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Programming Function Blocks and Features
Video Recorder – User Manual 153
Table 4-56 Paper Chart Speed Equivalents to Time Base Selections
Instrument
Time/Screen
Paper Chart Vertical Trend
cm/hour (inches/hour)
Paper Chart Horizontal Trend
cm/hour (inches/hour)
5 minutes 154 (60.6) 246 (96.8)
15 minutes 51.3 (20.2) 82 (32.2)
30 minutes 25.6 (10.1) 41 (16.2)
1 hour 12.8 (5.1) 20.5 (8.1)
2 hours 6.9 (2.7) 10.25 (4.0)
4 hours 3.4 (1.34) 5.1 (2.0)
8 hours 1.6 (0.63) 2.56 (1.0)
24 hours 0.53 (0.21) 0.85 (0.33)
7 days 0.076 (0.03) 0.122 (0.048)
31 days 0.017 (0.007) 0.027 (0.011)
Set Up Trend 2 - 3 - 4
See Table 4-55 for prompts. For Point #1 - Point #12, enter a second group of up to 12 points that will
be displayed as a horizontal or vertical trend.
Log scale trending
This feature enables trending of logarithmic trending on the video chart. This feature is enabled by the following
rules :
1. Programming the decimal point for trend point #1 as X.XXEXX and then trend point #1 and any
subsequent trend point that also has X.XXEXX as the decimal point will be plotted logarithmically
with the number of log divisions derived automatically from the low and high limit of point #1.
2. Setting up the trend display limits decimal position to be X.XXEXX and then any trend point that
also has X.XXEXX as its decimal position will be plotted logarithmically with the number of log
divisions derived automatically from the low and high of the first trend point found with X.XXEXX
decimal position.