OM6008 02/03 Optional Equipment - Section 6 Payload Meter III Page 6-21 Clean Truck Tare Inclinometer Calibration The payload meter uses the clean truck tare value to calculate carry-back load for each haul cycle. The carry-back stored in the haul cycle record is the new empty tare minus the clean truck tare. The inclinometer calibration procedure is designed to compensate for variations in the mounting attitude of the inclinometer. The inclinometer input is critical to the payload calculation. This procedure should be performed after service to the suspensions or when significant changes are made to the sprung weight of the truck.
Before performing this procedure, be sure the suspensions are properly filled with oil and charged. It is critical to payload measurement that the proper oil height and gas pressure be used. This procedure should be performed on relatively flat ground. Often the maintenance area is an ideal location for this procedure. 1. After cleaning debris from the truck and check- ing to see that the suspensions are properly serviced, use the PLMIII software to connect to the payload meter. Once the clean tare process is started, the payload meter will begin to calculate the clean empty sprung weight of the truck. This calculation continues while the truck drives to the next loading site.
Once the procedure is started, there is no reason to continue to monitor the process with the PC. The truck does not need to be moving to start this procedure. 2. From the "Truck Configuration" screen, select "Inclinometer". 3. With the truck stopped and the brake lock on, press the “Start” button. This instructs the pay- load meter to sample the inclinometer once. 4. Turn the truck around. Drive the truck around and park in the exact same spot as before, fac- ing the other direction. 1. After cleaning debris from the truck and check- ing to see that the suspensions are properly serviced, use the PLMIII software to connect to the payload meter. 5.
With the truck stopped and the brake lock on, press the “Start” button. This instructs the pay- load meter to sample the inclinometer again. The payload meter will average the two sam- ples to determine the average offset. 2. From the "Truck Configuration" screen, select "Clean Truck Tare". 3. Be sure to follow the screen instructions. 6. Be sure to follow the screen instructions.