Well, playing a bit with my new multimeter, I have to admit:
Fluke 289 is a great meter, although it should have been updated by Fluke for new hardware nowadays available.
Many said it is slow... whow, are they comparing it to HP-3458?
Comparing to my meters: other Fluke, Yokogawa TY-720 (great meter!), it is by far the fastest. Its capacitor measuring functions, even for high capacitances is ultra fast!
Low ohms is also fast. I can't see where it is not the champion!
At home, some few days ago, I could see the energy fluctuating a lot. Yesterday I put the Fluke to logg for 07h30, taking the measurement each 1min and events threshold on 5% variations.
My Yokogawa is a data-logging multimeter too, but it takes measures at the interval you program it. Others meters act in the same way.
Fluke, on other hand, will take the measures at the intervals you programmed it, but, in an event that goes beyond the threshould value, it takes the measuring too.
And this is not the only difference: the display is turned off and only the power button blinks every 1 ~ 2s.
So, after 7h turned "on", its batteries are just like new.
Comproving my suspects, the graph bellow. At 00h30, aprox., one suddenly drop on voltage, and on second picture, some fluctuations. Very good!