I temporarily connected the current sensor to one of the TuxGraphics 3 digit meters and turned it on. I modified one of the included sample programs for the calibration and got what I expected for a change!
8 AA batteries to a set of resistors didn't exercise the whole range, but I did get something both plus and minus by switching the battery leads.
Thinking back, I don't believe I got the right numbers, 4 ohm and 10 volts=2.5A and 2 ohms should have been 5A but I remember 2.3. Maybe the batteries died faster than I got the measurements?
But at least the magic smoke stayed inside the little boxes this time!
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