Material Tests Perform material tests to verify the accuracy of the of the span calibration. If the material tests indicate a repeatable deviation exists, a manual span adjust (P019) is then performed. This procedure automatically alters the span calibration and adjusts the test load (P017) value, yielding more accurate span recalibrations. Note: Test weights are NOT used during material tests. 1. Run the belt empty. 2. Perform a zero calibration. 3. Put the BW100 into RUN mode 4. Record the BW100 total as the start value _ _ _ _ _ _ 5. Run material at a minimum of 50% of design rate over the belt scale for a minimum of 5 minutes. 6. Stop the material feed and run the conveyor empty. 7.
Record the BW100 total as the stop value _ _ _ _ _ _ 8. Subtract the start value from the stop value to determine the BW100 total 9. Weigh the material sample if not already known. kg / lb 0 start total BW500 scale kg / lb BW500 stop total scale BW100 total = _ _ _ _ _ _ material sample weight = _ _ _ _ _ _ • Calculate the span adjust value: % span adjust = BW100 total - material sample weight x 100 material sample weight Recalibration Page 30 Milltronics BW100 - INSTRUCTION MANUAL 7ML19985DJ01