Little Martin’s BFD1609, User Manual, Page: 18 / 19

Common
problems
There is no
reaction after
pressing power
on button or
product powers
off too soon.
There are values
on LCD but no
sound.
Too much noise
while using the
device.
There is sound
but no values on
LCD, difficult to
find the position
of the fetal heart.
Random values
appear frequent-
ly on the LCD
when using the
device.
Possible causes
1. Battery is low.
2. Batter is in bad
contact.
3. Placement of the
battery is incorrect.
4. Device failures.
1.Volume is at the
minimum.
2. Earphones of speaker
incorrectly inserted.
1. There is no coupling
agent.
2. Moving the probe on
the skin of abdomen
causes noise.
3. Probe is not placed at
the optimal position.
1. There is no coupling
agent between probe
facet and abdomen skin.
2. Gestation period is
the short, fetal heartbeat
is weak.
1. The friction between
the probe and abdomen
skin causes. the wrong
random values during
looking for right position
of fetal heart.
2. There is
electromagnetic
interference around,
such as high frequency
generator machines
which create electrical
spark, and cellphones.
3. There is fetal
movement, which means
the position of fetal heart
may have changed.
Solutions
1. Change battery.
2. Ensure battery is in good
contact.
3. Insert the battery correctly.
4. Send the device back to
manufacturer for repair.
1.Adjust the volume to the
proper lever.
2. Plug the earphones or
speaker correctly.
1.Use coupling agent.
2. Do not allow the probe
to come in contact with the
skin while searching for the
fetal heart. Find the right angle
between probe facet and skin of
the abdomen to get the clearest
fetal heartbeat sound.
3. Look for the right position of
the fetal heart again.
1. Make sure that there is
enough coupling agent
between the probe facet and
abdomen skin.
2. Use the device after longer
gestation period, fetus is bigger.
1. Find the position where the
fetal heartbeat sound is the
loudest, keep the probe static
for 10 seconds, then the values
on LCD are real instant fetal
heart rate.
2. Use the device in a place
without interferences.
3. Adjust the position of the
probe, making sure that the
probe is where the fetal
heartbeat sound is the loudest.
17
Troubleshooting