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2.4 Operation data
2.4.1 Trends
Trends describe the crusher's actual values. The horizontal axis indicates time and the
vertical axis the actual system value at the specific moment. The time scales you can
choose between are 6 minutes, 60 minutes, 6 hours, and 24 hours.
The vertical axis scales itself automatically to give the most precise view possible. For
example, if the highest power value during the last six minutes has been 182 kW, and the
motor’s maximum power is 250 kW, the screen shows the axis from 0 to 200 kW.
Over each time scale you will have 180 samples. The sample values of longer time scales
are calculated average values of the samples over the shorter time scales. The sampling
times are shown in the table below.
Time scale Sampling period
6 minutes 2 seconds
60 minutes 20 seconds (average of ten 2 second samples)
6 hours 120 seconds (2 minutes - average of six 20 sec. samples)
24 hours 480 seconds (8 minutes - average of four 120 sec. samples)
Reading trends:
•
Enter crusher control display (press F1 in main menu).
•
Select LOGBOOK (press F3).
•
Choose trends (press F1)
•
Press F7 to exit.
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