A&D UA-774 - Manual (Page 13)

English 11
Blood Pressure Variations
An individual’s blood pressure varies greatly on a daily and seasonal basis. It
may vary by 30 to 50 mmHg due to various conditions during the day. In
hypertensive individual variations are even more pronounced. Normally, the
blood pressure rises while at work or play and falls to its lowest levels during
sleep. So, do not be overly concerned
by the results of one measurement.
Take measurements at the same time
every day using the procedure
described in this manual to get to know
your normal blood pressure. Regular
readings give a more comprehensive
blood pressure history. Be sure to note
date and time when recording your
blood pressure. Consult your doctor to
interpret your blood pressure data.
Troubleshooting
Problem Possible Reason Recommended Action
Batteries are drained.
Replace all batteries with new
ones.
Nothing
appears in the
display, even
when the power
is turned on.
Battery polarities are not
in the correct position.
Reinstall the batteries with their
negative and positive end
matching those indicated in the
battery compartment.
The cuff does
not inflate.
Battery voltage is too low.
(LOW BATTERY mark)
blinks. [ If the batteries are
drained completely, the
mark does not appear.]
Replace all batteries with new
ones.
The cuff is not fastened
properly.
Fasten the cuff correctly.
You moved your arm or
body during the
measurement. Make sure you remain very still
and quiet during the
measurement.
The cuff position is not
correct.
Sit comfortably and still.
Raise your hand so that the cuff is
at the same level as your heart.
The unit does
not measure.
Readings are
too high or too
low.
If you have a very weak or
irregular heart beat, the device
may have difficulty in determining
your blood pressure.
Typical fluctuation within a day
(Measured every five minutes)
Bl
ood
P
res
su
re
Systolic
Diastolic
PM AM Time
mmHg
Sleep