YES! It’s IMPORTANT!
Calibrate the thermometer/s you are using for your Incubator. I use 3 thermometers! You need to make sure your thermometer is reading correctly, Even one degree may cause serious problems with your hatch! A simple method without specialized instruments and knowledge is to compare your thermometer/hygrometer with other devices.
HOW TO CALIBRATION of thermometers:
Freezing point method.
Fill a glass with crushed ice. Add a LITTLE clean water until the glass is full and stir. Wait 3 minutes then insert the thermometer tip into the ice-filled glass so it’s in the water ice mixture. Wait a minute and if the thermometer reads 32 F then it’s accurate, and if it does not, it requires calibration.
Boiling point method.
Boil water in a pot, about 6” deep. When the water is at boiling point, place the thermometer into the water and make sure that the tip stays in the middle of the boiling pot, away from bottom and sides. Wait 30 seconds and check if the thermometer reads correctly at 212 degrees if you are at sea level or below 1,000 feet elevation. The boiling point of water varies for different elevations: sea level at 212 F, 1000 feet at 210 F, 2000 feet at 208 F, 3000 feet at 206.4 F, 5000 feet at 202.75 F, and 8,000 feet at 197.5 F. The thermometer needs calibration if the reading is incorrect. Boiling Point Calculator CLICK HERE
Calibrate the Digital Thermometer
Adjust the nut of the digital thermometer in order to correct the temperature. This is done by simply turning the adjuster until the correct reading is reached. Digital thermometers do not require any adjustment of a screw or nut. You simply need to locate the reset button. When the freezing point or boiling point of water is achieved, simply push the button and that’s it. Some digital thermometers may require you to push hold the reset button.
CALIBRATION EASY WAY
What To Do If Your Thermometer Is Inaccurate
When testing a thermometer for accuracy, all you're trying to do is make sure that your unit is not grossly out of whack. You should be worried about being off by +/-20°F, not +/-2°F. If your testing shows that your thermometer is off by only a few degrees, don't do anything—just take those few degrees into account when reading your thermometer. It should be noted that even high-quality, industrial-grade thermometers are only accurate to +/-1% of their scale. This means that at a standard 212°F boiling point, these thermometers may read as much as 2°F above or below the actual temperature and still be within manufacturing specifications. Bottom line: Don't sweat your thermometer being off by a few degrees!
If your thermometer is off by +/-5°F or more, you may want to consider replacing it with a higher quality model. S
Inexpensive thermometers typically cannot be recalibrated if found to be inaccurate, but more expensive units may be recalibrated by the manufacturer and in some cases by the user. Consult the instructions that came with your thermometer for details.
More information on Calibrating your thermometer/hygrometer:http://www.hermitcrabassociation.com/pages/calibrate.html
picture to illustrate why we calibrate.
I also will be investing in a thermometer with tenths digits to compare to my thermostat.