Can I claim right on the invention made by me outside work

My employer requires me to sign an invention assignment agreement which reads as follows: "I understand that "Company Inventions" means any and all Inventions that I may solely or jointly author, discover, develop, conceive or reduce to practice during the period of the Relationship," where the relationship is defined as: "Any employment or consulting relationship with the company". I presume this should apply to only ideas and inventions(and derived) during the course of my employment. Any unrelated ideas I develop on my own time, using my own equipment still belong to me. Is this correct?