Instruction Manual

Forehead Sleep Recorder File No. DMR-SM902-4-25 Ver:A0

After the above problems are resolved, there are still problems that need to be handled, please

contact the after-sales service unit. For contact details, please refer to “Customer Service” in

Section 4 of this manual.

The user or anyone without written authorization are not permitted to conduct any form of

repair or other treatment on the product.

9. Maintenance and Care

1) After use, put the device in the charging dock of the charging box and store it in a dry and

ventilated environment. Avoid direct sunlight, storage and transportation environment should

meet the requirements prescribed in the clause 5.3 of this manual.

2) Clean the product after use. If it is used by different patient, disinfect it. Both cleaning and

disinfection can be performed by the patient. The cleaning and disinfecting components are

the main unit and the charging case.

3) When not in use for a long time, it should be fully charged before storage, and the device

should be charged every three months. Failure to comply with this may severely reduce the

battery life.

4) Before using the electrode stickers, check whether they are within the validity period. It

is forbidden to use the electrode stickers that have expired.The electrode stickers should

be used up within 2 weeks after the electrode stickers are unsealed . Electrode stickers

require no special maintenance.

10. Technical parameters

10.1. EEG performance requirements

EEG performance refers to "IEC 80601-2-26 Medical electrical equipment — Part 2-61: Particular

requirements for basic safety and essential performance of electroencephalographs"

1) EEG performance requirements

The error does not exceed ± 10%.

2) Time interval

The error does not exceed ± 5%.

3) Amplitude-frequency characteristics

1-60Hz (excluding 50Hz and 60Hz), the error does not exceed + 10% ~ -29%.

4) Noise level

Not more than 5 μV (peak-to-peak).

5) Common mode rejection ratio

Input frequency: 10Hz and 60Hz, not less than 80 dB.

6) Polarization withstand voltage

Apply a DC polarization voltage of ± 300 mV, and the error should not exceed ± 5%.

7) Input impedance

For a 10 Hz sine wave signal, the input impedance should not be less than 1MΩ.