In simple terms, calibration is the comparison of a measure to a standard to determine its accuracy in measurement. The calibration of gas detectors ascertains whether the detector’s sensors can detect emitted gas. You can perform this process using a menu within the detector’s display unit.
Calibration makes sure that the detector’s sensors are accurate and capable of detecting gas leaks. This post presents to you the basics of gas detector testing and calibration as well as the required frequency of calibration.
What Should You Look For When Calibrating Your Gas Detectors?
You need to confirm the expiry date of your calibration gas before the actual calibration. But it’s even more prudent to check that date at the time that you buy your calibration gas from your calibration gas suppliers. You should also ask your calibration gas suppliers to provide you with a specialty gas. The gas should have a precise concentration of gas that is akin to the gas brand and detector under calibration.
Ensure that your detector is at the zero marks or level before calibration. You should zero the detector using a zero air cylinder or in a room with clean air. After doing so, you can conduct the calibration. If the detector in question fails the calibration test, then you should contact your calibration gas suppliers or the manufacturer.
How Often Should You Calibrate Your Gas Detectors?
When was the last time that you calibrated your gas detector? Or how often do you calibrate your gas detectors? According to OSHA environmental gas standards and recommendations, you should calibrate every gas detector after you get it from your calibration gas suppliers. Thereafter, you should create a calibration frequency depending on the type of gas detector.
The frequency of calibration varies, but you at least need to calibrate or bump test each detector before use. Apart from conducting calibrations and bump tests, you also need to perform annual gas detector servicing and occasional servicing. The later gets done when gas detectors get subjected to conditions that can damage them. Such conditions include mechanical shock or extreme temperatures.
You can start by making weekly calibrations. If there are no significant adjustments required after a few weeks, you can reduce the calibration frequency to a level where only minor adjustments will be required during calibration. By the end of one to three months, you should have established a full calibration frequency.
Are Exceptional Calibration Frequencies Required?
If you use your gas detectors for only a few times in a year, then you should calibrate them before each use. When you use gas detector calibration information to provide evidence in court, then you should calibrate the detector before and after each test used as proof in the court of law. You should do the before and after tests to avoid any doubts about a perfect working detector.
Why is a Bump Test Necessary For Gas Detectors?
In a bump test, you’ll hold up the gas detector to the level of calibration for a time long enough to trigger the sensors. The method only tests sensor functionality. But you need calibration gases for the test. You can use the bump test to determine whether the gas detector works.
If you bump test your detectors before every use, your frequency of detector calibration can be prolonged for three to six months (assuming the detector passes the test every time it’s done). You should re-calibrate your detector if it fails the bump test. If it still fails the calibration, you should reach out to the calibration gas supplier or the detector manufacturer.
Annual Gas Detector Service
Apart from regular calibration, gas detectors need annual servicing. In an annual servicing process, you should inspect, repair, and re-calibrate your detector. This process is often done by your calibration gas suppliers or any authorized gas company.
Safety is paramount in industrial gas use. But it’s even more important in the American homes. Afterr all, 66.7 million houses in America receive their fuel from natural gas. Gas leakages can cause great harm — but with ideal gas detectors, you can sense them and stop them. This is the reason why gas detector calibration is essential in averting hazards related to leakages.