DMQ QH5 U User manual

P/N: QHDU 501 –ENG –Rev 01 –2017

I
Chapter 1
First steps
1.1
Know the QH5 U
1
1.1.1
Front panel
1
1.1.2
Connectors
2
1.2
Install or replace batteries
3
1.3
Connecting the UCI probe
5
1.4
UCI probe components
5
1.5
Using the UCI probe
6
1.5.1
UCI probe configuration
6
1.5.2
Measuring: preloading and loading
8
1.6
The “Q” key
9
1.7
Display illumination and contrast
9
1.7.1
Display backlight illumiination
9
1.7.2
Display contrast
10
1.7
Locking and unlocking the keypad
10
Chapter 2
Measuring with the QH5 U
2.1
Numerical measuring screens (Normal)
12
2.1.1
Mode-1 screen (Datalogger)
12
2.1.2
Mode-2 screen (Material)
13
2.1.3
Mode-3 screen (Statistics)
13
2.2
Key functions in numerical measuring modes
14
2.3
Graphical measuring screen (Histogram)
16
2.4
Key functions in graphical measuring modes
17
2.5
Selecting material and hardness unit
17

II
Chapter 3
Menu system and editing
3.1
Instructions on using the menu system
19
3.1.1
Text editor
20
3.2
Main menu
22
3.2.1
Change hardness unit
22
3.2.2
Alarm settings
23
3.2.3
Set histogram range
23
3.2.4
Select language
24
3.2.5
Unit information
24
3.3
General configuration options
25
3.3.1
Time and date
25
3.3.2
Time and date format
26
3.3.3
Keypad sensitivity
26
3.3.4
Auto-off time
27
3.3.5
Display display contrast
28
3.3.6
Beep activation
29
3.3.7
Introduction screen
29
3.3.8
Owner information
29
3.3.9
Lock configuration options
30
3.3.10
factory default settings
31
3.4
Measuring configuration (Hardness)
32
3.4.1
Select material
32
3.4.2
Creating user materials
33
3.4.3
The “Plus” key
37
3.4.4
Group (N) number
38
3.4.5
Indentation dwell time
38
3.4.6
Measuring filter
39
3.4.7
Measuring modes
40
3.4.8
Factory default settings
41

III
Chapter 4
Using the Datalogger
4.1
Understanding how data is organized
42
4.2
Memory menu
43
4.3
Create a new file
43
4.4
Actions over single files
44
4.4.1
View data in a single file
45
4.4.2
The “Q” key in a grid
46
4.4.3
The “Q” key in a histogram
47
4.4.4
Rename file
47
4.4.5
Send data in file
48
4.4.6
View file size
48
4.5
Actions on all files
48
4.5.1
Send all files
48
4.5.2
Erase all files
49
4.6
Quick memory menu (Mem key)
50
4.7
Connecting to a PC with DataCenter
51
4.8
Datalogger configuration
52
4.8.1
Configure communications
52
4.8.2
Capture modes
53
4.8.3
Advanced configuration
54
Tips on how to measure correctly
55
Measuring ranges and hardness units
55
Technical specifications
57
Additional information
59
Unit maintenance
59
QH5 U accesories
60
Error messages
61
Our website: www.demeq.com
62
Firmware and software updates
62
Technical support
62

IV
And thank you for purchasing a QH5 U UCI portable hardness tester.
At Demeq we develop, manufacture and distribute software and
quality control instruments offering innovation and solutions that
come as a direct result of listening to your needs as a user. We apply
some of the latest technology available in the industry to build
instruments that are robust, precise and easy to operate.
We are convinced that our products would not be complete without
permanent technical and after sales support. So in addition to quality
products we offer:
•Quick answers to your inquiries.
•Unlimited access to technical information as well as
application notes.
•Firmware and software upgrades at no charge.
•Attention to your inquiries and suggestions.
We hope that the QH5 U will meet and exceed your application
needs.

V
Information included in this manual applies to the QH5 U portable
hardness tester.
dmq is a registered trademark of Demeq S.R.L and its affiliate
companies.
The information contained in this manual is intended to educate users
on the operation of the QH5 U hardness testers. Failure to read and
understand this manual can lead to measurement errors. Decisions
based on measurements and or results that are erroneous can lead to
property damage, personal injury or even death. Demeq S.R.L assumes
no responsibility as a result of improper use of our instruments.
ASTM A1038
Correct use of a UCI hardness tester requires that you take all of the
following into consideration:
•Select the UCI probe that is best suited for your application.
•Know the specific requirements for the test you will be
conducting.
•Make sure that the person operating the unit has been
trained on its use.

VI
This manual provides all of the information needed to configure and
operate the QH5 U portable hardness tester. However there are
additional factors that can affect tests done with this instrument.
Specific information on those factors is outside the scope of this
manual. When in doubt you should always seek expert advice or refer
to specific textbooks on portable hardness testing. Additional
information can also be found on the internet and through local
government agencies as well as in technical institutes.
The QH5 U operates on the UCI or Ultrasonic Contact Impedance
method of hardness testing where just like in conventional methods
such as Vickers, Brinell or Knoop, hardness values are obtained by
applying constant force to an indenter which generates an
indentation on the part being tested. But where as in conventional
methods further optical evaluation is required, with the QH5 U
readings are processed electronically and instant measurements are
obtained in the most common hardness units.
Figure 1: UCI probe
Figure 1 represents a UCI probe where the indentor Pis normally a
Vickers type synthetic diamond cemented to an oscilating rod Vwhich
is excited by a transmitting element Tat a frequency that changes
according to the depth of the indentation generated on part m.
Frequency changes are detected by a receiver Rand finally