OM6005 11/01 Optional Equipment - Section 6 Payload Meter II Page 6-17 Checking the G t setting: This procedure causes the PLM II to calculate a new empty 'tare' (calibration) weight (refer to "View- ing Payload Calculation Inputs) for use with all sub- sequent payload estimates. Before calibrating, confirm the truck nose up produces a positive incline. Calibrating a Truck Refer to "Checking the Gain" and "Adjusting the Gain" for display and adjustment information. Checking the Inclinometer Settings Refer to "Viewing Payload Calculation Inputs" for instructions on displaying truck pitch angle.
With an empty truck on level ground and suspensions prop- erly charged, the display should indicate 0.0 ± 1.0. Remember, this is not a live display. After adjust- ment, Service Check Mode must be entered again to obtain a new reading. The payload meter should be calibrated whenever one of the following occurs: 1. When a new payload meter is installed. 2. When a suspension sensor has been changed. 3. Whenever the suspensions have been serviced or the Nitrogen levels have changed. An alternative method is to use a personal computer running the Komatsu Payload Download Program for Microsoft Windows. The "Monitor Pressures" section of the program displays live inclinometer data.
The inclinometer can be loosened and adjusted until the live display shows 0.0 ± 1.0 degrees with an empty truck on level ground, and the suspensions properly charged. 4. Whenever any major change to the truck has been performed that would change the empty vehicle weight. 5. Once a month thereafter. To calibrate the payload meter: Another method is to use a voltmeter to read the volt- age output of the inclinometer. With an empty truck on level ground, and the suspensions properly charged, the output voltage should be 2.6 ± 0.1 volts. 1. With the engine running and the truck stopped, press and hold the CAL/CLR switch until "CAL" is flashing on the display. 2.
Drive the truck until the speed is approximately 6-10 MPH (10-15 Km/H) 3. Press the CAL/CLR switch once. 4. Drive until the display switches back to the time of day. This will take up to 30 seconds. >Carry out this operation on flat level ground. >Travel in a straight line. >Maintain a steady speed, 6-10 MPH (10-15 Km/H) 5. The payload meter is now calibrated and ready for normal operation.