These may help.
Calibrate a Thermometer
http://www.allfoodbusiness.com/calibrating_thermometers.php
Rebels Thermometer Calibration
http://cmfarm.us/ThermometerCalibration.html
Rebels Hygrometer Calibration
http://cmfarm.us/HygrometerCalibration.html
Calibrate a Thermometer
http://www.allfoodbusiness.com/calibrating_thermometers.php
Rebels Thermometer Calibration
http://cmfarm.us/ThermometerCalibration.html
Rebels Hygrometer Calibration
http://cmfarm.us/HygrometerCalibration.html