LW Scientific LWPS - 6
LW Scientific · Model LWPS - 6
Pipette Shaker LW Scientific pipette shakers easily achieve consistent results in specimen separation and are especially effective for blood preparation. The LWPS 6 place shaker has the option of either continuous motion or timed motion using the 15 minute timer.
Key tips
- ·Run QC controls before trusting any repair - an analyzer that passes self-test can still report clinically wrong results.
- ·Rule out a reagent lot change before opening the instrument - it can look exactly like a hardware fault.
- ·Centrifuge rotors have a hard retirement age/cycle limit regardless of visible condition - don't eyeball it.
Typical Failure Modes
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
Motor will not run / no oscillation
HighSymptoms: Platform does not shake when switched on.
Root cause: Failed drive motor, on/off switch, or the 15-minute timer contacts.
Weak or uneven agitation
MediumSymptoms: Shaking amplitude low, one side moves less, tubes not mixing.
Root cause: Worn eccentric / drive linkage or loose platform hardware.
Timer fault
LowSymptoms: Timed mode does not stop, or stops immediately; continuous mode still works.
Root cause: Worn mechanical 15-minute timer.
Excessive noise / walking
LowSymptoms: Rattle, unit creeps across the bench.
Root cause: Worn eccentric bearing or missing/hardened feet.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Drive motor
Class Major service partRel. cost $$R&R Moderate
Eccentric / drive linkage
Class Major service partRel. cost $R&R Moderate
15-minute timer
Class Major service partRel. cost $R&R Fairly easy
On/off switch
Class Major service partRel. cost $R&R Fairly easy
Rubber platform mat / feet
Class Periodic replacementRel. cost $R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Drive motor | Major service part | $$ | Moderate |
| Eccentric / drive linkage | Major service part | $ | Moderate |
| 15-minute timer | Major service part | $ | Fairly easy |
| On/off switch | Major service part | $ | Fairly easy |
| Rubber platform mat / feet | Periodic replacement | $ | Easy |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Daily QC controls run and reviewed
- ·Calibration verification per assay
- ·Routine cleaning and decontamination
- ·Scheduled reagent-path and pump-tubing maintenance
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Will not shake
- Confirm mains power and try continuous mode to bypass the timer.
- Check the on/off switch continuity.
- Listen for the motor; check its wiring.
- Replace the switch, timer or motor as isolated.
- Confirm steady oscillation in both modes.
Symptom: Weak or noisy agitation
- Inspect the eccentric and linkage for wear.
- Tighten all platform fasteners.
- Replace the eccentric/linkage if worn.
- Replace hardened feet or the platform mat.
- Confirm even amplitude across the platform.
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Central / core laboratory
- Point-of-care testing stations
- Blood bank
- Microbiology lab
Documents & Manuals
Related calculators
From BioLab, for work done with this kind of equipment.
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