BS EN 50212:2020 pdf free.Connectors for thermoelectric sensors.
BS EN 50212 1 Scope The object of this document is to determine the composition, nature of materials, manufacturing tests and thermoelectronic behaviour of connectors for sensors using thermocouples according to EN 60584-3:2008. This document does not cover such special thermocouples as U, L and W types; nevertheless, the user of such special thermocouples can use the connectors described hereafter with some restrictions mentioned in the relevant paragraphs. 2 Normative References The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60584 (series), Thermocouples 4.1.1 Connectors with specified dimensional characteristics They are defined in this standard by their dimensional, physical, electrical and chemical characteristics. The types retained in this standard are: A type: connectors with cylindrical pins and cylindrical sockets; connectors with flat pins and flat sockets. 4.1.2  Other connectors The electrical characteristics are identical to those defined for connectors described in 4.1.1. W ithdrawal tests, waterproof and dustproof tests, corrosion tests, test for resistance to heat will be stated by the manufacturer as list of technical characteristics. The dimensional, physical and chemical characteristics peculiar to each manufacturer are not specified. 4.2 Marking for identification and polarities The connectors shall comprise a permanent colour marking, e.g. either indelible superficial or mass colouring, or recessed coloured dots or coloured rings, etc. At least the + polarity shall be indicated be permanent marking. Though non-compulsory, to avoid confusion with previous markings, or markings in other standards, the thermocouple type may be also additionally indicated, see Table 1.The measurements shall be made using a millivoltmeter having a metrological quality related to the error to be measured. The temperature/millivolt correspondence is stated in the relevant standard1. 一The first measurement is made by direct connection by the thermocouple. 一The second measurement is made through the connector. The insertion error is the difference between the two values noted down one when directly connected by the thermocouple, and the other when connected through the connector. BS EN 50212 pdf download.