LEAK DETECTION


Getting it right C


Proper gas fl ow as specifi ed for the detector model is critical for achieving precise


calibration results and ensuring consistency across multiple calibration sessions and multiple gas detectors.


alibrating refrigerant gas detectors is a critical task to ensure their accuracy and reliability in detecting potentially harmful gases. Whether you’re a seasoned


technician or new to the process, mastering calibration techniques is essential for maintaining safety and compliance in refrigeration systems. In this article, we’ll explore some valuable tips to help navigate the calibration process eff ectively and effi ciently.


Understand manufacturer guidelines Before beginning the calibration process, thoroughly review


the manufacturer’s guidelines and recommendations specifi c to your gas detector model. These guidelines often provide detailed instructions on calibration procedures, frequency, and necessary equipment.


Choose the right calibration gas Selecting the appropriate calibration gas is crucial for accurate


calibration results. Ensure that the calibration gas matches the type of refrigerant gas detected by your device. Additionally, verify the gas concentration levels required for calibration, as they may vary depending on the detector’s specifi cations. Also note whether the refrigerant sensor being used is aff ected by the presence of oxygen. This can determine whether your calibration gas should be mixed with air or with nitrogen.


Establish calibration frequency Determining the optimal calibration frequency is essential


to maintain the reliability of your refrigerant gas detector. While manufacturers typically recommend annual calibration,


Here, we share these tips for calibrating refrigerant gas detectors from refrigerant gas detection specialist Samon.


consider factors such as environmental conditions, typical exposure to target gases, and regulatory requirements when establishing your calibration schedule. The requirements of any relevant standards should also be followed, including refrigeration safety standards – such as EN 378, ASHRAE 15 – and local regulations. Whilst these often concur with the recommendation for annual calibration, in some cases they can demand a greater frequency of maintenance checks.


Perform pre-calibration checks Before initiating the calibration process, conduct thorough


pre-calibration checks to ensure the detector is functioning correctly. Inspect the device for any visible damage or signs of wear, and verify that all components are securely in place.


Follow proper calibration procedures Adhere strictly to the calibration procedures outlined in the


manufacturer’s guidelines. Pay close attention to each step of the process, including sensor warm-up, gas fl ow adjustments, and calibration gas concentration settings. Avoid skipping any calibration steps, as this may compromise the accuracy of the results.


Use calibration gas regulators Utilise calibration gas regulators to control the fl ow of


calibration gas accurately. Proper gas fl ow as specifi ed for the detector model is critical for achieving precise calibration results and ensuring consistency across multiple calibration sessions and multiple gas detectors.


Document calibration records Maintain detailed records of all calibration activities, including


the date, time, gas concentration levels, and any adjustments made during the calibration process. This documentation serves as crucial evidence of compliance with regulatory requirements and provides an auditable historical record.


After completing the calibration process, perform post-


calibration verifi cation checks to confi rm the accuracy of the refrigerant detector’s readings. Use calibration gas test kits or certifi ed calibration gas sources to validate the device’s performance and verify that it meets acceptable tolerance levels. Also check the status of the instrument and that it does not remain in service mode: the output of alarm signals to other devices is a critical part of the safety system. Calibrating refrigerant gas detectors is a fundamental aspect of ensuring the safety and reliability of refrigeration systems. By following these tips, the calibration process can be mastered, and the accuracy of gas detectors maintained eff ectively.


18 November 2024 • www.acr-news.com Download the ACR News app today


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44