This Part of IEC 62828 establishes a general framework for defining reference conditions and test procedures applicable for assessing the measurement performances of all types of industrial and process measurement transmitters (PMTs) used in measuring and control systems for industrial process and machinery. For the purpose of this document, an analogue PMT is a process measurement transmitter with only analogue current and/or voltage output(s), irrespective the technology adopted and the complexity of the circuitry. All the other process measurement transmitters, with digital output(s) only or with hybrid analogue and digital output(s), are considered to be digital PMTs. This part of IEC 62828 constitutes a common reference for the other parts of the series. Specific test procedures and additional requirements for given types of PMTs (pressure, temperature, level, flow, etc.) are covered by other parts of this series. Proximity devices according IEC 60947-series with analogue output are excluded from the scope of this standard. Note 1: in industrial and process applications, to indicate the process measurement transmitters it is common also to use the terms industrial transmitters , or process transmitters . Note 2: for better clarity, when the complete definition industrial and process measurement transmitter makes the sentence too long in this standard, the short term transmitter , or PMT, is used instead.