Masimo EMMA Capnograph
Masimo · Model EMMA Capnograph
Clear, continuous capnograph of carbon dioxide values Simple, easy-to-use interface for quick set-up and one-touch programming Audible and visual alarm system for No Adapter, Clogged Adapter, No Breath (Apnea), Low Battery and adjustable High and Low EtCO2 alarm.
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.
Unit will not power on or complete startup
HighSymptoms: No power on, startup sequence does not finish.
Root cause: No battery fitted or depleted batteries.
EtCO2 readings out of accuracy
HighSymptoms: Measured EtCO2 outside specified accuracy, drift versus reference gas.
Root cause: Incorrect zero reference - a zeroing procedure is required, then verify with reference gas.
Airway adapter alarms (No Adapter / Clogged Adapter / No Breath)
MediumSymptoms: Persistent "No Adapter" or "Clogged Adapter" alarm, apnea alarm with a breathing patient.
Root cause: Adapter not seated, a used/contaminated single-use adapter, or moisture/secretions in the adapter window.
Display dim or hard to read
LowSymptoms: Numbers appear dim.
Root cause: Automatic brightness control activated by bright light or sunlight - pressing any button restores normal brightness.
Bluetooth measurement not displaying on the host / smart device
LowSymptoms: No data on the paired device, connection drops.
Root cause: Bluetooth off, out of range, wrong pairing, incompatible or missing app, or damaged Bluetooth hardware.
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.
AAA batteries (x2)
Replace immediately when the battery indicator blinks; carry spares.
Class ConsumableRel. cost $R&R Easy
EMMA airway adapter
Single-patient disposable; do not reuse.
Class ConsumableRel. cost $R&R Easy
Display / housing assembly
Class Major service partRel. cost $$$R&R Difficult
Reference CO2 gas / verification kit
Verification tool, not a spare part.
Class Periodic replacementRel. cost $$R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| AAA batteries (x2) Replace immediately when the battery indicator blinks; carry spares. | Consumable | $ | Easy |
| EMMA airway adapter Single-patient disposable; do not reuse. | Consumable | $ | Easy |
| Display / housing assembly | Major service part | $$$ | Difficult |
| Reference CO2 gas / verification kit Verification tool, not a spare part. | Periodic replacement | $$ | Easy |
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: EtCO2 readings out of specified accuracy
- Perform the Zeroing procedure with a clean adapter and no CO2 present.
- Verify the reading against a known reference gas concentration.
- If still inaccurate after zeroing, fit a fresh airway adapter and repeat.
- Check for moisture or secretions in the adapter and the measurement window.
- If accuracy cannot be restored, refer the capnograph for service.
Symptom: Unit will not turn on / finish startup
- Fit two fresh AAA batteries with correct polarity.
- Confirm the battery cover snaps fully closed.
- Retry power-on.
- If it still fails with new batteries, inspect the battery contacts for corrosion.
- Refer the unit for service if it will not start with good batteries and clean contacts.