A portable interface device and a system utilizing the same are disclosed. A probe interface connects the interface device to a probe that collects data related to a physiological condition of a user in response to commands input to the interface device on the user interface. The data processor stores information specifying a position on a user's body at which a probe connected to the probe interface is to be positioned. The data processor displays a graphic on a display screen indicating a location on a user's body at which a probe connected to the probe interface is to be placed. A data processor records data from the probe when the probe is positioned as indicated in the graphic. The recorded data is communicated over the computer network to a server on the network.