Fairbanks MATRIX SCALE HIGHWAY SCALE SYSTEM - Manual (Page 36)

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Section 6: Service & Maintenance
MAINTENANCE INSPECTIONS
• Ensure that the system is maintaining proper ground connections.
• Check module-to-module bolts for tightness.
• Check that the frame has not
shifted, and that all bolts are
secure.
• Check for movement or washout
under any temporary pier
structures.
• Check load cells for a level
condition.
• Examine load cell cables and
module interconnect cables for
problems.
• Ensure that the SSCs and the
PPSs covers are secure.
LOAD CELL REPLACEMENT
1. Remove power from the system at the instrument.
2. Lift the scale at the bad load cell location.
3. Remove the defective load cell.
4. Apply a small amount of grease on the load cell (top and bottom), then install it.
5. Gently lower the scale assembly, ensuring proper placement of the load cell.
6. Remove the SSC Enclosure Cover.
7. Loosen the gland nut.
8. Unwire the defective load cell from the SSC, noting the wire color code.
9. Wire the new load cell into the SSC.
10. Tighten the gland nut around the cable.
11. Secure the SSC enclosure latches.
12. Re-apply power to the instrument.
13. Check the scale’s operation, and calibrate it as necessary.
A Test Cart is convenient whenever available.