wECG and wSpO2 Modules
The wECG and wSpO2 modules are battery powered and communicate with the MR400 through
a bidirectional 2.4 GHz RF link, which is automatically established approximately 30 seconds after
power is applied to the module. These wireless modules operate at a distance of up to 9.1 m (30
feet) from the MR400 cart when all devices are placed within the same MRI room or within the
same shielded room.
The network channel and battery indicators denote the selected network channel and the
battery status for each wireless module. After communications have been established, all
module‐dependent vital sign information will be displayed within 10 seconds on the MR400.
The system use model specifies one wECG module and one wSpO2 module per MR400
system network channel. If more than one type of each module is communicating on the
same network channel, then waveform and measurement corruption will occur.
2‐8 System Overview Expression MR400 Instructions for Use
Power fault detected; contact technical
Batteries are charging
Batteries at full charge
Condition / Meaning