Welch Allyn OSZ 4 - User Manual - Manual (Page 25)

Directions For Use 17
be removed carefully with a damp cloth and soap. The cuff
must not be machine washed.
e. Do not drop the instrument or treat it roughly in any way.
Avoid strong vibrations.
Never open the device, otherwise the manufacturer's
guarantee becomes invalid.
Periodic recalibration
Sensitive measuring devices must be checked for accuracy from
time to time. Therefore, we recommend a periodic inspection of
the static pressure display every two years. Your dealer can
provide more information about this.
Guarantee
The blood pressure monitor is guaranteed for two years from
date of purchase. This guarantee includes the instrument and
cuff. The guarantee does not apply to damage caused by
improper handling, accidents, not following the operating
instructions, or alterations made to the instrument by third
parties.