Min Max Avg Recording Mode; Autohold Modes; Yellow Button; Display Backlight - Fluke 77 User Manual

Model 77 Series IV
Users Manual

MIN MAX AVG Recording Mode

The MIN MAX AVG recording mode captures the minimum and
maximum input values, and calculates a running average of all
readings. When a new high or low is detected, the Meter beeps.
For dc functions, accuracy is the specified accuracy of the
measurement function 12 counts for changes longer than
±
275 ms in duration.
For ac functions, accuracy is the specified accuracy of the
measurement function ± 40 counts for changes longer than
1.2 s in duration.
To use MIN MAX AVG recording:
Make sure that the Meter is in the desired measurement
function and range. (Autoranging is disabled in the MIN MAX
AVG mode.)
Press MIN MAX to activate MIN MAX AVG mode.
and MAX light, and the highest reading detected
since entering MIN MAX AVG is displayed.
Press MIN MAX to step through the low (MIN), average
(AVG), and present readings.
To pause MIN MAX AVG recording without erasing stored
values, press HOLD.
To resume MIN MAX AVG recording, press HOLD again.
turns off.
To exit and erase stored readings, press MIN MAX for 1
second or turn the rotary switch.
4
Note
is displayed.

AutoHOLD Modes

XWWarning
To avoid electric shock, do not use the AutoHOLD mode
to determine if a circuit is live. Unstable or noisy
readings will not be captured.
In the AutoHOLD mode, the Meter holds the reading on the display
until it detects a new stable reading. Then the Meter beeps, and
displays the new reading.
Press HOLD to activate AutoHOLD.
Press HOLD again or turn the rotary switch to resume normal
operation.

YELLOW Button

Press the yellow button to select alternate measurement functions
on a rotary switch setting, e.g., to select DC mA, DC A, Hz,
capacitance, or diode test.

Display Backlight

Press to toggle the backlight on and off. The backlight
automatically turns off after 2 minutes.
lights.