Shenzhen Hailife Technology Co. Ltd. FD01B ユーザーズマニュアル

2 

 

output signal of cardiac valves vibrating, and it is sent to the headphone for getting a 

rhythmical sound with the fetal heartbeat. Simultaneously, it is sent to a counter which 

calculate periods of heartbeat that is fetal heartbeat rate  (bpm=beat per minute). 

Normally none, as a particular case, please consult your doctor. 

No adverse effect 

The Doppler is internally powered equipment, and it is an IEC/EN 60601-1-1 Type  BF 

applied part. Type BF protection means that the connection between the equipment and the 

personal complies with permitted leakage currents and dielectric strength of IEC/EN 60601-

1-1. 

WARNING and CAUTION messages must be observed. To avoid the possibility of injury, 

observe the following precautions during the operation of the device. 

 

 

1.  Do not transfer or repair the device without permit. 

2.  The user should read this manual before using this device. 

3.  Do not use the device with High Frequency surgical equipment. 

4.  The Doppler is not explosion-proof and can’t be used in the presence of flammable 

anesthetics. 

5.  Make sure that your hand is clean and dry before touching the power button. 

6.  Do not connect any equipment or accessories that are not approved by the manufacture 

7.  Do not heat or throw batteries in fire as this may cause explosion. 

8.  Do not short-circuit the batteries or install the batteries reversely.