How to understand \"pressure measurement with an alarm device\" within the requirements for mandatory calibration of pressure gauges
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As the title suggests, in the classification of pressure gauges and the list of those subject to mandatory inspection in Category A, what exactly is meant by pressure gauges with alarm functions? Does it refer to pressure gauges that have their own alarm capabilities, or does it mean that pressure gauges connected to pipelines or equipment via remote pressure transmitters, and for which alarm values or interlock values have been set, are also considered to be subject to mandatory inspection?
‘‘Pressure measurement with an alarm device’ refers to a pressure measuring device equipped with an alarm signaling device.
Use a electrical contact pressure gauge for measurement
It includes everything. That is: it includes both pressure gauges with alarm signaling functions and remote transmission pressure gauges related to alarms or interlocks ； It also includes a regular pressure gauge that is installed alongside the alarm interlock circuit ； Excludes pressure transmitters and pressure switches without on-site indication. In fact, there are no explicit regulations regarding the understanding of this issue, and different people may have varying interpretations. For example, classifying electric contact pressure gauges and remote transmission pressure gauges under pressure switches and pressure transmitters makes sense from a management perspective, and it is logical. But it is also reasonable to raise the management level when encountering those who insist that it is related to police reporting. .
Thank you for the explanation. Mainly, we need to determine which pressure gauges are subject to mandatory inspection, and there is controversy regarding this point.
This has always been something unclear; in my personal opinion, it refers to instruments such as electric contact pressure gauges and pressure transmitters. But if we talk about alarm functions, there are hardly any pressure transmitters in DCS that do not come equipped with alarms; since all of them are subject to mandatory calibration, that seems unreasonable as well.
It generally refers to electric contact pressure gauges or remote transmission pressure gauges; in addition, they must be used for safety protection, and both of these conditions must be met