import ch.psi.pshell.epics.ChannelDouble as ChannelDouble


channel = ChannelDouble("test_inv", "SARUN15-UIND030:INVALID-PV", -1, True, InvalidValueAction.Nullify)
avg = create_averager(channel, 5, interval =2.0, name = "avg")

channel.monitored = True
add_device(channel, True)
add_device(avg, True)