REFS Minimums Warning occurring at 120 ft and 20 ft AGL

[KirkR]

Looking for assistance to identify why minimums would be reported lower than expected.  Scenario is:

KMBS ILS 23
No ATIS - used std BARO 29.92. (note also had same result @ KDTW using the ATIS reported altimeter)
Set RA and RA in REFS config (noted that no warnings occur when setting to BARO, but I believe RA radar alt is the correct one to use generally?)
Following images and video show more supporting detail.

Are both BARO and RA operational in the simulation (per comment above)?
Is there supposed to be a visual indication of the decision height on the PFD when these are configured?

Supporting visuals/video:

Be sure to use settings to maximize resolution for the video.  HD should be available by the time anyone pulls this up.

As always, thank you.

 

 

Edited July 27, 2022 by KirkR

[rjb4000]

You should use baro minimums unless the approach specifies the use of RA minimums (see a CAT II or III ILS for an example). 
 

For the KMBS ILS 23, you should set baro minimums of 870’ in the reference window. When the aircraft descends below that altitude, the minimums alert will sound. 
 

The reason your minimums alert went off at 5 feet is because the minimums reference was set to 5.

 

Edited July 27, 2022 by rjb4000

[KirkR]

Thanks so much for taking the time to reference that section in the 605 document.  I should have found that as I do have that document.

Kirk 

[flyingfudge]

If you wanted to use RA minimums it should be set at 200 RA which is the figure in brackets ( height equivalent ) next to the 861ft DA on the approach plate. RA minimums are used for CAT II and CAT III approaches.

Edited July 27, 2022 by flyingfudge