My Ex personnel competence as an Ex manufacturer shall be measured by the Ex certificate driven by the region product goes into.
If I do service related to product such as installation, maintenance or even repair on site, which is potential hazardous one – in that case there is a must have to prove my Ex personnel competency defined in relevant standards (ISO, IEC, EN and many more).
Keep up good work.
Arpad
Inspecting a non-electrical device with Ex h (explosion-proof) protection method in a
What you do when you experience failures / non compliance /… related
I have tried a little to get a look at what happened
Just found one company providing a list of references, where they were
arpadveress 
