Adjust the hygrometer if necessary. If your hygrometer shows a humidity lower or higher than 75 percent, you’ll need to calibrate it so that it’s accurate when you use it to check the humidity of your piano or instrument case. Read the hygrometer. If it’s accurate, it should show a humidity of exactly 75 percent.Ħ. Wait 6 hours. During this time the hygrometer will measure the humidity inside the bag.ĥ. Zip it up and place it somewhere out of the way, so it won’t be disturbed during the test.Ĥ.
Put the cap and the hygrometer inside the baggie. If you add too much, use paper towels to mop up the excess.ģ. Fill the cap with salt and add enough water to make a thick slurry.ĭon’t add so much water that the salt dissolves you just want it to be wet. Gather supplies. To test your hygrometer using salt, you just need a few household supplies.Ī tiny cup or bottle cap from a 20-ounce sodaĢ. This will allow you to see how well Music Sorb is working for you my explanation.
Once you have done the test, you can know how off your hygrometer is in total relative humidity percentage.
So tests have been created which anyone can do at home. Hygrometers are notoriously bad at measuring humidity.
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