‘Range’ refers to the speed range (gear) of the overhead stirrer. Please refer to your overhead stirrer instruction manual for further details about gearing and speed ranges.
When you add an overhead stirrer in the Apparatus window in AVA, its properties box will appear and at the bottom of the ‘Device Limits and Settings’ section is the range.
In AVA, the range is set to 1 as default, but you can change it to 0. ‘0’ selects stirring speed range 1 and entering ‘1’ selects stirrer range 2.
AVA tells the stirrer which gear to use, and thus alters its stirring speed range accordingly.
You should manually configure the maximum and minimum speed limit values according to which range setting you select for your stirrer.