Test equipment MRI patient monitoring systems · Expression family

Invivo Expression MR200: troubleshooting and error codes

The ServiceForge knowledge base holds 9 documented symptoms for the Invivo Expression MR200, with 11 ranked causes, 20 diagnostic checks with test points and expected values, and 0 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Cart communication loss with IP5 or modules

Multiple parameter problems with loss of waveforms and numeric values (---) appearing on display; X through icons indicates communication failure

Ranked causes

1. Cart to IP5 communication link failure (common)
2. Cart power or module power loss (occasional)

First check

Apply power and verify LED status

Test point: Power LED indicators on Cart, IP5 and modules
Expected: All Power LEDs illuminated SOLID (not blinking)

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Quadtrode electrode not adhering or ineffective patient safety

Electrode fails to maintain contact or provides poor signal transmission

Ranked causes

1. Electrode expiration date exceeded (common)
2. Hair present at application site (common)

First check

Verify electrode expiration

Test point: Quadtrode package
Expected: expiration date not exceeded

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: CO2 patient safety

Carbon dioxide measurement calibration per manufacturer requirements

Ranked causes

1. Annual calibration requirement (common)

First check

Visual inspection of CO2 system

Test point: MR200 unit
Expected: No visible damage or contamination

3 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: NIBP patient safety

Non-invasive blood pressure calibration per manufacturer requirements

Ranked causes

1. Annual calibration requirement (common)

First check

Visual inspection of NIBP system

Test point: MR200 unit
Expected: No visible damage or contamination

3 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Performance assurance and safety after repair patient safety

Testing required following any repair work on the MR200 unit

Ranked causes

1. Post-repair validation requirement (common)

First check

Visual inspection

Test point: MR200 unit
Expected: No visible damage or contamination

3 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

ECG cable heating or patient heating risk patient safety

Cable configuration may cause tissue heating due to cable loops near patient

Ranked causes

1. ECG cable formed into U or S shaped loops (occasional)

First check

Inspect ECG cable routing

Test point: ECG cable path from module to patient
Expected: no U or S shaped loops; cable straight or gently curved

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

ECG signal quality poor or noisy MRI environment

ECG waveform contains 50/60 Hz ambient noise or other artifacts; signal degradation in MRI environment

Ranked causes

1. Inadequate skin preparation (common)

First check

Verify skin preparation

Test point: electrode application site
Expected: skin cleaned, abraded, and pink; no excess gel

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Single parameter problem (SPO2 or ECG)

Single parameter waveform or numeric values missing or showing (---); other parameters normal

Ranked causes

1. SPO2 or ECG wireless module communication failure (common)

First check

Verify SPO2 or ECG module is powered and communicating

Test point: Module LED indicator and module icon on main display
Expected: Module LED solid; no X through module icon on display

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

WECG Module not communicating with Cart MRI environment

Wireless ECG module fails to establish or maintain network communication

Ranked causes

1. WECG Module not set to correct network channel (common)

First check

Verify WECG Module configuration

Test point: WECG Module network settings
Expected: correct network channel selected; communication status shows connected to Cart

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.