oil pressure 5011

[smelly]

hi ya guys and girls,
I have a 5011 , I would like to check the oil pressure because the oil pressure light comes on when Idle is below 1100 rpm. what should the pressure be at if I check the pressure and when can I check it . ..... wonders where the pressure sensor is located, maybe tap a "T" there

I am using 10w40 oil

 

[smelly]

replying to part of my question the oil pressure should be at .o5MPa at idle speed
and at operating speed should be 0.2 divided by 0.5mpa..... .4