Fluke 28IIEX Fluke 28IIEx User Manual - Page 45

MIN MAX Recording Mode The MIN MAX mode records minimum and maximum input values. When the inputs go below the recorded minimum value or above the recorded maximum value, the Product beeps and records the new value. This mode can be used to record intermittent measurements, record maximum measurements while you are away or record measurements while you operate the equipment under test and cannot look at the Product. MIN MAX mode can also calculate an average of all measurements since the MIN MAX mode was started. To use MIN MAX mode, refer to the functions in Table 8. Response time is the length of time an input must stay at a new value to be recorded. A shorter response time records shorter events, but with decreased accuracy. All recorded measurements are erased when you change the response time. The Product has 100 millisecond and 250 μs (peak) response times. The 250 μs response time is indicated by "" on the display. The 100 millisecond response time is best for power supply surges, inrush currents, and intermittents. The average value (AVG) shown in the display is the mathematical integral of all measurements since the start of recording (overloads are discarded). The average value is useful to smooth out unstable inputs, calculate power consumption, or to get a percentage of time estimate on how long a circuit is on. True-rms Digital Multimeter MIN MAX Recording Mode Min Max records the signal extremes that are longer than 100 ms. Peak records the signal extremes that are longer than 250 μs. Smooth Feature (Power Up Option Only) When the input signal changes quickly, "smoothing" gives a more stable measurement on the display. To use the smooth feature: 1. Hold down C while you turn the Product on. The display shows "'---" until C is released. 2. The Smoothing icon () will appear on the left side of the display to let you know that smoothing is on. 35