Abstract: Systems can include a mobile device, an accessory configured to generate data representative of at least one parameter of a device under test, and an isolated test block comprising at least one input for interfacing with the accessory and an output configured to communicate accessory output data. The mobile device can include a display and be configured to receive the accessory output data from the isolated test block and to present a display based at least on received accessory output data. The accessory output data received by the mobile device can be electrically isolated from the accessory to provide protection to a device user and the mobile device.

Abstract: Systems can include a mobile device, an accessory configured to generate data representative of at least one parameter of a device under test, and an isolated test block comprising at least one input for interfacing with the accessory and an output configured to communicate accessory output data. The mobile device can include a display and be configured to receive the accessory output data from the isolated test block and to present a display based at least on received accessory output data. The accessory output data received by the mobile device can be electrically isolated from the accessory to provide protection to a device user and the mobile device.

Abstract: A floor cleaning apparatus includes a housing. A dirt collection vessel with filter and a suction generator are carried on the housing. The floor cleaning apparatus also includes a four port/two position directional control valve and a valve actuator. The valve actuator selectively displaces the directional control valve between a first position wherein dirt and debris is captured in the dirt collection vessel by the filter and a second position wherein clean air purges dirt and debris from the filter into the dirt collection vessel.