I have bought a nellcor n-200 on enay. I think it was made in 1991 based on the date code of the chips inside. I opened it up to replace the battery which was getting warm. I wrote some software to capture the output and log it but I am having trouble getting the unit to talk to the computer. I tri...

I have bought a nellcor n-200 on enay. I think it was made in 1991 based on the date code of the chips inside. I opened it up to replace the battery which was getting warm. I wrote some software to capture the output and log it but I am having trouble getting the unit to talk to the computer. I trie...