NuAire NU-5720
NuAire · Model NU-5720
PRECISE HUMIDITY CONTROL Relative humidity levels up to 90% are achieved in the growth chamber through the use of a 3-liter reservoir external to the chamber. The chamber air is routed through the water vapor saturated the air in an evaporate box to add humidity when the RH sensor indicates more humidity is needed to meet set point. DUAL DECONTAMINATION CYCLES The direct heat technology enables the use of a 145°C dry and 95°C humidified decontamination cycle that can be conveniently run overnight in just 8 hours without removing the CO2 or temperature sensors. The NuTouch control system steps the user through the process with on screen instructions and displays progress throughout each phase of the complete cycle.
Key tips
- ·Run QC controls before trusting any repair - an analyzer that passes self-test can still report clinically wrong results.
- ·Rule out a reagent lot change before opening the instrument - it can look exactly like a hardware fault.
- ·Centrifuge rotors have a hard retirement age/cycle limit regardless of visible condition - don't eyeball it.
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.
Temperature control fault
MediumSymptoms: Chamber out of set-point range, alarm.
Root cause: Heater element or sensor drift.
CO2 / gas control fault
MediumSymptoms: Gas concentration alarm, contamination risk.
Root cause: Gas sensor or solenoid valve wear.
Door seal / humidity leak
LowSymptoms: Humidity drift, condensation.
Root cause: Aged door gasket.
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.
CO2 sensor
Class Periodic replacementRel. cost $$$R&R Moderate
Door gasket / seal
Class Periodic replacementRel. cost $R&R Fairly easy
Temperature sensor
Class Periodic replacementRel. cost $$R&R Moderate
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| CO2 sensor | Periodic replacement | $$$ | Moderate |
| Door gasket / seal | Periodic replacement | $ | Fairly easy |
| Temperature sensor | Periodic replacement | $$ | Moderate |
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.
- ·Daily QC controls run and reviewed
- ·Calibration verification per assay
- ·Routine cleaning and decontamination
- ·Scheduled reagent-path and pump-tubing maintenance
Troubleshooting Approach
A structured starting point derived from the failure modes above. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Temperature control fault
- Confirm the presentation - typically chamber out of set-point range, alarm - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: heater element or sensor drift.
- 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 temperature sensor 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: CO2 / gas control fault
- Confirm the presentation - typically gas concentration alarm, contamination risk - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: gas sensor or solenoid valve wear.
- 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 cO2 sensor 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.
- Central / core laboratory
- Point-of-care testing stations
- Blood bank
- Microbiology lab
Documents & Manuals
No documents available for this device yet.
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