Sechrist 3300E
Sechrist · Model 3300E
Compresses the chamber at a variable rate that allows more comfortable ear pressure equalization Comfort Profile automatically adjusts the compression rate throughout the compression phase of a treatment cycle In the unlikely event that any of the electronic or pneumatic systems fail, the ECM will automatically create a Safe State environment The ECM monitors the system for safe operation and will alert the operator to any unusual operating characteristics or system errors.
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.
Will not pressurise / hold pressure
HighSymptoms: Chamber will not reach treatment pressure, or pressure bleeds off; long compression time.
Root cause: Compressor / air-supply fault, a door / hatch seal leak, a relief-valve fault, or a control-valve fault.
O2 delivery / concentration fault
MediumSymptoms: Delivered O2 low, O2-supply alarm, mask / hood not delivering.
Root cause: O2 supply / regulator, the delivery valve, or (concentrator-fed units) the concentrator.
Environmental-control fault (temperature / humidity)
MediumSymptoms: Chamber too hot / cold or humid, patient discomfort alarms.
Root cause: Chamber A/C or ventilation fault.
Communication / monitoring fault
MediumSymptoms: No intercom to the patient, monitoring parameters missing.
Root cause: Intercom or the pass-through monitoring connections.
Acrylic / viewport / seal wear
LowSymptoms: Crazing in the acrylic, worn door seal, fogging.
Root cause: Acrylic ageing (has a service life) or a worn seal.
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.
Door / hatch seal
Class Periodic replacementRel. cost $$R&R Fairly easy
Compressor / air-supply components
Class Major service partRel. cost $$$R&R Difficult
Relief / control valves
Class Periodic replacementRel. cost $$R&R Moderate
O2 regulator / delivery valve
Class Periodic replacementRel. cost $$R&R Moderate
Acrylic hull / viewport (service-life item)
Class Major service partRel. cost $$$$R&R Expert-level
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Door / hatch seal | Periodic replacement | $$ | Fairly easy |
| Compressor / air-supply components | Major service part | $$$ | Difficult |
| Relief / control valves | Periodic replacement | $$ | Moderate |
| O2 regulator / delivery valve | Periodic replacement | $$ | Moderate |
| Acrylic hull / viewport (service-life item) | Major service part | $$$$ | Expert-level |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
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 pressurise or hold pressure
- Confirm the air supply / compressor delivers to spec.
- Inspect the door / hatch seal and sealing surfaces.
- Check the relief and control valves for leak-by.
- Run a pressure-hold test.
- Replace the seal or refer the valve / compressor fault; do not treat until the chamber holds pressure safely.
Symptom: O2 delivery fault
- Confirm the O2 supply pressure and regulator.
- Check the mask / hood and delivery valve.
- Verify delivered O2 with an analyser.
- For concentrator-fed units, service the concentrator.
- Replace the regulator / delivery valve as isolated.
Technical Specs
- Height
- 57.5 in
- Length
- 102.9 in
- Weight
- 2030 lbs
- Width
- 46 in
Documents & Manuals
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