Calibrating Hygrometer

[Hocky27]

Hi All,

My hygrometer finally arrived so it's time to get it calibrated for the imminent arrival of cigars. Is it completely necessary to use distilled water for the calibration process ?

I didn't have any last night so instead I used tap water but this morning I am finding I'm not getting the reading of 75% I should be. Instead it's coming out around 69%. 

Happy to go and buy a bottle today but just wanted to check. 

Thanks. 

[PigFish]

If you are using aqueous salts, yes it is important that the salt is a pure salt and the water is as pure as you can find it...

-Piggy

[BarryNY]

On 8/14/2017 at 5:51 PM, Hocky27 said:

Hi All,

My hygrometer finally arrived so it's time to get it calibrated for the imminent arrival of cigars. Is it completely necessary to use distilled water for the calibration process ?

I didn't have any last night so instead I used tap water but this morning I am finding I'm not getting the reading of 75% I should be. Instead it's coming out around 69%. 

Happy to go and buy a bottle today but just wanted to check. 

Thanks. 

Best way to calibrate is to get a Boveda pack with a stated RH% close to what you will be looking to keep your cigars at.  I keep about four 65%RH packs in a double ziplock bag just for routinely calibrating my hygrometers and wireless sensors.