Welch Allyn OSZ 4 - User Manual - Manual (Page 23)

Directions For Use 15
Other possible malfunctions and their remedies
If problems occur when using the device, the following points
should be checked and if necessary, the corresponding measures
are to be taken:
Error No. Possible cause(s)
ER 1 The systolic pressure was determined, but afterwards the cuff pressure
fell below 20 mmHg. This situation can occur, for example, if the tube
becomes unplugged after the systolic blood pressure has been measured.
Further possible cause: No pulse could be detected.
ER 2 The pressure dropped below 20 mmHg without a measurement taking
place. This situation can occur if the release valve was pressed during
the measurement.
Malfunction Remedy
The display remains blank when the
instrument is switched on, although the
batteries are in place. 1.Check whether the batteries are
installed with the correct polarity, then
correct if necessary.
2. If the display remains blank, remove
the batteries, then replace them, or
exchange them for new ones.
The pressure does not rise although the
bulb is being squeezed. Check the connection of the cuff tube
and connect it properly if necessary.
The device frequently fails to measure the
blood pressure values, or the values
measured are too low or too high. 1. Fit the cuff correctly on the arm.
2. Before starting the measurement,
make sure the cuff is not fitted too
tightly and that there is no rolled-up
sleeve exerting pressure on the arm
above the measuring position. Take off
articles of clothing if necessary.
3. Measure the blood pressure again in
complete silence.
Every measurement results in different
values, although the device functions
normally and normal values are displayed. Read the following information and the
points listed under «Common sources of
error». Repeat the measurement.