In general usage, the term "verification" is often mixed up with "calibration". In contrast to calibration, where the deviation of a measured value is determined and certified from a standard, verification goes well beyond that and is only in very special cases a legal …
Know-how
Positive material identification test (PMI)
| Kai Grabenauer | Know-howThe positive material identification test - PMI test - serves as a proof of the alloying constituents present in the material, confirming the melting analysis of the material contained in the 3.1 certificate. There are two different test procedures common for …
What is the dissipation loss for a pressure transmitter?
| Michèle Beyer | Know-howThe term “dissipation loss” can be found in the data sheet for a pressure sensor or pressure transmitter. One needs this specification in order to be able to protect the pressure sensor from overheating. If a pressure sensor is operated in a hot environment, it …
Calibration or adjustment – where’s the difference?
| Fabian Ehing | Know-howMeasuring instruments for pressure and temperature are used in almost all areas of industrial manufacturing. As a result of continuous mechanical, chemical and thermal loading, these instruments age and can therefore not guarantee the correctness of the measured value …
Connection of an Ex nA digital indicator to an Ex i sensor
| Stefan Heusel | Know-howIs it possible to connect a non-incendive Ex nA digital indicator to an intrinsically safe Ex i sensor in hazardous areas? Very often, signals from pressure sensors that do not have a built-in digital indicator for the measured value are connected to external digital …