I'm using [nRF52_SDK_0.9.2] and original module. As a tool, I use the keil.
"NRF_POWER-> SYSTEMOFF = 1;" in the SDK example hrs also written, does not enter the system off mode (current value does not decrease).Written location is "main.c". and I add it after; "conn_params_init ()".
By the way, when you insert it into the "blinky" enter the system off mode (down the current value)
Why not enter the system off mode "hrs"?