17Moxi battery door replacementRemoval1. Use the small silver tool to push the pin out.2. Remove the battery door.Installation1. Line up the battery door.2. Insert the pin. Use the back of the small silver toolto push the pin in.How to measure performance in a couplerRIC devices should be measured with a HA1 couplersince it best reflects the acoustical properties in the earcanal.The xReceiver kit includes a metal adapter plate thatfits on a HA1 coupler and allows for a good connectionof the xReceiver unit to the coupler.Select Activate Test Box Measurement Mode in UnitronTrueFit from the menu on the top menu bar. Clickingon Activate Test Box Measurement Mode disables theadaptive features and activates the omnidirectionalmicrophone mode to allow for correct measurements.Click on Deactivate Test Box Measurement Mode toreestablish the previous settings.Attach the Standard xReceiver to the metal adapter plate.