zebris Medical GmbH
PDM/PDM mobile Technical Data and Operating Instructions
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6.2
Checking the PDM Platform
6.2.1 Control measures
WARNING
The correct measuring function of the PDM Platform must be
checked at regular intervals to ensure that the measuring system is
functioning properly.
Should any damage to the measuring surface become evident (e.g. something fell hard on
the measuring surface), no further measurements must be taken. If visible damages are
detected not further measurements are permitted.
After carrying out a baseline measurement, no measuring values may be shown for a con-
dition without any load. In addition, the force distribution images are to be checked regular-
ly for untypical measuring patterns. These include above all, line or column-shaped meas-
uring patterns deviating from the surrounding values.
Whenever faults occur or in case of doubt, the manufacturer or sales partner authorized by
zebris must always be contacted.
6.2.2 Calibration measures
The measuring accuracy of the sensors for the force distribution measurement is to be
checked from time to time using a defined application of force.
To do this, the user, knowing the body weight, can stand on the platform on one foot. The
platform must show the approximate body weight, taking the force of gravity, the sensors
at the edges that may not be subject to the full pressure, and the measuring tolerance into
consideration.
In case of deviations larger than > ±5% of max range a recalibration at manufacturers side
is required.
I case of any doubts about the accuracy of the measurement it is highly recommended to
send the platform to zebris premises for recalibration.
