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Service and maintenance
7.1
Maintenance
Keep the weighing equipment 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 cannot be
calibrated for any apparent mechanical reason, the load cells may be damaged.
7.2
Replacing a load cell
Re-install the shipping stops during maintenance or any other time when protection of the
load cells is required.
Note
The load cell stop is set at the factory to allow the load cell to deflect up to 150% of its design
load (30 mV at 10 V DC excitation). The overload gap for a replacement load cell should be
set by mV readings.
1. Support the belt from above or below.
2. Remove the deck assembly.
3. Remove hardware from the dynamic (moving) parts.
4. Remove hardware from the static support.
5. Remove the existing load cell from the belt scale.
6. Replace with a new load cell fastening to static support then dynamic (moving structure).
7. Replace deck assembly.
8. Remove belt support.
9. Adjust deck alignment if necessary.
10.Perform balance, zero, and span calibrations.
Milltronics WD600
Operating Instructions, 09/2016, A5E38964753_AB
CAUTION
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