Wintriss autoset 1500, User Manual

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AutoSet User Manual 1137200
Calibration 3-19
12.
Move the lever on switch S102 back to the “OPERATE” position. Your AutoSet load
analyzer is now ready to use.
Checking Linearity
After you calibrate your AutoSet, you can check to see whether tonnage readings increase
proportionally with increases in load. For example, if AutoSet reads 40 tons when 40 tons is
applied to the load cells, it should read 80 tons when 80 tons is applied to the load cells. The
proportional increase of tonnage readings with increasing load is called “linearity.” Linearity
is a good measure of how accurately tonnage is being recorded at different loads.
To check linearity, change the load on the press. For instance, if you calibrated AutoSet at
75% of press capacity, reduce the load on the load cells to about 45%. If you calibrated at
50%, decrease the load to about 30%. When you compare the new load readings on the
AutoSet with the load displays on the calibration unit, readings should continue to be
identical.
If tonnage readings on the AutoSet and calibration unit disagree at the new load settings, there
may be a problem with the positioning of your strain links, or the press may be experiencing
twisting forces. Consult your service representative, or contact Wintriss Tech. Support. Note,
however, that perfect linearity is unachievable. Typically, tonnages are accurate within 5% to
10% at 20-80% of press capacity.
Figure 3-10. AutoSet Label Showing Locations for Recording Calfactors and Jumper Settings