Avoiding Measuring Errors - Powerfix Profi 91218 Operation And Safety Notes

The air bubble of the level indicator should
be between the two markings
alignment is horizontal.
P ress the READ button
projects a dot of light onto the end point of
the measurement. This dot of light will help you
to correctly align the ultrasonic rangefinder.
After successful measuring, the length will
appear in the display.

Avoiding measuring errors

In order to avoid measuring errors,
please note the following information:
T he measurement is performed by ultrasound,
which travels from the ultrasonic transmitter
in a conical manner. The ultrasound is reflected
from the target area and received by the ul-
trasonic receiver. The ultrasonic rangefinder
calculates the measured length (Fig. B) from
the travel time of the signal.
In order to guarantee an exact measure-
ment, the following conditions must be
maintained (Fig. B):
T he reference area (A) must be parallel to the
target area (B).
T he distance to be measured must be be-
tween 0.6 m and 16 m long.
T here must be no objects in the conical path
of the ultrasound, which could reflect the ul-
trasound prematurely. The conical path of the
ultrasound has a width of about 5 m at a
length of 16m.
T he target area must have a smooth surface,
so that the ultrasound can be well reflected.
. The laser diode
4
GB/CY
if the
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1
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