Welch Allyn, Inc.
WELCH ALLYN, INC. · Model 901137
Surveyor Central Station with S4 Wifi telemetry and S12/S19 multiparameter bedside monitoring capabilities; English language and CD manual; Configured CPU (custom SCNODE configuration must be determined) with 220V power and dual color LCD 24" monitors with high resolution; 8 hard wired patient monitoring slots and 0 telemetry channels (single display required); Redundant server (RAID1+0) storage for up to 1,200 days, no network printer included; VERITAS analysis algorithm with 12- lead ECG inter
Intended use: A mains electricity (AC-powered) device designed to receive continuous, interval and/or spot-check physiological data (e.g., vital signs) from one or more bedside patient monitor(s) (not included) to display this information at a central patient monitoring station where staff can monitor multiple patients simultaneously. It is comprised of hardware with integrated software and is especially used in critical care settings, producing visible and/or audible signals/alarms when adverse conditions are registered. Additional features may include Holter/ST-segment monitoring and patient data transfer [e.g., into an electronic medical record (EMR)].
Key tips
- ·A no-signal/flatline alarm gets checked on the patient first, not the monitor - rule out a real clinical event before troubleshooting.
- ·Recalibrate NIBP against a reference manometer, not just a self-test pass.
- ·Reused patient cables (SpO2, ECG leads) are a common source of intermittent-fault complaints - swap the cable before the module.
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.
ECG lead-off / artifact
MediumSymptoms: Flat or noisy ECG, frequent lead-off alarms.
Root cause: Worn electrodes, loose leads, or dry gel.
SpO2 probe / sensor failure
MediumSymptoms: No pleth, SpO2 drops to --- or false low.
Root cause: LED/photodiode aging or cable damage.
Internal battery depletion
HighSymptoms: Short backup time, battery alarm on transport.
Root cause: Aged backup battery.
Display / touch panel fault
LowSymptoms: Dim, flickering, or unresponsive screen.
Root cause: Backlight or digitizer failure.
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.
SpO2 sensor (adult/ped/neo)
Class Frequent wear itemRel. cost $$R&R Easy
NIBP cuff & hose
Consumable per patient.
Class Periodic replacementRel. cost $R&R Easy
Rechargeable backup battery
Class Periodic replacementRel. cost $$R&R Fairly easy
Display / touch assembly
Class Periodic replacementRel. cost $$$R&R Difficult
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| SpO2 sensor (adult/ped/neo) | Frequent wear item | $$ | Easy |
| NIBP cuff & hose Consumable per patient. | Periodic replacement | $ | Easy |
| Rechargeable backup battery | Periodic replacement | $$ | Fairly easy |
| Display / touch assembly | Periodic replacement | $$$ | 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.
- ·Routine cable and lead-wire inspection for fraying/wear
- ·Battery conditioning cycle
- ·NIBP calibration check against a reference manometer
- ·ECG / SpO2 accuracy verification against a patient simulator
- ·Annual electrical safety test
Troubleshooting Approach
A structured starting point derived from the failure modes above. Follow the manufacturer's service documentation for the actual procedure.
Symptom: ECG lead-off / artifact
- Confirm the presentation - typically flat or noisy ECG, frequent lead-off alarms - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: worn electrodes, loose leads, or dry gel.
- 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 eCG patient cable & lead set 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: SpO2 probe / sensor failure
- Confirm the presentation - typically no pleth, SpO2 drops to --- or false low - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: lED/photodiode aging or cable damage.
- 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 spO2 sensor (adult/ped/neo) 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.
Technical Specs
- MRI safety
- Labeling does not contain MRI Safety Information
- Sterile
- No
- Single use
- No
- Prescription use
- Rx only
- FDA distribution status
- In Commercial Distribution
- Device type (GMDN)
- Centralized patient monitor
- FDA product classification
- MONITOR, PHYSIOLOGICAL, PATIENT(WITH ARRHYTHMIA DETECTION OR ALARMS)
- Manufacturer support
- +1(315)685-2834 · GDSN_SUPPORT@MYHILLROM.ONMICROSOFT.COM
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- ICU / CCU
- Emergency Department
- OR / PACU
- General med-surg floors
- Step-down units
- Telemetry units
Documents & Manuals
No documents available for this device yet.
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