30
3. If pregnant woman adopts horizontal position and the fetus position is normal,
put the probe on the position of lower navel midline to get the clearest FHR
sound.
4. Do not measure FHR unless audible fetal sound has been heard.
5. Please reduce the time of ultrasonic radiation as possible as you can.
4.2 Mode Selection
4.2.1 Real-time FHR Display Mode (Mode 1)
The moment when the fetal heart rate signals are detected, the fetal heart rate
bar graph on LCD indicates the strength of the fetal heart rate signals, and
meanwhile shows the fetal heart rate values and fetal heartbeat waveform.
4.2.2 Averaged FHR Display Mode (Mode 2)
This model is able to acquire more stable fetal heart rate, displaying on LCD
the latest acquisition of eight points fetal heart rate on average. When the fetal
heart rate is shown, the fetal heart rate bar graph on LCD indicates the strength
of the fetal heart rate signals, the shown fetal heart rate values and heartbeat
waveform changes slowly.
4.2.3 Manual Mode (Mode 3)
Press the start / stop button starts counting, fetal heart rate reads as “ - - -”,
the moment when the fetal heart rate signals are detected, the fetal heart rate
bar graph indicates the fetal heart rate strength. Once again press the start /
stop button to stop counting, the equipment will automatically calculate
the average fetal heart rate acquired from the beginning to the end, and also
the result will be displayed. Numerical fetal heart rate will always remain until
a repeated measurements or patterns of change.
4.3 Probe Operation
4.3.1 Inspecting Probe
When the probe falls away from the the device, LCD screen displays the “- - -”
and displays “Probe fall !”.The probe frequency data disappeared. At this
moment the probe needs to be reconnected. After connected well, LCD screen
will clear away the “Probe fall !”and display the probe frequency data.
ENGLISH
