NDT W-D-2005 User manual

W-D-2005, W-D-1705, W-D-1505
Digital Hardness tester
Instruction Manual
James Instruments Inc.
3727 N. Kedzie Avenue
Chicago, IL, 60618
Phone: [phone]
1-800-426-6500
Fax: [phone]
www.ndtjames.com

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CONTENTS
1OVERVIEW............................................................................................................... 4
2MEASUREMENT...................................................................................................... 6
2.1 MEASUREMENT PRINCIPLE................................................................................6
2.1.1 Impact direction................................................................................................ 6
2.1.2 Surface texture................................................................................................. 6
2.1.3 Moisture effect.................................................................................................. 6
2.1.4 Selection of the test area..................................................................................7
2.2 TESTING PROCEDURE........................................................................................7
2.2.1 Test area.......................................................................................................... 7
2.2.2 Hammer positioning ......................................................................................... 7
2.3 DATA ANALYSIS ................................................................................................... 7
3MENUS ..................................................................................................................... 7
4KEYS ........................................................................................................................ 9
4.1 POWER SWITCH........................................................................................................ 9
4.2 UP ARROW...............................................................................................................9
4.3 DOWN ARROW.......................................................................................................... 9
4.4 ENTER KEY ..............................................................................................................9
4.5 ESC KEY.................................................................................................................9
4.5.1 Exiting Print Mode............................................................................................9
4.5.2 Entering Test Routines.....................................................................................9
4.5.3 Exiting Test Mode.............................................................................................9
5OPERATING MODES............................................................................................. 10
5.1 REBOUND ........................................................................................................... 10
5.2 ANGLE.................................................................................................................11
5.3 CONFIG............................................................................................................... 11
5.4 UPLOAD DATA....................................................................................................11
5.5.1 Upload procedure.............................................................................................. 11
5.5 PRINT ..................................................................................................................11
5.5.1 Communication Link Specifications................................................................ 11
5.5.2 Printed Format................................................................................................ 12
5.5.3 Operation........................................................................................................ 13
5.6 SET CLOCK......................................................................................................... 13
5.7 CAL HAMMER...................................................................................................... 13
6TEST FUNCTIONS................................................................................................. 14
6.1 TEST KEYS.......................................................................................................... 14
6.2 TEST DISPLAY.................................................................................................... 14
6.3 TEST SERIAL COMM .......................................................................................... 14
6.4 TEST DATA MEMORY.........................................................................................14
6.5 SET HAMMER ZERO...........................................................................................15
6.6 INIT MEMORY &TN.............................................................................................15
6.7 TEST ADC............................................................................................................ 15

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6.8 TEST PRINTER.................................................................................................... 15
7INITIALIZATION (PLEASE NOTE THIS PROCEDURE HAS BEEN PERFORMED
AT THE FACTORY AND IS LEFT HERE FOR REFERENCE PURPOSES ONLY)..... 16
7.1 INITIALIZE MEMORY AND TEST RECORD NUMBER ......................................................16
7.2 SET HAMMER ZERO ................................................................................................ 16
7.3 CALIBRATING THE HAMMER ..................................................................................... 16
7.4 INSTRUMENT CONFIGURATION ................................................................................. 16
8MAINTENANCE...................................................................................................... 17
8.1 CHECK FOR PERFORMANCE............................................................................ 17
8.2 CLEANING THE INSTRUMENT........................................................................... 17
9SPECIFICATIONS.................................................................................................. 17

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1 OVERVIEW
The NDT James Instrument’s Digital Hammer is a digital meter used for measuring
the hardness of paper rolls. Menus are used to navigate through the functions of
the instrument. This manual covers the use of the W-D-2005 system, the W-D-
1705 and W-D-1505 systems. The differences among these units are the
capabilities to print the results in the field and the ability to upload data from the
instrument to a PC. The other functions of the systems are the same and this
manual covers the use of the all three systems.
The W-D-1705 system includes the field printer to obtain a hardcopy of the results
in the field, but it does not have the ability to upload data from the instrument to a
PC. The rest of the capabilities of the W-D-1705 are the same as the capabilities of
the W-D-2005 described in this instruction manual.
The W-D-1505 system does not include the field printer and neither has the
capability to upload data from the unit to a PC. Taken into account the mentioned
differences in capabilities between both systems, this instruction manual covers the
required material for the proper use of the W-D-1505 system.
The hardness tester is an instrument which is easy to use, to identify areas within a
paper roll structure with different properties (different stiffness or strength). It is also
a useful tool for quick and approximate measurement of the compression strength
of manufactured concrete products.
The principles on which it works are based on the rebound impact of a hammer on a
piston which rests against the surface of the material: the greater strength and
stiffness of the roll, the greater the rebound impact.
The test makes possible to estimate the strength of paper rolls by the energy
absorption of the material of the impact energy delivered by the hammer. The
energy absorption depends on the strength and stiffness of the paper roll, in the
absence of large inert lumps or clusters of lower density. From the impact and
using the rebound number, these areas can be identify.
With the aid of the test hammer the quality of paper rolls in different industries can
quickly be examined.

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INSTRUCTIONS FOR USE
1. Having taken the test hammer from its case, gently push the piston inwards
pressing it against a stiff surface (held the hammer with both hands when using
it). The piston will release itself from its catch and emerge from the body of the
device which will then be ready for testing.
Press the piston against the surface of the material to be tested, holding the
device perpendicularly to the surface. Gradually apply increasing pressure until
the mass impact is released. Keep the device firmly pressed against the surface
being tested and look at the rebound reading on the scale. Do not touch the
side button whilst pressing on the piston. On removing the device from the
surface being tested, the piston once more emerges completely from the device
which is immediately ready for a second test.
2. If it is difficult to see the reading under the conditions specified in the previous
paragraph, press the side button only after impact hold the button in and
remove the device in order to read the scale.
3. If the button is used, as in the above case, the piston remains inside the device
when it is removed from the surface being tested. In such cases, in order to
prepare the test hammer for further tests, activate in by the method indicated in
Paragraph 1. The position of the device when the piston has withdrawn inside is
also the position used for packing away the device in its case.

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2 MEASUREMENT
2.1 MEASUREMENT PRINCIPLE
The Digital Hammer measures the rebound number of a paper and film rolls. The
rebound number is related with the harness, stiffness and strength of the material.
There are several factors that must be taken into account when analyzing the
rebound number of rolls.
2.1.1 Impact direction
The impact direction of the system has an effect that must be taken into
account at the time to correlate the rebound data taken from different
directions, this factor it is not relevant for the paper industry. It has to
consider this point when testing paper rolls in different directions and the
results want to be compared. The system allows the user to choose the
angle of impact, which could be -90 degrees when testing in floors or
slabs type of structures or against any horizontal surface, 0 degrees when
testing against walls or vertical concrete members and finally +90 degrees
when testing in an overhead position such as against ceilings. The
reason why this is a needed parameter is because the gravity force affects
the results and this effect must be taken into account, in Fig 1. this effect
is shown in the correlation curves.
2.1.2 Surface texture
The surface texture has an important effect on the accuracy of the test
results. It is recommended to test rolls with smooth surfaces. When
testing rough textured surfaces, much of the hammer impact energy
causes excessive crashing on the surface and a reduced rebound number
is expected.
2.1.3 Moisture effect
The presence of surface moisture and the degree of saturation of the
surface may have an effect on the rebound number. It is expected to
obtain lower rebound numbers when testing wet materials.

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2.1.4 Selection of the test area
The member to be tested should be at least 10 cm thick and it should be
fixed within the structure. Testing areas exhibiting honey combing, high
porosity or scaling should be avoided.
2.2 TESTING PROCEDURE
2.2.1 Test area
The test area should be selected to obtain at least 10 readings with the
rebound hammer. In the case that it is not smooth enough, prepare the surface
of the test area by grinding the surface.
2.2.2 Hammer positioning
Take a couple of measurements on a stiff surface before perform the test to
familiarize yourself with the system and prepare it for testing and discard the
readings. Use the hammer to test the selected area. Positioning the hammer
perpendicular to the surface and deploy the impact plunger pushing against the
surface until the push button spring out.
Caution: the hammer should always be held in both hands, perpendicular
to the surface before release the impact.
2.3 DATA ANALYSIS
In order to obtain a representative rebound value, 10 readings at the same test area
shall be taken, the maximum and minimum value should be discarded and the average
of the remaining readings should be computed.
3 Menus
The following are the instruments main menu items (modes of operation).
A mode is selected by using the Up and Down Keys to display the desired mode
and then pressing the Enter Key.
REBOUND – The Rebound Mode displays rebound numbers and save it in a
Test Record.
ANGLE – The Angle mode is used to set the angle of impact, -90 degrees
(floor), 0 degrees (wall) and +90 degrees (ceiling).

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CONFIG – This mode is used to select the Operating Language (English or
Spanish) and a Discard Value. Also this mode is used to reset
the Test Number to zero.
UPLOAD DATA – This mode is used to send stored Test Records to a PC
Computer
PRINT – The Print mode is used to select and print a specific Test
Record.
SET CLOCK – This mode is used to set the time and date.
CAL HAMMER – This mode is used to calibrate the hammer with the use of a
calibration anvil.

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4 KEYS
The following key switches are used to perform the functions of the instrument.
4.1 Power Switch
Turns the instrument power on and off.
If no keys have been pressed for 15 minutes, the instrument will automatically
turn itself off.
4.2 Up Arrow
Used to scroll through the menus and increase a displayed value
4.3 Down Arrow
Used to scroll through the menus and decrease a displayed value
4.4 Enter Key
Used to select and displayed menu item. This key is also used to accept a
selected value or configuration item.
4.5 ESC Key
This multifunctional key performs different functions depending on the mode
that the instrument is in.
4.5.1 Exiting Print Mode
The ESC Key is used for two different operating conditions within the
printing mode. If the print mode is selected and no Test Records have
been saved the ESC Key is used to exit the Print Mode. The ESC Key is
also used in the Print Mode when the operator does not want to print a
Test Record but selected the mode.
4.5.2 Entering Test Routines
When power is first turned on “NDT James Inst.” will be displayed for 5
seconds. If the ESC key is pressed during this time the instrument will
use a test menu to enable the operation to perform instrument tests and
initialization. Normal instrument functions are not accessible during
testing.
4.5.3 Exiting Test Mode
The ESC Key is used to terminate the Analog to Digital test.

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5 Operating Modes
5.1 REBOUND
When this mode is selected an operator may cock the hammer and take
impact readings. The display will indicate the rebound value and the number
of impacts taken. Up to 20 impacts can be taken for a given Test Record. If
the operator requires less than 20 impacts he can terminate the Test Record
by pressing the Enter Key. The display will momentarily display “Saving Test“
and then display the Average rebound value. The operator may view the
Median rebound value by pressing the Up Arrow Key. Pressing the Down
Arrow Key completes the Test Record and the display will be as indicated
above. The Test Record Number will be automatically incremented to the
next number.
T e s t 2 3 # I 7 h h : m m
R: 37 MM/DD
Test Record Number
0 - 936 Number of Impacts 0 - 20 Current Time
Rebound Value Current Date
R: Rebound