This part of IEC 61753 contains the minimum requirements and severities which a fibre optic circulator shall satisfy in order to be categorised as meeting the requirements of circulator devices used in uncontrolled environments. The requirements cover non-connectorised single mode circulators for category U - Uncontrolled environments.
BS EN 61753-091-3:2004 history
2004BS EN 61753-091-3:2004 Fibre optic interconnecting devices and passive components performance standards - Performance standard - Single-mode fibre optic pigtailed style circulators for category U. Uncontrolled environment