© ElektroPhysik
QuintSonic 7
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Air is a totally unsuitable couplant and does not provide any results. Even if the sensor head is
firmly pressed onto the object to be inspected, an air gap will remain. Hence, the use of a suitable
couplant is vital for measurement.
QuintSonic 7 can be used with three different types of couplant:
clean water (preferably distilled water)
glycerin (included in the supply schedule)
ElektroPhysik coupling gel (supplied as an option)
With the above listed couplants, the viscosity (as a measure of the „thickness“ of a fluid) increases
from water to coupling gel. Generally, you can assume the lower the viscosity, the thinner and
more regular the coupling layer will be. The thinner and more regular the coupling layer has been
applied, the better will be the coupling quality. As water tends to drip or run off from the measuring
spot, especially from sloped surfaces, glycerin or coupling gel (if necessary for very difficult
applications) will proof to be the better choice. Also for curved surfaces, coupling gel will provide
the better results. The high-viscosity of such gel will
– to some extent - better fill the gap between
sensor and the curved object.
The suitability of the above listed couplants for this application has been carefully checked and
approved by ElektroPhysik. If other couplants are used, user is responsible for measuring errors or
damage to the sensor. Please note that any warranty claim will expire if the sensor is damaged by
use of couplants other than those approved by ElektroPhysik.
6.4.3
Checking / carrying out calibration
Prior to measurement, it is recommended to check calibration. If necessary, proceed on
recalibration (see also section 5). For rough or trial measurements in the Direct Mode (see section
6.3.1) or if no high accuracy is required, it is not necessary to calibrate and you can skip the
explanations below.
If the gauge has been switched off and if you wish to continue the same setting of task in the same
batch, the calibration generally remains valid so that you can continue in this setting. However,
make sure you are exactly dealing with the same measuring task. Any confusion with other, similar
measuring tasks is to be excluded.
If you switch to another existing batch, the calibration stored for this batch will become valid and
does generally apply for the measurements to follow if exactly the same measuring task is
involved. If, however, the acquisition of readings in this batch dates back to a longer period of time
or if any doubts regarding the validity of calibration for the measurements to follow arise, you
should check the calibration or recalibrate, if necessary. For calibration, use a similar material
sample. The thickness of the different layers of this sample must be known (calibration standard).