Set Points within upper and lower limits

Hi, mrsgator 

I am glad to help you.   

According to your description, you want to figure out the DAX to show if the set point is X, upper control limit is Y and the lower control limit is Z, then the independent_sensor_1 is within those limits? 

If I understand you correctly, then you can refer to my solution.  

You can refer to my DAX formula to create a Measure: 

WithinLimits = 
VAR SelectedSetPoint =
    SELECTEDVALUE ( 'Table1'[set_point_1] )
VAR UpperLimit =
    LOOKUPVALUE ( 'Table2'[Upper Limit], 'Table2'[Set Point], SelectedSetPoint )
VAR LowerLimit =
    LOOKUPVALUE ( 'Table2'[Lower Limit], 'Table2'[Set Point], SelectedSetPoint )
VAR WithinOrNot =
    SELECTEDVALUE ( 'Table1'[independent_sensor_1] )
RETURN
    IF (
        WithinOrNot >= LowerLimit
            && WithinOrNot <= UpperLimit,
        "Within Limits",
        "Out of Limits"
    )

This is the result calculated using this DAX: 

 You can also set up a slicer with the different vehicle names: 

I hope my suggestions give you good ideas, if you have any more questions, please clarify in a follow-up reply.
Best Regards,
Fen Ling,
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