Where did you get your meter and how much did it cost? What brand is it?I have wanted to monitor radiation for decades. Thanks for the info.
Go to www.ki4u.com
They sell and calibrate rad meters.
I got mine at a garage sale for $5.
For another $500 I got those guys to repair and calibrate it.
They have instructions on how to make your own meter for a few dollars. I have done that before.
Good luck.