Design of an assembly containing reference calibration circuits to be used for spark testapparatus designed according to IEC 60079-11
Başlık çevirisi mevcut değil.
- Tez No: 645629
- Danışmanlar: Belirtilmemiş.
- Tez Türü: Yüksek Lisans
- Konular: Mühendislik Bilimleri, Engineering Sciences
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2017
- Dil: İngilizce
- Üniversite: Hochschule für angewandte Wissenschaften Coburg
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 63
Özet
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Özet (Çeviri)
Electronic devices and components that are certified for operation in explosive atmospheres needs to be designed according to the requirements of the IEC 60079-11. In order to make sure that the prototype of electronic devices and components are safe and not causing explosions in explosive atmospheres, tests have to be conducted with the spark test apparatus. The spark test apparatus has to be calibrated frequently in order to prove sufficient sensitivity. Physikalisch-Technische Bundesanstalt (PTB) has already introduced an assembly of reference calibration circuits specially to organize proficiency testing programs and to allow easy calibration of spark test apparatus in the approx. 90 Ex test laboratories worldwide. The first generation of the assembly has been designed several years ago and is presently used by the Ex laboratories. Especially the check of the homogeneity of the reference calibration circuits is difficult to manage because laboratories need to send the assemblies back to PTB. After the homogeneity check, the devices need to be sent back to the laboratories which takes time and efforts because of the shipping and customs procedures. In order to ease the procedure for testing laboratories, PTB has introduced a new spark test apparatus in 2015. The new apparatus had been designed in a way that allows automation on full testing and calibration procedures. However, without the calibration circuitry and a gas mixer the spark test apparatus cannot fulfill testing requirements by itself. For achieving the full automation of the spark testing, a new gas mixer and a set of calibration circuits are designed, and the software that controls all instrumentation has been programmed. With the new software, all the test sequences could be done automatically without user control, and calibration results could be transferred to web servers for easing the data collection procedure of PTB
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