988K, 990K, 992K and 994K Wheel Loaders Cat® Production Measurement Application / VIMSTM Network Manager Caterpillar

Weigh Range Setup

The weigh range is the range of the linkage that measures the payload while raising the linkage. For accuracy:

• The machine must not be digging.

• The linkage must not be accelerating in the weigh range.

Illustration 1	g03750054
Weigh range

For best accuracy, allow 20% lift height between the start of lift and the start of weigh range.

• 20% will eliminate the effects of acceleration during lift.

• Lift acceleration looks like additional weight to the payload system.

This range must be adjusted from the default if:

• End of dig or start of lift is higher than 30% (Adjustment: Raise Start of Weigh Range).

• Final height is below 65% (Adjustment: Lower Start of Weigh Range).

Software configuration parameters in the Implement Configuration screen of Cat^® Electronic Technician (Cat ET) are:

• Payload Weigh Activate Lift Position = Start of weigh range - (50% default)

• Payload Weigh Range Configuration = Size of weigh range - (15% default)

To view linkage position in % and set the weigh range in the Information Display, follow this path: Machine > Settings > Payload > Set Weigh Range.

Reference: Systems Operation, Payload Menu

Improper Settings

The possible negative effects of improperly setting the Weigh Range must be understood. The weigh range should be set to an area that allows the smoothest operation to occur. The following table lists the possible problems that may occur from incorrectly adjusting the weigh range.