Gas detector calibration is a critical step in ensuring your device provides accurate and reliable readings. However, even the most experienced users can make mistakes during the calibration process, potentially compromising the device’s reading. To help avoid common mistakes in gas detection calibration, here is a list of errors to watch out for and how to address them effectively.
1. Skipping Calibration Altogether
Although most professionals understand the importance of regular calibration, some people may feel more comfortable skipping the calibration step or not calibrating their instruments as often as is recommended. Ignoring calibration can result in undetected gas leaks or false alarms, both of which are dangerous.
The best way to solve this issue is to make sure your team is educated on the importance of calibrating their devices on a regular basis. Having a standard procedure in place ensures that your entire team is on the same page and knows when each instrument needs calibration.
2. Using Expired Calibration Gas
Like most things, calibration gases have a shelf life, and using expired gas can cause incorrect calibration leading to bad readings.
To avoid this, always check the expiration date for the calibration gas that you are using.
3. Calibrating in the Wrong Environment
Calibrating your device in an uncontrolled environment can cause inaccurate results. Things like temperature, humidity, and pressure can greatly affect the accuracy of the calibration.
To solve this issue, make sure to calibrate your gas detector instruments in a controlled environment that closely mimics the conditions where they will be used.
4. Failing to Perform a Bump Test First
Performing a bump test is a critical first step when using your gas-detecting device. A bump test is simply a way to make sure that your device works, it doesn’t provide any information on the accuracy of the measurements, but simply that it can measure. Before you calibrate your device, you should check to make sure that the sensors work. If you skip this step, you may be wasting time calibrating a device that doesn’t work to begin with.
The solution is simple, always perform a bump test before you calibrate your device.
5. Using the Wrong Calibration Gas Concentration
Each gas detector is designed for specific concentrations of certain calibration gases. Using the wrong concentration can cause the detector to provide an inaccurate reading.
Make sure to check your detector’s manual to determine the correct gas concentration for calibration and only use the gases that match the detector’s specifications.
6. Overlooking Zero Calibration
Much like a scale or other measuring instruments, you have to ‘zero’ them before measuring to make sure you get an accurate reading. Gas detectors operate the same way. Zero calibration sets the detector to a baseline with zero target gases present to make sure you get an accurate reading.
Always start with a zero calibration before using your device
7. Ignoring Manufacturer Guidelines
Every gas detector is a little different. You may think you can use all gas detectors interchangeably but it is best to listen to the manufacturer to ensure accurate calibration and correct readings.
Refer to the user manual for each gas detector device you use to make sure you know their specific calibration procedures.
Properly calibrating your gas detector is essential to ensure the safety and effectiveness of your instrument. Most issues related to calibration can be avoided by following these best practices and following the manufacturer’s guidelines.