Tips and methods for accurate temperature measurement with infrared thermometer

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Tips and methods for accurate temperature measurement with infrared thermometer [Copy link]

1. Working Principle of Infrared Thermometer
　　Infrared thermometer consists of optical system, photoelectric detector , signal amplifier and signal processing. Display output and other parts. The optical system gathers the infrared radiation energy of the target in its field of view, and the infrared energy is focused on the photoelectric detector and converted into a corresponding electrical signal, which is then converted into the temperature value of the measured target.
　　2. Benefits of using infrared thermometer
　　1. Convenience: Infrared thermometer can quickly provide temperature measurement. In the time it takes to read a leaking connection point with a thermocouple, the temperature of almost all connection points can be read with an infrared thermometer. In addition, because the infrared thermometer is solid, light, and easy to put in a leather case when not in use, it can be carried when you are patrolling the factory and doing daily inspections.
　　2. Accuracy: Another advanced feature of infrared thermometers is accuracy, usually within 1 degree. This performance is particularly important when you are doing preventive maintenance, such as monitoring poor production conditions and special events that will cause equipment damage or downtime. Because most equipment and plants run 365 days a year, downtime equals lost revenue. To prevent such losses, scan all on-site electronic equipment - circuit breakers, transformers, fuses, switches, buses and distribution boards to find hot spots. With an infrared thermometer, you can quickly detect even small changes in operating temperature and solve problems at their infancy, reducing the cost and scope of repairs caused by equipment failure.

　　3. Safety: Safety is the most important benefit of using an infrared thermometer. Unlike a contact thermometer, an infrared thermometer can safely read the temperature of an inaccessible or unreachable target. You can read the target temperature within the range allowed by the instrument. Non-contact temperature measurement can also be performed in unsafe or difficult areas, such as near steam valves or heating furnaces. They do not need to risk burning their fingers when taking contact temperature measurements. Accurately measuring the temperature of the supply/return air outlet 25 feet above the head is as easy as measuring it at hand. Infrared thermometers have laser aiming to facilitate identification of the target area. With it, your work becomes much easier.

　　3. Where are the main areas of infrared thermometer use?
　　Infrared thermometers have been proven to be an effective tool for detecting and diagnosing electronic equipment failures. It can save a lot of money. With infrared thermometers, you can continuously diagnose electronic connection problems and detect the functional status of uninterruptible power supplies (UPS) by finding hot spots at the output filter connection on the DC battery. You can check battery components and power distribution board terminals, switch gears or fuse connections to prevent energy consumption; because loose connectors and combinations will generate heat, infrared thermometers help identify insulation failures in circuit interrupters. Or monitor electronic compressors; daily scanning of transformer hot spots can detect cracked windings and terminals.
　　4. How to measure temperature with infrared thermometers
　　The following are three temperature measurement technologies for non-contact thermometers:
　　1. Point measurement: Determine the temperature of the entire surface of an object, such as an engine or other equipment
　　2. Temperature difference measurement: Compare the measured temperatures of two independent points, such as connectors or circuit breakers
　　3. Scanning measurement: Detect changes in targets in a wide area or continuous area. Like refrigeration pipelines or distribution rooms.
　　5. Main considerations for selecting an infrared thermometer
　　1. Temperature range: Each type of thermometer has its own 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 target to be measured should exceed 50% of the field of view of the thermometer.
　　3. Optical resolution (D:S): The ratio of the thermometer probe to the target diameter. If the thermometer is far away from the target and the target is small, a high-resolution thermometer should be selected.
　　6. Tips for accurate temperature measurement
　　When measuring the surface temperature of luminous objects, such as aluminum and stainless steel, the reflection of the surface will affect the reading of the infrared thermometer. Before reading the temperature, you can put a rubber strip on the metal surface, and after the temperature is balanced, measure the temperature of the rubber strip area.
　　If you want the infrared thermometer to be able to provide accurate temperature measurements when moving back and forth from the kitchen to the cold storage area, you must wait for a period of time in the new environment to reach temperature equilibrium before measuring. It is best to place the thermometer in a place where it is often used.
　　When using an infrared thermometer to read the internal temperature of a fluid food, such as a soup or sauce, you must stir it before measuring the surface temperature. Keep the thermometer away from steam to avoid contaminating the lens and causing incorrect readings.