Hz), covering almost all the musical tones in the music system, and it is the instrument with the widest range except the organ. Piano is widely used in solo, ensemble, accompaniment and other performances, and it is very convenient to compose and rehearse music. By pressing the keys on the keyboard, the player affects the hammer wrapped in felt inside the piano, and then hits the steel wire string to make a sound. This piano needs regular maintenance to keep its tone unchanged.

References:

Baidu encyclopedia-piano