fixed get_update_period
fixed get_update_period

USGSDenverPychron/pychron,USGSDenverPychron/pychron,NMGRL/pychron,NMGRL/pychron,NMGRL/pychron,USGSDenverPychron/pychron,USGSDenverPychron/pychron,NMGRL/pychron