i have the dc multimeter 0-120v 30a lcd. model 200485, I am trying to get the control of the relay to work. i have the relay wired correctly, the jumper on the 3w position and the vext powered. When i apply power to the vext the relay automatically opens. I have tried the on and off position on the main display as well as tried it both ways with the ttl settings in both the on and off positions. is there something i am missing? any help would be appreciated. thanks