The Electron-Muon Ranger (EMR) is a fully-active tracking-calorimeter used to tag muons that have decayed in flight inside the cooling channel of the Muon Ionization Cooling Experiment. It consists of 2832 plastic scintillator bars segmented in 48 planes, in an X-Y arrangement, with dual readout. Multiple analyses were conducted to characterize the EMR hardware. The clear fibres coming from the bars were shown to transmit the desired amount of light. Two channels were shown to have been mismatched during assembly and the DAQ channel map was corrected accordingly. The level of crosstalk was within acceptable values for the type of multi-anode photomultiplier used with an average of 0.20±0.03% probability of occurrence in adjacent channels and a mean amplitude equivalent to 4.5±0.1% of the primary signal intensity. The signal acquisition efficiency, defined as the average probability of a muon producing a signal in a plane that it crosses, was 99.73±0.02%.