Fluke 87V FE 83V & 87V Users Manual - Page 39

Zoom Mode (Power Up Option Only) To use the Rel Zoom Bar Graph: 1. Hold down F while turning the Meter on. The display reads "2rEL". 2. Select the relative mode by pressing F again. 3. The center of the bar graph now represents zero and the sensitivity of the bar graph increases by a factor of 10. Measured values more negative than the stored reference activate segments to the left of center; values more positive activate segments to the right of center. Uses for the Zoom Mode The relative mode, combined with the increased sensitivity of the bar graph's zoom mode, helps you make fast and accurate zero and peak adjustments. For zero adjustments, set the Meter to the desired function, short the test leads together, press F; then connect the leads to the circuit under test. Adjust the circuit's variable component until the display reads zero. Only the center segment on the zoom bar graph is lit. For peak adjustments, set the Meter to the desired function, connect the leads to the circuit under test; then press F. The display reads zero. As you adjust for a positive or negative peak, the bar graph length increases HiRes Mode (Model 87) to the right or left of zero. If an overange symbol lights (< >), press F twice to set a new reference; then continue with the adjustment. HiRes Mode (Model 87) On a Model 87 Meter, pressing H for one second causes the Meter to enter the high-resolution (HiRes), 4-1/2 digit mode. Readings are displayed at 10 times the normal resolution with a maximum display of 19,999 counts. The HiRes mode works in all modes except capacitance, frequency counter functions, temperature, and the 250 µs (peak) MIN MAX modes. To return to the 3-1/2 digit mode, press H again for one second. 31