Optional Equipment - Section 6 11/01 OM6005 Page 6-4 Payload Meter II PAYLOAD METER II ON BOARD WEIGHING SYSTEM (OBWS) GENERAL INFORMATION ple of suspension and inclinometer data. After trav- eling 160 m (0.10 mi.) from the loading site, the PLM II uses the data sampled under the shovel to cal- culate final payload. The Payload Meter II (PLM II ) On Board Weighing System displays and records the payload weight along with other operating information. The system consists of a payload meter, pressure sen- sors, deck mounted lights and an inclinometer. The PLM II displays payload on its display when the truck is stopped.
For the first 160 m (0.10 mi.) after loading, the payload meter displays distance from the loading site. At all other times when the truck is moving, the display shows the time of day. The payload meter (Figure 6-1) uses the four sus- pension pressures and an inclinometer to determine the load in the truck. The payload weight can be dis- played in short tons or metric tons. The payload meter stores in memory various oper- ating data. This data includes: Haul Cycles payload, time, distance, and travel speed for each cycle The beginning of a new haul cycle starts at the dump, when the body comes down from dumping the last load.
date and time that the engine was started and stopped At the loading site, the PLM II begins to calculate the size of each shovel pass (swingload) once the payload is greater than 10% of rated load for the truck. There are three external deck-mounted lights on each side of the truck. The lights indicate pay- load weight divided into three separate stages. A forecast feature will flash a deck mounted light pre- dicting the payload weight if the next bucket of material is dropped into the body. date and time of each fault that occurred or was canceled total payload and the overall number of cycles for a specific time period This data is retained even when the power is switched off.
The stored data is backed up by an internal battery. The data can be down loaded from the payload meter to a personal computer when a communica- tion cable is connected to the port inside the cab. At the moment the wheels be gin to turn after loading under the shovel, the PLM II takes one sam- FIGURE 3-1. PAYLOAD METER II 1. Display panel 2. Reception pilot lamp (Rx busy) 3. Transmission pilot lamp (Tx busy) 4. Memory card access lamp (CARD busy) 5. Mode switch [MODE] 6. Calibration/clear switch [CAL] [CLR] 7. Total/shift switch [TOTAL] [SFT] 8. Light/increment switch [LIGHT] [INC] 9. Memory card 10. Cover 11.
Diagnostic/Download Port WARNING - When not inserting or removing memory card (9), always keep the cover (10) closed)