

Bought a used Refractometer online but I think the scale might be crooked
I cant test this yet as I don’t have the proper light source nor the RI fluid, it was only 140 USD so I couldn’t resist buying it in the event that maybe it won’t need much recalibration. I’m still ordering RI fluid and the light source it needs. I am very sure I’ll probably need to get this professionally fixed by experts but how risky would it be If I tried to realign it myself? Of course I will be testing it first before anything else, I’m hoping it only needs a hemicylinder polishing and maybe the reading will be okay or maybe just very slightly off.