How do you Calibrate A Hygrometer

[Axle Quails]

How do you do it ?

 

[cmom]

Here is a great link on calibrating a hygrometer.
http://exoticpets.about.com/od/herpresources/ss/hygrometer.htm

 

[Stacykins]

Easy!

All you need is water, a large bottle cap or something similar that can stand getting wet, salt, and a plastic baggie that seals.

Fill the cap with plain table salt, NaCl. Use water to dampen the salt. You don't want to soak it so it is fluid, or dry and clumpy, just evenly damp. If you use too much water just pour off excess out of the cap and maybe add a bit more salt. Then, seal the cap of wet salt and the hygrometer in the plastic baggie and wait for 8-10 hours. If the hygrometer is spot on, it should read 75%. If it reads 72%, for example, then it is off 3%, and you know that the specific hygrometer is +/- approximately 3%. Makes it MUCH easier to figure out humidity.

 

[Axle Quails]

Thanks

 

[Axle Quails]

Quote:
i filled it with water and drained it and it just sitting their without moving - it looks like wet sand

 

[Stacykins]

Yep, wet sand dampness is pretty much how it should be!

 

[Axle Quails]

it hasnt gone well

it saying 90% and it been 15 hours

what do i do ?

 

[Stacykins]

Quote:
Might have use too much water, if it is over saturated it could skew the humidity, push it too high. Maybe try again, use less water, and see if the results change.

 

[Axle Quails]

okay