Problem with HLK-2412 range

[lacrimal]

Well i see problem with 2412, i'm not sure it wipes out all settings including backround noise but since a while it's detection range radically decreased to about 4m. No mater it is set to maximum range or minimum range - over 4m 'moving target' is not existent while 'static target' is as statistical error, not triggering default pins even when zones from 3 to 13 are set to 5.

Maybe there is problem with background noise settings because i can almost swear that first few times running this device I was getting 'moving target' detection distance above 7m.

Is there possibility to wipe background noise settings programmatically ?
Maybe this is the problem.