About Belt Scale Calibration

The truck is then weighed and its net weight compared to the belt scale totalizer. Corrections are made as necessary until the net truck and belt scale weights are equal. The following procedural steps are concerned primarily with operation of the computer and assume that the operator has made ready the proper equipment. See also Appendix G.

In the weighed load procedure, actual material is run across the belt scale Calibration and collected in a truck.

1) Run the equipment until it will respond stabily and uniformly.

2) Set up an unused formula for one or more belt weigh feeders to supply the desired test aggregates at rates up to the maximum plant capacity.

3) Print a current copy of the meter calibration values. (keystrokes 8659)

4) Obtain a stable belt scale zero.

5) Go to the Aggregate Scale Calibration display. (keystrokes 8654.00)

6) Select Option 4 to set the desired Test Parameters. See Figure 8654.2

The Continuation Options are: OPTION/ESCape---- KEY/ESC------ DESCRIPTION/Return to the previous display.

Edit (all) Enter the test parameters shown. Specify the mix # set up in Step 2 above. Specify the desired test rate. Specify a desired test interval that will fill the sample truck or a large value and manually stop the test when desired. ESCape when all the desired test Parameters have been entered.

7) Select Option .00 to display the CAUTION screen from which the totalizers can be zeroed. Zero all totals.

8) When ready to start the test, first verify that the displayed scale rate is near zero and that the totalizer is exactly zero.

9) Select Option 7 to start the feeders. See Figure 8654.3

The belt weigher calibration options are: OPTION/ESCape-----KEY/ESC-----DESCRIPTION/Stop the feeders in timed sequence.

The test interval will decrement every second. When this time interval reaches zero the feeders will stop automatically. The feeders will be stopped or started in timed sequence.