Hi. I'm hoping someone can help with this.
After having a very difficult hatch (3/24) with a new Farm Innovators model, I used the advice here and calibrated my accurite digital hygrometer/thermometer, as well as a submersible glass bulb for temp - calibrated by the ice method. The accurite was off by 4 degrees (reading low) after the salt test and the separate thermometer was reading 2 degrees high.
I now am calibrating both of those to the new incubator's digital hygrometer/thermometer. These are my findings:
The glass thermometer( factoring for -2deg) and the incubator thermometer are pretty much spot on. The Accurite temp is close, however it took 3 hours to read that temp.
The problem is the hygrometer.
The Accurite hygrometer (factoring the +4) and the incubator hygrometer differ by 16 degrees.
Can this even be possible? What the heck?
If so, it is no wonder that my last hatch was so pitiful. The incubator hygrometer is reading 16 degrees low, which would mean that at lockdown, when I had it all the way up to peak of 75, it was actually at 91 pct humidity. Basically soaking wet. UGH. And throughout the first 17 days, when I thought my humidity was 40-55 (too high, I know), it was actually 56-71 pct.
I just want to verify with you that are experienced in calibration that this is first, possible, and second, that I have taken accurate steps to correct the readings.
Thank you in advance for your help.
so you have done the bag salt method on the hygros?
Yes, I did. Twice with the acurite hygrometer and twice with the incubator. Incubator is still 16% off. I have since ordered two analog hygros. They should be here tomorrow. The second time I did the salt test with the acurite, I put in a brand new battery. It read 5% low that time as oppossed to 4 low first time. I am thinking of emailing the Farm Innovators company and asking for either 1 a new incubator or 2 a professionally calibrated replacement hygrometer. I just don't think that they should be able to sell these for incubation when the percents are 16 off, knowing that those using them will never get a decent hatch rate.
Edited by JillZ - 3/16/16 at 11:10am