805.50
K-Commander Loss-in-Weight Programming
Rev: G Produced by the K-Tron Institute
Tare and Span Calibration Procedures, Continued
Totalizer
method for
span
calibration
To set the span by using the totalizer is another way to calibrate the
feeder.
Step Action
1 Put the unit into Gravimetric control at some desired
setpoint.
2
With material in the feeder hopper, run the feeder and allow
material to flow from the feeder in a uniform flow pattern.
Be sure that the massflow rate and drive commande are
quite stable. Stop the feeder.
3 Clear the totalizer. Be sure that you have a large container to
catch the flow of material during this run.
4 Start the feeder.
5 When the container becomes full, stop the feeder.
6 Note the totalizer reading
7 Weigh the contents of the container
8 Compare the container weight to the totalizer. They should
match.
9 Calculate the new span setting from the following equation:
New Span =
Current Span*( Container Weight/Totalizer Weight)
ex: Current span = 1.004, Container weight =99 kgs, the
totalizer reads 100 kgs.
New span = 1.004 * ( 99/100) = 0.994
10 Enter the new span.
11 Redo steps 3-9 to check the accuracy of the new span value.
12 You have calibrated the feeder. You can now run the feeder
in production.
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