There's a common belief that temperature calibration isn't possible in digital devices. It is a sane belief but still, there's a working logic for this operation. When you enter a desired value to calibrate the device, the internal temperature of the thermistor is manipulated accordingly. This is exactly how it works. Following are top 10 tips on temperature calibration.
1. Select the best thermistor
The Platinum Resistance Thermometer is the most accurate thermistor known to the developers at present. The readings are accurate up to a few decimal places if measured digitally. If you aren't familiar with transducers, then you can go with the analog display. The readings on the scales are accurate too.
2. Avoid usage of fluid chemicals
Try to stick to the dry-well; as the name suggests, it is dry and almost 0% moisture is present. Calibration bath is physically unpleasant as it contains viscous fluids. A dry-well is an excellent way to deal with messy fluids.
3. Keep an extra thermometer
It is recommended that you carry two or more thermometers to minimize the reading errors. Read a number of thermal devices at once and tally the readings. If the readings differ a little, consider the average.
4. Use a thermal source
While calibrating the device, make use of an external thermal source to provide heat to the device.For instance, if you wish to reduce the temperature by two degrees; then make contact of an external source to reduce the temperature by two degrees. Similarly, operate the thermal device to increase the heat. The thermal source must be digital and should be accurate up to at least two decimal places. Digital devices are always convenient.