On the calibration of mandatory and non-mandatory measuring instruments
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Dear colleagues: The Announcement by the State Administration for Market Regulation on Issuing the Catalogue of Measuring Instruments Subject to Mandatory Control (No. 48, 2019) stipulates that measuring instruments included in the Catalogue and for which the control method is V (mandatory verification) or P+V (type approval + mandatory verification) must undergo mandatory verification during use. For other measuring instruments, mandatory verification is no longer required; users may choose either non-mandatory verification or calibration methods to ensure the accuracy of their measurements. For gas detectors (alarms) for toxic, harmful, flammable, and explosive gases, the supervision method is P; how should they be calibrated? 1. Calibration should continue to be carried out by the Technical Supervision Bureau, but it is possible that this bureau will charge a fee. 2. For self-testing or calibration, are there any more precise legal or regulatory requirements to follow? Are there any requirements regarding the qualifications for self-testing or calibration? What are the requirements? If I conduct my own testing or calibration, will I fail the inspection by the safety supervision agency?
For safety monitoring, whether it is subject to mandatory inspection or not, it is best to have it inspected; this will ensure no issues arise during inspections by the safety supervision agency.
Approval from the safety supervision agency is required; payment is inevitable. Some measuring devices are exempt from such fees. To conduct self-inspections, one needs to obtain a relevant certification, and calibration certificates also require paid annual reviews. It is recommended to obtain the necessary certification and carry out self-inspections when there is a large volume of products to be inspected; otherwise, it’s better to go to the safety supervision agency. Fines may be a minor issue, but suspension of production can be troublesome
I haven’t carried out instrument calibration for some time now, so I’m not entirely sure what changes have taken place. I’ll respond based on what I know, hoping it will be helpful to you. Self-inspection can be carried out in accordance with the relevant inspection standards, which can be downloaded from the internet or purchased from standard bookstores. If conducting calibration oneself, first of all the organization must have the necessary qualifications for such tasks; if it is only for internal use, that is, for calibrating instruments within the organization itself, obtaining these qualifications is not that difficult ； Secondly, the unit must have traceable standard instruments for meter calibration ； There are also individuals who need to have certification for their work. A few years ago, the certificates for inspectors were merged and abolished; the current certifications are those of Level 2 or Level 1 Metrologists. These are registered professional qualification exams, and they are quite challenging. You can look up more information on Baidu – if you intend to take these exams, be prepared to devote several years to preparing for them. Rumors suggest that some provinces and cities still have inspector certificates; if such certificates can be found, it will be much easier to obtain the necessary personnel credentials. With all the necessary documents in place, one can carry out calibration or adjustment in accordance with the relevant metrological standards, and upon completion, a report indicating whether the calibration was successful or not can be issued.
I haven’t carried out instrument calibration for some time now, so I’m not entirely sure what changes have taken place. I’ll respond based on what I know, hoping it will be helpful to you. Self-inspection can be carried out in accordance with the relevant inspection standards, which can be downloaded from the internet or purchased from standard bookstores. If conducting calibration oneself, first of all the organization must have the necessary qualifications for such tasks; if it is only for internal use, that is, for calibrating instruments within the organization itself, obtaining these qualifications is not that difficult ； Secondly, the unit must have traceable standard instruments for meter calibration ； There are also individuals who need to have certification for their work. A few years ago, the certificates for inspectors were merged and abolished; the current certifications are those of Level 2 or Level 1 Metrologists. These are registered professional qualification exams, and they are quite challenging. You can look up more information on Baidu – if you intend to take these exams, be prepared to devote several years to preparing for them. Rumors suggest that some provinces and cities still have inspector certificates; if such certificates can be found, it will be much easier to obtain the necessary personnel credentials. With all the necessary documents in place, one can carry out calibration or adjustment in accordance with the relevant metrological standards, and upon completion, a report indicating whether the calibration was successful or not can be issued.