How to Calibrate Flir Thermal Camera

How to Calibrate Flir Thermal Camera: Step-by-Step Guide

Thermal cameras play a crucial role in various industries such as electrical, mechanical, and building inspections. To ensure accurate and reliable temperature measurements, it is essential to regularly calibrate your FLIR thermal camera. In this comprehensive guide, we will outline the step-by-step process of How to Calibrate Flir Thermal Camera.

How to Calibrate Flir Thermal Camera: A Step-By-Step Guide

Calibrating your FLIR thermal camera is crucial to ensure accurate temperature readings. By following these steps carefully, you can maintain the reliability and precision of your device. Let’s delve into the calibration process in detail.

Why is Calibration Important?

Calibration is the process of aligning the temperature measurement accuracy of your thermal camera with a known reference source. Over time, thermal cameras can experience drift or slight inaccuracies, leading to compromised results. By calibrating your FLIR thermal camera, you can eliminate these discrepancies and maintain consistent and precise temperature measurements.

Step 1: Preparing for Calibration

Before starting the calibration process, it is crucial to ensure that your FLIR thermal camera is in good working condition. Check for any physical damages or lens abnormalities. Make sure that the camera lens is clean and free from smudges or debris that could affect the quality of temperature readings.

It is recommended to perform the calibration process in a controlled environment with stable ambient temperature conditions. Avoid direct exposure to sunlight or strong artificial light sources during calibration.

Step 2: Choosing the Calibration Method

FLIR thermal cameras offer two main calibration methods:

  1. External Calibration: This method involves using a stable temperature reference source, often referred to as a blackbody, to calibrate the camera. The blackbody emits a known and stable temperature, allowing the camera to be adjusted accordingly.
  2. Internal Calibration: Some FLIR thermal cameras come with an internal calibration feature. This method uses built-in temperature references to ensure accurate temperature measurements. Check your camera’s user manual to determine if it has this feature.

Choose the calibration method that suits your camera model and requirements.

Step 3: External Calibration Process

If you opt for external calibration, follow these steps:

  1. Place the blackbody in a controlled environment.
  2. Power on your FLIR thermal camera and allow it to stabilize for a few minutes.
  3. Set your camera to a suitable measurement range and emissivity setting.
  4. Point the camera towards the blackbody and ensure that it fills the camera’s field of view.
  5. Adjust the camera’s settings, if necessary, to match the blackbody’s known temperature.
  6. Repeat this process at multiple temperature points to ensure accuracy across the entire temperature range.

Step 4: Internal Calibration Process

If your FLIR thermal camera has internal calibration capabilities, the process is simplified:

  1. Power on your camera and allow it to stabilize.
  2. Access the camera’s settings menu and locate the internal calibration option.
  3. Follow the on-screen instructions to initiate the internal calibration.
  4. Allow the camera to complete the calibration process.

Step 5: Post-Calibration Verification

After completing the calibration process, it is important to verify the accuracy of your FLIR thermal camera. You can perform a quick verification by pointing the camera toward a stable temperature reference source and ensuring that the displayed temperature matches the known value.

For precise verification, consider having your FLIR thermal camera professionally calibrated by a certified service provider. They have the expertise and specialized equipment to perform detailed calibration and provide you with a calibration certificate as proof of accuracy.

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Frequently Asked Questions 

What Is The Importance Of Calibrating A Flir Thermal Camera?

Calibrating a Flir thermal camera is crucial to ensure accurate temperature measurements and reliable performance. It helps maintain the device’s precision over time, making it essential for various industrial, commercial, and scientific applications.

How Often Should I Calibrate My Flir Thermal Camera?

Regular calibration is recommended to maintain accuracy. It’s typically advised to calibrate a Flir thermal camera annually or as per the manufacturer’s guidelines. Factors like frequency of use and environmental conditions can also influence the calibration frequency.

Can I Calibrate My Flir Thermal Camera Myself?

While some basic checks can be performed by the user, professional calibration by trained technicians is essential to ensure precise and accurate adjustments. DIY calibration attempts may result in inaccurate readings, potentially impacting critical decisions and operations.

What Are The Consequences Of Using An Uncalibrated Flir Thermal Camera?

Using an uncalibrated Flir thermal camera can lead to inaccuracies in temperature measurements, affecting the reliability of your results. It may result in errors in identifying thermal issues, potentially causing safety risks and financial losses.

How Do I Know If My Flir Thermal Camera Needs Calibration?

Signs of potential calibration issues include inconsistent temperature readings, drift in measurements, or unusual behavior during operation. If you notice any of these signs, it’s advisable to seek professional calibration services promptly.

What Are The Key Steps Involved In Calibrating A Flir Thermal Camera?

Calibrating a Flir thermal camera involves various steps, including setting up the camera in a controlled environment, performing reference checks, adjusting emissivity and ambient temperature settings, and verifying the accuracy of readings with a calibrated reference source. Professional technicians possess the expertise to carry out these procedures effectively and accurately.


Regular calibration of your FLIR thermal camera is essential to maintain reliable and accurate temperature measurements. By following the step-by-step process outlined in this guide, you can ensure optimal performance and prolong the lifespan of your thermal camera. Remember to adhere to the manufacturer’s guidelines and consult the user manual specific to your FLIR thermal camera model.


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