Zoom Mode (Power Up Option Only); Uses For The Zoom Mode; Hires Mode (28 Ii) - Fluke 27-II User Manual

Zoom Mode (Power Up Option Only)

To use the Rel Zoom Bargraph:
1. Hold down  while turning the Meter on. The
display reads "2rEL".
2. Select the relative mode by pressing
3. The center of the bargraph now represents zero and
the sensitivity of the bargraph 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 bargraph'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
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 bargraph is lit.
For peak adjustments, set the Meter to the desired
function, connect the leads to the circuit under test; then
press  . The display reads zero. As you adjust for a
positive or negative peak, the bargraph length increases
to the right or left of zero. If an overange symbol (< >)
lights, press
continue with the adjustment.

HiRes Mode (28 II)

On a Model 28 II, push  for one second to enter the
high-resolution (HiRes) 4-1/2 digit mode. Readings are
 again.
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 s (peak) MIN MAX
modes.
To return to the 3-1/2 digit mode, push  for one second.

; then
Digital Multimeters
HiRes Mode (28 II)

twice to set a new reference; then
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