Page 30 of 31 Pages
6.5. Calibrating of ZEROTRONIC sensors
Preparations:
The ZEROTRONIC sensors will regularly be supplied with 3
calibration curves incorporated, each at another temperature.
(see picture)
By newly calibrating the sensors with the Levelmeter 2000 all
the existing curves are lost.
With the Levelmeter 2000 only one curve at one temperature can be installed.
Principle of the calibrating:
The bases of all the measurements with the
LEVELMETER 2000 and the connected
sensors/instruments are the calibration data stored in
the sensor heads. Throughout the whole measuring
range a number of reference calibrating points are
stored in the sensor heads. The linearity of the
measuring range depends on the number of these
reference-calibrating points. Each measured angle
delivers a signal in form of a frequency and to these
reference frequencies the respective calibration points
are matched. From these values a calibration curve will
be established.
The measured angles between these calibration points
are computed by interpolation and displayed on the
screen in the desired measuring unit.
All sensors/instruments leaving the factory at WYLER’s
are calibrated according the measuring range and have
undergone a severe quality test procedure.
The LEVELMETER 2000 offers the possibility by superimposed 3-point calibration to impair the calibration curves
stored in the Sensor.
This corrective interference we call “Quick Calibration”. Quick Calibration can be executed on ZEROTRONIC
sensors. This method is suitable to compensate for linear errors of gain. The method is not suitable to correct
non-linear errors which originate from a damaged measuring unit.
As this method is superimposed on the calibration, the original calibration data remains unchanged. The Quick
Calibration can be repeated any number of times.
For instructions consult www.wylerag.com
Should a carefully executed Quick Calibration not condition the sensor to perform within the limits of error
according to specifications, the sensor must be sent to our service department for complete calibration with
exchange of all data sets.
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