PULLTEST Version 2.0 YieldPoint Inc. April 2010

PULLTEST Version 2.0
YieldPoint Inc.
April 2010
Copyright © 2005 by YieldPoint Inc. The Information contained herein is the exclusive property of
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authorization from the company. The distribution of this material outside the company may occur only as
authorized by the company in writing.
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humans.
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trademark of Modicon Inc. The Bluetooth® word mark and logos are owned by the Bluetooth SIG, Inc.
Warranty and Service Policy
Product Warranty
YieldPoint Inc warrants the instruments described in this manual to be free from defects in materials and
factory workmanship to the original buyer. This warranty is contingent upon proper use of the equipment,
and does not cover equipment that has been modified or has been subjected to abusive physical or electrical
stresses. YieldPoint Inc., agrees to repair or replace, at its sole discretion, any instrument that fails to
perform as specified within 6 months after date of the original shipment from the factory, or 3 months after
the date of installation, whichever date comes first.
Yieldpoint Inc., reserves the right to make substitutions and modifications in the specifications of
equipment that do not materially or adversely affect the performance of the equipment.
New equipment may be returned within 30 days of shipment with prior approval. New items which are less
than thirty days old after shipment may be returned for credit, less a minimum restocking and testing
charge of twenty percent of the list price upon factory approval only, provided the customer pays all
shipping and handling charges. Specially ordered, or modified goods, or goods which have been used or
have been unpacked, or goods which have been shipped more than thirty days prior are not returnable.
The information contained in this manual is subject to change without notice. YieldPoint Inc. makes no
warranty of any kind with regard to this material, including, but not limited to, the implied warranties of
merchantability and fitness for a particular purpose. Further, YieldPoint Inc., assumes no responsibility for
any errors that may appear in this manual and makes no commitment to update, or keep current, the
information contained in this manual.
Service Policy
Units within the warranty period returned for repair, test, and recalibration are serviced at no charge in
accordance with the terms of the warranty policy. The Customer pays all transportation and other charges
to the factory.
Units out of warranty returned for repair, test, and/or recalibration are handled on a time and material basis.
If requested, or if costs exceed 50% of current list price, YieldPoint Inc., advises the customer prior to
making the repairs. Such repairs are performed at the customer‟s expense. Typical test, recalibration, and
repairs are 25% of the instrument‟s current list price. Transportation charges both ways are at the
customer‟s expense.
Please be sure all returns are shipped with the following information included:
1.Your company Name with Billing and Shipping Addresses.
2.A complete description of your problem, or re-calibration data.
3.The contact person at your company, with their telephone and facsimile numbers.
4.Non-Warranty returns additionally need your Purchase Order Number.
Please pack your returned instruments in their original shipping cartons, or in equivalent strong protective
shipping cartons.
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Table of Contents
1
PULLTEST
4
1.1
1.2
What isPULLTEST?
Units conversions
4
2
COMPONENTS & CONNECTIONS
5
2.1
2.2.
2.3
2.3.1.
Data Acquisition Units
Displacement Sensors
Pressure Cell
Load Cells
3
PC WINDOWS SOFTWARE
5
5
6
6
9
3.1.
3.2
3.3.
3.4
3.5
3.6
3.7
3.8
What is PullTest/PC?
Using Pulltest
The Test Info Tab.
The Pull Test Tab
The Pull Test (Time) Tab
The Reporting Tab.
The Config Tab.
The Comms Tab
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10
11
12
13
14
16
17
3
1. Introduction
1.1.What is PullTest?
PullTest is a system for accurately and efficiently monitoring pull test on bolts and anchors. A
Data Acquisition (DAQ) unit converts signal from displacement, load and pressure transducers
directly to the USB port of a PC or the BlueToothTM port of a PC or Pocket PC. This enables the
test to be monitored in real time so that pass/fail criteria can be applied in the field, resulting in
more proactive test programme management through optimization of the number, type and
location of tests.
PullTest has been designed to be low cost and low weight (8 lbs). The user can select to minimize
weight and inconvenience further by using a Pocket PC (HP iPAQ) to read and store the data, as
opposed to the standard laptop PC interface. More importantly the Pocket PC provides a backup
precaution in case the laptop computer fails. In fact, all aspects of PullTest design incorporate
redundancy features which include:



displacement measurement based on two independent sensors
an interchangeable backup load is provided, and
load can also be calculated based on a measurement of the in-line pressure.
This design strategy ensures that the system will continue to operate even under the most testing
scenarios.
Reporting tools enable plots to be prepared easily and efficiently, so that a presentation can be
made to a customer or client within minutes of the test program being completed.
1.2 Units Conversions form Metric to Imperial
PullTest works with and stores data in metric units. However options exist to work in imperial
units without inconvenience. Should conversion factors be required they are listed below.
Metric To Imperial
Imperial to Metric
1 inch =25.4mm
1kN = 0.1004 tons (2240lbs)
1kN = 0.1124 short tons
1 metric tonne =1.102 short tons
1 MPa = 145psi
1kPa = 0.145psi
1mm = 0.03937”
1 ton(2240lbs) =9.964 kN
1 short Ton = 8.896kN
1 short ton = 0.9071 short tons
1psi=0.006894MPa
1psi = 6.894kPa
Table 1: Units conversions
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2. COMPONENTS and CONNECTIONS
2.1. Data Acquisition Units.
PullTest hardware components combine analog sensors to monitor load and displacement and a 4
channel, 12-bit data Acquisition unit. The Data Acquisition unit (DAQ) streams data to a USB
port of a PC.
2.2 Displacement Sensors
The two displacement sensors operate using a magnetostrictive principle that measures the
relative position of a flexible waveguide and a ring-magnet.. This transducer has the advantage
that there is no physical connection across the loading jack, so that if the bolt ruptures the sensor
will not be damaged. The specification sheet for the displacement sensors is provided in
Appendix A1. PullTest enables either a single displacement sensor or a pair of displacement
sensors(average result plotted) to be used to monitor the pull test.
The two displacement sensors are fully interchangeable and can be plugged into either port 1 or 2
on either DAQ unit. PullTest/PC must be modified depending on which port is used.
Figure 1. The magnetostrictive displacement sensor. The extended red probe is the
waveguide.
2.3 In–Line Pressure Cell.
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The load applied to the bolt can also be calculated based on the line pressure multiplied by the
area of the ram (see section 3 below). The pressure cell is rated for a range 0-69MPa or 010000psi.
Pressure Cell
Figure 2. The in-line Pressure Cell
2.4 Load Cells.
Two load cells are provided with the PullTest system.
Load cell 1
Load Cell 1 is a rated for 50000lbf with an output of 10mV FS. The sensing element incorporates
bonded foil strain gages of the highest quality and is sealed for protection against most industrial
environments. To obtain accurate results with the load cell it is imperative that the lower surface
be evenly load. Therefore a stainless steel disc with a central hole is provided on which the load
cell must sit. It is recommended that a sacrificial washer be used at the upper surface of the load
cell to avoid damaging the finish.
The specification and calibration sheets for the load cell is provided in Appendix A2
Load cell 2
Load Cell 2 is a rated for 80000lbf with an output of 10mV FS. This load cell is generally less
accurate (2% non-linearity compared with 0.25% for load cell 1) than load cell 1 and is provided
as a lightweight backup load cell. For accurate load measurement it is imperative to ensure that
load cell 2 is aligned concentrically to the bolt shaft, and that eccentric loading is avoided.
The specification and calibration sheets for the load cell is provided in Appendix A2
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a. Load cell 1
b. Load cell 2
Figure 3 The load cells. Load cell 2 is intended as a lightweight backup
2.5 Connections
The transducers must be attached to the two DAQ systems as indicated in Figure 4. Both DAQs
are turned on/off by the rocker switch - white dot depressed is on.
Each DAQ has a 9V battery power source. It is recommended that the battery be replaced at the
beginning of each day‟s testing. Turning the system off between tests will conserve battery
power.
IMPORTANT: The DAQ should be turned off before connecting or disconnecting sensors.
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Disp 1
Disp 2
USB
On/Off
Load
Pres
USB DAQ Unit
Figure 4. Connections to the DAQ Unit
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3. PULLTEST/PC: PC Windows Software
3.1 What is PullTest/PC?
PullTest is a PC database application for automated real-time monitoring of pull tests. Data from
an external DAQ unit is streamed through the USB port at a rate of approximately 10
readings/second. During a test the application allows the user to observe the detailed pull test
response, either as load versus displacement, or load + displacement versus time,. All graphs can
be saved or printed as JPEGs, and data can be exported to both MS Word and MS Excel. . Realtime reporting allows the user to optimize the number and type of pull tests within a test series,
provide the client with immediate results, and it also minimises or eliminates time spent preparing
a final report.
3.2 Using PullTest
The application is laid out in a tabular format which allows rapid access to the information
required. When the form loads it will always display the Test Info tab. To move from field to
field you can use the Tab key on your keyboard, or click on the field using the mouse.
The first time the program runs after it is installed, a message box will appear which indicates that
the database does not contain any records. In order to begin performing tests, a new test series
must be added to the database by clicking the “Add a new series” button on the main form.
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Tab 1: Test Info
Figure 5: The Test Info tab.
3.3 The Test Info Tab.
3.3.1 Series Information:
The series information applies to all tests done for that series. Click the “Add a new series button”
to create a new test series. The only required information is a series name, which is entered at the
prompt. The current date is automatically entered in the Date field but can be changed by typing
the preferred date in the field.
Once a series exists in the database, it can be selected by clicking the Series dropdown list. If
there are a large number of series in the list, typing the first few letters of the series will bring up
the closest match in the list. Simply hit the Enter key on the keyboard to select that series. When
the program opens, the series are sorted in descending order on the Date field, so that the most
current test series is displayed first.
The Company and Mine fields are both dropdown lists. Choose an existing entry in the list, or
type in a new one. After typing in a new company or mine, hit the Enter key on the keyboard to
permanently “save” an item in the list.
The Level, Drift/Intersection, Testing Team, and Notes are text fields. Use the tab key or click on
a field to edit.
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3.3.2 Test Information:
Each test series can contain a maximum of ten individual tests. The test information can be
entered before or after a test is run. Use the Test Number dropdown list to select a particular test,
or click on the Previous or Next buttons to navigate through tests.
Most fields in the Test Information section are dropdown lists with pre-set entries, however, they
will accept any user text entered.
The Test Complete field is a non-editable field which automatically changes to „Yes‟ once a test
has been run.
3.4 The Pull Test Tab
Current Test Number
Figure 6. The Pull Test tab
The Pull Test tab displays the real time graph for an individual test. On this graph, Load is plotted
directly against Displacement. The name of the series is displayed at the top of the graph, and the
dropdown list at the top indicates which test number is being run.
Once the correct test is selected and the serial or usb is connected to the PC, click the “Start Test”
button to begin. The remaining buttons will now be enabled. Data can be plotted and saved at
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different intervals, and can be shown in Metric or Imperial units. Both of these settings are found
on the Preferences tab.
To “zero out” the Load data or the Displacement data, click the corresponding Zero button in the
lower right corner. At any time during or after a test, click the Pull Test(Time) tab to view the
current test being simultaneously plotted as Load and Displacement against Time. Click the Pull
Test tab to return to the original graph.
To end a test, click the Stop Test button. The data is saved and the incoming data is no longer
plotted on the graph. The saved data is now viewable on the Reporting tab, but a copy of the
individual pull test graph can be saved as a JPEG by clicking on the Save button in the lower left
corner, or printed directly to a printer by clicking the Print button.
To continue with a new test in the same series, simply click the Next Test button and the graph is
ready to start a new test. Click here for information on zooming in on graphs
3.5 The Pull Test (Time) Tab
Figure 7. The Pull Test (Time) tab
The Pull Test (Time) tab displays the real time graph for an individual test. On this graph, Load
and Displacement are plotted individually against time in Seconds. Load is shown on the left axis
in blue, and Displacement is shown on the right axis in red. If a test exceeds 90 seconds, the
graph will begin to scroll to the right to show the most current incoming data.
The name of the series is displayed at the top of the graph, and the dropdown list at the top
indicates which test number is being run.
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Once the correct test is selected and the serial or USB is connected to the PC, click the “Start
Test” button to begin. The remaining buttons will now be enabled. Data can be plotted and saved
at different intervals, and can be shown in Metric or Imperial units. Both of these settings are
found in the Config tab.
To “zero out” either the Load data or the Displacement data, click the corresponding Zero button
in the lower right corner. At any time during or after a test, click the Pull Test tab to view the
current test being simultaneously plotted as Load versus Displacement. Click the Pull Test (Time)
tab to return to the original graph.
To end a test, click the Stop Test button. The data is saved and the incoming data is no longer
plotted on the graph. The saved data is now viewable on the Reporting tab, and a copy of the
individual pull test graph can be saved as a JPEG by clicking on the Save button in the lower left
corner, or printed directly to a printer by clicking the Print button.
To continue with a new test in the same series, simply click the Next Test button and the graph is
ready to start a new test.
3.6 The Reporting Tab.
Click a test series line to
view the information for
that test
Uncheck a test series
to hide it from view
Save, Print, Export to MS Word
View test data datasheet
Figure 8 The Reporting tab shows the graph of all the completed tests for a series. Data
can be plotted in Imperial or Metric units. Series information is shown below the graph.
To view individual test information, click on the test data line in the graph.
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To remove a test from the plot, uncheck the corresponding test number in the graph legend. To
show a hidden test, re-check the corresponding test number.
Both graph axes can be moved by clicking on the axis with the left mouse button and dragging
the axis in the desired direction while the mouse button is held down. The axis can also be
scrolled using the wheel button if your mouse has one.
Zooming in on graphs: To zoom in on an area in the graph, use the mouse to „draw‟ a rectangle
around the area to be viewed.
Start with your mouse pointer positioned at the top left of where you would like your selection to
begin. Click and drag using the left mouse button and move your mouse diagonally down and to
the right. You will see a grey outline of a rectangle to use as your guide. Once you have the
desired area selected, release the left mouse button and the graph will zoom in to that area.
To return the graph to its original view, draw the rectangle in reverse. To see a demonstration of
this, double-click the short movie clip below. 
Figure 9. A video clip indicating how to use the Reporting Tab.
This graph can be saved as a JPEG by clicking the Save button, printed directly to a printer by
hitting the Print button, or exported to MS Word by clicking the Export to Word button.
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If there is no existing test data for a series, a message box will display when the Reporting tab is
clicked.
Raw data:
The raw data can be viewed by clicking the Datasheet button on the lower right corner of then
reporting Tab. All data is saved in the database with metric units.
Export Series and test
data to MS Excel
Figure 10. The raw data
Delete one row of data at a time by clicking on the desired row at the „ReadingNo1‟ column
which will highlight the selected row in green. Click the “Delete Row” button to permanently
delete that row.
To export all the data to MS Excel, click the Export to Excel button at the top right on the
Datasheet form. The series information is exported along with the test data.
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3.7 The Config Tab.
Figure 11 The Preferences Tab. The graphing preferences determine which port the displacement
sensor is plugged into , and whether the load value is based on a pressure cell plugged into port 3
or a load cell plugged into port 4. Although data is streamed drom the DAQ unit at 0.1mm
intervals the interval between saved values and plotted values can be varied. Finally the
calibration coefficents for the load and pressure cell s are input on the RHS. The should only be
changed if the transducers are replaced or the recalibrated.
Graphing Preferences:
The Figure shows a top view of the DAQ/PC with the location of the 4 ports indicated. It is
imperative that each transducer be plugged into the appropriate port.
Units dropdown list – select either Metric or Imperial from the list. This preference applies only
to the values plotted on the graph. Metric values are always written to the database.
Displacement dropdown list – select Port1, Port 2 depending on which port the displacement
sensor is plugged into. Select average to use an arithmetic average from both displacement
sensors.
Load/Pressure dropdown list – select either Load cell (Port 4) or Pressure cell(port 3) depending
on which transducer the load value is based on.
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Set Timer Defaults:
Plotting and saving intervals can be the same value, or set to different values.
Plot Interval – select the frequency in seconds in which the graph will plot a point of data when
running a test.
Save Interval – select the frequency in seconds in which the program will save a point of data to
the database.
Load Cell/Pressure Cell Parameters:
Default Load Cell – select Load Cell 1(port 4) or Load Cell 2(port 4) from the dropdown list.
The Area of the Ram depends on the capacity of the ram used for testing.
Load Cell Coefficients. and Span values are pre-entered for the Load and Pressure equipment,
based on the specification and calibration data provided in Appendices A2 and A3
3.8 The Comms Tab
Figure 12. The comms Tab
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The Comms tab is primarily used to select a COM port and then ensure that COM port is
functional and correct. Click the “Open Comm Port” button to open the default COM. Any error
messages are displayed in the main screen. If the COM is correct and the USB is plugged in to the
PC, the incoming raw data should be shown in this window as well. Click the “Close Comm
Port” to close the port and free up the COM for testing. If you have ensured that the USB is
properly connected, and there is no incoming data being shown, the most likely reason is that the
COM port number selected as default is not correct.
Click the “Scan for Available Comms” button to scan the PC for any usable COM ports. Select
the port to be used from the dropdown list.
Figure 12 The Com Port settings
Click OK to close the form and use the selected port, or click Cancel to abort.
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