Fluke 287 Fluke 287 and 289 Multimeter Users Manual - Page 28

Capturing Peak Values, Peak Record Display

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287/289 Users Manual 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 μs. 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. 18 8:10pm 06/07/07 Peak 119.8 VAC Auto Range Peak Max 168.2 V 500 VAC 00:03:17 118.9 Average VAC Peak Min -173.9 V 01:10:59 01:10:09 Start : 06/07/07 7:00 pm Restart Stop Figure 7. Peak Record Display est43.eps 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.

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287/289
Users Manual
18
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.