7.2
Referencing during operation
Sensor errors lead to a growing horizontal deviation of the orientation. There-
fore the referencing of the KeTop must be repeated from time to time. The user
can check the accuracy of the current orientation at any time by activating the
orientation button of the KeTop (see
fig. 5-1 "Membrane keypad for KeTop
). The display will show a symbol with a compass indicating
the supposed referencing direction. As soon as the orientation of the device
matches the supposed referencing direction, the compass needle will change
its color from red to green. A necessary reset of orientation is performed by
holding the KeTop T10 into the defined direction and pressing the reference
button (see
fig. 5-1 "Membrane keypad for KeTop T10" on page 25
Information
●
Every 10 minutes the referencing of the KeTop T10 become invalid au-
tomatically and the icon for "Reference lost" is shown. The operator is
forced to re-reference the device.
●
By a fast position change (e.g. by a fall) which exceeds the measuring
range, the reference can become invalid. The exceeding of the measuring
range ist detected automatically.
●
During the heating phase of the device a higher drift of orientation can
occur. This phase can last up to 30 minutes.
●
Long working phases or fast temperature changes can lead to a higher
deviation of orientation. This can be improved by placing the KeTop
T10 from time to time for approx. 20 seconds into an steady position (e.g.
in the wall bracket). Thereby the inertial sensors of the device will be
automatically recalibrated.
Operating behaviour
KeTop T10
© KEBA 2014
Project engineering manual V1.02
36
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