TM 5-3895-374-10
....................................................................................................................................................... Feeder Calibration
9)
After the sample is taken, verify that the computer totalizer has stopped accumulating.
10)
Compare the actual sample weight with the measured weight. If the measured weight is within tolerance and
recalibration is not required the user can ESCape from this procedure or return to Step 5 and run a subsequent
test.
NOTE:
If the belt scale is known to be accurate at the actual material WTPH test rate then the indicated
belt total can be used as the actual sample weight. If the belt scale accuracy is unknown at the
actual material WTPH test rate then the sample material should be collected in a truck and the net
truck weight used as the actual sample weight.
11)
Select Option 8 to recalibrate the feeder to the actual weight. See Figure 8684.4 If the user enters an actual total
different from the displayed measured total, the feeder span calibration value will automatically be recomputed so
that, if the test could be repeated exactly, the measured total would now equal the actual total entered.
12)
As necessary, verify the new span calibration by repeating this procedure starting at Step 2.
13)
Upon satisfactory calibration, verify that no other span numbers have changed from the original data printed in
Step 3.
NOTE:
Feeders must be calibrated with the actual material that will be used in that feeder. Each
material/feeder combination must be calibrated.
page F - 97
SYSTEMS Equipment Corp. 8/31/89 Page (51)
