Operation Manual
Hardness Tester NOVOTEST T-UD3
Page. 10
1.5.1 Ultrasonic Contact Impedance Probe U1 probe
The construction of the probe is shown in Figure 1.4 The probe has a special removable
collapsible head with a double-sided thrust washer. The thrust washer provides the convenience of
positioning the probe onto the testing product and pressing during the measurement.
1 – housing; 2 – removable collapsible nozzle;
1 – housing; 2 – removable collapsible nozzle;
3 – removable double sided thrust washer;
3 – removable double sided thrust washer;
4 – support platform.
4 – centering pipe; 5 – diamond tip.
Figure 1.4 - Appearance of the Ultrasonic Contact Impedance Probe U1
One side of the washer is flat; the other has prismatic grooves designed for the convenience of
measuring hardness on cylindrical products of different diameters. The probe with the removed washer
is used for carrying out of measurement of hardness in narrow and hardly accessible places.
To measure hardness on flat surfaces, the washer on the probe head should be installed flat to the
surface of the product, and to measure the hardness on the cylindrical surfaces, the washer on the
probe head should be installed with a side with prismatic grooves to the product.
Caution!
To ensure a better smoothness of the collapsible detachable nozzles, they are individually grounded to
each probe. Replacement of probe tips is not allowed.
1.5.2 Leeb probe
The Leeb probe has a built-in mechanism for charging the spring, which is the most ergonomic
and convenient to work with (Figure 1.5). Spring charging is provided by moving the upper part of the
probe housing downwards, after which the probe can be installed on the controlled object and
measurement can be done.
Caution!
It is forbidden to discharge the trigger of the Leeb probe “in the air”.