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The temperature rise of electrical equipment is directly related to its operating voltage and load current. Heating power increases with the square of current for conductive faults and with the square of voltage for insulation faults. Under low load or no-load conditions, fault heating may not be obvious, even in the presence of serious defects.
Countermeasure: Infrared inspection should be performed under rated voltage and preferably high-load conditions. If full load is not available, the equipment should operate under load for a sufficient period (e.g. 4–6 hours) before inspection to ensure stable temperature rise at potential fault points.
Infrared pyrometers measure temperature based on surface radiation. Different materials and surface conditions (oxidation, coating, roughness, contamination) have different emissivity values, which can cause temperature measurement errors.
Countermeasure: The emissivity of the measured surface should be correctly set in the instrument. For frequently inspected components, applying high-emissivity coating or paint can improve measurement accuracy and result consistency.
Infrared radiation is attenuated by atmospheric absorption and scattering caused by water vapor, dust, and gas molecules. Longer detection distances increase measurement error, especially for low-temperature-rise faults.
Countermeasure: Perform measurements in dry, clean atmospheric conditions and minimize the detection distance while maintaining safety. Distance correction should be applied when necessary.
Rain, snow, fog, and strong wind can significantly affect infrared temperature measurement and may lead to false fault indications.
Countermeasure: Inspections should be carried out at night or during stable weather conditions with no rain, fog, or strong wind.
Background radiation, reflections from surrounding objects, and direct sunlight can interfere with accurate temperature measurement.
Countermeasure: Perform inspections on cloudy days or in the evening, avoid reflective angles, use shielding or infrared filters if necessary, and ensure the target fully fills the instrument’s field of view.
Measuring range：700℃～1800℃
Detector：Si/Si（Laminated silicon）
Distance coefficients：100：1
Measuring Distance：Standard Focus length：0.35m adjustable to infinity，Near focus distance：0.2m～0.5m
Accuracy：±0.5%T℃（T is measured temperature）
Resolution：0.1℃
Repeat Accuracy：±2℃
Response time：Fasted 5ms, adjustable in 5ms-99.99s
Model | FSR-7018 |
Measuring Range | 700℃～1800℃ |
Detector | Si |
2-color Wavelength | Wavelength1:（0.7～1.08）μm; Wavelength2: 1.08μm |
1-color Wavelength | 1.08μm |
Applications | High accuracy, highly stable two color infrared pyrometer,applied to metallurgical industry（rod and wire mills、Hot rolling mills）, foundry, cement kiln, induction heating, heat treatment, heating furnace, vacuum furnace, monocrystalline silicon, polysilicon, semiconductor and other industrial occasions with high ambient temperature or electromagnetic interference. |
Distance coefficients | 100：1 |
Focal length | Standard：0.35m adjustable to infinity， Near focus distance：0.2m～0.5m |
Accuracy | ±0.5%T℃（T is measured temperature） |
Resolution | 0.1℃ |
Repeat Accuracy | ±2℃ |
Calibration coefficient | 0.100～1.000, Adjustable in 0.001 increments |
Response time | Fasted: 5ms，adjustable in 5ms-99.99s |
Display mode | Industrial-grade self-luminous OLED display screen (default) or visual eyepiece aiming |
Aiming method | Visual green spot (default) or eyepiece aiming, alternative |
IP Rating | IP65 |
