ZBrushCentral

Displacement map value in 3dsmax

I’ve got my 32bit displacement map (with mid level set to 0) generated in Zbrush.

Now I’ve got to establish the exact strength value (which I guess it corresponds to the highest point in the zbrush subdivided geometry) to apply correctly to the displace modifier(or shader) in 3dsmax 2016. How do I do that, without Nuke?