Fluke 289 - Manual (Page 28)

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Users Manual
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the softkey labeled Save to store the MIN MAX screen data. MIN
MAX can not be continued at this point. Press the softkey labeled
Close to exit the MIN MAX mode.
Pressing the softkey labeled Restart while MIN MAX is running
stops the MIN MAX session, discards all MIN MAX data, and
immediately starts a new MIN MAX recording session.
Capturing Peak Values
Peak record is almost the same as MIN MAX record explained
earlier in this manual. The significant difference between the two
recording functions is the shorter response time for peak
recording: 250
μ s. With this short response time, the actual peak
values of a sinusoidal signal are measurable. Transients are
more accurately measured using the peak record feature.
To activate the peak mode, press the softkey labeled Menu.
Move the menu selector next to the menu item labeled Peak,CF
or Peak. Press the softkey labeled Peak to start the peak
recording session.
Restart
119.8 VAC
Stop
Start : 06/07/07 7:00 pm
Peak Max
168.2
118.9
-173.9
Average
Peak Min
Auto Range
500 VAC
V
VAC
00:03:17
01:10:59
01:10:09
V
8:10pm 06/07/07
Peak
est43.eps
Figure 7. Peak Record Display
As shown in Figure 7, the primary display shows the “live”
measurement present on the Meter’s inputs. In the secondary
area of the display, the maximum and minimum peak values as
well as the average value are shown along with their respective
time stamps. The time stamp next to the average value indicates
the elapsed time of the peak recording session. The peak
recording session start time is shown along the bottom of the
page area of the display.
When the peak value of the input signal goes below the recorded
minimum value or above the recorded maximum value, the Meter
beeps and records the new value. At the same time, the elapsed
time since the peak recording session was started is stored as
the recorded value’s time stamp.