We ran into this a lot when IBM gave everyone a Fluke 8060. Suddenly they had changed all those "zero" readings on floating wires to what I called a random number generator.
My "support" calls spiked.
We also quickly found out the classic difference between "precision" and "accuracy" when guys started comparing their road worn flukes on the same source. After a while it became apparent calibration was a must if you really wanted to believe all the numbers that fluke gave you. Most had an inaccurate reading, "precise" out to 3 decimal places.
A lot of guys ordered the Triplett analog meter that was much smaller than the Fluke and as accurate for most real world measurements

Greg Fretwell