Maintenance - Siemens Milltronics MMI Instruction Manual

Maintenance

Keep each weighbridge clean. Accumulation of material between the fixed support
frame (static) and the live frame (dynamic) as well as around each load cell could affect
the scale accuracy.
Periodically check the alignment of the stringers and idlers in the weighing area.
When a problem arises in the conveyor, it is possible that the scale will be affected.
Therefore, periodic conveyor maintenance is important to proper scale operation which
should include:
• lubrication of all pulleys and idlers
• proper belt tracking and training
• proper belt cleaning and scraping
• proper take up operation
• proper material feeding and spillage
• control.
You can observe the integrity of the load cells by performing zero and span calibrations. If
the zero and span deviations display a continuous unidirectional drift or the system
becomes uncalibratable for no apparent mechanical reason, the load cells may be
suspect.
Spare Parts
The only spare part recommended for the MSI is the load cell. Refer to the load cell
nameplate for the proper size and model number.
Re-balance any load cell that has been replaced. Refer to the Load Cell Balancing
Procedure For Four Load Cells in the integrator manual.
Maintenance Precautions
• When welding near the scale, do not allow current to pass through the belt scale.
• Reset the shipping stops to reduce physical shock to the load cells during
maintenance.
• Recalibrate the scale after maintenance and prior to use.
7ML19985DR02 Milltronics MMI Belt Scale – INSTRUCTION MANUAL Page 13