Does the on-site differential pressure gauge need to be inspected?
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These days, safety inspections are strict; all on-site measuring instruments must be within their calibration period. There are two differential pressure gauges on site, as shown in the figure below; when taken to the municipal metrology institute for calibration, it was stated that they could not be calibrated. Do we have to go to the provincial school? By the way, does this kind of watch need calibration? Are there any standards?
For this type of local pressure gauge, the installing unit can usually calibrate it itself, but the standard gauge used for calibration must be certified by an external metrology agency before it can be used.
If there is a calibration certificate, it can be calibrated at the factory itself; if not, it is necessary to go to the metrology bureau
Such on-site indicators that are not involved in interlocking or regulation do not need to be verified. Yours can be classified as Category C; use it if it’s working fine, and replace it with a new one if it breaks.
We calibrate these meters ourselves; after calibration before installation, a Class C one-time compliance certificate is attached to them, and they are used until they fail, without any further calibration during that period
Thank you all. It was done according to Category C.
If there is a calibration certificate, it can be calibrated at the factory itself; otherwise, it is necessary to go to the metrology bureau
You need to ask at the relevant local Technical Supervision Bureau.
Haha, attach a certificate of conformity and fill in the expiration date
Whether calibration at the provincial level is required depends on the management category of that instrument in your company. If it involves instruments related to safety and environmental protection, your company and the local authorities are not authorized to carry out the calibration; in such cases, calibration must be done at the provincial level.