Use
var visibleScaleRangeSlider = new VisibleScaleRangeSlider({
map: map,
maxScale :5000,
minScale : 600000
}, "sliderdiv");
or after it's created use
visibleScaleRangeSlider.set("maxScale",5000);
visibleScaleRangeSlider.set("minScale", 600000);
doc is not very clear on this and will be updated to indicate how to use this. Layer will still display, zooming and map scale needs to be wired up by user. VSR slider is used to handle scale values. Wiring still needs to be handled for the map zoom levels.