Trend Monitoring
Relative or absolute trend limits
The trend limits can be set either in relative or in absolute numbers (set this within the Menu-section
under "Monitoring Parameters").
When choosing relative limits (as shown in the graphs on the previous pages), the current trend
value representing the average peak force at that time, will be set to 100% each time you start a
new learn. The trend limits also read in relative numbers. If the lower trend limits is set at 85% (as
shown in the graph on the previous page), the average force is allowed to gradually drop by maxi-
mum 15 percent. If it continues to drop, the machine will be switched off. Working with relative
trend limits has the advantage that the limits can remain active even when you change the machine
over to another product which typically would mean totally different actual forces.
Absolute trend limits are based on the actual force scale the monitor works with (incoming voltage
or calibrated references). Thus, absolute limits typically need to be adjusted every time you change
the product. Absolute trending is mainly designed to be used in conjunction with calibrated sensors.
Upper absolute
trend limit
Trend monitoring
with absolute limits
Trend monitoring
with relative limits
(shown on the
multi trend display)
Current average peak
Lower absolute
trend limit
Trend Monitoring
Trend Monitoring
Duration
Yes
Current average peak
Lower relative
trend limit
Upper relative
trend limit
SK 7
V5.2 E 10/04
SK7-16
