How often should gas monitors be calibrated
Gas monitors are instruments for detecting gas concentration in the air environment, and its service life is related to the user’s operation, temperature and humidity of the detecting environment, corrosion of toxic gases, etc. The prolonged use of monitors and detectors without calibration will lead to inaccurate measurement data, and accordingly affect the safety of people and property in the measuring area. So how often should gas monitors be calibrated? Next, Fosensor will address this issue to provide you with a detailed introduction to the next!
Calibration cycle of gas detector
The calibration cycle of gas detector in normal use is once a year, but when the instrument is used in harsh environments, it needs to be calibrated once every six months or three months, because different environments have different impacts on the instrument, so we can judge the calibration cycle of the instrument according to the actual environmental conditions in the process of using the gas detector.
Calibration method of gas detector
Usually the calibration method used by the gas detector is manual calibration, manual calibration of various types of gas detectors will involve a known concentration of test gas response degree, in the calibration process, attention should be paid to the degree of adjustment to the parameters with the test gas, which indicates that the calibration is complete.
The instrument can be calibrated with a zero gas and a standard gas first, and the instrument will store the standard curve obtained. When the gas detector is working in the measured environment, the instrument will compare the signal generated by the detected concentration of the measured gas with the standard curve stored in the calibration, and then get the value of the concentration of the measured gas through calculation.
Why calibrate gas detectors regularly
Zeroing the instrument at any time and calibrating it regularly are both essential to ensure that it measures accurately. It is important to note that although many gas detectors are now available with interchangeable sensors, this does not mean that a detector can be fitted with a different detector probe at any time. Whenever a probe is changed, the gas detector must be recalibrated in addition to the sensor activation time. In addition, it is recommended that all types of instruments be tested accordingly with the standard gas before they are used to ensure that the gas detector is truly protective.
If the instrument is used as a safety alarm in an open situation, such as an open workshop, a portable gas detector can be used because it can continuously, real-time and accurately display the concentration of toxic and hazardous gases at the site.
Fixed gas concentration detectors are generally two-body type, with sensors and transducers composed of the detection head as a whole installed in the detection site, there are circuits, power supply and display alarm devices composed of secondary instrumentation as a whole installed in the safety of the place, easy to monitor.
Calibration of a gas detector is an important way to test the sensitivity of the instrument and restore its accuracy. At the same time, through testing and calibration we can also determine whether the sensor of the gas detector has failed. Therefore, regular instrument calibration is very necessary.
