Multiple VI's collecting on one DMM/Mux

I have a PXI-4070 mux'd with a PXI-2503. I am trying to create multiple VI's to read the DMM (for example, one VI for voltages on a range of channels, one for resisrtance on another range, etc). Is this possible? There appears to be only one IVI instrument handle for each PXI device and whenever a new VI is run it wipes out the VI that was already running.

Thanks.