Discussion on instrument calibration

1. Not all of them; generally, spare parts are used just to make up the numbers. You know how it is in chemical plants. 2. Replace non-mandatory inspection instruments only when they are broken. 3. Due to the lack of established standards, there are no full-time instrument calibration personnel. 4. Electrical measuring instruments used for trade settlement or safety protection must also undergo mandatory regular calibration. Insulation resistance meters and ground resistance meters both fall under the category of safety protection devices ； Voltage & current transformers, as well as meters, fall under trade settlement.

As I understand it, 1) in manufacturing enterprises, to avoid unnecessary complications, instruments that are subject to mandatory inspection must indeed be inspected; these generally refer to pressure gauges and flow and weighing instruments used in trading. For things like simple pressure gauges, it’s possible to establish an internal measurement system within the company; once authorization for calibration is obtained, self-calibration can be carried out. However, for devices related to flow measurement and weighing, one has to delegate these tasks to external parties. 2. For instruments that are not subject to mandatory inspection, the interval is generally one year; in fact, enterprises that follow relevant standards conduct thorough maintenance at the end of each year, during which calibration can be carried out. Also, depending on the actual situation, regular maintenance is carried out, and there are no issues during use; therefore, it’s not necessary to conduct inspections every year. Modern smart meters are of high quality, with drift that is so minimal it can be ignored. 3. It depends on the scale of your operation. I think 1 (person)/200~300 (units). 4. Similar to the above.

Everyone, have the critical inspection instruments been checked on a regular basis? For example, are large devices such as vortex flowmeters and water meters removed for calibration? Are orifice plates and similar items also removed for inspection? One in use and one as backup, with a bypass? What other types of rulers are there? Among the strict enforcement lists, **only a few enforce the rules strictly. Could you give some examples of items that are not subject to mandatory inspection and those that are, indicating which ones are actually inspected and which are not?

Hehe, more or less, that’s right

To date, whether it comes to mandatory inspections or voluntary ones, I have not encountered a single company that complies fully with **legal requirements, including those certified for metrological standards. I really don’t know which other company has managed to do this; I want to learn how *ha* they did it! If everyone fails to comply with these regulations over the long term, should these laws be adjusted?

How do you sing that song? “If they don’t enforce rules properly, then don’t go to work.” Lol; you can sing it that way too for inspections