The BFG capacitance test box has been design to be an affordable and simple-to-use test box for performing capacitance tests on Jet/BFGoodrich/L3 Communications PS-835, PS-850 and PS-855 standby power supplies. This unit features jacks on its front panel allowing technicians to make easier connections to bench top DC power supplies, also the mating connector will plug directly into these power supplies, which it was built for. Simply plug in the BFG, select the “TEST” position, start a stopwatch, and then watch the voltage.