![background image](http://html1.mh-extra.com/html/oldham/olc-20/olc-20_user-manual_3709814004.webp)
4
8.2
Metrological specifications for explosive gas and oxygen measurement detectors ... 20
8.2.1
Technical Specifications and Special Instructions for explosive gas detectors .... 21
8.2.2
Technical Specifications and Special Instructions for Oxygen detectors ............. 25
8.3
Markings ..................................................................................................................... 26
8.3.1
Flameproof certified version: OLC 20d and OLCT 20 d ...................................... 26
8.3.2
Intrinsic safety version: OLCT 20 i ...................................................................... 26
9
Recommendations ..................................................................................... 27
10
EU Declaration of Conformity ................................................................. 29