NewSonic SonoDur2 Issue 04 09/2016 Page 29
7.4.3 Manual Measurement without Switching Sleeve:
After removing the switching sleeve, (in the picture on the left, Figure 7.19) the measurement will be
started by touching the probe symbol on the SonoDur2 display or by pressing and holding the micro-
switch.
Example – Measurements with Probe Shoe:
Measurement points can be set in close distance from each other without lifting the motorized
probe. After reaching the upper position (end position) of the Vickers diamond, slightly shifting the
probe and touching the probe symbol on the device is sufficient in order to take a new
measurement.
Attention:
In order to prevent damages to the surface or to the Vickers diamond as a result of shifting the probe
too soon, it is absolutely required to wait until the upper probe position has been reached!
Example – Motorized Measurements without Probe Shoe:
In this configuration, however, the vibrating rod of the motorized probe, is free and can be easily
damaged by careless handling (Figure 7.17). This configuration is only recommended, when
operating with a stand, good probe guidance and defined distance between probe tip and test object
or by very well trained and experienced operating personnel. By unscrewing the protection sleeve,
the probe rod is optimally protected against mechanical damages (Figure 7.18). However, stable
probe guidance is also required in this case.
In both cases, the measurement is triggered via touch screen command or by pressing the micro-
switch on the underside of the probe.
Free Measurements with Protection Sleeve:
The probe is gently placed onto the test object, and the measurement commences. It must thereby
be ensured that the probe will not be tilted during the measurement phase. After the measuring
time has lapsed, the vibrating rod returns to its initial position.
When performing such manually operated measurements, it can easily happen that a slight tilting of
the probe occurs during the motor movement. This is due to the small surface area of the circular
protective tube. Hence, the hardness measurement value could be indicated too low. This effect can
be avoided by pressing firmly on the test object surface with both hands and keeping it still, after the
probe has been placed. Another possibility is to only hold it softly at first, so that the motor is
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