You can restore the accuracy of most bimetal thermometers by adjusting them, known as calibration.
Make sure the sensory area is submerged and does not touch the sides of the container. Wait 30 seconds or until the reading remains the same. ADJUST THE THERMOMETER TO 0 ° C. Hold the calibration nut firmly with a wrench or other tool and rotate the thermometer head until it reads 0 ° C.The question then is how to increase the accuracy of a bimetallic thermometer. Use of thermometers to improve the accuracy of HACCP program standards
- Mix a container filled with crushed ice and water.
- Push the BiTherm thermometer rod through the lock hole until the adjusting nut snaps under the disc head.
Clinical thermometers and many electronic thermometers can usually be read at 0.1 ° C. Special instruments can show up to one thousandth of a degree. However, this accuracy does not mean that the reading is true or accurate, only that very small changes can be observed.
The first step is to relate the measured values of the measuring equipment to the values of the calibrated measuring standards. It is the critical link between calibration and traceability that is widely understood.
Fill a tall glass with ice cubes and add cold water. Immerse the thermometer in ice water for 30 seconds without touching the sides or bottom of the glass. If the thermometer is a thermometer, it takes 12 minutes to calibrate the temperature.
The ice point method is the most common way to calibrate a thermometer.
If a thermometer falls, you will need to calibrate it. If a thermometer has a temperature range (from freezing to boiling), it also needs to be calibrated more frequently. Whenever you invest in a new thermometer, be sure to calibrate it before using it.
It is also recommended that you calibrate a thermometer if you are using it to measure extreme temperatures. Measuring very hot and very cold objects can lead to small errors the next time you test. Finally, thermometers should be calibrated regularly (daily or weekly) if used frequently.
Bimetal Oven Thermometer:
Work with your suppliers to define specific safety and quality criteria for the food you normally receive. Lower foods if they have any of the following problems. Appearance Eliminate stale or unusually colored food. Even wet food, if it must be dry, such as salami, must be discarded.
The saturation temperature indicates the boiling point. The saturation temperature is the temperature of a corresponding saturation pressure at which a liquid boils in the vapor phase. We can say that the liquid is saturated with thermal energy.
Insert the thermometer or probe into the ice water so that the sensory area is completely submerged. Wait 30 seconds or until the display stops. 3. Hold the calibration nut with a wrench or other tool and rotate the thermometer head until it reads 32 F (0 C).
When selecting and using this type of thermometer, keep in mind the following: an adjustable calibration nut • easy-to-read temperature markings • a hole that marks the end of the sensor range. Digital thermometers measure through a metal strip or sensory area and emit a digital reading.
40 ° F 140 ° F
A bimetallic strip is made up of two strips made up of two different metals. Metals expand when heated and different metals expand at different rates when heated. When the chilled water temperature rises slightly, there is a net expansion of up to 4 ° C.