Vishay DAQ_BFI_Procedure Rev2 (2)

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BFI Transient Bend Measurement Procedure Vishay - Strain Smart BFI Operating Procedure Revision 2.0 Owner: Michelle Seale and Ruben Torres April 26, 2010 Revision 2.0 Intel Confidential Page 1 of 25

Transcript of Vishay DAQ_BFI_Procedure Rev2 (2)

Page 1: Vishay DAQ_BFI_Procedure Rev2 (2)

BFI Transient Bend Measurement Procedure

Vishay - Strain Smart

BFI Operating ProcedureRevision 2.0

Owner: Michelle Seale and Ruben Torres

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Table of Contents

1 DOCUMENT CONTROL....................................................................................4

1.1 Responsible Organization....................................................................................41.2 Control information..............................................................................................41.3 Approvals.............................................................................................................41.4 Revision History...................................................................................................4

2 PURPOSE AND SCOPE...................................................................5

2.1 Purpose................................................................................................................52.2 Scope...................................................................................................................52.3 Software and hardware utilized...........................................................................5

2.3.1 Vishay Model 6200 Scanner.........................................................................52.3.2 StrainSmart 4.31..........................................................................................5

2.4 User Guides.........................................................................................................52.5 Definitions............................................................................................................5

3 OVERVIEW...................................................................................6

3.1 StrainSmart Software...........................................................................................63.2 Project Flow.........................................................................................................6

4 SETTING UP THE SCANNER FOR STRAIN MEASUREMENTS...............7

4.1 Setting up the Hardware......................................................................................74.1.1 Lead Identification for KYOWA gages...........................................................7

4.2 Setting up Vishay- Computer Interface................................................................84.3 Setting up the software.......................................................................................8

4.3.1 Create a new project...................................................................................84.3.2 Sensor Setup...............................................................................................94.3.3 Material Properties Setup...........................................................................114.3.4 Channel Settings........................................................................................114.3.5 Assign a channel to each sensor................................................................12

4.4 Scan Session Set up...........................................................................................134.4.1 Set up a scan session................................................................................13

4.5 Calibration.........................................................................................................144.5.1 Preparing for scan session.........................................................................14

4.6 Running the Scan Session..................................................................................164.7 Reducing the Data.............................................................................................17

4.7.1 View the reduced data...............................................................................19

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Table of Figures

Figure 1: Strain Gage Interface Card Settings...................................................................7Figure 2: New Project Wizard.............................................................................................8Figure 3: Rectangular Rosette Sensor Window..................................................................9Figure 4: Vishay Gage Properties Data Sheet..................................................................10Figure 5: Channel Settings Window.................................................................................11Figure 6: New Rectangular Rosette Assignment Window................................................12Figure 7: Scan Session Setup Window.............................................................................14Figure 8: Zero Assignments Window...............................................................................15Figure 9: Shunt Calibration Window.................................................................................16Figure 10: Arming Scan Session......................................................................................16Figure 11: Data Reduction Wizard - Step 4......................................................................18Figure 12: Data Reduction Methods.................................................................................18Figure 13: StrainSmart Offline Display.............................................................................19

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1 Document Control

1.1 Responsible Organization

Department name Group RevisionSMTD TDE 1.0CPTD AME 2.0

1.2 Control information

Control Item Name & Job title Revision 1.0 Michelle Seale, TDE Mechanical EngineerRevision 2.0 Ruben Torres, AME BFI Master Trainer and

Process EngineerSecurity Classification Intel Confidential: This document contains

information or material that is confidential and is used for Intel internal use only.

1.3 Approvals

Role Name Approval Date

Owner Michelle Seale and Ruben Torres

Content Review Frank Joyce

1.4 Revision History

Revision Date Description of Change- 06/10/03 Alan McAlister: Vishay Operating Procedure

BKM – Parent Document1.0 09/29/05 First Draft for BFI2.0 04/25/10 Adding new techniques and lasts Strain

Smart software version 4.31.

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2 Purpose and Scope

2.1 Purpose

This document outlines the set up and operation of the Vishay Model 6200 scanner using the StrainSmart 4.31 user interface software for the purpose of strain measurement specific to the Board Flex Initiative.

2.2 Scope

This document is for use only by the BFI Trainers for the purpose of teaching BFI metrology.

2.3 Software and hardware utilized

2.3.1 Vishay Model 6200 Scanner

Model 6010A Strain Gage Card (strain gage sensors)

2.3.2 StrainSmart 4.31

StrainSmart 4.31 software is available by contact Vishay Measurement Group.

2.4 User Guides

The StrainSmart reference guide is located in the software help menu. This guide is also online at www.measurementsgroup.com.

2.5 Definitions

Term Definition¼ - Bridge Wheatstone bridge with 1-active resistor, 2

“dummy” resistors and 1-variable resistor.½ - Bridge Wheatstone bridge with 2-active resistors.

Full - Bridge Wheatstone bridge with 4-active resistors.

Leadwire Resistance Electrical resistance from wires connecting the strain gage to the measurement equipment (source of measurement error).

Temperature Compensation

Matching the Coefficient of Thermal Expansion (CTE) of the gage material with the material being measured over a particular temperature range.

Rectangular Rosette Strain gage sensor with 3 resistor elements oriented at 0, 45, and 90 degrees.

Shunt Calibration Substituting a known resistance in parallel with active resistors to produce a calibration signal.

Stacked Rosette Overlapping strain gage sensors used to measure multiple strains at the same location.

Zero Balance Adjustment of variable resistors so that the instrument will not yield an output.

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3 Overview

3.1 StrainSmart Software

StrainSmart programs can be created online or offline with the capability of saving and copying for future experiments.

3.2 Project Flow

The following is a break down the major steps of using the Vishay in conjunction with the StrainSmart software for acquiring strain data.

HARDWARE SETUP

VISHAY – COMPUTER INTERFACE SETUP

SENSOR SETUP

GAGE MATERIAL PROPERTIES SETTINGS

CHANNEL SETTING

CHANNEL ASSIGNMENT

SCAN SESSION SETUP

DATA AQUISITION

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4 Setting up the Scanner for Strain MeasurementsThe Vishay 6200 supports up to 20 interface cards simultaneously, which correspond to 20 independent, non-multiplexed channels. Without the interface cards the scanner cannot take strain measurements.

4.1 Setting up the Hardware

A ¼ bridge set up is utilized for transient bend measurements. 3 strain gage interface cards (Model 6010A) must be installed for each 3-element rosette.

4.1.1 Lead Identification for KYOWA gages

Colored lead (red, blue, or yellow)- power (Red = 0, Blue = 45 and Yellow = 90) degree

Center lead – signal

Non-colored end lead – Dummy/Remote Sense

Figure 1: Strain Gage Interface Card Settings

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4.2 Setting up Vishay- Computer Interface

The interface connection must be established for data collection.

Open- Control Panel - Network Connections- Local Area Connection- Properties

Under the connection properties, click on Internet Protocol (TCP/IP) and then Properties

Check Use the following IP address Enter the Vishay address in the IP Address with the exception of the last

digit. Enter the last digit as one numerically higher than the ending Vishay IP address digit

o Example: For Vishay address 192.168.0.1, Enter 192.168.0.2 in laptop computer

Enter exact Vishay subnet number in the Subnet Mask field, if it is not already in this field.

4.3 Setting up the software

The following method is recommended to access functions from the StrainSmart user interface screens:

4.3.1 Create a new project

1. Click on New Project to open and select Use the New Project Wizard. See Figure 2.

2. Check that scanner type Model 6200 is listed, click ok.

3. Respond to the yes/no prompt Do you wish to save the project.

4. Enter a Project Name and a brief description of the project if desired in the Comments field and click Next.

Figure 2: New Project Wizard

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4.3.2 Sensor Setup

For each gage used, a sensor must be set up. Once all sensors have been added, they will be listed under the All Sensors tab.

1. Still in the New Project Wizard, add sensors. Click on Retrieve from master Database and search for sensor type. Use the Descriptor next to the sensor type to identify the correct one.

2. If the sensor is not in the master database, click cancel and click on New Sensors.

3. Click the Rectangular icon to open the rectangular rosette sensor window. See Figure 3.

4. In the Descriptor field, enter a sensor name.

Figure 3: Rectangular Rosette Sensor Window

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5. Fill in the Gage Properties. The information is provided in the manufacturer data sheet.

Figure 4: Kyowa Gage Properties Data Sheet

6. Click Apply, and Close. The All Sensors tab will now list the new strain gage sensor.

7. To add the remaining sensors, double click on the gage sensor previously created and click the New icon at the bottom of the pop up window.

8. Edit the Descriptor field to assign a new gage name and click Close.

9. Repeat steps 7-8 until all gages are added to the sensor list.

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4.3.3 Material Properties Setup

StrainSmart assumes material properties to be homogeneous for stress calculations. Follow the steps below and set the material properties to that of the strain gage. NOTE: The strain gage properties are used in lieu of the substrate since this is a relative measurement.

1. Still in the New Project wizard, click Next

2. For the material information, click Retrieve from master database and pick the sensor material type. Material information may be found in the data sheet supplied by the gage manufacturer. NOTE: KYOWA is typically steel and VISHAY is typically aluminum.

3. If material is not in master database, click New Material… from the material information window.

4. Enter all required material properties, click Apply, Close and then Next.

4.3.4 Channel Settings

Channel settings identify which channels will be active during the experiment. The channels to select are the scanner channels that have interface cards installed.

1. In the Channel Information window, select New Channels

2. Holding down the Ctrl key, select all channels being utilized

3. Make sure card type checked is Strain Gage Card and click Ok

4. Double click on the first Unassigned Strain Gage in the Channel Information field.

5. From the Channel Settings window, set the Calibration Mode to match the ARM Shunted value that corresponds to the resistance of the gage being used and click Apply.

6. Click the Blue Arrow to bring up the next Unassigned Strain Gage and repeat step 4.

7. Continue to repeat steps 4 and 5 until all Unassigned Strain Gage channel settings are verifiably correct and click Close.

Figure 5: Channel Settings Window

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4.3.5 Assign a channel to each sensor.

Each rosette element requires an individual channel assignment. Each rosette will have a total of 3 channel assignments each corresponding to one of the three leads.

1. Click Next and then New Channel Assignment in the Assignment Information window.

2. In the Descriptor field of the New Rectangular Rosette Assignment window, type in the user assigned name created in step 4 of section 5.3.2 Sensor Information.

3. In the Sensor field use the pull down to select the rosette.

4. Select the 3 channels associated with that rosette by clicking in each of the Grid 1, Grid 2, and Grid 3 boxes under Channels. NOTE: It is advantageous to be certain that the middle lead on the rosette is assigned to Grid 2 for all rosettes.

5. In the Material field, use the pull down to select the gage material and click OK.

6. Repeat steps 1 through 5 until all gages (rosettes) are named and have three unique channels assigned to each of them.

Figure 6: New Rectangular Rosette Assignment Window

7. Still in the Assignment Information window, click on New User Defined Assignment.

8. Click New.

9. In the user defined Assignment variables window enter a variable name Ex: Gage one- lead one variable would be e1, lead 2 would be e2, and lead 2 would be e3. Gage 2- lead one would be e4, lead 2 would be e5, and lead 3 would be e6.

10. Use the pull down under Assignment descriptor and choose the corresponding sensor named in step 8 of section 5.3.4.

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11. Use the pull down under Reduce As and choose the corresponding Strain (Grid #) assigned to the corresponding sensor in step 8 of section 5.3.4 and click ok.

12. Repeat steps 11 through 14 until all channels of each gage have been assigned variable names.

13. Still in the New User Defined Window, enter the diagonal strain descriptor in the Descriptor field. Ex: Diag1 descriptor would correspond to diagonal strain calculation of rosette 1.

14. In the Statement field, enter the diagonal strain equation using the variables defined in steps 11 through 15. Ex: If Grid 2 assignment corresponds to e2, then e1+e3-e2 should be entered.

15. Use the pull down next to Units and choose Microstrain.

16. Repeat steps 16-18 for each rosette and click Ok. Note: The diagonal strain descriptor will be visible in the Assignment Information window after clicking ok.

17. Click Next and Finish.

4.4 Scan Session Set up

4.4.1 Set up a scan session

The sampling rate will affect the ability to capture maximum strain values when taking strain measurements.

1. Click on the New Scan icon to open the New Scan Wizard.

2. Enter a name for the scan session in the Descriptor field.

3. Change the scan rate to a value between 500 and 1000 for board flex testing and 100-200 when using the calibration fixture or running a test device and click Next. See Figure 8.

4. Do nothing in the Customize digital filters window and click Next.

5. Repeat step 4 for the Recording Data and Normal Recording windows.

6. Click the Finish button in the Summary window.

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Figure 7: Scan Session Setup Window

4.5 Calibration

4.5.1 Preparing for scan session

In order to run the Vishay – StrainSmart interface for data collection, the software must run a shunt and zero calibration.

1. In the lower left hand area of the screen, if the button reads offline or online and the area next to it is red, click on the button until it shows online and the area next to it is green.

2. Click the Zero/Cal icon.

3. Select all channels by descriptor in the Assignment field and click Zero. Refer to Figure 13.

4. If errors are detected check leads for shorts, correct adapter terminal configuration, or that adapter card is plugged into the correct interface card (channel).

5. If no errors are detected, click on the Shunt Calibration tab and click Shunt Calibration icon. See Figure 14.

6. If errors are detected, check the calibration mode by clicking on the Channels tab and double clicking on the first strain gage.

7. Make adjustments and close window.

8. Click back on the All Sensors tab and repeat from step 2.

9. Click Close.

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Figure 8: Zero Assignments Window

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Figure 9: Shunt Calibration Window

4.6 Running the Scan Session

The Vishay- StrainSmart system is now ready to begin data collection.

1. From the Data Acquisition window, select the newly created scan session from the list, and click the Arm icon at the top of the screen.

2. To allow for a graphical view of the measurements as they are taken, set up the online display.

3. In the Arming Scan Session window, click on the Display icon and then New Online Display.

Figure 10: Arming Scan Session

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4. In the New Online Display window choose each assignment individually by name in the Available Assignments in Scan Session window and from the Reduce As window choose Strain(Grid2) or Calculated Values for the user defined assignments- whichever is displayed in that window and click ok.

5. In the StrainSmart Online Display window, choose which display is desired. Typically the strip chart is utilized.

6. The round button will be green when the software is ready to run.

7. Click on Start or the green button and apply loading to the mother board.

8. Click on the Stop button or the red square to stop data collection when loading scenario is complete.

9. At the Do you want to keep the acquired data? prompt, click on Yes to keep the collected data.

10. StrainSmart will prompt to create a duplicate scan session so another test can be run. By clicking Yes, a copy of the scan session will be created and will be ready to Arm for a second set of measurements.

4.7 Reducing the Data

Data reduction uses raw strain measurements to calculate the diagonal strains, principle axis orientation, and max shear strain.

1. Select the completed scan session then click on the Reduce icon. The Data Reduction Wizard window will open to Step 1 of 7 Steps. Proceed through the steps as follows:

Step 1: General Information1. The Descriptor field entry should match the Scan Session

descriptor. 2. Click Next.

Step 2: Exporting Data1. Choose the ASCII Text the Export to window will open.2. Choose where to save the file, assign a file name and click

Save.3. Click Next.

Step 3: Time Domain Analysis-Select Assignments1. Keep default and click Next

Step 4: Time Domain Analysis-Select Scans1. ALL SCANS should be default. See Figure 16.2. Click Next.

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Figure 11: Data Reduction Wizard - Step 4

Step 5: Time Domain Analysis-Data Reduction Methods

1. In Selected Assignments window click on an assignment.2. In the Reduce As window choose Reduce As Check Strain

(Grid 1, 2 and 3). Do not select any other option. The Intel New BFI Toolbox would provide the option for Principal, diagonal etc…

Figure 12: Data Reduction Methods

Step 6: Data Files & Formats 1. Select Customize field names and precision..

Step 7: Summary 1. Leave defaults and click the Reduce icon

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4.7.1 View the reduced data.

When the reduction is complete, a reduced data file will be added to the Reduced Data tab. The reduced data may be viewed by either double clicking on the new file or via Display. The display format is used in the strain report.

1. Click on the Display icon and Reduced Data. A window will pop up with a graphical display of the reduced data.

2. To display the maximum and minimum values click both the Max Value and Min Value icons. The values will appear on the graph. See Figure 18.

Figure 13: StrainSmart Offline Display

3. Save the graphical form of the data.

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