David82:
zoomkat:
Your fluke should have some features to allow you to see how low the voltage drops either ysing the max/min capture (100ms resolution) or duty cycle (which may have the shortest measurement interval).It does but why would use that instead of the historical graph? Does the min/max have a much faster cycling time or something?
I don't have your fluke, so I can't do actual test like you should be doing. The bar graph apparently updates 30 times a second, but I assume you will have to be able to visually determine the low voltage value during a very short interval. Where in your circuit have you measured using the bar graph method and what were the results? I would think the duty cycle might be interrupt driven able to capture the shortest interval (the voltage trigger level would have to incremently lowered for each test to find the lowest value).