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Page 3-20
Chapter 3 Getting Started
The search direction is determined by the button to the left of the
PEN
button. This button toggles between
BACK
and
FRWD
.
BACK
will search BACKWARDS in time from the current cursor position (into older data),
while
FRWD
will search FORWARDS in time from the current cursor position (into newer data).
To initiate a search press either the
FIND>
button to find the first point GREATER than the search value, or
the
FIND<
button to find the first point LESS than the current search value. Each time either button is pressed, the
next point that meets the search criteria is found. Once a point is found, the next point to be found will be the
one that is after the first point that does not meet the criteria. The search “hops” across all other values so that
you are not bogged down finding useless information. Therefore if you are searching for a point on a sine wave,
for example, you will find the same point on the same phase of the wave (360° apart). Otherwise you would find
every point less than or greater than the search point which could be every point in the trend.
The point that meets the search criteria will be placed under the cursor near the center of the screen. The
search may take some time, especially if searching a large disk file. If no point is found, the unit will display
“No Point Found”. The user can continue to search for other points in the same direction or change direction
and search again. Once an acceptable point is found, the user can enter the Interactive Browse Mode by first
pressing the
EXIT
button to return to the
Browse Mode Button Bar
and then
pressing the
BROWS
button.
3.13.3 Searching Data By Time
To Search the historic data by Time:
From the Browse Mode Button Bar, press the
FINDT
(FIND Time) button. This will bring up a pop up window
showing the Time to be searched. If the displayed Time is correct, press the
ENTER
button. Otherwise, press
the
NO
button to bring up a series of windows enabling the desired Time to be entered. Press the
ENTER
button until the desired Time is displayed and then press the
ENTER
button again to display the Date. Press
the
ENTER
button to accept the Date or the
NO
button to change the Date. A series of windows will be
displayed to change the Date. Press the
ENTER
button until the desired Date is displayed and then press the
ENTER
button again to search the data. The sample corresponding to the desired Time and Date will be placed
under the cursor near the center of the screen. The search may take some time, especially if searching a large
disk file. If no point is found, the unit will display “No Point Found”. Once an acceptable point is found, the user
can enter the Interactive Browse Mode by pressing the
BROWS
button.
3.13.4 Interactive Browse Mode
The Interactive Browse Mode enables the user to uniquely identify points on the screen by Time, Date and
Value and move around in time. Once the browse source has been selected (from File or RAM), pressing the
BROWS
button again, immediately or after a search or compress operation, will enter the Interactive Browse
Mode and the
Interactive Browse Button Bar
shown in Figure 3-17 below will appear.
The cursor appears near the center of the screen. It can be moved with the
UP (
↑↑↑↑↑
)
or
DOWN (
↓↓↓↓↓
)
button (shown
above) in the Vertical mode, or with the
LEFT (
←
←
←
←
←
)
or
RIGHT (
→
→
→
→
→
)
button in the Horizontal mode. Pressing these
buttons a single time moves the cursor one sample at a time, while holding these buttons will cause the cursor
to move in 10 sample increments. As the cursor moves, the Time and Date information is updated in the Status
Line at the top of the screen. To move about in larger increments, the
PAGE-
and
PAGE+
buttons move the
data forward or backward an entire screen at a time.
Figure 3-17 The Interactive Browse Button Bar
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