Telops infrared thermal imagerTroubleshooting: Full process response from data anomalies to hardware maintenance
1、 Data anomaly: inaccurate temperature measurement and image distortion
1. Temperature measurement deviation
Parameter setting error:
Emissivity mismatch: There is a significant difference in emissivity between different materials (such as metal 0.1-0.3, plastic 0.9-0.95). If the emissivity is not adjusted according to the measured object (such as mistakenly setting it to 0.95 when measuring metal), it will result in a false high temperature reading.
Temperature measurement range error: Telops thermal imagers typically provide multiple temperature measurement ranges (such as -40 ℃ to 1200 ℃). If the target temperature exceeds the current range, it is necessary to switch to the appropriate range (such as selecting the 0 ℃ to 1500 ℃ range for high temperature scenarios).
Environmental parameters not corrected: Atmospheric temperature, humidity, and target distance affect radiation transmission. For example, not enabling the "humidity compensation" function in an environment with 80% humidity may result in temperature measurement errors of ± 5 ℃.
Hardware issues:
Sensor contamination: Dust and oil stains on the surface of the lens or detector can block infrared radiation. Use professional lens paper or compressed air for cleaning to avoid scratching the optical coating.
Sensor aging: Long term use at high temperatures may lead to a decrease in detector sensitivity. If the device has been used for more than 5 years and temperature drift occurs, it is recommended to return it to the factory for calibration or replace the sensor.
2. Image distortion
Focus blur:
Manual focusing error: Some Telops models (such as FAST-IR 1000) support manual focusing. If the focus ring is not rotated to a clear position, the image will become blurry.
Auto focus failure: In low contrast scenes (such as monochrome backgrounds), auto focus may fail. Need to switch to manual mode or adjust the target lighting.
Non uniformity correction (NUC) not performed:
The difference in response of each pixel in the detector can lead to fixed pattern noise in the image. After booting up, you need to wait for the NUC to complete (usually 1-2 minutes), or manually trigger calibration in the menu.
2、 Hardware Failure: Full Link Troubleshooting from Power Supply to Circuit
1. Power failure
Unable to power on:
Battery issue: If using battery power, check if the battery is sufficient (Telops battery life is usually 2-4 hours). If the battery is low, it needs to be charged or replaced; If the battery has poor contact, clean the contacts and reinstall.
Adapter malfunction: If using an external power supply, check if the output voltage of the adapter matches the device requirements (such as 12V/3A). Damaged adapters can cause the device to fail to start.
Unstable job:
Loose power cord: Check if the power cord is securely connected to the device or socket. Loosening can cause intermittent power outages or data loss.
2. Line and interface faults
Data transmission interruption:
Cable damage: If data is transmitted through USB/GigE interface, check whether the cable is damaged or excessively bent. Telops recommends using original cables to avoid signal attenuation.
Interface oxidation: After long-term use, the interface may oxidize and cause poor contact. Clean the metal contacts of the interface with an alcohol swab and reconnect them after drying.
External device not recognized:
Driver not installed: If the device is not recognized when connected to the computer, Telops official driver (such as PFV software matching driver) needs to be installed.
Outdated firmware: Old versions of firmware may have compatibility issues. Check and update to the latest firmware using PFV software (such as v2025.1 version optimized for GigE transmission stability).
3、 Environmental interference: coping strategies for temperature, lighting, and radiation
1. Environmental temperature fluctuations
Temperature measurement error:
Equipment not preheated: Telops thermal imager needs to be left at the target ambient temperature for 15-30 minutes to achieve thermal equilibrium. If brought directly into a high-temperature workshop from a low-temperature environment, the sensor needs time to adapt, otherwise the temperature measurement deviation can reach ± 10 ℃.
Temperature shock: Avoid quickly transferring equipment from high-temperature environments (such as steel furnaces) to low-temperature environments (such as air-conditioned rooms), as this may cause sensor condensation damage.
2. Light and radiation interference
Direct sunlight:
Lens glare: Direct exposure of strong light to the lens can cause overexposure of the image. Use a light shield or adjust the shooting angle (avoid the angle between the lens and the sun being less than 30 °).
Environmental reflection: Smooth surfaces (such as metal and glass) reflect infrared radiation, which interferes with temperature measurement. In the reflection scene, the "Reflection Compensation" function needs to be enabled in the PFV software.
Strong radiation source:
Laser interference: If there is a laser rangefinder or indicator on site, avoid aiming its beam at the thermal imager lens, otherwise it may damage the detector.
Welding arc light: The strong light generated by welding operations contains a large amount of infrared radiation, which can cause image saturation. When shooting, it is necessary to stay away from the welding area or use a filter (such as Telops dedicated ND filter).
4、 Maintenance and upkeep: key measures to extend equipment lifespan
1. Daily cleaning
Lens maintenance:
Non contact cleaning: Use air blowing to remove dust from the surface of the lens, avoiding direct wiping.
Professional cleaner: If the lens has oil stains, use lens paper dipped in a small amount of isopropanol (concentration ≥ 99%) to gently wipe it, and spiral clean from the center outward.
Body cleaning:
Dustproof and moisture-proof: After use, wipe the body with a dry soft cloth to prevent dust from entering the interface or heat dissipation hole.
Corrosion prevention: If used in a chemical environment, apply rust proof oil to the metal interface after cleaning to prevent oxidation.
2. Storage and transportation
Long term storage:
Dry environment: Store the device in an environment with humidity<60% to avoid lens mold. Can be filled with desiccants (such as silicone bags) and replaced regularly.
Battery management: If not used for a long time, charge the battery to 50% every 2 months to avoid complete discharge and battery damage.
Transportation protection:
Special case: use Telops original transport case, filled with foam to prevent vibration.
Anti impact: Avoid collisions between equipment and hard objects during transportation, especially protecting the lens and display screen.
5、 Advanced Tip: Parameter Optimization for Improving Imaging Quality
1. Dynamic range adjustment
High contrast scene:
When shooting flames or high-temperature metals, enable the "High Dynamic Range (HDR)" mode (such as the EDHR function of the Telops FAST-IR series) to capture both bright details (such as flame cores) and dark details (such as backgrounds) simultaneously.
Low contrast scene:
When shooting objects with uniform temperature (such as concrete walls), reduce the dynamic range to 8-10 positions to minimize noise interference.
2. Balance frame rate and resolution
High speed motion capture:
If you need to capture explosions or ballistic trajectories, prioritize maintaining a frame rate (such as 10000fps or above) and reduce the resolution appropriately (such as 256x256 pixels). The Telops KT series supports local area high frame rate mode, which can achieve 916660fps at 100x100 pixels.
Static scene analysis:
If analyzing the thermal conduction process of materials, priority should be given to ensuring resolution (such as 1024x1024 pixels) and reducing frame rate appropriately (such as 100fps).
3. Multispectral imaging configuration
Material identification:
The Telops Hyper CAM series supports multispectral imaging, distinguishing different materials (such as metals and plastics) by switching filters (such as 3-5 μ m, 8-12 μ m bands).
Temperature field and spectral synchronization analysis:
In combustion research, the MS multispectral option is combined to synchronously obtain spectral information of temperature distribution and gas composition (such as CO ₂, H ₂ O).