Welch Allyn Green Series 900
Welch Allyn · Model Green Series 900
Six white LEDs for maximum, uniform illumination of the procedure area LED life of 50,000 hours to maximize investment Touchless intensity and power controls help reduce the risk of cross-contamination Maximize floor space with multiple mounting options, including ceiling mount Disposable sheath available to help reduce the risk of cross-contamination Standardize with a rugged, ergonomic, long-lasting and high-performance light
Key tips
- ·Never defeat or bypass a return-electrode monitoring (REM) alarm to finish a case - it's a direct burn risk.
- ·Verify OR table battery backup - a table that loses power mid-procedure is a real, documented incident type.
- ·Track surgical light lamp-hours rather than waiting for failure - a sudden failure mid-case is avoidable.
Typical Failure Modes
Failure patterns typical of this equipment class - general BMET reference, not verified against this exact unit's own service history unless flagged. Severity is a category-level estimate.
Instrument / implant breakage
HighSymptoms: Fractured tip, loose component, debris.
Root cause: Metal fatigue, improper reprocessing, or misuse.
Reprocessing / sterilization failure
MediumSymptoms: Residue, bioburden, discoloration.
Root cause: Inadequate cleaning cycle or damaged tray.
Table hydraulic / actuator fault
MediumSymptoms: Slow or drifting positioning.
Root cause: Cylinder seal or actuator wear.
OR light LED failure
LowSymptoms: Dim or dead panel, color shift.
Root cause: LED module aging.
Serviceable Parts & Consumables
The parts a BMET typically services on this class of equipment. Service class and relative cost are general engineering estimates for the category, not figures from this unit's documentation. Part numbers appear only when pulled from this unit's own service manual. Always confirm intervals and pricing against the manufacturer.
Return electrode (patient plate)
Single-use; expiry critical.
Class ConsumableRel. cost $R&R Easy
Foot switch assembly
Class Periodic replacementRel. cost $$R&R Fairly easy
OR light LED module
Class Major service partRel. cost $$$R&R Difficult
Table hydraulic actuator
Class Periodic replacementRel. cost $$$R&R Difficult
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Return electrode (patient plate) Single-use; expiry critical. | Consumable | $ | Easy |
| Foot switch assembly | Periodic replacement | $$ | Fairly easy |
| OR light LED module | Major service part | $$$ | Difficult |
| Table hydraulic actuator | Periodic replacement | $$$ | Difficult |
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.
- ·Pre-case functional check
- ·Electrosurgical return-electrode cable inspection
- ·Table hydraulic / mechanical inspection
- ·Annual electrical safety test and full PM
Troubleshooting Approach
A structured starting point derived from the failure modes above. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Electrosurgical electrode wear
- Confirm the presentation - typically poor cut/coag, sparking, low power - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: burned/eroded blade or pencil.
- Isolate the affected subsystem using the manufacturer's functional check or self-test, where one is provided.
- If the fault is confirmed and not a field adjustment, service or replace the electrosurgical pencil & electrode per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Symptom: Return electrode / pad fault
- Confirm the presentation - typically pad alarm, no activation - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: poor contact or expired pad.
- Isolate the affected subsystem using the manufacturer's functional check or self-test, where one is provided.
- If the fault is confirmed and not a field adjustment, service or replace the return electrode (patient plate) per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Operating rooms
- Procedure rooms
- Interventional suites
Documents & Manuals
No documents available for this device yet.
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