Manuale di Istruzioni
Instruction Manual
58-E4800 Rev. 4 EN 21/05/2012
3.3.9 Recommendation for the proper use of the ultrasonic tester
If the meter is not programmed to be used for a long time it is essential to remove the
batteries, otherwise the meter could be damaged and the batteries could loose the residual
charge so it will be impossible to switch on the meter and to display the message “Battery
low”.
Both the probes have to be connected perfectly to obtain reliable readings.
If the reading is not stable (changes bigger than ±1 ms), try to improve the reading by
applying more contact paste between probes and specimen.
In general, placing the probes in air at a distance of 23-25 cm one from the other, the
display should show the message “Tp = OVERFLOW”. The same message is given
when, testing concrete, the distance between the two probes is too big or when the
concrete quality is very poor or the porosity is very high.
Where the concrete presents irregular surfaces they should be ground to make them as
smooth as possible and a suitable amount of concrete paste should be used to ensure the
best contact possible.
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