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What is the salt test? Is that just for humidity? How can you be sure its accurate? I am a chef by trade. We use thermometers all day long. We calibrate with water and ice. Im confused. My culinary thermo reads 99 but the digital reads 94. But I know....that my thermo is calibrated. I dont want to cook my eggs. it is a 5 degree difference.
The salt test only test if your humidity reads right. But it is 1/2 cup salt to a 1/4 cup water in a coffee mug. Mix it till it looks like wet sand then put it in a one gallon zip loc bag. Place your hygrometer in the bag but make sure the salt mixture won't spill. Seal the bag and check it in 8 hours. Your humidity reading should be 75%. Mine was 74%, so I add 1% to what my display says. As far as the thermometer... I'm just trusting the 24 hour recorded high/low averaged to one reading. Hope it works.
Thankyou for the tip on the salt test. In our case we are trusting our other 4 thermos. 2 culinary thermos and 2 that came with the inc and turner. These four are within one degree of each other. The digital was 5-7 degrees off. So I am going to trust old school. I will let you know how the humidity test goes...