Measurement of temperature with an infrared temperature probe
Infrared thermometer consists of optical system, photoelectric detector, signal amplifier and signal processing. It consists of display output and other parts. The optical system gathers the infrared radiation energy of the target within its field of view. The infrared energy is focused on the photodetector and converted into a corresponding electrical signal. The signal is then converted into the temperature value of the measured target.
1. How to measure temperature with an infrared thermometer. The following are three temperature measurement technologies of non-contact thermometers:
(1) Point measurement: Determine the entire surface temperature of an object, such as an engine or other equipment
(2) Temperature difference measurement: Compare the measured temperature of two independent points, like a connector or circuit breaker
(3) Scanning measurement: detect target changes in a wide area or continuous area. Like refrigeration lines or electrical distribution rooms.
2. Main considerations when choosing an infrared thermometer
(1) Temperature range: Each model of thermometer has its specific temperature measurement range. The temperature range of the selected instrument should match the temperature range of the specific application.
(2) Target size: When measuring temperature, the target to be measured should be larger than the field of view of the thermometer, otherwise there will be errors in the measurement. It is recommended that the size of the measured target exceeds 50% of the field of view of the thermometer.
(3) Optical resolution (D:S): that is, the ratio of the diameter of the thermometer probe to the target. If the thermometer is far from the target and the target is small, a high-resolution thermometer should be selected.
3. Temperature measurement skills
When measuring the surface temperature of luminous objects, such as aluminum and stainless steel, reflections from the surface can affect the readings of the infrared thermometer. Before reading the temperature, you can place a tape on the metal surface. After the temperature is balanced, measure the temperature in the tape area.
If you want the infrared thermometer to be able to move back and forth from the kitchen to the refrigerated area and still provide accurate temperature measurements, it must be measured after a period of time in the new environment to reach temperature equilibrium. Place the thermometer in a frequently used location.
Use an infrared thermometer to read the internal temperature of liquid foods, like soups or sauces, which must be stirred, and then measure the surface temperature. Keep steam away from the thermometer to avoid contaminating the lens and causing incorrect readings.
