UP Factor - Payload Calculation Gain Careful consideration must be given to the use of PL:01 and PL:10. These modes divide the data trans- mitted by Modular Mining and the data stored in the payload meter’s memory. Additionally, each mode handles the UP factor differently and can calculate different loads for the same haul cycle. For these reasons it is recommended that the payload meter be set to use PL:00 in all cases. Description of UP Factor The payload calculation gain, or UP factor is multiplied to the actual calculated load. From the example shown in Figure 20-4, the calculated load is 143.8 tons. If the UP factor is set to +5% the displayed load will be 143.8 x 1.05 = 151 tons.
This factor can be used to minimize the effects of systematic error for a particular truck. The UP factor is not applied uniformly to all load calcula- tions. There are three operating modes for the payload meter and the UP factor is applied differently to each mode. Therefore, it is recommended that this percent- age be set to 0. There are significant differences in final calculated load that can be introduced by adjusting this gain. PL:00 Modular Mining Transmission - The data is captured at the last transition from 0 to 1 MPH prior to traveling 160 meters from the shovel. The captured data is transmitted when the truck travels 160m from the shovel.
This load calculation will use the UP factor percentage. Memory Storage - Same as above, the data is cap- tured at the last transition from 0 to 1 MPH prior to traveling 160 meters from the shovel. The captured data is stored into memory when the body rises at the dump. This load calculation will use the UP factor percentage. Payload meters sent from the factory are typically set to "UP: 5" indicating a +5% gain in final load. This should be checked on all new meters and changed to "UP: 0". PL:01 PL Mode - Load Calculation Timing Modular Mining Transmission - The data is captured at the last transition from 0 to 1 MPH prior to traveling 160 meters from the shovel.
The captured data is transmitted when the truck travels 160m from the shovel. This load calculation will use the UP factor percentage. Load Calculation Timing The PL mode controls when the payload meter takes a sample of the data and calculates the load. There are three modes available. There are two sets of data that are affected by the PL mode setting. Memory Storage - The data is captured and stored when the body rises from the frame. This calculation will not use the UP factor percentage. Modular Mining Transmission Memory Storage PL:10 The PL mode setting can have a significant impact on the perceived accuracy of the payload meter.
Modular Mining Transmission - The data is captured and transmitted when the truck travels 160 meters from the shovel. This calculation will not use the UP factor percentage. PL:00 is the only recommended setting. Memory Storage - The data is captured and stored when the body rises from the frame. This calculation will not use the UP factor percentage. Use of settings other than PL:00 is NOT recommended. M20-26 Payload Meter II M20007.1 03/02