7) FHR Alarm
If FHR beyond the established upper or lowest limit of normal FHR exceeds the established
delay time, an alarm is made.
▣ Order to Use the FHR Alarm Function
① Use the Volume Up/Down Key to set the value of “H” menu which means the upper limit of
FHR and that of “L” menu which means the lowest limit of FHR as you wish at the alarm
setup mode. Be careful to set the value of “H” higher than that of “L”. (See Paragraph 1 of
Chapter 3 “Alarm/Time Setup)
② If abnormal FHR is maintained for some time at the factory setup mode, set the delay time “t”
menu at one value of “10, 20, 30, 40, 50, and 60” to determine whether or not to raise an
alarm. The unit is a second. (See Paragraph 3 of Chapter 3 “Factory Setup”)
③ Check if the ALARM lamp is on. If it is off, it means that the FHR alarm function is off; so
press the Alarm key to turn on the ALARM lamp.
④ FHR beyond the upper or lowest limit of FHR alarm exceeds the established duration, a
signal of “Beep, beep, beep~” is made.
① To stop the signal, press the Alarm key and let the FHR alarm function off. Then, the
ALARM lamp will be off, indicating that the FHR alarm function is off.
8) Volume Control
The fetal heat beat sound measured with the Doppler Probe is outputted through the built-in
speaker, (within the equipment) and its loudness is controlled with the Volume Up/Down Key.
The volume is at eight levels from 0 to 7.
① Press the Volume Up/Down Key once to indicate the currently established value of volume at
the FHR indication section for two seconds.
② Press the Volume Up/Down Key within two seconds to change the value of volume which will
then apply to the volume of speaker.
③ Don’t press any key for two second to store the value of volume indicated at the FHR
indication window and then return it to the basic state.
④ The stored value of volume can be applied even when the equipment is switched off and
then on.
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