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Manual Reference
Hamilton Medical HAMILTON-T1 Operator's Manual, software 3.0.x, document 10101879.01. Confirm the installed software, adult/pediatric or neonatal configuration, high- or low-pressure oxygen setup, battery count, galvanic or paramagnetic O2 sensor, CO2/SpO2 options, communication interfaces, trolley or transport mounting, humidifier, and accessories before service.
Manufacturer Recommendation / AEM Status
- Between patients: Replace the breathing-circuit components with sterilized reusable or new single-patient-use parts as applicable and run the complete preoperational checks.
- Monthly, or more often if required: Inspect the rear-panel fan filters and the white air-intake filters outside the HEPA filter for dust and lint; replace as needed.
- Every six months: Recharge the batteries from a primary power source for at least four hours.
- Yearly or as necessary: Have the batteries serviced; their expected service life is three years.
- Yearly or as necessary: Replace a depleted galvanic O2 sensor and replace the air-intake HEPA filter.
- Yearly: Have authorized service personnel perform the service-related preventive maintenance and, when CO2 is installed, the CO2 accuracy check.
Hamilton assigns annual service-related PM, battery service, and CO2 accuracy verification to authorized service personnel using the controlled service manual. This page separates operator-accessible inspection and testing from restricted service work. Any facility change to the manufacturer schedule belongs under its approved AEM program, documented risk assessment, service history, and applicable regulatory requirements.
What This PM Procedure Covers
- Identity, software, configuration, operating hours, history, labels, and due maintenance
- Physical inspection of the ventilator, mount, power supplies, batteries, gas connections, filters, circuit connections, display, controls, and accessories
- Monthly filter inspection, six-month charging, annual HEPA replacement, battery and O2-sensor status, and authorized annual service
- Startup self-test, circuit tightness, flow-sensor calibration, O2/CO2 calibration when applicable, power transfer, and alarm checks
- Configuration-specific electrical safety and final return-to-service documentation
Required Tools and Equipment
- Current software-specific HAMILTON-T1 Operator's Manual, option instructions, and authorized service documentation when service-level work is performed
- Approved adult/pediatric or neonatal breathing circuit, correct Hamilton flow sensor or pressure lines, calibration adapter, and compatible test lung
- Medical oxygen supply and appropriate high- or low-pressure oxygen accessories for the installed configuration
- Replacement fan filters, white air-intake filters, and HEPA filter appropriate to the serial-number/configuration record
- Compatible Hamilton battery, galvanic O2 sensor, expiratory-valve set, and other due parts as applicable
- Calibrated ventilator analyzer and CO2 reference equipment when required by the controlled service procedure
- Electrical-safety analyzer suitable for the device class and installed applied-part options
- Approved cleaning and disinfection supplies, PPE, and standard hand tools
Safety: Never perform maintenance with a patient connected. Provide another means of ventilation, place the unit in standby, power it down when required, and reprocess applicable components. Refer internal, annual service, battery service, and CO2 accuracy work to properly trained and authorized personnel.
Step-by-Step PM Procedure
1. Remove the Ventilator From Clinical Use
Action: Confirm no patient is connected, provide alternate ventilation, place the T1 in standby, shut it down safely when required, label it unavailable, and clean or disinfect the ventilator and reusable patient-path components.
Expected outcome: Maintenance can proceed without interrupting therapy or exposing personnel to contamination.
2. Verify Identity, Configuration, and Service History
Action: Record asset tag, serial number, software revision, operating hours from System > Info, patient-group capability, oxygen configuration, battery count and age, O2 sensor type, CO2/SpO2 options, interfaces, mount, and accessories. Review faults, repairs, field actions, battery history, filter changes, and last authorized annual service.
Expected outcome: The unit matches its CMMS record and all applicable tasks, options, parts, and service boundaries are identified.
3. Perform the Physical Inspection
Action: Inspect the enclosure, handle, display, touchscreen, rotary control, alarm lamp, speaker openings, ports, circuit and pressure-line connections, expiratory-valve area, oxygen inlets, cooling openings, USB/communication connectors, AC/DC power supplies, cords, plugs, strain reliefs, batteries, transport mount or trolley, rails, brackets, hardware, and accessories. Confirm labels are legible and check for cracks, contamination, corrosion, fluid entry, loose parts, damaged pins, exposed conductors, or blocked airflow.
Expected outcome: The complete transport system is clean, secure, legible, undamaged, and free of visible electrical, pneumatic, mechanical, or mounting hazards.
4. Inspect the Fan and Air-Intake Filters
Action: Remove and inspect the rear-panel fan filters and the white air-intake filters on the outside of the HEPA filter. Check for dust, lint, deformation, moisture, or damage. Replace filters as needed; do not reinstall wet or damaged media.
Expected outcome: Clean, dry, undamaged filters are correctly seated with unrestricted airflow, and the monthly inspection is documented.
5. Replace the Annual HEPA Filter
Action: Verify the correct HEPA filter for the installed configuration, remove the old filter according to the operator manual, inspect its housing and seals, install the new filter in the proper orientation, and secure its cover.
Expected outcome: A correct new HEPA filter is fully seated, sealed, and documented at the yearly interval.
6. Review Battery Condition and Complete Due Service
Action: Inspect each battery and its compartment for damage, swelling, contamination, corrosion, or poor retention. Confirm the six-month four-hour recharge has been completed. Record battery age and service history; route batteries for annual authorized service and replace them when the controlled procedure indicates or at the applicable life limit. After service, verify charging indications and operation on each installed battery.
Expected outcome: Batteries are intact, charged, within their approved service status, retained securely, and capable of supporting normal power transfer without a battery alarm.
7. Evaluate the Oxygen Sensor and Gas Path
Action: Identify the installed O2 sensor type. Inspect oxygen inlets, hoses, fittings, low-pressure reservoir or high-pressure connection, and related accessories. Replace a depleted galvanic O2 sensor when indicated; do not schedule replacement of a paramagnetic sensor as though it were galvanic. Connect the correct oxygen source and check for secure, leak-free connections.
Expected outcome: Gas-path components are correct and intact, and the installed O2 sensor is recognized and ready for calibration or functional testing.
8. Complete Authorized Annual Service Tasks
Action: Have Hamilton-authorized service personnel perform the yearly service-related preventive maintenance using the software- and serial-specific service manual. Include battery service and the CO2 accuracy check when those items apply. Record the service report, parts replaced, measurements, adjustments, software actions, and post-service verification.
Expected outcome: All restricted annual tasks are completed by qualified personnel with no unresolved service message, fault, or overdue component.
9. Run the Startup Self-Test
Action: Connect primary power and the correct oxygen supply, assemble the specified test breathing circuit, and turn on the ventilator. Observe the alarm lamp sequence and audible signal during startup, then confirm the unit reaches standby without an unresolved technical alarm.
Expected outcome: The startup self-test, alarm indicators, display, controls, and standby transition complete normally.
10. Perform the Circuit Tightness Test
Action: From Standby, open the preoperational check and run the Tightness test with the complete intended breathing circuit. Follow the on-screen prompts to occlude and release the patient end. Repeat after any circuit or pneumatic component is changed.
Expected outcome: The ventilator reports that the tightness test passes and stores a current completion date and time.
11. Calibrate the Flow Sensor and Applicable Sensors
Action: Calibrate the correct adult/pediatric flow sensor, neonatal flow sensor, or neonatal circuit for the selected patient group and mode. Reverse the flow sensor and use the calibration adapter when prompted. Perform O2 sensor calibration when required and CO2 sensor/adapter zero calibration when installed and indicated.
Expected outcome: Each applicable calibration displays a successful result or checkmark; no patient-group, sensor, or circuit mismatch remains.
12. Verify Power Transfer, Charging, and Alarms
Action: With the ventilator operating on primary power, disconnect that source and verify the loss-of-external-power alarm and uninterrupted battery operation. Reconnect primary power and verify alarm reset and charging. Generate representative test alarms using the operator-manual method and confirm the visual indicator, audible signal, message, priority behavior, silence/reset, and recovery.
Expected outcome: Power transfers without shutdown, batteries charge normally, and each required alarm is detected, announced, displayed, and cleared correctly.
13. Verify Ventilation and Installed Options
Action: Connect a compatible test lung and use the software/configuration-specific controlled procedure to check representative modes, rate, pressure, PEEP, delivered volume, oxygen monitoring, trigger response, and sensor readings. Verify CO2, SpO2, nebulizer, humidifier, communication, nurse-call, and transport-power functions when installed and included in the controlled procedure.
Expected outcome: Delivered and measured parameters and all installed options meet the applicable Hamilton acceptance criteria with no unresolved alarm or calibration error.
14. Perform Electrical Safety Testing
Action: Apply the current Hamilton service procedure and facility policy for the exact T1 mains-power supply, device class, and installed CO2/SpO2 or other applied-part configuration. Test all applicable power supplies and powered accessories, record the analyzer method and limits, and compare results with the controlled criteria.
Expected outcome: Every required measurement passes the documented criterion for the exact configuration.
15. Restore the System and Make the Return-to-Service Decision
Action: Remove test equipment, reinstall filters, covers, batteries, and approved accessories, clean surfaces, and configure the intended circuit. Repeat the preoperational check after work affecting the circuit or pneumatic path. Confirm date/time, configuration, charge state, mounting security, and absence of technical alarms. Document all parts, measurements, service reports, failures, and corrective work.
Expected outcome: The Hamilton T1 is complete, clean, current on maintenance, and either formally returned to service or clearly quarantined.
Electrical Safety Testing
The public operator manual assigns service-related annual PM to authorized service personnel and does not provide one universal electrical-safety limit for every T1 power-supply and option configuration. Use the current controlled Hamilton service procedure, the analyzer method required by the facility, and the exact device class and applied-part configuration. Do not copy limits from a C1, MR1, or a differently configured T1.
Electrical-safety analyzer / serial / calibration due:
Result =
Installed power supply and equipment class:
Result =
Applied parts / CO2 / SpO2 / accessories:
Result =
Test standard, method, and governing limits:
Result =
Protective-earth, equipment/touch, and patient leakage results as applicable:
Results / N/A =
Pass / Fail =
Pass / Fail Criteria
Pass
- Physical condition, labels, mount, power equipment, gas connections, filters, batteries, accessories, and configuration are complete and acceptable
- Monthly filter, six-month recharge, annual HEPA replacement, battery/O2-sensor status, and authorized annual service are current
- Startup self-test, circuit tightness, flow-sensor and applicable O2/CO2 calibrations pass
- Primary-to-battery power transfer, charging, alarm functions, ventilation performance, and installed options pass
- Configuration-specific electrical safety and final configured preoperational check pass with no unresolved fault
Remove From Service
- The ventilator fails startup, tightness, calibration, alarm, power-transfer, ventilation, option, or electrical-safety testing
- A battery is damaged, overdue for required service, will not charge, or cannot support uninterrupted transfer
- A filter, HEPA filter, galvanic O2 sensor, or authorized annual service item is due and cannot be completed
- Damage, contamination, fluid entry, obstructed airflow, a damaged gas/power connection, or insecure transport mounting could affect safe use
- The correct software/configuration-specific manual, test equipment, gas supply, or authorized technician is unavailable for a required task
Copy/Paste CMMS Work Order Procedure
Do not return the Hamilton T1 to service with a failed preoperational check, circuit leak, unsuccessful calibration, failed alarm or power transfer, unacceptable battery, overdue annual authorized service, failed electrical-safety result, or any unresolved condition that could interrupt or impair ventilation.