Select Drum Interlock switch to BYPASS.
Clear (00), clear (00).
Start test (6).
The feeder selected will start and run for the selected time interval.
At the end of the test and after all aggregate has crossed the scale.
Correct totals (9).
The correction has been effected to the expected flow rate.
Enter actual tons as displayed by "virscale".
Error calculator (8).
Enter indicated tons from "measured feeder totals by control".
Enter virscale value in the actual.
The percent error will be displayed.
Repeat this process until the error is less than one half of one percent.
Proceed with the remaining feeders.
Return to the main feeder calibrations screen which should be displaying the expected maximum
flow rate of each bin.
Print a record of these values.
3. Asphalt Pump Calibration Procedures
This procedure is performed when there is asphalt in the tanker, at operating temperature, and the hot oil heater is
circulating transfer fluid through the jacketed lines and pumps.
Position calibration tank on level ground half way between the asphalt tanker and the feed
conveyor (no further than fifteen feet from the metering pump). (See figure 2-29).