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Re: Hygrometers

Author: Luuk ★2017
Date: 2021-02-25 20:03

You can check and adjust a hygrometer in the following way:
- wrap it in a really humid cloth (not dripping, but almost) and leave it for some hours. It should read about 98-100%. Use this reading for adjusting the offset.
- put plenty of salt (just the houshold type) in a jar or pot, add water so it gets really wet (half a cup of salt plus a quarter cup of water). Put the hygrometer above the wet salt (f.i. by means of a small plastic block put in the middle) and close the lid, airtight (alternatively put all in a sealed plastic bag). Leave it overnight. It should read 75%. Use this reading for adjusting the range.

Regards,

Luuk
Philips Symphonic Band
The Netherlands

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