Hydrometer calibration - help! Math idiot here

[debilorrah]

It is supposed to say 75%, it says 58%, so what do I WANT it to read if I want the bator at 40%???

 

[Fuzzy_Hat_Farm]

If it's supposed to be 75 but reads 58 then your readings are 17 too low so you need to add 17 to your reading to get the correct reading.

Sooooo for 40% your hygrometer will read 40-17 or 23%

my thermometer and hydrometer is off in both readings so I just put a sticker on it that reminds me how much to add/subtract for each.

 

[debilorrah]

Quote:
REALLY? I thought it would need to read 57%. I sooo totally do not understand this.

 

[Fuzzy_Hat_Farm]

This explains it really well. much clearer then I do.

and your right it should be 57! (I'm blonde)

http://exoticpets.about.com/od/herpresources/ss/hygrometer_7.htm

 

[debilorrah]

Quote:
Do you need a refill? let me blow in your ear.

I'm kidding, thanks!!!! PHEW!

 

[Fuzzy_Hat_Farm]

about now I think I need the air compressor!

I tried my first hatch ever in Feb and got 10 out of 40 eggs to hatch. Next hatch I watched every little reading, etc and only got 5 out of 36. Now I'm trying some shipped eggs from McMurray's and I've only got what looks like about 4 out of 20 developing.

I think I have a lot of loose air cells.

 

[debilorrah]

Quote:
Mine have been bad too but I know it is my hydrometer now!!!