NOVOTEST T-UD2 User manual

HARDNESS TESTER
NOVOTEST Т-UD2
Operating Manual
2016

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Hardness tester NOVOTEST T-UD2
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CONTENTS
1. Introduction 2
2. Appointment 2
3. Specifications 2
4. Packing list 4
5. Principle of operation 4
6. Preparations for operation 6
7. Basics of operation 7
8. Operation 8
9. Hardness measurement 15
10. Measurement modes 22
11. Calibration 24
12. Technical maintenance, special conditions of operation 34
13. Precautions and trouble shouting 36
14. Manufacturer’s guarantee and service maintenance 37

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1. Introduction
The following operation manual explains the preparation, setup,
principles of operation, usage, and troubleshooting of the hardness
tester NOVOTEST T-UD2 and its versions T-U2, T-D2.
Please, read this instructions carefully for operate the hardness
tester NOVOTEST T-UD2 functions quickly and effectively.
In doing this you will be able to take full advantage of the function
range of the instrument. At the same time, you will also avoid errors
and wrong operation which in turn would cause incorrect test results
and thus could lead to injury and damage.
2. Appointment
The hardness tester NOVOTEST T-UD2 is handy, easy to operate
and can carry out tests quickly without any difficulties.
Hardness tester NOVOTEST T-UD2 is mainly suitable:
• for measurement hardness of low and non-alloyed steels;
• for measurement hardness of high-alloyed steels;
• for measurement hardness of nonferrous metals.
3. Specifications
3.1. Calibration scales
Device has 20 calibration scales of hardness that conventionally
divided into four scales and five materials for each:
Each of the scales can be additionally calibrated by 1 or 2 points.
Also, the unit measures in Leeb scale (with rebound probe) and
Tensile strength, through the automatic recalculation from the Brinell
scale.

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3.2. The limits of permissible basic error of measurement
Hardness scale
Error (%)
Rockwell C
±1,5
Brinell
±3,0
Vickers
±3,0
Leeb
±3,0
Tensile strength
Not rated
3.3. Working conditions: -20°C to +40°C
3.4. Overall dimensions
Name
Overall dimensions, mm
Information processing unit
125x65x25
UCI probe
Ø25х140
Rebound probe
Ø20х150
3.5. Weight of the instrument and probe
Name
Weight, kg
Information processing unit
0,10
UCI probe
0,25
Rebound probe
0,10
3.6. Power supply
Battery operation: two 1.5V AA cells:
- AlMn (approx.15 hours operation);
- Alkaline (approx.8 hours operation);
- NiCd (approx. 15 hours operation);
- NiMH (approx. 20 hours operation).
3.7. To save battery charge in the menu there is setting of device
auto switch off.

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3.8. Requirements for the test material
Surface roughness, not more, Ra
UCI (10N) probe U1
UCI (50N) probe U1
Rebound probe D1
1,5
2,5
3,2
Radius of curvature of the surface, mm
UCI probe U1
Rebound probe D1
5,0
10,0
Weight of the test material, not less, kg
UCI probe U1
Rebound probe D1
0,1
5,0
Thickness of the test material, not less, mm
UCI probe U1
Rebound probe D1
1,0
10,0
4. Packing list
4.1. Information processing unit 1 pc
4.2. Probes: UCI (10N) __ pc
UCI (50N) __ pc
UCI (98N) __ pc
Rebound (Leeb) __ pc
4.3. Charger 1 pc
4.4. Batteries 2 pc
4.5. USB cable 1 pc
4.6. Operation manual 1 pc
4.7. Carrying case 1 pc
5. Principle of operation
5.1. Rebound method
Rebound probe consists of an impact body and the capture. The
impact body has a carbide tip and a permanent magnet for

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generating a voltage pulse; the impact device has a spring
mechanism for loading and impelling the impact body, and an
induction coil for detecting the magnet in the impact body. In the
rebound hardness testing method, the speed variation caused by
the impact of the impact body against the material surface is
measured.
The impact energy is adjusted via the spring for the measurement.
The impact body contained in the tube of the impact device is
impelled against the test surface by means of the release button. In
the course of this, the magnet of the impact body induces in the coil
a voltage signal whose height is proportional to the impact phase
speed. The impact causes a plastic deformation of the material and
a permanent spherical indentation is produced in the surface. This
plastic deformation leads to a loss of energy of the impact body and
thus to a lower speed after the actual rebound phase.
The speed ratio is determined exactly at the moment of
impact/rebound by means of the special signal processing. The
speed ratio is therefore unaffected by the impact direction. As
opposed to this, other rebound hardness testers require presetting
of the impact direction in fixed steps (influence of gravitation on the
speed ratio) - which constitutes a considerable disadvantage with
frequently changing test positions.
5.2. UCI method
The Vickers diamond is fixed to the tip of a round metal rod. This
metal rod is excited, to its resonant frequency of approx. 78 kHz,
into longitudinal oscillations. When the Vickers diamond contacts the
sample surface, the resonant frequency will change. This change
happens in relation to the size of the indent area from the Vickers
diamond. The size, in turn, is a measure for the hardness of the
tested material. Resonant frequencies can be measured very
accurately. This is why the UCI method is suited to make the

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evaluation of Vickers indents, and thus of the complete test
procedure, so much easier and quicker.
There are also two additional advantages:
- the measurement is made under load. (No impairment of the
measurement due to elastic resilience);
- the hardness measurement is based on the area of the indent and
not on the length of the indent diagonals.
The measurement is thus less affected by surface roughness; even
gunmetal-finished surfaces can be measured.
Concerning the UCI method, the measurement value is also
dependent on the Young’s modulus of the material.
6. Preparations for operation
6.1. Battery supply
The hardness tester NOVOTEST T-UD2 is powered by batteries or
accumulators. For this you need two AA 1.5 V:
- dry cells (AlMn) or rechargeable (Nickel-Cadmium or Nickel-
Metalhydrid).
NOTE! The batteries must be fully charged before first use.
Using of batteries and accumulators.
Open the battery compartment. Insert the batteries, observing the
correct polarity. Close the battery compartment.
Used or defective batteries are special refuse and must be disposed
of according to the governing laws!
6.2. Connection of probes.
Socket for the probe is at the top of the information processing unit.
Connect the probe cable to the NOVOTEST T-UD2 socket in
accordance with the marks on the connector.

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7. Basics of operation
7.1. Keys
Turn on/off; left soft key
Right soft key
Modes switch
Selection of hardness scale
Navigation key; increase
Navigation key; decrease
7.2. Selection of measurement method.
7.2.1. Rebound method of measuring hardness is appropriate for:
- testing objects weighing more than 5 kg and a wall thickness more
than 10 mm;
- massive products, products with a coarse-grained structure, forged
and cast products;
- testing objects with minimal preparation of the surface.
7.2.2. UCI method of measuring hardness is appropriate for:
- testing objects with low mass and small wall thickness;

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- testing objects with a glossy surface (with special requirements to
the minimum size of the imprint);
- surfaces of the testing objects with hardened layers.
8. Operation
8.1. Preparation of the test material.
The surface must be clean and free of oil, grease and dust.
The surface roughness of the material should meet the requirements
of a specific probe (paragraph 3.8).
8.2. Features of the methods of measurement of metal hardness:
8.2.1.UCI method:
Distinct reading variations may especially occur with a mass lower
than 0.1 kg and a specimen thickness of less than 1 mm if the test
material is excited to resonance or sympathetic oscillations.
Otherwise, such test materials must be fixed to a solid base, e.g.
using a viscous paste. The same applies to the hardness test
blocks.
8.2.2. Rebound method:
With smaller and less heavy test objects, the impact effect of the
impact device may cause vibrations which could produce distorted
measurement results.
- Test objects weighing less than 2 kg must in any case be fixed to
the support using couplant so that there are no any vibrations.
- Test objects weighing between 2 kg and 5 kg must be placed on a
large metal support (e.g. a table) in such a way that they are not
moved or caused to vibrate by the impact.

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8.3. Device menu
After connecting the probe, hold TURN ON button until logo
appears on the display:
Then, you get to the main menu of the device:
The menu consists of 6 sections:
1. Measuring
2. Calibration
3. Archive
4. Settings
5. Memory card
6. Information
Scroll through the menu using the navigation keys and
, for entering press soft key SELECT using .
Soft keys

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8.3.1. Measuring
Selecting Measuring, you go to the measurement of hardness
mode, depending on the probe at the top of the screen will display
the angle of the probe (for rebound probe), or the state of the
diamond indenter (for UCI probe).
Detailed description of the measurement of hardness, see
paragraph 9.
8.3.2. Calibration
Selecting Calibration, you go to the table of calibrations where the
scale conventionally divided into four hardness scales: Rockwell
(HRC), Brinell (HB), Vickers (HV), User (U1). Each of the scales can
be calibrated to 5 conventional materials: Steel (ST), Alloy Steel
(AST), Stainless steel (SST), Cast Iron (CI), User material (U1).
Detailed description of the calibration process, see paragraph 11.

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8.3.3. Archive
Selecting Archive you go to the list of saved measurements, which
displays Measurement name, Scale, Material and Average Value.
You can store in memory up to 1024 measurements.
Scroll through the list using the navigation keys and
.
8.3.4. Settings
Selecting Settings you go to the settings menu, there are 2:
-Measurement settings:

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- Device settings:
8.3.4.1. Measurement settings
By selecting Measurement settings you can configure the following
settings:
Result: displaying measurement results can be Current (display
instantaneous values of measurements) and Average (unit
accumulates the series of measurements and display average value
of hardness).
Tolerance, %: This parameter is used only for Smart mode. Set the
% value adjusts the range of deviations of measurements to be
included in the calculation of the average for the series in Smart
mode. Detailed description of the Smart mode, see paragraph 10.3.
Retro: allows you to return to the measurement mode with saved
last measurements after restarting of the device.

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8.3.4.2. Device settings
Language: selection language of the device menu (available
English, Spanish, Russian).
Brightness: setting the brightness of the backlight.
Sound: there are 4 modes of device sound (Off, Key, Measurement,
Key and Measurement)
Auto Off: setting of the automatic shutdown device when it is not in
use.
8.3.5. Memory Card
Selecting Memory Card you go to the menu of memory.
8.3.5.1. Create backup copies of calibrations.

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After calibration of the probe is recommended to create a backup
copy of the calibration (usually the manufacturer makes the
calibration of 1-2 scales, to check the probe). This is done in order to
be able to resume adequate calibration after incorrect settings in the
future.
8.3.5.2. Load backup copies of calibrations.
After the initial save of calibrations you can always download it to
the probe. This function is needed for the resumption of adequate
calibration in case of wrong settings of the probe.
8.3.5.3. Clear SD card
Clearing saved records in the archive, after clearing SD card the
archive will be empty.
8.3.5.4. Memory state

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This menu displays the total, used and empty memory cells.
8.3.6. Information
In this menu you can view information about the manufacturer and
offices around the world.
Scroll through the list using the navigation keys and
to see NOVOTEST dealers and general information about
the device.
9. Hardness measurement
9.1. Using of the UCI method
The design of UCI Probe is shown in Figure 1a. Probe has a special
removable collapsible nozzle with the puck (Figure 1b). The puck
provides the convenience of positioning the probe relative to the
testing object and a clip for the measurements

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.
Figure 1a. UCI Probe U1
1 –Probe’s body; 2 –Collapsible nozzle;
3 –Puck; 4 –Place for fingers
Figure 1b. Demounted nozzle
1 –Probe’s body; 2 –Nozzle main part;
3 –Puck; 4 –Protective tube;
5 –Diamond.
One side of the puck is flat to using probe on flat surfaces. Another
side has grooves for using a probe on cylindrical surfaces.
It is marked slots designed for ease of measurement of hardness on
cylindrical products of various diameters. Probe with demounted
nozzle is usually using to measure hardness in difficult places, such
as narrow or deep groove.

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The probe may be removed from the nozzle is used for measuring
the hardness in the narrow and hard to reach places.
Figure 2
Turn on the hardness tester pressing , and select the
measurement mode by pressing . Detailed description of the
modes, see paragraph 10.
Then select the scale and material hardness for which there is a
proper calibration (How to calibrate device see paragraph 11). For
select the hardness scales press and chose the scale by
Material
Scale
The state of the diamond
indenter (ready for
measurement)

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keys and , then press and chose the
material.
During the measurement you can select other hardness scale. The
displayed measurement reading will be converted according with the
new hardness scale if it is calibrated.
NOTE! Calibration of UCI probe is carried out by the direct method,
so the conversion is carried out on the basis of pre-calibration, and
does not correspond to any standard.
Install the probe puck on the sample surface, keeping it in the tough
skirt as shown in Figure 3a. By clicking on the skirt thrust both hands
to bring the diamond tip of the probe perpendicularly to the sample
surface to the touch (Figure 3b). Slowly (in about 0.5 seconds) by
pressing with a force of (5 or 1 kg depending on probe type) thrust
skirt, push the diamond tip into the metal surface, preventing
swinging (Figure 3c). After the beep, remove the probe from the
tested object.
a b c
Figure 3

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The display shows the value of hardness. The result of
measurement is displayed on the display until the next
measurement.
WARNING! Not allowed a sharp click and scratching sample by
indenter, this may lead to exceeding the allowable value of error and
damage the diamond indenter.
NOTE! The "exciter" in the probe is powered from the batteries. If
the batteries are depleted you will get erratic test results.
You can get the value of the current measurement or the average
for the series of measurements, depending on the settings in
Measurement settings menu Current or Average:
This symbol indicates
that the diamond
indenter is in contact
with the testing object
or device is not ready
for the next
measurement