7700 Manual Version 2.2 - Verimation Technology Inc.
Contents
1. 8 SECTION 4 OPERATION 9 4 1 OVERVIEW eet m rope e dtt ra Eo epa i ens 9 4 2 9 4 3 MENIPATELTBBB C rte Cages 9 4 4 MENU OOP TO INS ast dtum totum dut 9 441 General 9 44 2 CYCLE FUhCllOIs iia eoa eua rude cua rada ipea ES opie 10 4 4 2 CYCLE E nclito ss estne Sestius se ted Seen cc Se ewe 11 443 SETUP BDelO uicissim eia etii abu dett dc atid utu as 11 4431 hoste e 11 44 3 2 LIMIT iret eme ee 11 4 4 3 3 PRECOSCODION dto Reisen 12 BA SA ZERO TJDIOR eene estia 12 4435 SORTIE Docs 12 4 4 8 6 AMP PHASE AMPLITUDE or PHASE Saje a 24 64 cee 12 4 4 3 7 PRINT Option ec oreste oct pepe os 13 4 4 3 8 SCAN or HOLD Option 13 4 4 8 9 13 4 4 4 LIGHT urere eo drea ese ean ce eor 13 4 4 5 BATTERY FUNCOM 13 4 4 6 oou Pasa ch capat orante 14 44 7 STATS FUMCUON a eo Dar2. 23 5 4 STATISTICAL PRINTOUT EXAMPLES continued 24 SECTION 6 SETUP OF THE VERIMET 7700 INSTRUMENT USING THE LEARN MODE 26 6 1 GENERAL torso 26 6 2 Basic Eddy Current reete e e d atc En 26 6 3 Eddy Current Testing Applications 26 6 3 Eddy Current Testing Applications continued 27 6 4 Factors Affecting Eddy Current Response 27 6 5 Transducer Selection and Proper Use 28 6 6 Preparing Parts for Eddy Current Testing 28 6 7 statistical summary 30 6 8 Single Reject Group Sort SETUP Procedure 30 6 8 Single Reject Group Sort SETUP Procedure continued 31 6 9 MULTIPLE Reject GroupS Sort SETUP PROCEDure 32 6 9 MULTIPLE Reject GroupS Sort SETUP PROCEDure continued 34 6 9 MULTIPLE Reject GroupS Sort SETUP PROCEDure continued 36 6 10 Documenting and Storing Accept and Reject Group Masters 36 SECTION 7 MAINTENANCE AND 38 7 1 OVERVIEW t sx trie qd edito tetur dieque redes 38 7 2 PERIODIC MAINTENANCE
3. kr a natin 4 25 FEASIBILITY TESTING Cete oed 25 FUSE DESCRIPTION D 4 HOGA TION to pn eec pen eraot decus p prec ped s vd ess 4 REPLACEMENT bete id aude Maen eee 40 GAINS OFFSETS SGREEN 17 HEAT TREATMENT tetanic e ede a x rne eas 25 INDICATORS 4 INSTRUMENT PANE uta deter eig 2 INTEPRERAGIBG 21 LEARN MENU SCREEN her p a d a a a d Ra E d 14 UMIT SCREEN pe md 11 Verimet 7700 Version 2 2 17 March 1998 44 INDEX VERIMET 7700 INDEX continued MAGNETIC PERMEABILITY 0 ccccc cece ccccccceceeeceeeseeeeeseeueeeeesesueeeeseesueeeeeeeeuaeeeeeeeueees 25 MAIN ME NU tS Se Od 9 2 37 MASTER BA O 5 Mu MINIMI 37 35 MENU IA ICAO Nh ttt tac tct testas tesis toca LE aah 9 PTOI CR RR
4. 9 BATITEERDY tesa aeta ess 13 OGY GSE C 11 DIAGNOSE iit 16 LEARN LM Iu Ae 14 LL cL c gt En a d 13 ounce 11 Aut MM DUM LA AM 14 a 10 SENSORS COIB il sc c c dc e i LA A iu 27 PHOBE d a M A 27 11 METALLURGICAL DIFFERENCES 4 26 MYULTIPLE REJECT GROU G eoe octo o e e 31 NONDESTRUCTIVE 25 PRINTER COMPUTER INTERFACING 21 Ee at repro TEETE 22 28 PROBE ORA 27 2 3 21 41 SAFETY CONSIDERATIONS 5 SETUP MENU SCREEN 2 Rc eR 11 SERIAL OR Tn CE 21 SINGLE REJECT GROUP 25 aad il 29 SORT PROCE URE rir PERDE EE 29 SPARE S ect ect iota oed ten cte este desee edet poses Seb nal Pe SEE owas Aveta 41 STATISTICAL PRINTOUTS EXAMPLES rn te et LL
5. 1 41 SOB TING 25 BATTERY 7 RECHARGING SCREEN tet iti tette efte kit kite 13 M 39 Surtees 21 CASE DER TEL 25 COIL SENSOR Ea M LT fetum 27 COMPUTER PRINTER INTERFACING 21 CONNECTIONS OPTIONAL P E 3 2 CONTROL KEYS ie aeea e 3 COUNTERS SOBEEN 15 Sa onis EL 9 GY GEES GHEE e bn RUE E 11 DIAGNOSTIC MENU SGREEDB rep eddie radere ui in 16 DISPLAY EMEN 2 DRIVERISENSE SETUP SOREEN ina at e t a a o 17 EDDY CURRENTS FAGTORS e M 26 PRINCIPLES 25 HESPONSES sac ou ono A AURI CU UR 26 TESTER eet A ade 25 THEORY 25
6. ST D XBAR RANGE 28 00 7 2 54 na 00 04 00 ao 25 103 05 00 00 00 04 9 3 0 103 05 na 00 01 04 43 13 118 55 na 00 0 2 05 33 23 04 00 01 01 10 45 01 120 04 00 01 01 1 0 56 140 148 01 04 00 03 14 BB 14 184 3 04 00 02 1 2 50 2 6 163 04 n1 0 0 0 2 12 44 04 02 01 06 10 d 34 209 0 2 06 08 VERIMET 7700 Figure 25 Statistical Summary Comparison Sample Printout for Reject Group 2 Verimet 7700 Version 2 2 17 March 1998 33 VERIMET N7700 SETUP 6 9 MULTIPLE REJECT GROUPS SORT SETUP PROCEDURE continued From the printout start with the first reject group tested On the far right of the printout is the S N ratio for all the frequencies used The ratio for both amplitude and phase is printed Record all of the S N values under their corresponding headings on the first tabulation sheet Sheet A Figure 26 Repeat this procedure for all of the remaining reject groups Next average each S N column if all the values in that column are one or greater If all S N values are not one or greater ignore that column An S N ratio of less than 1 indicates that there is an overlap in readings between the accept and reject groups Remember that only one frequency can be selected for the final test Select the column with the best average S N ratio of one or greater If no column has a value of one or greater a single frequency using amplitude or phase cannot sort all the parts However it
7. 136 1 0 0 MAX VALUE 0 0 2 5 RANGE 136 0 2 5 XBAR 68 2 ST DEV 71 0 5 0 REJECT CNT 5 0 TOTAL CNT 10 0 Figure 18 REPORT Output to a Printer e Selecting the PRINT DATA option at the Statistics Menu will print an output similar to the one show in Figure 19 AMPLITUDE PHASE SORT STATUS 135 2 52 1 REJECT 135 2 48 REJECT 135 2 48 REJECT 436 2 48 REJECT 136 2 51 REJECT 0 02 ACCEPT 0 06 ACCEPT 0 00 ACCEPT 0 03 ACCEPT i 0 0 0 04 ACCEPT 1 ae Figure 19 PRINT DATA Output to a Printer Verimet 7700 Version 2 2 17 March 1998 23 VERIMET N7700 INTERFACING 5 4 STATISTICAL PRINTOUT EXAMPLES CONTINUED e Selecting the DOWNLOAD option at the Statistics Menu will output data to computer as shown in Figure 20 This output is essentially the same as the output generated by the PRINT DATA option except that column titles are not sent ACCEPT ACCEPT ACCEPT ACCEPT ACCEPT ACCEPT ACCEPT ACCEPT ACCEPT ACCEPT 1 2 3 4 5 6 7 8 9 oooaooooornm E Figure 20 DOWNLOAD Output to a Computer 24 Verimet 7700 Version 2 1 22 January 1998 INTERFACING VERIMET 7700 This page intentionally left blank Verimet 7700 Version 2 2 17 March 1998 25 VERIMET N7700 SETUP SECTION 6 SETUP OF THE VERIMET 7700 INSTRUMENT USING THE LEARN MODE 6 1 GENERAL This section provides detailed instruction on initial
8. Automatic Gage and Non destructive Test Systems 23883 Industrial Park Dr Farmington Hills Michigan USA VERIMATION TECHNOLOGY INC VERIMET Model 7700 EDDY CURRENT INSTRUMENT OPERATION MANUAL Version 2 2 March 1998 Portable Tester THE CHOICE for QUALITY Ph 800 521 5245 Email info verimation com www verimation com TABLE OF CONTENTS VERIMET 7700 TABLE OF CONTENTS 2 1 14 OVERVIEW 1 1 2 PHYSICAL DESCRIPTION teet 1 12 1 General 1 1 2 2 COMME CHONG oet etta est Eben at oce 2 1 2 2 4 Required Connections 2 1 2 2 2 Optional Connections 3 1 2 3 Controls 3 1 2 4 Display 3 1 2 5 Indicators 4 1 2 6 Fuses 4 1 3 FUNCTIONAL DESCRIPTION esses 4 SECTION 2 SAFETY CONSIDERATIONS 5 SECTION PREPARATION FOR USE 7 3 1 OVERVIEW etes sic oma Ch tte cqui eda cas 7 3 2 INSTRUMENT CONNECTIONS een 7 3 3 BATTERY CHARGING eot he iit e 7 3 3 BATTERY CHARGING
9. LA ELA MA 22 SUMMARY CONTENT cotra stato tao tala tata tatam tatc 29 SUMMARY EXAMPLE 00 000000 00 0 1 28 STATISTICS MENU SGREEN tect ot nett 14 Verimet 7700 Version 2 2 17 March 1998 45 VERIMET N7700 INDEX INDEX continued TEMPERATURE HEAT inci circostante a sau ind b vba 25 TEMBERIING An 25 TEST 65 4000000000000 25 26 TRANSDUCERS 1 Wet ae SUNT OMIM AA MCA LAM OIL CIEL ACE E 27 ies E An AL LA D ALIA AL AED Ln Ed 2 PROBE Niente erate eet is 27 REPLACE ME N 2 40 SEbEUGTIOB a a 27 USE v n MIU I uA iu eA Ud 27 TROUBLESHOOTING adco e oic iori ep 37 VOLTAGE TIO WD Ra t ui NM iA MM ADM 3 40 XBAR RANGE STANDARD MENU 000040 4 0 0 15 Verimet 7700 Version 2 2 17 March 1998 46 INDEX VERIMET 7700 This page intentionall
10. appears With the cursor at CYCLE ON AIR remove the part and depress ENTER The word BUSY appears while the instrument is working When through the ACCEPT PART SETUP message appears Also a HEADER is sent to the printer Press ENTER to continue 6 The COLLECT DATA MODE display appears The instrument is ready to test ACCEPT parts For the instrument to work properly at least three parts from a group must be used Position the part and depress the ENTER key to run a test and store the data in memory After the test the ACCEPT COUNT changes to the number one and data are sent to the printer Position the next part and depress the ENTER key to run the next test Continue until all ACCEPT parts are tested 7 To test REJECT parts depress ESC for the REJECT PART SETUP then depress ENTER Follow the same procedure for the ACCEPT parts Steps 5 and 6 When through depress ESC The instrument calculates results and sends the information to the printer 8 After calculation the message asking to test MORE REJECT GROUPS appears Since there are no more reject groups to be tested press ESC to return to the Main Menu Screen 9 At this point the instrument is ready to test It has automatically selected the best test parameters including values and limits It has used a statistical calculation in determining these parameters Verify the test values on MASTER parts by positioning a good MASTER part selecting CYCLE from the Main Menu Screen and
11. depressing ENTER Note the condition of the STATUS indicator Amber indicates no part green indicates an accept part and red indicates a reject part The type of test PHASE or AMPLITUDE and the value for the part will be displayed Perform the same test with a MASTER REJECT part simply by positioning the part The instrument automatically tests the part and displays the results Note that the cursor is positioned to the right of the value If a reject part is tested a symbol will appear indicating whether the value is greater than or less than the reject limit Verimet 7700 Version 2 2 17 March 1998 31 VERIMET N7700 SETUP 6 9 MULTIPLE REJECT GROUPS SORT SETUP PROCEDURE When setting up the instrument for sorting with two or more reject groups additional steps must be performed The setup of multiple reject groups also requires that a printer be connected to the instrument The printer is used to generate a statistical printout The procedure provided in this section is an extension of the procedure provided in paragraph 6 8 For multiple reject groups setup refer to the following 1 To set up the instrument for a sort of two or more reject groups of parts a printer must be connected to the instrument See Section 5 for printer setup When the printer is connected follow Steps 1 through 7 in Paragraph 6 8 At Step 8 in Paragraph 6 8 continue the setup by depressing ENTER The REJECT PART SETUP message appears again Depr
12. determined by observing the Xbar values and the range above and below these values Start by marking the Xbar value for the accept group Next mark the values for Xbar 3 Std Dev and Xbar 3 Std Dev Use this procedure to mark all of the reject groups If no reject group overlaps the accept group the sort is reasonable If there is some overlapping a judgment can be made as to how good the sort will be Verimet 7700 Version 2 2 17 March 1998 34 SETUP VERIMET 7700 K J LAW Company N7700 MULTIPLE GROUP SORT Date 1 22 4 Job No 924 PartNo _ 22345 _ Instrument S Transducer 5 14125 Sheet A Verimet 7710 SORT CONDITIONS 18 19 Phase NOTES COMMENTS TRANSDUCER SETUP SKETCH Reasi No hea Prose Reject 2 in Reject 3 Ris Y 4 Reject B Reject 5 Group Description Part Figure 26 Multiple Group Sort Sample Sheet A K J LAW A Company _ 5 baw N7700 MULTIPLE GROUP SORT Date 4 22 97 _ ob No _ 87494 Part No 12345 Instrument 5 N 2 Transducer S idi22 amp Sheet B Verimet 7710 Sort Selected Group _ 3 Std Dev Xbar 3 Std Dev Xbar 3 Std Dev Ampl Freq 5 Phase E d a Reject 1 Ampl Ampl Phase _ 2 2 Api Phase v E 15 N
13. ed eres tuae qoid cada cesi 14 4471 DoschplODicsiessscs amico ie eie auam e 14 Verimet 7700 Version 2 2 17 March 1998 i VERIMET N7700 TABLE OF CONTENTS 4 4 7 2 COUNTERS Option ee irte he PED 15 44 7 3 STATISTIC Option ee 15 4 4 7 4 SORT Option 15 44 7 5 REPORT ueri e etre bte pepe 15 44 76 PRINT DATA cei tete 15 447 7 DOWNLOAD Option cit mte ttd 15 4 4 8 DIAGNOSE Function eere nne 16 4481 DescripllOI oe oe e e eb 16 4 4 8 2 MANUAL SETUP Option 16 4 5 Procedure for TransfeRring a 18 4 5 Procedure for TransfeRring a Setup continued 19 4 5 Procedure for TransferRing a Setup continued 20 SECTION 5 COMPUTER AND PRINTER 21 5 1 OVERVIEW ene EE 21 5 2 the tae Rhe renee 21 HyperTerminal Software 21 52 COMPUTER INTERFACING Continued 22 5 3 PRINTER INTEREAGING citt ictor oot to eet rette 22 5 4 STATISTICAL PRINTOUT EXAMPLES
14. match those recorded from the original N7700 To change a limit cursor to the desired limit line press ENTER and then use the up down arrow keys to increase or decrease the limit to the desired number Once the limit is set at the correct value press ESC After all the limits are set to the appropriate values press ESC twice to return to the main menu Cursor to DIAGNOSE and press ENTER to display the diagnostics screen With the cursor on MANUAL SETUP press ENTER again to bring up the manual setup Screen Verify that the sort number and frequency are the correct values then cursor to DRIVER SENSE SETUP and press ENTER Verimet 7700 Version 2 2 17 March 1998 19 VERIMET N7700 OPERATION 4 5 17 18 20 PROCEDURE FOR TRANSFERRING A SETUP CONTINUED Change the driver and sense values to match those recorded from the original N7700 instrument To change the driver or sense value cursor to the desired parameter press ENTER then use the up down arrow keys to increase decrease the reading as necessary Once the correct value is set press ESC Press ESC to return to the manual setup screen then cursor to GAINS OFFSETS and press ENTER Change the values for zero cross amp gain amp offset and phase offset to match those recorded from the original N7700 instrument To change one of these values cursor to the desired parameter press ENTER then use the up down arrow keys to increase decrease the number as necessary On
15. please observe the following guidelines Unplug this product from the wall outlet before cleaning Do not use liquid cleaners or aerosol cleaners Use a damp cloth for cleaning Do not use this product near water This product should be operated from the type of power source indicated on the marking label If you are not sure of the type of power available consult your dealer or local power company This product is equipped with a 3 wire grounding type plug a plug having a third grounding pin This plug will only fit into a grounding type power outlet This is a safety feature If you are unable to insert the plug into the outlet contact your electrician to replace your obsolete outlet Do not defeat the purpose of the grounding type plug If an extension cord is used with this product make sure that the total of the ampere ratings on the products plugged into the extension cord do not exceed the extension cord ampere rating Also make sure that the total ampere rating of all products plugged into the wall outlet does not exceed 15 amperes Except as specifically explained in the User s Manual do not attempt to service this product yourself Opening or removing those covers that are marked Do Not Remove may expose you to dangerous voltage points or other risks Refer all servicing in those compartments to service personnel Unplug this product from the wall outlet and contact service personnel when the power cable is damaged or fr
16. CHARGING continued NOTE Charging the battery takes approximately 4 hours Unless the instrument is in charging mode the battery is trickle charged only When the instrument is in the charging mode and the charging sequence is active the LCD will read CHARGER ON When the battery charging sequence is complete the LCD will read CHARGER DONE ensure optimum battery performance it is recommended that the battery be fully recharged CHARGER DONE each time the recharging procedure is performed Proper battery charging will result in an extended battery life Verimet 7700 Version 2 2 17 March 1998 8 PREPARATION When the battery is fully charged depress the ESC key to return to the main menu OPERATION VERIMET 7700 SECTION 4 OPERATION 4 1 OVERVIEW The Verimet 7700 instrument is a menu driven device that can be set up entirely through the front panel controls This section contains an explanation of all available control panel commands and their corresponding instrument functions Operation of the instrument is covered as follows e Menu Navigation paragraph 4 2 e Menu Path Tree paragraph 4 3 e Menu Options paragraph 4 4 4 2 MENU NAVIGATION To navigate through the menus of the instrument the ESC ENTER and cursor keys are used The cursor a flashing black box on the LCD indicates the active menu option The cursor may be moved using the cursor keys To select an option position the cursor at the appropriat
17. F 4 4 5 BATTERY Function The instrument will warn the operator of a low battery charge condition by turning on the BATT LOW LED Figure 2 Selecting the BATTERY function at the Main Menu Screen displays the Battery Recharging Screen Figure 9 For the internal battery to be recharged the power cable Figure 1 must be connected to the power cable connector at the back panel of the instrument Figure 3 and to an AC power source If AC power is not supplied to the instrument the battery will not recharge To begin charging once the Battery Recharging Screen is displayed press ENTER when the cursor is on CHARGER OFF While the battery is charging the screen will read CHARGER ON When the cycle is complete approximately 4 hours the screen will read CHARGER DONE NOTE The battery charger is active only while the Battery Recharging Screen is displayed Exiting this screen stops the charging CHARGER OFF ENTER ON ESC OFF Figure 9 Battery Recharging Screen Verimet 7700 Version 2 2 17 March 1998 13 VERIMET N7700 OPERATION 4 4 6 LEARN Function Selecting the LEARN function at the Main Menu Screen displays the LCD Learn Menu Screen Figure 10 a warning message appears which notifies the operator that performing a Learn erases the old data for a sort and replaces it with the new data Press ENTER after the warning message to move to the Learn Menu Screen The Learn Menu provides for quick instrument setup For fur
18. Menu sends gathered information about the part type to a printer For further information on computer and printer connections refer to Section 5 4 4 7 7 DOWNLOAD Option Selecting the DOWNLOAD option from the Statistics Menu allows the instrument to send data to a computer For further information on computer and printer connections refer to Section 5 Verimet 7700 Version 2 2 17 March 1998 15 VERIMET N7700 OPERATION 4 4 8 DIAGNOSE Function 4 4 8 1 Description Selecting the DIAGNOSE function at the Main Menu Screen displays the Diagnostic Menu Screen Figure 14 The Diagnostic Menu allows the operator to test the transducer coil and instrument s gains or to download the stored information to a computer and or printer MANUAL SETUP Figure 14 Diagnostic Menu Screen 4 4 8 2 MANUAL SETUP Option Selecting the MANUAL SETUP option from the Diagnostic Menu displays the screen shown in Figure 15 This menu allows the operator to set various parameters described below The MANUAL SETUP menu has the following options e SORT Choosing this option allows the operator to select the sort setup by pressing the ENTER key e FREQ Choosing this option allows the operator to select the desired frequency by pressing the ENTER key e DRIVER SENSE SETUP Choosing this option brings up three more choices Figure 16 DRIVER This option allows the operator to set the coil current drive by using the ENTER key and then the up and d
19. OFFSETS SCAN HOLD ALARM XBAR ZERO CROSS RANGE AMP GAIN AMP HIGH AMP OFFSET AMP LOW PHASE OFFSET PHS HIGH DRIVER PHS LOW ACCEPT SENSE REJECT AUTO ADJUST TOTAL RESET COUNTER Verimet 7700 Version 2 2 17 March 1998 OPERATION VERIMET 7700 4 4 2 CYCLE Function Selecting CYCLE at the Main Menu Screen opens the Cycle Screen shown in Figure 6 The Cycle Screen is used during part sorting and indicates the amplitude and or phase readings pertinent to the material currently being scanned in the cycle mode The STATUS LED Figure 2 used in conjunction with the indicated amplitude phase or amplitude and phase readings is used to sort parts into accept or reject groups according to the threshold preset in the LEARN Function paragraph 4 4 6 The amplitude and phase readings are followed by a less than lt or a greater than gt symbol A less than lt symbol indicates the reading is below the low limit while a greater than gt symbol indicates the reading is above the high limit The operator may use the COUNT option for storing or deleting a count using the ENTER and down cursor keys Only the last stored reading can be cleared using the down cursor key AMPLITUDE PHASE XXX lt XXX gt STORED COUNT X ENTER STORES DWN DEL Figure 6 Cycle Screen 4 4 3 SETUP Function 4 4 8 1 Description Selecting the SETUP function from the Main Menu Screen brings up the Setup Menu Screen Figure 7 The Setup Menu
20. OTES Rejects a Accept Reject 1 Reject 2 Reject 3 Reject 4 Reject5 Reject 6 Figure 27 Multiple Group Sample Sheet B Verimet 7700 Version 2 2 17 March 1998 35 VERIMET N7700 SETUP 6 9 MULTIPLE REJECT GROUPS SORT SETUP PROCEDURE continued 12 To set the instrument for the sort select the LEARN mode and mark only the frequency determined by the tabulation If the sort was all phase or all amplitude select the REJECT GROUP that was the closest to the ACCEPT GROUP Run a test using both of these groups The instrument will automatically adjust all parameters including limits and gain Return to the Main Menu Screen and select CYCLE The instrument is now ready to test all parts If the sort required both amplitude and phase the following must be done a b In the LEARN mode mark the determined frequency Select the REJECT GROUP that was closest to the ACCEPT group under amplitude conditions Run a test and record the limits Use the procedure provided in paragraph 6 8 with the printer attached Select the REJECT GROUP that was closest to the ACCEPT group under phase conditions Run a test using the procedure in paragraph 6 8 The limits for phase are automatically set in the instrument From the Main Menu Screen select SETUP From the Setup Menu Screen select AMP PHASE then
21. allows for ten setups to be saved in the instrument s memory Verimet 7700 Version 2 2 17 March 1998 49 VERIMET N7700 GLOSSARY GLOSSARY continued T Transducer A device that converts energy from one form to another Transducers used with the Verimet 7700 induce and detect eddy current variances thus providing test information to the instrument Verimet 7700 A nondestructive alloy and hardness testing instrument that utilizes eddy current principles for sorting and testing of ferrous materials Verimet 7700 Version 2 2 17 March 1998 50 GLOSSARY VERIMET N7700 This page intentionally left blank Verimet 7700 Version 2 2 17 March 1998 51 VERIMET N7700 TABULATION SHEETS APPENDIX C MULTIPLE REJECT GROUPS SETUP TABULATION SHEETS Verimet 7700 Version 2 2 17 March 1998 52 TABULATION SHEETS VERIMET N7700 This page intentionally left blank Verimet 7700 Version 2 2 17 March 1998 53
22. ayed Unplug this product from the wall outlet and contact service personnel if liquid has been spilled into the product Unplug this product from the wall outlet and contact service personnel if the product has been exposed to rain or water If the product does not operate normally when the operating instructions are followed adjust only those controls that are covered by the operating instructions Improper adjustment of other controls may result in damage to the product This damage may necessitate extensive service work by a qualified technician in order to restore the instrument s normal operating capabilities Verimet 7700 Version 2 2 17 March 1998 5 VERIMET N7700 SAFETY This page intentionally left blank Verimet 7700 Version 2 2 17 March 1998 6 PREPARATION VERIMET 7700 SECTION 3 PREPARATION FOR USE 3 1 OVERVIEW Before operating the Verimet 7700 instrument there are a number of preparatory procedures that must be completed If the instrument has never been operated before then the internal battery must be charged before standard operation Preparation of the instrument is covered as follows e Instrument Connections paragraph 3 2 e Battery Charging paragraph 3 3 3 2 INSTRUMENT CONNECTIONS Before operating the Verimet 7700 a probe or a coil must be connected to the instrument The probe or coil is connected via the transducer cable Connect the transducer cable to the probe or coil and the transducer
23. ce the correct value is shown press ESC Press ESC three times to return to the main menu Cursor to SETUP and press ENTER to bring up the setup menu Cursor to ZERO and press ENTER note that for this step the proper transducer should be connected to the instrument and master accept parts need to be available for zeroing Place a master accept known good part in the transducer Once the instruments display panel shows PART DETECTED press ENTER While zeroing the display panel will show BUSY and once zeroing is finished the display panel will show DONE When zeroing is complete press ESC twice to return to the main menu The new N7700 is now programmed with the new setup Before running the instrument in the standard cycle mode verify that the setup behaves as desired i e confirm that known good parts are accepted and that known bad parts are rejected If the new setup does not accept reject as necessary repeat steps 1 through 19 and ensure that no parameters are mis recorded or left out Verimet 7700 Version 2 2 17 March 1998 20 INTERFACING VERIMET 7700 SECTION 5 COMPUTER AND PRINTER INTERFACING 5 1 OVERVIEW The Verimet 7700 instrument may be connected to a printer or a computer through the RS232 interface connector located on the back panel of the instrument Figure 3 using an RS232 cable Further information on computer and printer interfacing is presented in the following NOTE An RS232 cabl
24. connector on the front panel of the instrument Figure 2 Note that the connector on the probe or the coil is different from the connector on the instrument therefore the cable must be oriented properly NOTE If the instrument will be used for multiple reject groups sorting then a computer or a serial printer must be available and connected to the instrument For more information on computer or printer interfacing refer to paragraphs 5 2 and 5 3 3 3 BATTERY CHARGING When the Verimet 7700 is new from the box the internal batteries are not fully charged Before operating the instrument with the internal batteries they must be recharged To do so refer to the following procedure 1 Plug the power cable to the power cable connector located on the back panel of the instrument For operation other than 110 vac see Section 7 6 before proceeding 2 Plug the power cable into 110 volt AC 60 Hz outlet 220 volt AC 50 Hz outlet for European units 3 Depress the POWER key on the front panel of the instrument to turn on the power Use the down arrow cursor key to move the cursor to the BATTERY option of the menu that appears on the LCD display 5 Depress the ENTER key to select the BATTERY option Depress the ENTER key to begin charging the battery The first line of the LCD display will read CHARGER ON The internal battery is now charging Verimet 7700 Version 2 2 17 March 1998 7 VERIMET N7700 3 3 7 BATTERY
25. contains functions used to prepare and tune instrument operation according to the requirements of the application at hand The Setup Menu options are covered in paragraphs 4 4 3 2 through 4 4 3 9 AMP PHASE PRINT OFF SCAN ALARM OFF Figure 7 Setup Menu Screen 4 4 3 2 LIMIT Option The Limit Screen Figure 8 allows the operator to set up the high and low limits of the amplitude and or phase range to be used during testing Depending on whether amplitude phase or amplitude and phase are used the operator has the choice to set the high and low limits for the amplitude phase or both accordingly The limit entries require numeric values that may be selected using the cursor keys up to increase and down to decrease after moving the cursor to the desired line and pressing ENTER Once the correct value is set the operator must depress the ESC key AMP HIGH LIM XXX AMP LOW LIM XXX PHS HIGH LIM X X PHS LOW LIM X X Figure 8 Limit Screen Verimet 7700 Version 2 2 17 March 1998 11 VERIMET N7700 OPERATION 4433 FREQ Option Selecting the FREQ Frequency option from the Setup Menu changes the frequency used during the test The desired frequency is selected using the ENTER key which scans through the available frequencies The available frequencies are 50 100 200 300 500 1K 2K 3K 5K 10K and 20KHz NOTE Changing the frequency at the FREQ option to a frequency other than the one automatically
26. depth of eddy current penetration required in order to accomplish the sort In general the lower the frequency the deeper the penetration of the eddy currents For most applications sorting for case depth requires frequencies less than 500 Hz When sorting for surface hardness test frequencies between 100 Hz and 10 kHz are used e Transducer The type of transducer used coil or probe depends on the purpose of the inspection and the test location For general inspections such as alloy case depth or surface hardness measurements an encircling coil is used For localized inspections such as soft spot detection a probe is required Verimet 7700 Version 2 2 17 March 1998 27 VERIMET N7700 SETUP 6 5 TRANSDUCER SELECTION AND PROPER USE During eddy current testing it is important for the operator to understand how to use the coil and probe transducers and the factors that affect the accuracy of the acquired reading Since the factors vary between a coil and a probe further explanation is necessary e Coil Transducer A coil transducer Figure 21 is a transducer that encircles the test part The placement of the test part in the coil is important and must be consistent throughout the sort It is preferable to place the test part in the center of the encircling coil Figure 21 illustrates the proper placement of a test part inside a coil The distance A between the part and the inner coil walls is referred to as the fill factor and shou
27. e VERIMET N7700 TROUBLESHOOTING Table 2 Instrument Troubleshooting continued Probable Cause Corrective Action The instrument is not operating properly The instrument is not set up as required A transducer is not connected The transducer cable is not making a good contact Atransducer is damaged or faulty The transducer cable is damaged or faulty NOTE Setthe instrument as required by the application Connect the appropriate transducer as required Check the transducer cable connections Clean if required Replace the transducer Replace the transducer cable If a problem is not covered in troubleshooting Table 2 contact K J Law Engineering Technical Services at 800 521 5245 for assistance 7 4 BATTERY REPLACEMENT In some cases the instrument battery may need to be replaced The following procedure provides step by step instruction to properly replace the instrument s internal battery 1 Unplug all connections to the instrument including the power cable Verimet 7700 Version 2 2 17 March 1998 2 3 4 5 Slide the old battery out of the battery tube 6 Slide the new battery into the battery tube 7 8 9 Replace the housing screws 10 Recharge the new battery before use 40 Flip the instrument upside down and remove the four housing screws Place the instrument on its face and slide the cover up and of
28. e is not included in the instrument package and must be purchased separately Computer Interfacing paragraph 5 2 e Printer Interfacing paragraph 5 3 Statistical Printout Examples paragraph 5 4 5 2 COMPUTER INTERFACING To interface the Verimet 7700 with a computer connect the RS232 cable to the appropriate serial port of the computer and the RS232 connector on the back of the instrument To establish communication between the computer and the instrument communications software using terminal mode is required Example Using the HyperTerminal Communications software found on most computers running on the Windows 9x operating system is given below Regardless of which communications software is used the serial port of the computer should be configured for 8 bits no parity 1 stop bit and a baud rate of 9600 The transmissions between the instrument and the computer are in standard ASCII format and do not require a communications protocol Once the PRINT option in the SETUP menu has been set to ON the instrument is interfaced and ready to communicate with the computer HyperTerminal Software Example NOTE Depending on the setup of the interfaced computer some steps described below may not be required 1 Turn OFF the N7700 and the computer 2 Connect the RS232 port on the back of the instrument to the appropriate RS232 serial port of the computer 3 Turn on both the 7700 and the computer Verimet 7700 V
29. e menu item or function on the LCD and depress the ENTER key Depressing the ESC key will return the operator to the previous menu or cancel a selection The front panel keys are shown in Figure 2 4 3 MENU PATH TREE The menu path tree diagram Figure 4 illustrates the position of all menu options in the instrument s menu structure To determine the path to each menu option use the menu path tree diagram 4 4 MENU OPTIONS 4 4 1 General When the Verimet 7700 instrument is turned on by depressing the POWER key the LCD first displays the software version number screen and then the Main Menu Figure 5 At this point the operator may access the instrument functions by navigating through the provided menus and options The instrument functions are discussed as follows CYCLE Function paragraph 4 4 2 SETUP Function paragraph 4 4 3 LEARN LIGHT Function paragraph 4 4 4 STATS BATTERY Function paragraph 4 4 5 LIGHT OFF DIAGNOSE LEARN Function paragraph 4 4 6 BATTERY STATS Function paragraph 4 4 7 DIAGNOSE Function paragraph 4 4 8 Figure 5 Main Menu Screen Verimet 7700 Version 2 2 17 March 1998 9 VERIMET N7700 OPERATION Figure 4 Menu Tree Diagram MAIN MENU CYCLE LIGHT BATTERY LEARN DIAGNOSE SETUP STATS SORT Tum COUNTERS MANUAL MARK THE SETUP FREQ S STATISTIC FREQ MASTER SORT ZERO SORT 4 SORT SORT REPORT FREQ DRIVER SENSE AMP PHASE PRINT DATA Se PRINT ON OFF DOWNLOAD lt GAINS
30. ersion 2 2 17 March 1998 21 VERIMET N7700 INTERFACING 5 2 5 3 10 COMPUTER INTERFACING Continued Once Windows 95 has completed booting on the computer click on the Start button go to the Programs option then go to the Accessories option then go to the HyperTerminal option and click again Once the HyperTerminal window is displayed double click on the HyperTerminal execution file the one with the exe extension to activate the HyperTerminal communications software The computer screen may display a You need to install a modem before you can make a connection Would you like to do this now Yes No message Click on the No option The Connection Description Window will be displayed on the computer screen Type in a name for 7700 connections such as N7700 inside the ENTER NAME box click on an icon inside the ICON box then click on OK The Phone Number Window will be displayed on the computer screen lgnore the phone number address and country code boxes and select the appropriate communications port in the Connect using box Note that in many cases where the computer has an external mouse hooked up to communication port number 1 COM 1 the N7700 hookup will be to COM 2 The correct COM port will depend upon the individual setup of the computer Click on the OK button at the bottom of the window The COM 1 or COM 2 Properties Window will be displayed on the computer screen Where necessary s
31. ess ENTER and continue testing with the next part group At the end of this group depress ESC If more groups are to be tested depress ENTER twice and continue testing After the last group depress ESC to return to the Main Menu Screen To determine the best sort for all the groups data sent to the printer must be tabulated Printed tabulation sheets are provided in Appendix C Sheets A and B Make copies of these sheets for recording the data as outlined in Steps 3 through 12 Review the statistical summary printout it gives the values for FREQUENCY AMPLITUDE PHASE and part COUNT The printout also records the TYPE of part tested accept or reject Next the STATISTICAL SUMMARY is printed This is followed by the instrument selecting the best sort for the two groups tested This same information is printed for all the REJECT groups tested The information necessary to tabulate comes from the STATISTICAL SUMMARY of each group Figures 24 and 25 illustrate the statistical summary printouts for two sample reject groups The statistical summary printouts for any particular reject group may be identified as Segment C in Figure 23 Next take a look at the tabulation sheet Sheet A Figure 26 It has a heading for basic information followed by all of the frequencies that the instrument is capable of using This is further subdivided into AMPLITUDE and PHASE There is a heading for signal to noise S N and at the left side there is a numbered ro
32. essere 38 7 3 TRHOUBPESHOOTINGL tette 38 7 4 OBALIERYOREPLAGOENMENLT 40 75 FUSE REPLACEMENT et hone eg um ede etu tet 41 7 6 220 VOLT OPERATION asc reete pic hause 41 7 7 TRANSDUCER REPLACEMENT 6 cerent eerta aee 41 Verimet 7700 Version 2 2 17 March 1998 ii TABLE OF CONTENTS VERIMET 7700 42 index 44 a 45 index COMTMUCG 46 ClOSSAly tac AS 48 glossary Continued tert 49 glossary continued N S 50 Appendix C multiple reject groups setup tabulation sheets 52 Verimet 7700 Version 2 2 17 March 1998 iii VERIMET N7700 TABLE OF CONTENTS This page intentionally left blank Verimet 7700 Version 2 2 17 March 1998 iv INTRODUCTION VERIMET 7700 SECTION 1 INTRODUCTION 1 1 OVERVIEW The Verimet 7700 instrument shown in Figure 1 is a nondestructive alloy and hardness testing instrument that utilizes eddy current principles The Verimet 7700 instrument is manufactured by K J Law Engineers Inc and is intended for general purpose sorting and testing of ferrous materials The instrument has bee
33. et the parameters to the appropriate setting Bits per second are 9600 data bits are 8 parity is none stop bits are 1 and flow control is none Click on the OK button when done The computer and instrument are now ready to interface Any data saved or transmitted by the N7700 instrument will be displayed on the HyperTerminal window Once all the desired information has been collected sent to the computer use the Save As option to name the file and save it as a text file with a txt extension PRINTER INTERFACING The Verimet 7700 instrument may be connected to any serial printer having a 128 K buffer that will accept standard ASCII input Connect the instrument to the printer using an RS232 serial cable The serial port of the printer should be configured for 8 bits no parity 1 stop bit and a baud rate of 9600 The printer is ready to print all data sent from the instrument Consult the manufacturer if there are any questions about printers that are compatible with the Verimet 7700 22 Verimet 7700 Version 2 1 22 January 1998 INTERFACING VERIMET 7700 5 4 STATISTICAL PRINTOUT EXAMPLES When connected to a printer or a computer the Verimet 7700 instrument may be used to generate the following Selecting the REPORT option at the Statistics Menu will print an output similar to the one shown in Figure 18 REPORT OF SORT 1 FREQUENCY 3000 AMPLITUDE PHASE HIGH LIMIT 71 4 1 2 LOW LIMIT 67 0 1 3 MIN VALUE
34. f the chassis Unplug the battery connector from the main board connector J9 Connect the new battery cable to the main board at connector J9 Press the battery into the tube against the spring and slide the cover over chassis TROUBLESHOOTING VERIMET 7700 7 5 FUSE REPLACEMENT To replace the fuse refer to the following 1 Ensure that the power cable is disconnected from the instrument 2 With a flathead screwdriver turn the fuse insert 1 4 turn counterclockwise The fuse insert will pop out of the fuse holder 3 Replace the old fuse at the end of the fuse insert Place the fuse insert into the fuse holder 5 Pressthe fuse insert into the fuse holder and turn 1 4 turn clockwise until locked 7 6 220 VOLT OPERATION To operate the instrument at 220 volts perform the following 1 Ensure that the power cable is disconnected from the instrument 2 With a flathead screwdriver turn the VAC switch counterclockwise to the 220V position 3 Replace the fuse with a 0 25 amp slow blow fuse see paragraph 7 5 Connect a 220 volt power cable to the instrument see Section 8 7 7 TRANSDUCER REPLACEMENT In some cases a transducer may require replacement due to damage etc In such cases it is recommended that the following procedure be performed NOTE When replacing a transducer the replacement should be the same type of transducer as the one being replaced Ensure that all transducers are replaced only by those with the ma
35. imate For example soft parts due to over tempering can not be substituted for a sort of soft parts due to no quench Verimet 7700 Version 2 2 17 March 1998 28 SETUP VERIMET 7700 te Ed Figure 23 Statistical Summary Printout Verimet 7700 Version 2 2 17 March 1998 29 VERIMET N7700 SETUP 6 7 STATISTICAL SUMMARY PRINTOUT The sample printout shown in Figure 23 is generated by setting the PRINT option at the Setup Menu Screen to ON A printer must be connected to the instrument The printout is usually several pages in length This type of printout will be required if the instrument is set for a multiple reject groups sort The sample printout as shown in Figure 23 is divided into sections of data as follows e Segment A in a typical summary printout contains the results from the good parts scan at various frequencies Segment B in a typical summary printout contains the results from the parts in a reject group scan at various frequencies Segment C in a typical summary printout contains a comparison of the results from the good parts and a reject group of parts scanned at various frequencies NOTE If more than one reject group of parts was used during the instrument setup the Statistical Summary Printout will contain a Segment B and a Segment C for each reject group 6 8 SINGLE REJECT GROUP SORT SETUP PROCEDURE When setting up the instrument for sorting with a single reject group the statistical printout
36. instrument preparation and setup The instructions in this section must be followed closely to ensure optimum instrument performance Instrument preparation and setup is covered as follows e Basic Eddy Current Theory paragraph 6 2 Typical Eddy Current Testing Applications paragraph 6 3 Factors Affecting Eddy Current Response paragraph 6 4 Transducer Selection and Proper Use paragraph 6 5 Preparing Parts for Eddy Current Testing paragraph 6 6 Statistical Summary Printout paragraph 6 7 Single Reject Group Sort Setup Procedure paragraph 6 8 Multiple Reject Groups Sort Setup Procedure paragraph 6 9 Documenting and Storing Accept and Reject Group Masters paragraph 6 10 6 2 BASIC EDDY CURRENT THEORY Although eddy current testing is the most versatile nondestructive test method it is probably the least understood Simply stated an eddy current is a circular alternating electrical current Factors that affect the magnitude and timing of the eddy current response in a part are the alloy heat treatment history cracks part geometry and temperature By knowing in advance how eddy currents react to variances in these factors they can be monitored to determine the metallurgical status of the part 6 3 TYPICAL EDDY CURRENT TESTING APPLICATIONS Eddy current testing is widely used for alloy sorting heat treatment verification and case depth measurement Table 1 lists the three most common eddy current testing applications and pertinen
37. is not required The setup therefore does not require a printer To set up for a single reject group sort perform the following procedure 1 Depress the POWER button to turn the instrument on The Main Menu Screen appears At this point a printer may be connected to the instrument but it is NOT REQUIRED for this test 2 Move cursor to LEARN use arrows to move cursor and depress ENTER The next menu appears 3 Select a SORT from 1 10 This is done by depressing the ENTER button to increment the SORT 4 no previous sorting information is known about the parts select all the frequencies This is done as follows move the cursor to MARK THE FREQUENCIES and depress the LEFT ARROW The frequency displayed will be marked for testing Depress ENTER to get the next frequency and mark it by depressing the LEFT ARROW Continue until all the frequencies are marked To unmark any frequency depress ENTER until it is displayed then depress the RIGHT ARROW After the desired frequencies are chosen move the cursor to MASTER and depress ENTER or you can select ALL to mark all the frequencies Verimet 7700 Version 2 2 17 March 1998 30 SETUP VERIMET 7700 6 8 SINGLE REJECT GROUP SORT SETUP PROCEDURE continued 5 The displayed message now says to POSITION MASTER and CYCLE ON MASTER Since the cursor is at CYCLE position a good MASTER part and depress ENTER The instrument now cycles through the frequencies until the message DONE
38. ld be kept consistent from part to part in the same sort e Probe Transducer A probe transducer is used mostly for localized testing Proper use of a probe is illustrated in Figure 22 The distance A between the probe face and the part surface is referred to as liftoff The liftoff must be kept consistent from part to part during a sort The distance 2B between the probe and an edge in the part s geometry must also be taken into consideration and generally must be twice the diameter B of the probe Figure 21 Part Placement in a Coil Figure 22 Probe Transducer Transducer Typical Placement Typical 6 6 PREPARING PARTS FOR EDDY CURRENT TESTING Before setting up the instrument a set of master parts must be collected The master parts must be carefully cleaned Any materials that may affect the accuracy of the readings must be removed The master parts must meet the following conditions e All master parts must be of known metallurgical condition e All samples in a group must be of the same process level as the production parts to be tested A minimum of three parts are required in each group for the instrument to calculate a stable average for sorting However it is recommended that a statistical sampling of up to 25 random parts accept and reject be used Lower counts may result in less consistent results e Process errors of the masters must be legit
39. may be possible to sort with one frequency using both amplitude and phase If this is not the case continue with the next step If this is so do the following Carefully observe both the AMPLITUDE and PHASE columns under a given frequency If some parts can be sorted by amplitude and the rest by phase then that frequency can be used with both amplitude and phase providing all the values are one or greater To judge what the possible spread of readings might be within each group of parts a Statistical calculation must be done This is necessary to see that reject group readings do not overlap good group readings A second tabulation sheet Sheet B Figure 27 with a line graph is provided At the left hand side of the sheet record the frequency and type of test that was determined by using the S N ratio From the statistical summaries record the Xbar and the STANDARD DEVIATION for all of the parts Even though the accept data are repeated for each test it is only necessary to record them once In the next column on the sheet 3 Std Dev multiply the standard deviation by 3 for all the groups In the Xbar 3 Std Dev column add the Xbar value to the just calculated 3 Std Dev Finally subtract 3 times the standard deviation from the Xbar and record these values in the column marked Xbar 3 Std Dev To get a visual picture of what the data mean line graphs are used Note that only the zero point is marked Values along the line are
40. metallic buildup will affect the transducer reading capability and generate inaccurate sort results 7 3 TROUBLESHOOTING Table 2 presents general troubleshooting of the instrument The table identifies a problem s and includes probable causes as well as corrective actions to eliminate the problem s at hand Verimet 7700 Version 2 2 17 March 1998 38 TROUBLESHOOTING VERIMET 7700 Table 2 Instrument Troubleshooting Probable Cause Corrective Action Instrument does not turn on when the POWER key is depressed BATT LOW LED is flashing The instrument does not operate when plugged to an AC source The instrument display reads NO PART Verimet 7700 Version 2 2 17 March 1998 1 The battery is not charged 2 The battery is damaged 1 The battery is not charged The fuse is blown 1 A transducer is not connected 2 The transducer cable is not making a good contact 3 A transducer is damaged or faulty 4 The transducer cable is damaged or faulty 39 1 Connect the power cable to the power cable connector and recharge the battery 2 Replace the battery Refer to paragraph 7 4 1 Connect the power cable to the power cable connector and recharge the battery Replace open fuse 1 Connect the appropriate transducer as required 2 Check the transducer cable connections Clean if required 3 Replace the transducer 4 Replace the transducer cabl
41. n thoroughly checked and tested by the Quality Control Department and is warranted to meet or exceed the specifications under which it was manufactured N7700 Instrument Transducer Cable Power cable not shown Figure 1 Verimet 7700 Instrument and Accessories 1 2 PHYSICAL DESCRIPTION 1 2 1 General Physical description of the Verimet 7700 instrument is covered under the following headings Connections paragraph 1 2 2 Controls paragraph 1 2 3 Display paragraph 1 2 4 Indicators paragraph 1 2 5 Fuses paragraph 1 2 6 Verimet 7700 Version 2 2 17 March 1998 1 VERIMET N7700 INTRODUCTION 1 2 2 Connections 1 2 2 1 Required Connections For the Verimet 7700 to operate properly a transducer probe or coil must be connected to it The transducer is connected to the instrument via a transducer cable The transducer cable attaches to the transducer connector on the front panel of the instrument Figure 2 and to the connector on the transducer The instrument is then ready to operate using the internal battery If the instrument is new and has never been used before then the internal battery will need to be charged For further information on battery charging refer to paragraph 3 3 ESC key ENTER key LCD display STATUS LED CURSOR keys Sensor Cable Connector Figure 2 Verimet 7700 Instrument Front Panel Verimet 7700 Version 2 2 17 March 1998 2 INTRODUCTION VERIMET 7700 1 2 2 2 Optional Connection
42. ne instrument to another 1 The following parameters will need to be recorded from the existing setup on the original N7700 instrument for use in creating the same setup on the new instrument Limits Type of Sort Phase Amplitude or Phase amp Amplitude Frequency Sort Number Drive Sense Zero Cross Amp Gain Amp Offset e Phase Offset Steps 2 through 20 describe the necessary actions for gathering and transferring these parameters NOTE Steps 2 through 7 involve gathering information from the existing setup on the original N7700 instrument Only the original N7700 instrument should be used in these steps From the main menu cursor to SETUP and press ENTER to display the setup menu Verify that the sort number fourth line of left hand column is the one desired for transfer If the current sort number is not the one to be copied cursor down to the SORT option and press ENTER until the proper sort number is displayed Record the frequency second line of left hand column the sort number and the type of sort first line of right hand column from the instrument Move the cursor to LIMIT and press the ENTER key to show the limits screen This screen displays the high and low limits for the amplitude and or phase Record these limits Press the ESC key twice to return to the main menu Cursor to DIAGNOSE and press ENTER With the cursor on MANUAL SETUP press ENTER again to display the manual setup screen Verif
43. ng will be displayed Only phase reject limits will be applied NOTE Unless the operator is sufficiently familiar with the principles of eddy current testing selecting a setting other than the setting pre selected by the Learn function Section 6 is not recommended Varying this setting may result in an incorrect reading leading to a poor sort Verimet 7700 Version 2 2 17 March 1998 12 OPERATION VERIMET 7700 4 4 3 7 PRINT Option In selecting PRINT the print option may be toggled ON or OFF For the print option to operate the instrument must be attached to a computer or a printer For further information on computer and printer interfacing refer to Section 5 4 4 3 8 SCAN or HOLD Option The SCAN or HOLD option may be toggled between the following two choices e SCAN The SCAN option sets the instrument to scan continuously and report the data when in cycle mode paragraph 4 4 2 e HOLD The HOLD option sets the instrument to latch data from a single test sample After the data are stored the cycle may be restarted by removing the current part and testing the next one 4 4 3 9 ALARM Option In selecting ALARM the alarm option may be toggled ON or OFF The alarm in the ON position signals an audible alarm when a bad part is scanned The alarm option is active only in the scan mode 4 4 4 LIGHT Function Selecting the LIGHT function from the Main Menu Screen allows the user to toggle the display backlight ON or OF
44. nufacturers same part number Turn off the instrument by depressing the POWER key Disconnect and remove the damaged transducer Connect the new transducer Turn on the instrument by depressing the POWER key At the Main Menu Screen select the SETUP option At the Setup Menu Screen move the cursor to the ZERO option using the cursor keys ses Position the transducer on an accept master for the current sort Depress the ENTER key The LCD will momentarily display BUSY then DONE Transducer replacement is complete Return to the Cycle mode and continue the sort Verimet 7700 Version 2 2 17 March 1998 41 VERIMET N7700 SPARE PARTS SECTION 8 SPARE PARTS This section provides a list of spare parts and optional items that may be required for proper operation of the instrument under certain conditions Contact the manufacturer for further information on the listed items e RS232 cable DB9 to DB25 e Transducer Cable PN 40770E107 0 5 amp slow blow fuse 110 volt operation 0 25 amp slow blow fuse 220 volt operation e 110 volt power cable PN 17506 e 220 volt power cable specify voltage source Internal battery pack PN LWC250183 e Additional probes or coils as needed for testing Verimet 7700 Version 2 2 17 March 1998 42 SPARE PARTS VERIMET 7700 This page intentionally left blank Verimet 7700 Version 2 2 17 March 1998 43 VERIMET N7700 INDEX INDEX AGCESSORIES iuxta
45. own arrow keys to set the value Possible values are from 0 to 255 Press the ESC key when done SENSE This option allows the operator to set the signal return by using the ENTER key and then the up and down arrow keys to set the value Possible values are from 0 to 255 Press the ESC key when done AUTO ADJUST This option allows the operator to automatically set the coil current and the signal return values to the required levels RESET COUNTERS This option allows the operator to reset the statistical counters number of accept and reject parts to zero e GAINS OFFSETS Choosing this option allows the operator to access the instrument s individual parameters as shown in Figure 17 including zero crossover amplitude gain amplitude offset and phase offset These parameters may be changed as desired by using the arrow keys to cursor to the desired parameter pressing ENTER using the arrow keys to increase decrease the values to the new setting and then pressing ESC Verimet 7700 Version 2 2 17 March 1998 16 OPERATION VERIMET 7700 SORT FREQ XX DRIVER SENSE SETUP GAINS OFFSETS Figure 15 Manual Setup Screen AUTO ADJUST RESET COUNTERS ZERO CROSS AMP GAIN AMP OFFSET PHASE OFFSET Figure 17 Gains Offsets Screen Verimet 7700 Version 2 2 17 March 1998 17 VERIMET N7700 OPERATION 4 5 PROCEDURE FOR TRANSFERRING A SETUP The procedure described below is used for copying a setup from o
46. rgical characteristics in order to define the optimum test setup for sorting process errors This test is required for all applications Frequency The number of cycles in a given period of time In eddy current testing it is the number of cycles of alternating current per second M Main Menu A listing of the primary commands used in the operation of the Verimet 7700 Master 1 A part with known eddy current responses used to verify that the instrument is operational 2 A procedure performed to adjust the instrument s internal electronics to a test transducer and an accept part Menu A list of functions and options available to the operator N Nondestructive Testing A verification process that does not alter the test part in any way P Phase The position within the 360 degree cycle of a sinusoidal wave with respect to another wave or a reference point The Verimet 7700 tests changes in the phase phase shift of the eddy current frequency with respect to the frequency of the inducing current Probe Transducer A probe transducer is used mostly for localized testing or testing of hard to reach areas S Serial Port A means of connecting the microprocessor to external devices such as a printer or another computer Serial ports provide for two way communication between the microprocessor and an external device Sort Number A set of preset test parameters that may be recalled for sorting under particular conditions The Verimet 7700
47. s The Verimet 7700 instrument is provided with an RS232 connector that allows the operator to interface the instrument with a computer and or printer It is also provided with a power cord connector that allows for battery recharging or 110 volt AC operation RS232 Connector VAC switch Power cable connector Figure 3 Verimet 7700 Instrument Rear Panel 1 2 3 Controls The Verimet 7700 controls are located on the front panel of the instrument and consist of seven keys POWER key ESC escape key ENTER key and four cursor keys as shown in Figure 2 One exception is the VAC switch that is located in the back panel of the instrument and is shown in Figure 3 The function of each control is as follows e POWER Key The POWER key toggles the instrument power on or off e ESC Key The ESC key is used to cancel a selection or to drop back to the previously selected menu e ENTER Key The ENTER key is used to select an option identified by the cursor e Cursor Keys The cursor keys up down left and right arrows are used to move the cursor when selecting menu options or to increase or decrease values when a numerical input is required e VAC Switch The VAC switch is used to select the line voltage 110 volt AC or 220 volt AC for AC operation of the instrument 1 2 4 Display The Verimet 7700 uses a backlit 20 column 4 line liquid crystal display LCD All menus and options are selected using the LCD and the controls discussed in
48. s for the statistical comparison of gathered data The Statistics Menu options are covered in paragraphs 4 4 7 2 through 4 4 7 7 COUNTERS REPORT STATISTIC PRINT DATA SORT XX DOWNLOAD Figure 11 Statistics Menu Screen Verimet 7700 Version 2 2 17 March 1998 14 OPERATION VERIMET 7700 4 4 7 2 COUNTERS Option Selecting COUNTERS from the Statistics Menu displays the Counters Screen Figure 12 The Counters Screen displays the number of accepted and rejected parts as well as the total number of all scanned parts Selecting reset in the Counters Screen and depressing ENTER will clear all counters PHASE XXX XXX XXX Figure 12 Counters Screen 4473 STATISTIC Option Selecting STATISTIC from the Statistics Menu displays the Xbar Range Standard Menu Screen shown in Figure 13 Figure 13 Xbar Range Standard Menu Screen 4474 SORT st Option Selecting the SORT option from the Statistics Menu advances the number of the sort type for which the statistics are done There are 10 different sort types that may be selected Depressing the ENTER key advances the sort number by 1 until 10 is reached then the count loops back to 01 4 4 7 5 REPORT Option Selecting the REPORT option from the Statistics Menu sends statistical report information to a printer For further information on computer and printer connections refer to Section 5 4 4 7 6 PRINT DATA Option Selecting the PRINT DATA option from the Statistics
49. select LIMIT Adjust the AMPLITUDE limits to the values previously recorded Return to the Main Menu Screen and select CYCLE The instrument is now ready to test all parts 6 10 DOCUMENTING AND STORING ACCEPT AND REJECT GROUP MASTERS After a set of parts has been used as a master that set of parts must be marked and documented for storage It is recommended that the operator also record the values from the Setup Menu Screen It is important for future instrument setup to generate a library of masters in order to provide access to master parts with known metallurgical qualities Verimet 7700 Version 2 2 17 March 1998 36 SETUP VERIMET 7700 This page intentionally left blank Verimet 7700 Version 2 2 17 March 1998 37 VERIMET N7700 TROUBLESHOOTING SECTION 7 MAINTENANCE AND TROUBLESHOOTING 7 1 OVERVIEW This section discusses periodic maintenance and general troubleshooting of the Verimet 7700 instrument as follows e Periodic Maintenance paragraph 7 2 Troubleshooting paragraph 7 3 Battery Replacement paragraph 7 4 Fuse Replacement paragraph 7 5 220 Volt Operation paragraph 7 6 Transducer Replacement paragraph 7 7 7 2 PERIODIC MAINTENANCE Periodically the Verimet 7700 instrument front and back panels the transducer and all connectors must be wiped clean of dirt and dust buildup using a damp cloth The battery should also be recharged regularly to ensure optimum operation NOTE Excessive dirt buildup or
50. set during the Learn sequence may result in an inaccurate sort Manually selecting a scanning frequency requires knowledge of eddy current testing principles 4 4 3 4 ZERO Option Selecting ZERO zeroes the instrument for the part currently being tested This option should also be used to zero the instrument when a probe is replaced Zeroing the instrument compensates for variations in the probe and in the instrument electronics this ensures an accurate reading 4435 SORT ft Option A sort number Sort pertains to a program that contains data for a particular sort setup Selecting SORT changes the number of the sort type for which the instrument is being set up There are 10 different sort program settings that may be stored in the instrument s memory Depressing the ENTER key advances the sort number in increments of 1 until 10 is reached then the count loops back to 01 4 4 3 6 AMPLITUDE or PHASE Option Selecting the AMP PHASE AMPLITUDE or PHASE option top right selection of the Setup Menu allows the user to toggle between the following three available choices AMP PHASE During cycle mode paragraph 4 4 2 both amplitude and phase readings will be displayed Also both amplitude and phase reject limits will be applied e AMPLITUDE During cycle mode only the amplitude reading will be displayed Only amplitude reject limits will be applied e PHASE During cycle mode only the phase readi
51. t data per application Detailed descriptions of those are as follows e Alloy Sorting Commonly used with ferromagnetic materials e Heat Treatment History Factors such as microstructure grain size surface hardness and residual stress influence the electrical conductivity and magnetic permeability of the eddy current response It is possible to monitor heat treatment errors such as no heat treatment missed quench no tempering and over and under tempering using eddy current testing e Case Depth Eddy current testing can be used in sorting parts by measuring case depth Verimet 7700 Version 2 2 17 March 1998 26 SETUP VERIMET 7700 6 3 TYPICAL EDDY CURRENT TESTING APPLICATIONS continued Table 1 Typical Eddy Current Testing Applications APPLICATION EXAMPLE SORTING ABILITY Alloy Steel Alloy Minimum 10 points 1090 vs 1070 carbon difference Case Depth Misplaced Pattern Minimum 0 005 inch case depth difference Deep Case Shallow Case Surface Hardness No Heat Treatment Minimum 5 HRC difference Over Tempering Under Tempering 6 4 FACTORS AFFECTING EDDY CURRENT RESPONSE Eddy current response using the Verimet 7700 is affected by two major factors the frequency and the transducer used The two are discussed as follows e Frequency Inspection frequency for eddy current testing can range from 5 Hz to 10 MHz The Verimet 7700 can scan at frequencies up to 20 kHz The inspection frequency is usually determined by the
52. the previous paragraph Verimet 7700 Version 2 2 17 March 1998 3 VERIMET N7700 INTRODUCTION 1 2 5 Indicators The Verimet 7700 is equipped with two indicator light emitting diodes LED Both LEDs are mounted on the unit front panel as shown in Figure 2 The functions of the two LEDs STATUS and BATT LOW are as follows e STATUS LED A tricolor LED red for bad part yellow for no part and green for good part indicates whether a part is present and whether the part is good or bad e BATT LOW LED This LED turns on when the internal battery is low and requires recharging 1 2 6 Fuses The instrument has a single 0 5 amp slow blow fuse Figure 3 that is used during 110 volt AC operation A single 0 25 amp fuse is used for 220 volt AC operation 1 3 FUNCTIONAL DESCRIPTION The Verimet 7700 instrument uses eddy current principles in order to identify metallurgical differences between accept and reject parts The instrument operates by electromagnetically inducing an eddy current within the test part The magnetic field generated by the induced current is measured to obtain information regarding the electrical and magnetic properties of the test part Measuring those properties provides data used to determine metallurgical properties such as chemistry and heat treatment history Verimet 7700 Version 2 2 17 March 1998 4 SAFETY VERIMET 7700 SECTION 2 SAFETY CONSIDERATIONS Before operating the Verimet 7700 instrument
53. ther information on the Learn Menu options refer to Section 6 The Learn Menu options are as follows SORT XX MARK THE FREQ S XX MASTER MARK 5 UNMARK Figure 10 Learn Menu Screen SORT Selecting the SORT option advances the number of the sort type that the instrument is being set up for There are 10 different sort settings that may be stored Depressing the ENTER key advances the sort number by 1 until 10 is reached then the count loops back to 01 MARK THE FREQ S The left and right cursor keys are used for selecting the frequencies that will be used to scan the parts that are to be sorted The desired frequency is selected using the ENTER key which scans through the available frequencies The available frequencies are 50 100 200 300 500 1K 2K 3K 5K 10K 20KHz and ALL When a desired frequency is displayed depressing the left cursor key marks that frequency for use during the scan To unmark a frequency that has been previously marked use the right cursor key If you select ALL this will mark all the frequencies e MASTER Selecting MASTER at the Learn Menu starts a sequence that walks the operator through a step by step configuration of the instrument for the selected part This option is covered in detail in Section 6 4 4 7 STATS Function 4471 Description Selecting the STATS function at the Main Menu Screen displays the Statistics Menu Screen Figure 11 The Statistics Menu provide
54. w for each reject group There is also a row for averaging the S N columns Verimet 7700 Version 2 2 17 March 1998 32 SETUP 10000 20000 20000 TYPE amp phase amp phase amp phase amp phase amp phase amp phase amp phase amp phase amp phase amp phase amp phase FREQUENCY AMPLITUDE HIGH LIMIT LOW LIMIT PHASE HIGH LIMIT LOW LIMIT 0 6 FREQ TYPE 50 amp 50 phase 100 amp 100 phase 200 200 phase 300 amp 300 phase 500 500 phase 1000 amp 1000 phase 2000 amp 2000 phase 3000 amp 3000 phase 5000 5000 phase 10000 amp 10000 phase 20000 20000 phase FREQUENCY AMPLITUDE HIGH LIMIT LOW LIMIT PHASE HIGH LIMIT LOW LIMIT STATISTICAL SUMMARY 3535 REJECT ST D 12 0 0 27 01 04 4 01 54 04 02 87 02 B 02 10 8 XBAR 114 STATISTICAL SUMMARY RANGE 34 04 03 REJECT ST D 40 oo 46 04 79 01 83 03 2000 0 8 0 5 XBAR 01 82 04 95 0 0 148 03 84 04 63 01 FA 0 2 9 6 0 2 107 02 117 02 210 04 212 07 ACCEPT RANGE Shi ST D 28 00 00 38 na 43 nn 33 00 45 01 56 01 04 50 01 TY n2 72 02 XBAR na na 25 00 30 na 13 72 01 03 01 ACCEPT
55. y left blank Verimet 7700 Version 2 2 17 March 1998 47 VERIMET N7700 GLOSSARY GLOSSARY A American Standard Code for Information Interchange ASCII A system of codes used to represent text information Amplitude The peak to peak measurement of a sinusoidal wave The Verimet 7700 tests peak to peak changes in the eddy current wave when the amplitude testing is active Arrow Keys Keys on the front panel of the instrument move the cursor box around the display Also used to increase or decrease values of certain selections Baud Rate Transmission reception rate at which the serial port communication is conducted The Verimet 7700 uses 9600 baud communication rate C Coil Transducer A transducer used for testing shafts or small parts The coil transducer encircles the part Cursor A box on the LCD that indicates the active menu choice The cursor is used to navigate the instrument menus and select the appropriate options see Arrow Keys E Eddy Current An electromagnetically induced electrical current generated on a conductive piece of material ENTER A key on the instrument front panel used to accept selected menu functions or options ESC A key on the instrument front panel used to return to the previous menu or cancel a selection Verimet 7700 Version 2 2 17 March 1998 48 GLOSSARY VERIMET N7700 GLOSSARY continued F Feasibility Testing Testing performed using a set of test samples of known metallu
56. y that the sort number and frequency match the values recorded in step 3 above Verimet 7700 Version 2 2 17 March 1998 18 OPERATION VERIMET 7700 4 5 PROCEDURE FOR TRANSFERRING A SETUP continued Cursor to DRIVER SENSE SETUP and press ENTER Record the values for DRIVER and SENSE then press ESC to return to the manual setup screen Cursor to GAINS OFFSETS and press ENTER Record the values for zero cross amp gain amp offset and phase offset Press ESC three times to return to the main menu All the parameters needed for transfer to the new instrument are now recorded NOTE Steps 8 through 19 involve transferring information to the new N7700 instrument Only the new N7700 instrument should be used in these steps From the main menu cursor to SETUP and press ENTER to show the setup menu Verify that the sort number fourth line of left hand column is the one which is to be over written with the incoming setup If it is not the correct sort number to be replaced cursor to SORT and press ENTER until the proper sort number is shown Cursor to the type of test AMPLITUDE PHASE or AMP PHASE first line of right hand column and press ENTER until the type of test matches the type recorded off of the original N7700 Cursor to FREQ and press ENTER until the frequency matches the frequency recorded from the original N7700 Cursor to LIMIT and press ENTER to display the limits screen Change the high and low limits to
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