Hi i not speak english very good , but i trie my problem is i want to buy a m91-2r1 with a io -pt 4 an a module ex a1 can i with this instrument work with rtd 3000 or is only for pt-100 and pt-1000? and with only this i can make a proyect for mintoring a 4 temperature ?do not i nesesite a software aditional or another hardware or is better to buy a anlaogic input module please help me in what i need ?