Monarch Instrument DC 2000 - Manual (Page 38)

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Chapter 3 Getting Started
3.3.2 Searching Data By Time
The historic data can be searched by time, by pressing the FINDT (FIND Time) button. This will bring up a
transient window showing the time to be searched. If the displayed time is correct press ENTER, if not press
NO. This will bring up a series of windows to allow the required time to be entered. The Date will then be
displayed. Press NO to change or ENTER to accept. The data will be searched and the sample correspond-
ing to the required 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”. The user can then enter the interactive browse mode by pressing the BROWS button.
3.3.3 Searching Data By Value
The historic data can be searched by value, by pressing the FINDV (FIND Value) button. This will bring up
the Search Value button bar shown in Figure 3-11 below.
To set up the actual Value to search for, press the VALUE button. Use the numeric keypad to enter the value
to search for. Note that you cannot search for an exact match, you will be looking for a value immediately
greater than or less than the value you enter. Once you have entered the value you want, press the ENTER
button.
Before you begin a search, you have to decide which PEN or point to use as the search reference, and which
direction to search in.
Use the PEN button to select the pen trace to search. Each time this button is pressed, the next pen is
selected. The current pen is shown in the status line at the top of the screen, together with the value of the
trace under the cursor and its actual time and date stamp.
The search direction is determined by the button to the left of the PEN button. This button toggles between
BACK and FWD. BACK will search BACKWARDS in time from the current cursor position (into older data),
while FWD 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
FIND< to find the first point LESS than the current search value. Each time either of these buttons is
pressed, the next point that meets the search criteria is found. Note that 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.
Figure 3-11 The Search Value Button Bar