On this page
Asset Type
Manufacturer
Model
Models Covered
Dräger Perseus A500 only. Confirm the exact model, serial number, software, trolley or ceiling-mounted version, electronic or mechanical gas mixer, patient-gas measurement module, vaporizers, Vapor View, CLIC adapter, cylinder pressure reducers, isolation transformer, auxiliary outlets, external fresh-gas outlet, and other options before service. This page does not automatically cover Atlan, Primus, Fabius, Zeus, or another anesthesia workstation.
Manual Reference
Dräger Perseus A500 Instructions for Use, SW 2.0n, document 9510595, and the official SW 1.1n Instructions for Use, document 9054101, which contains the reviewed inspection, safety-check, and preventive-maintenance interval tables. Use the current model-, serial-, software-, mixer-, vaporizer-, option-, and region-specific Dräger technical documentation. Current controlled service information governs test points, tolerances, restricted adjustments, parts, and release criteria.
Manufacturer Recommendation / AEM Status
- Every 24 hours: Dräger recommends performing the full system test so functional readiness can be assured.
- At least monthly: Restart the Perseus so safety systems checked during startup are exercised.
- Every 12 months: Inspection and safety checks by service personnel. The optional external-cylinder pressure-reducer relief valve is also checked annually under the applicable procedure.
- Every two years: Replace the sample-gas return filter, water-trap-mount O-rings, and both lead-gel batteries, or replace batteries based on an authorized remaining-capacity determination.
- Every three years: Replace the seal, sieve insert, and sintered filter at the optional external-cylinder pressure-reducer connection, plus the air-filter mats for the patient-gas measurement module and power-supply unit.
- Every four years: Replace the optional CLIC adapter.
- Every six years: Replace the diaphragm unit, valve cone, discharge valve, and safety-valve spring of the optional external-cylinder pressure reducer and complete the applicable output-pressure check.
- Condition based: Replace the CO₂ absorber/soda lime and dust filter, water trap, flow sensors, AGS, and AGS filter when their listed condition or configured Infinity ID interval requires it.
The reviewed interval table is from official SW 1.1n documentation; the current SW 2.0n IFU and current service documentation must be checked for the exact serial number and configuration before parts are ordered or work begins. Safety checks do not replace scheduled wear-part replacement. A facility change to an OEM interval or task should be managed through its approved AEM program, documented risk assessment, service history, and applicable regulatory requirements.
What This PM Procedure Covers
- Identity, software, workstation version, gas mixer, options, service history, labels, field actions, and scheduled-component status
- Workstation structure, trolley or ceiling interface, brakes, controls, power, batteries, gas supplies, vaporizers, breathing system, sampling, scavenging, and accessories
- System test, leakage/compliance, fresh-gas delivery, ventilation, gas measurement, oxygen safety, alarms, backup operation, and emergency delivery
- Annual safety checks and two-, three-, four-, and six-year configuration-specific replacements
- Electrical safety, final assembly, repeat system test, settings restoration, and CMMS documentation
Required Tools and Equipment
- Current Perseus A500 IFU, controlled service procedure, vaporizer and option manuals, service bulletins, field-action information, and configuration-specific checklist
- Calibrated anesthesia/ventilator analyzer, test lung, approved breathing circuit, breathing bag, filters, and configuration-specific adapters
- Certified test gases and calibrated O₂, N₂O, CO₂, anesthetic-agent, flow, pressure, vacuum, and sampling-rate measurement equipment required by the controlled procedure
- Approved central gas and cylinder supplies, pressure-reducer test equipment, leak-test fittings, scavenging connection, and emergency-O₂ test setup
- Correct vaporizers and their controlled inspection or concentration-test procedures
- Electrical-safety analyzer suitable for the exact mains, isolation-transformer, auxiliary-outlet, equipment-class, and applied-part configuration
- Correct authentic Dräger annual, two-, three-, four-, six-year, and condition-based replacement parts
- Approved cleaning/reprocessing supplies, PPE, inspection light, absorbent materials, and correct hand tools
Safety: Never perform PM with a patient connected. Provide a ready alternate anesthesia workstation, label the Perseus unavailable, and reprocess it before service. Isolate electrical and gas supplies and relieve pressure before internal work. Keep oil, grease, ignition sources, silicone spray, and unapproved materials away from oxygen and sampling components. Housing removal, ceiling-system work, calibration, internal service, and complex repairs belong to appropriately trained personnel.
Step-by-Step PM Procedure
1. Remove the Workstation From Clinical Use
Action: Confirm no patient or procedure depends on the Perseus, provide verified alternate equipment, remove patient-use items, label the workstation unavailable, and complete the current reprocessing procedure.
Expected outcome: The workstation is clean, isolated, and safe for qualified maintenance.
2. Verify Identity, Software, and Configuration
Action: Record asset tag, Perseus A500 model, serial number, software, mains rating, trolley or ceiling-mounted version, gas mixer and configured gases, cylinder/central-supply arrangement, patient-gas module, breathing system, vaporizers, Vapor View, CLIC, AGS, external fresh-gas outlet, isolation transformer, auxiliary outlets, network interfaces, and other options.
Expected outcome: The asset matches the CMMS record and the correct manual, interval table, parts, options, and test path are positively identified.
3. Review History, Logs, Field Actions, and Due Work
Action: Review prior system tests, PM, leaks, repairs, drops, liquid entry, gas/agent/ventilation complaints, alarms, power events, software updates, Remote Service information, battery history, pressure-reducer history, component dates, service bulletins, and field actions.
Expected outcome: All open work and every applicable daily, monthly, annual, two-, three-, four-, six-year, and condition-based action are known.
4. Inspect Documentation, Labels, Structure, and Mobility
Action: Confirm current instructions are available. Inspect serial, rating, gas, fuse, outlet, vaporizer, warning, load-limit, and option labels. Inspect housing, trolley, central and individual brakes, castors, drawers, shelves, handles, rails, support-arm end stops, ceiling interface or flexibility trolley, mounting security, and accessory loads.
Expected outcome: Documentation and identification are complete; the workstation is stable, securely mounted, within load limits, and free of structural damage.
5. Inspect Controls, Power, Cooling, and Connections
Action: Inspect the display, touchscreen, rotary knob, keys, alarm light, speakers, workplace lighting, main switch, status display, cords, plugs, strain reliefs, protective-ground and equipotential connections, auxiliary outlets, isolation transformer, circuit breakers/fuses, data ports, cooling openings, filter mats, and cable routing.
Expected outcome: Controls and indicators are functional; power, grounding, outlets, cooling, and connections are secure and free of heat, arcing, contamination, or damage.
6. Inspect Gas Supplies, Cylinders, and Emergency Oxygen
Action: Inspect central-supply hoses/inlets, gas identification, cylinder yokes, seals, restraints, valves, pressure reducers, pressure indications, check valves, strain reliefs, O₂ flush, and emergency O₂ delivery. Check for leaks, corrosion, contamination, stiffness, damage, or incorrect connections.
Expected outcome: Each gas source is correctly identified, secure, leak-free, recognized, and capable of supplying the workstation; emergency oxygen functions correctly.
7. Inspect Vaporizers and Vapor View
Action: Inspect each vaporizer, agent label, level, fill/drain system, mounts, seals, locking and interlock mechanism, power cord where applicable, and Vapor View detection/illumination when installed. Perform leakage and concentration testing under the vaporizer-specific controlled procedure.
Expected outcome: Vaporizers are correctly identified, secure, leak-free, interlocked, detected when applicable, and meet their governing specifications.
8. Inspect the Breathing System, Absorber, Sampling, and AGS
Action: Inspect the breathing-system housing, blower module, inspiratory/expiratory valves, flow sensors, APL valve, absorber/CLIC, soda-lime dust filter, bag arm, bag, hoses, Y-piece, filters, sample line, water trap and mount, patient-gas module, sample-gas return, AGS, transfer hose, receiver, flow indicator, and filters. Replace condition-based items only under their current instructions.
Expected outcome: Breathing, sampling, and scavenging pathways are clean, dry, unobstructed, correctly assembled, leak-free, and current on consumables.
9. Complete Scheduled Component Replacement
Action: Replace every due two-, three-, four-, or six-year part listed above using the exact current service procedure. For batteries, confirm the controlled capacity determination if it is used instead of time replacement. Record part numbers, lots, dates, personnel, pressure-reducer configuration, and all post-replacement tests.
Expected outcome: Every configuration-applicable scheduled component is current, correctly installed, traceable, and verified.
10. Start the Perseus and Complete the Full System Test
Action: Assemble the approved breathing system, circuit, test lung, absorber, sensors, water trap, vaporizers, gas supplies, and scavenging. Power on the unit and run the complete system test without bypassing required steps. Record readiness status, leakage, compliance, calibrations, component checks, limitations, and every advisory.
Expected outcome: The system test completes with green/full operational readiness and no unresolved limitation, leak, or calibration failure.
11. Verify Leakage, Compliance, and Breathing-System Performance
Action: Complete the automatic and controlled leakage/compliance checks for the breathing system, hoses, bag, absorber, valves, vaporizers, sample line, and installed accessories. Use the leakage assistant as needed. Test coaxial circuits with the correct adapter when applicable and repeat testing after any opened or replaced component.
Expected outcome: All leakage, compliance, circuit, valve, and pressure-release checks meet the exact current criteria.
12. Verify Gas Delivery, Ventilation, and Oxygen Safety
Action: With calibrated analyzers, test representative fresh-gas settings, gas composition, minimum O₂ delivery, O₂ flush, emergency O₂, source-change/failure response, and representative installed ventilation modes. Verify tidal volume, rate, timing, airway pressure, PEEP, flow, manual/spontaneous ventilation, APL function, and emergency/manual delivery under the controlled procedure.
Expected outcome: Delivered and displayed gases and ventilation meet exact tolerances, oxygen-safety functions respond correctly, and alternate/manual ventilation remains available.
13. Verify Gas Measurement and Sampling
Action: Apply certified test gas and verify O₂, CO₂, N₂O, and installed anesthetic-agent measurement; agent identification; sampling rate; patient-gas-module leakage; waveforms; numerics; and related alarms. Use the values and limits from the current configuration-specific service procedure rather than copying a different software revision.
Expected outcome: Gas measurement, identification, sampling, leakage, and alarms meet the controlled criteria.
14. Verify Alarms and Safety Features
Action: Test the primary and backup alarm speakers and applicable high/low pressure, apnea, volume, O₂, gas/agent, circuit, flow, gas-supply, scavenging, sensor, mains-power, battery, and system alarms. Verify audible/visual priority, displayed message, silence/reset behavior, vaporizer interlock, oxygen-failure response, and safe fallback behavior.
Expected outcome: Every required alarm and safety feature detects, displays, sounds, prioritizes, transmits when applicable, and clears correctly.
15. Verify Battery Backup and Power Transfer
Action: Fully charge the two batteries. With the configured workstation operating on a test lung, remove mains power under the controlled setup and verify uninterrupted transfer, correct indications/alarms, battery function, and operation of the main workstation. Confirm auxiliary outlets are not incorrectly assumed to be battery backed. Restore mains and verify charging.
Expected outcome: The Perseus transfers to battery without unsafe interruption, provides the required controlled test performance, alarms correctly, and resumes charging.
16. Complete Annual Safety and Pressure-Reducer Checks
Action: Complete the exact annual Dräger safety checklist, including accompanying documents, specified functions, condition, accessories, electrical safety, gas measurement, sampling, leakage, minimum O₂ delivery, and configuration-specific external-cylinder pressure-reducer checks. Use the current procedure and calibrated equipment for every numeric criterion.
Expected outcome: All annual inspection and safety-check items pass, including every applicable pressure-reducer test.
17. Perform Configuration-Specific Electrical Safety
Action: Test the complete configured workstation, isolation transformer, auxiliary outlets, and connected electrical accessories under the current Dräger procedure and facility-adopted standard. Record analyzer identification, equipment class, applied parts, outlet configuration, method, test points, limits, and measured results.
Expected outcome: Every required ground, leakage, outlet, and accessory measurement passes its documented criterion.
18. Restore, Retest, and Document
Action: Remove test equipment, reinstall every cover and approved accessory, restore authorized profiles/settings and alarm limits, reprocess/reassemble as required, reconnect gases and mains, and run a final complete system test. Confirm no silicone or fluid contamination, gas leak, temporary setting, open valve, or test adapter remains. Document parts, measurements, corrective work, and disposition.
Expected outcome: Final operational readiness is green, the configured workstation passes, documentation is complete, and the unit is formally returned to service or clearly quarantined.
Electrical Safety Testing
Perseus configurations may include a protective-ground connection, isolation transformer, auxiliary outlets, and connected accessories that change the required test method. The public IFU does not provide one universal numeric limit for every regional standard and configuration. Use the current controlled Dräger procedure and the electrical-safety standard adopted by the facility. Include all authorized connected devices when the procedure requires a system measurement.
Analyzer / serial / calibration due:
Result =
Mains / equipment class / applied parts / isolation transformer / auxiliary outlets / accessories:
Result =
Standard / method / governing limits:
Result =
Protective-earth resistance:
Test points =
Limit =
Highest result =
Pass / Fail =
Equipment or touch leakage:
Limit =
Highest result =
Pass / Fail =
Applied-part / outlet / connected-accessory measurements:
Limits / results / N/A =
Pass / Fail Criteria
Pass
- Exact model, serial, software, workstation version, mixer, gases, vaporizers, options, intervals, field actions, and service procedure are documented
- Documentation, labels, structure, mobility, mounting, controls, power, cooling, gas supplies, cylinders, vaporizers, breathing system, sampling, scavenging, and accessories pass
- All annual, two-, three-, four-, six-year, and condition-based activities applicable to the configuration are current
- Full system test shows green/full readiness; leakage, compliance, gas delivery, ventilation, oxygen safety, gas measurement, sampling, alarms, and battery transfer pass
- Annual safety checks, configuration-specific pressure-reducer testing, electrical safety, settings restoration, and final system test pass
- No unresolved physical, gas, agent, ventilation, measurement, alarm, power, software, field-action, contamination, or safety fault remains
Remove From Service
- System test is yellow, red, incomplete, or has an unresolved limitation, calibration failure, or unacceptable leak
- Gas/agent delivery, oxygen safety, ventilation, measurement, sampling, alarm, battery, pressure-reducer, scavenging, or electrical-safety testing fails
- Physical, electrical, mounting, gas, vaporizer, breathing-system, sampling, scavenging, outlet, or accessory damage could affect safe anesthesia delivery
- A required inspection, scheduled component, qualified technician, calibrated instrument, authentic part, controlled service procedure, or alternate anesthesia workstation is unavailable
- Any temporary test setting remains or an unresolved condition could affect gas composition, agent delivery, ventilation, monitoring, alarm annunciation, or power continuity
Copy/Paste CMMS Work Order Procedure
Do not return the Perseus to service with incomplete scheduled maintenance, non-green operational readiness, an unacceptable leak, inaccurate gas/agent or ventilation delivery, unreliable alarm, failed battery or electrical-safety result, unresolved contamination, or any temporary test configuration left in place.