zebris Medical GmbH
FDM-T Technical Data and Operating Instructions
Page 54/65
7.4
Maintenance of the FDM-T Sensor
7.4.1 Control Procedures
WARNING
The measuring system must be checked at regular intervals to en-
sure its correct function and patient safety.
In case the running belt has been exposed to hard knocks or heavy items have been fallen
onto it, the surface of the FDM-T sensor has to be checked for damaging (cracks, dents,
and scratches). If visible damages are detected not further measurements are permitted.
After carrying out a zero measurement, no measuring values may be shown for a condition
without any load. In addition, the force distribution images are to be checked regularly for
untypical measuring patterns. These include above all, line or column-shaped measuring
patterns deviating from the surrounding values.
NOTE
In order to guarantee the correct functioning of the speedometer
long-term, the central position of the belt must be checked monthly
according to the instructions supplied by the treadmill manufacturer,
and readjusted, if required.
Whenever faults occur or in case of doubt, the manufacturer or sales partner authorized by
zebris must always be contacted.
7.4.2 Calibration Procedures
The measuring accuracy of the FDM-T sensor 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 the measuring results show a deviations larger than > ± 5% of full measuring
range, a recalibration by the manufacturer is required.
If any doubt exists about the measuring accuracy of the FDM-T sensor, it is recommended
having the force-distribution measuring sensors checked and re-calibrated by zebris, to
ensure that the specified measuring accuracy is correct.
NOTE
On request service instructions for assembling and disassembling of
the FDM-T sensor from the treadmill can be supplied for various
treadmill types, for enabling this task to be carried out by trained
maintenance personnel at cu
stomer’s side.