With all due respect to a prior respondant, there is *no* value in watching the needle "jump rate" as the sensor is selected, again with all due respect that shows a lack of understanding of how a jeweled meter movement functions. All you are seeing is the mechanical aspect of the meter movement *itself*, IE the strength of the spring that returns the needle to zero when voltage is removed. The rate of the needle moving back to the measured position is again simply a mechanical spring function of the meter movement and has no bearing on cell viability. None, zero, zippo, nada, got it? If anyone was told otherwise by the OEM, it's a matter of simple salesmanship. Just ain't so. Not the first time that people promote what they happen to have on hand as a "design feature".....
Dave Sutton