SM3000
Multipoint Videographic Recorder
4 Operation
IM/SM3000–EN Rev. L
17
Note.
Applicable only to Vertical and Horizontal Chart views.
Use the 'Screen Interval' to change the amount of data displayed on the screen. A longer
screen interval displays more data, a shorter screen interval displays data over a shorter
time period, but in more detail. In both cases, the full trace is preserved by plotting the
maximum and minimum samples for each display point.
The screen intervals available in the menu are determined by the faster of the primary
and secondary sample rates set for the process group during configuration – see
Section 6.5.1, page 76. Unavailable screen intervals are greyed-out.
Table 4.1 shows the relationship between sample rate and screen interval for the Vertical
and Horizontal Chart views.
Note.
A 'Please Wait' message appears in the status bar while the instrument retrieves
data from storage.
Selecting a different screen interval does not affect the rate at which data is
sampled.
When in historical review mode, changing the screen interval causes the time at
the cursor position to change.
Circular Chart View
Vertical Chart View
Horizontal Chart View
Chart Duration
Fastest Sample Rate
Screen Interval
Fastest Sample Rate
Screen Interval
Fastest Sample Rate
9 minutes
0.1 seconds
48 seconds
0.1 seconds
70 seconds
0.1 seconds
30 minutes
0.1 seconds
4 minutes
0.1 seconds
6 minutes
0.1 seconds
1 hour
1 second
8 minutes
0.1 seconds
12 minutes
0.1 seconds
2 hours
1 second
12 minutes
0.1 seconds
17 minutes
0.1 seconds
3 hours
1 second
20 minutes
0.1 seconds
30 minutes
0.1 seconds
4 hours
1 second
30 minutes
1 second
45 minutes
1 second
6 hours
1 second
1 hour
1 second
1.5 hours
1 second
8 hours
1 second
2 hours
1 second
3 hours
1 second
12 hours
1 second
4 hours
10 seconds
6 hours
10 seconds
15 hours
1 second
8 hours
10 seconds
12 hours
10 seconds
16 hours
1 second
12 hours
10 seconds
18 hours
10 seconds
1 day
1 second
16 hours
10 seconds
1 day
10 seconds
2 days
10 seconds
1 day
20 seconds
1.5 days
20 seconds
4 days
20 seconds
2 days
40 seconds
3 days
40 seconds
8 days
40 seconds
6 days
60 seconds
9 days
60 seconds
32 days
140 seconds
14 days
140 seconds
21 days
140 seconds
Table 4.1 Sample Rates and Screen Intervals
Shorter interval
= more detail
Longer interval =
better overview