Calibration and repair of detectors
CALIBRATION OF GAS DETECTORS
We have to understand that when you send for example a king’s foot or a dynamometer to calibrate the calibration consists of verifying that the equipment measures correctly and its margin of error is within the range allowed for a gas detector the calibration consists of verifying and correcting the detector expects a certain proportion of gas to check its operation and self-correct, That certain proportion of gas is different according to the manufacturer the sensors are worn by time, overexposures poisonings etc and their measurement begins to be not so accurate, so they must be calibrated to correct these deviations.
You will find many companies that have a laboratory certified by ENAC then it turns out that they are certified for temperatures, voltages, pressures, etc. as far as we know hydrogen sulfide does not fall within the ENAC accreditation and almost all these laboratories verify, do not correct.
You can not imagine the times they bring a detector to calibrate and when you put it in the manufacturer’s program, the equipment tells you that it has not been calibrated for years, the client quickly tells you that if he has calibrated it and sends you certificates of “calibration” in which the laboratory has practiced a gas to the equipment to check its reading that, It is a verification that the equipment reads correctly, but for the equipment it has not been calibrated, nor has it been self-corrected.
That is, everything is called calibration both verification and verification with correction, but they are very different. One way to differentiate what type of calibration we have done is to look at the certificate that mediates before and after calibration and see if any deviation has been corrected.
For users who perform a “functional test” of their instrument before each use, the calibration cycle can be extended to 6 months even to one year if requested by the customer’s respective department.
Calibration frequency is one of the most frequently asked questions about the use of gas detection instruments.
Regulatory agencies generally recommend users to follow manufacturers’ recommended protocols for calibration.
There is no universal standard for when to calibrate equipment.