Selection Guidelines for High-temperature Thermometers for Foundry Molten Iron
(1) The instrument needs to determine the temperature measurement range: The temperature measurement range is an important performance indicator of the thermometer. Each model of thermometer has its own specific temperature measurement range. Therefore, the user's measured temperature range must be considered accurately and comprehensively, neither too narrow nor too wide.
(2) Determine target size: When measuring temperature, the area of the measured target should fill the field of view of the thermometer. It is recommended that the size of the target being tested exceed 50% of the field of view size. If the target size is smaller than the field of view, the background radiation energy will interfere with the reading, causing errors. On the contrary, if the target is larger than the field of view of the thermometer, the thermometer will not be affected by background radiation outside the measurement area.
(3) Degree: Choosing any instrument is certainly a must consider Infrared thermometers are no exception The choice should also be considered comprehensively, not the higher the better It is better to meet one's own requirements and within the cost budget.
(4) The optical resolution is determined by the ratio of D to S, which is the ratio of the distance D between the thermometer and the target to the diameter S of the measurement spot. If the thermometer must be installed far away from the target due to environmental conditions and needs to measure small targets, a high optical resolution thermometer should be selected
(5) When determining the response: The response time represents the reaction speed of the infrared thermometer to changes in the measured temperature. If the target's movement speed is fast or when measuring rapidly heated targets, a fast response infrared thermometer is required. When there is thermal inertia in a stationary or target thermal process, the response time of the thermometer can be relaxed. Therefore, the selection of response time for infrared thermometers should be adapted to the situation of the target being measured.
(6) Environmental conditions consideration: The environment in which the thermometer is located has a significant impact on the measurement results. When the ambient temperature is too high, there is dust, and other conditions exist, protective covers and other accessories provided by the manufacturer can be selected. These attachments can effectively address environmental impacts and protect the thermometer, achieving accurate temperature measurement.
