what are the specs on your 70.00 helmet....speed is important...proper shade is important also and depending on the current/metal a delay time is important....read up on a OSHA website regarding welding helmet requirements...good read attached to assist you...plenty of white papers on the internet, OSHA also has a good amount of minimum and recommended requirements. You should not be welding at all without some background in safety...and use of PPE
How to Test an Auto Darkening Welding Helmet in 8 Easy Steps?