CVT-765 User`s Manual - Vanguard Instruments Company, Inc.
Contents
1. REV 1 CVT 765 USER S MANUAL key to move to the previous character Press the ENTER key when you are done typing the company name d The following screen will be displayed STATION Te TO POSITION ENTER TO ACCEPT Type the station name using the alpha numeric keypad and then press the ENTER key e The following screen will be displayed f CIRCUIT Te TO POSITION ENTER TO ACCEPT Type the circuit information using the alpha numeric keypad and then press the ENTER key The following screen will be displayed MAHLFACTURER Tel TO POSITION ENTER TO ACCEPT Type the manufacturer name using the alpha numeric keypad and then press the ENTER key CVT 765 USER S MANUAL REV1 g The following screen will be displayed MODELS Te TO POSITION EMTER TO ACCEPT Type the transformer s model information using the alpha numeric keypad and then press the ENTER key h The following screen will be displayed SERIAL HUMEER Te TO POSITION ENTER TO ACCEPT Type the transformer s serial number using the alpha numeric keypad and then press the ENTER key The following screen will be displayed EVA RATING Tel TO POSITION ENTER TO ACCEPT Type the transformer s KVA rating using the alpha numeric keypad and then press the ENTER key REV 1 CVT 765 USER S MANUAL j The following screen will be displayed Type the operator s name2. If a USB Flash drive is NOT connected to the unit continue to step e d The following screen will be displayed 1 SAVE INTERNALLY Press the 1 key SAVE INTERNALLY to save the test record to the unit s Flash EEPROM Continue to step e 2 SAVE TO THUMB DRIVE Press the 2 key SAVE TO THUMB DRIVE to save the test record to the connected USB Flash drive The following screen will be displayed Press any key to return to the START UP menu aaa CVT 765 USER S MANUAL REV1 e The following screen will be displayed Press any key to return to the START UP menu REV 1 CVT 765 USER S MANUAL 3 6 3 Restoring a Test Record From Flash EEPROM Use the steps below to restore a test record from the CVT 765 s Flash EEPROM to the working memory a Start from the START UP menu Press the 2 key SETUP b The following screen will be displayed Press the 4 key SAVE RESTORE RECORD c The following screen will be displayed Press the 1 key RESTORE RECORD CVT 765 USER S MANUAL REV1 d The following screen will be displayed RESTORE FECORD L ENTER RECORD HUMBER ep el SILL le sie Se NOTE If you have a USB Flash drive inserted in the CVT 765 s USB MEM port the following screen will be displayed instead of the above screen i IHTERHAL STORAGE 2a THUME DRIVE Press the 1 key INTERNAL STORAGE The following scree
3. s warranty WARNING Do not remove test leads during a test Failure to heed this warning can result in electrical shock to personnel and damage to the equipment Always check the voltage setting of the unit before plugging in to power Failure to heed this warning may damage the device REV 1 CVT 765 USER S MANUAL TABLE OF CONTENTS CONVENTIONS USED IN THIS DOCUMENT erre eee eee eee 1 LO INTRODUCTION cenni ina 2 1 1 General Description and Features sseessssseseserrssrrsrersrrrsrersreesrrrsrersrersereseerseressresreeseeeee 2 L2 Technical Specifica UO Ni 3 Lo OEE ONS AIO RACALE era 4 260 PRETE FO TOP lin 6 2 ODETE VOEE aana T O E NO 6 Dade CAD SCREEN Contrast Controls 6 30 OPERATING PROCEDURES iccndcinncveasiaivsndsdenssdascabonndsicbeudedundcdaseshocadsashoocuasinnec castisencdsinveewadeaes 7 Se CONSCI DIII N e EEEE A E qaneeweeanousestcens 7 32 SEWN Ne Dte ma TINE wince cts roo a 8 3 3 Setting the Interface L angUaf e aJ ai 9 3 4 Setting the Frequency 50 or 60 HZ ei 10 33 RerloMmin2TeS eet n 11 3 5 1 Entering Test Record Header Information 11 3 5 2 Performing a Transformer TESt 15 3 6 Working With Test RecordS ie 20 3 6 1 Viewing the Contents of the Working MEMOry ui 20 3 6 2 Saving Test Results to a Test Record i 21 3 6 3 Restoring a Test Record From Flash EEPROM 24 3
4. 3 Fea Press the ENTER key Continue to step c 2 NO Press the 2 key NO if you do not want to enter the transformer name plate voltage values Continue to step c Ee NN CVT 765 USER S MANUAL REV1 d The following screen will be displayed Press and hold the ARM switch to initiate the test e The following screen will be displayed while the test is being performed Continue to hold down the ARM switch Testing will continue and the test results will be displayed on the LCD screen when testing has finished You can now release the ARM switch The polarity is displayed as either a plus sign for in phase or a minus sign for out of phase The value listed under DIFF is the percentage error Press any key to continue REV 1 CVT 765 USER S MANUAL f The following screen will be displayed KEEF THIS READING we NO Press the 1 key YES to save the reading g The following screen will be displayed TEST SAVED Press any key to continue The above screen will be displayed if there is currently no data in the unit s memory buffer If a test was previously performed or a test record was Note restored from Flash EEPROM or from a Flash drive the following screen will be displayed instead PREVIOUS DATA IH BUF i APPEND PREY DATA Za CLEAR PREY DATA Press the 1 key APPEND PREV DATA to append the data in the unit s working
5. control the CVT 765 via the RS 232C port Using this software the user can retrieve test records from the CVT 765 s memory or a USB Flash drive analyze test results and print test results on a desktop printer Test results are automatically exported to PDF EXCEL and XML formats Operating Voltage The CVT 765 can be operated from 100 120Vac or 220 240Vac The proper voltage can be set using the voltage selection switch on the front panel CVT 765 USER S MANUAL REV1 1 2 Technical Specifications Table 1 CVT 765 Technical Specifications TYPE PHYSICAL SPECIFICATIONS INPUT POWER MEASUREMENT METHOD RATIO MEASURING RANGE TURNS RATIO ACCURACY PHASE ANGLE READING POLARITY TEST VOLTAGE DISPLAY COMPUTER INTERFACE PC SOFTWARE INTERNAL TEST RECORD STORAGE EXTERNAL TEST RECORD STORAGE SAFETY ENVIRONMENT HUMIDITY MAX ALTITUDE MAX CABLES WARRANTY Portable automatic CVT VT PT turns ratio tester Dimensions 19 5 x 12 x 17 D 49 5 cm x 30 5 cm x 43 2 cm Weight 55 Ibs 24 9 Kg 100 120 Vac or 220 240 Vac selectable 50 60 hz ANSI IEEE C57 12 90 75 15 000 5 digit resolution 75 5 000 0 25 5 001 10 000 0 35 10 001 15 000 0 5 0 360 degrees 0 1 degree accuracy In Phase or Out of Phase indication 7440Vac 50ma Back lit LCD 128 x 64 pixels viewable in direct sunlight and low light levels RS 232C Windows XP Vista 7 Transformer Analysis Software included wi
6. using the alpha numeric keypad and then press the ENTER key All header information will be saved and you will be returned to the START UP menu CVT 765 USER S MANUAL REV1 3 5 2 Performing a Transformer Test Follow the steps below to test a transformer a Start from the START UP menu a TEST TRANSFORMER Eesti sie DATE BISelfe11 Press the 1 key TEST TRANSFORMER b The following screen will be displayed TEST HINHDIHG Select the winding by pressing the corresponding numeric key on the keypad c The following screen will be displayed MAME PLATE VOLTAGE Le Wes a HO If you had entered name plate voltages for a previous test the following screen will be displayed instead of the above screen NOTE HAME PLATE VOLTAGE l TES Za HO Za USE FREY DATA Press the 3 key if you would like to use the name plate voltage values from the previous test performed Continue to step c E REV 1 CVT 765 USER S MANUAL 1 YES Press the 1 key YES if you would like to enter the transformer name plate voltage values The following screen will be displayed MAME FLATE VOLTAGE LI ry Type the H winding name plate voltage value using the numeric keypad The screen will be updated as shown below MAME FLATE VOLTAGE Type the X winding name plate voltage value using the numeric keypad The screen will be updated as shown below MAME PLATE VOLTAGE Ca JAA
7. will be displayed REC BRE RESTORED DISPLAY RECORD ES Press the 1 key YES to display the restored test record g The basic information about the restored test record will be displayed as shown below SIMGLE PHASE HUH TESTS dd 1952110 09 2 se REV 1 CVT 765 USER S MANUAL Press the Contrast v key The test record details will be displayed as shown below Press the STOP key to return to the START UP menu The restored test record will remain loaded in the working memory CVT 765 USER S MANUAL REV1 3 6 5 Copying Test Records to a USB Flash Drive Use the steps below to copy one or all test records from the unit s Flash EEPROM to a connected USB Flash drive a Make sure a USB Flash drive is connected to the unit s USB MEM port and then start from the START UP menu s TEST TRANSFORMER TIME 15 16 17 DATE oaelfreil Press the 2 key SETUP b The following screen will be displayed C RECORD ID SET 56766 HZ me NI cee SET T IME 2 SET LANGUAGE PTs OT iei P peh i Press the 4 key SAVE RESTORE RECORD The following screen will be displayed RESTORE a Za SAVE RECORD ia RECORD DIRECTORY ERASE RECORD ae CORY TO THUMB DRIVE Press the 5 key COPY TO THUMB DRIVE REV 1 CVT 765 USER S MANUAL d The following screen will be displayed COPY REC TO THUMB DES l COPY SINGLE RECORD da LUPY ALL RECORD
8. 6 4 Restoring a Test Record From a USB Flash Drive 28 3 6 5 Copying Test Records to a USB Flash DrIVe e 31 3 6 6 Viewing the Test Record DIrectory 34 3 6 7 Erasing Test Records from the Flash EEPROM 36 3 6 8 Erasing Test Records from a USB Flash DFiIVEe 40 LIST OF TABLES Table 1 CVT 765 TEchhIcal SPECICALIONS csciii rie 3 Table 2 Functional Descriptions of CVT 765 Controls and Indicators 5 LIST OF FIGURES Figure 1 CVT 765 Controls and Indicators 4 Figure 2 Typical CVT 765 Cable Connections ii 7 CVT 765 USER S MANUAL REV1 CONVENTIONS USED IN THIS DOCUMENT This document uses the following conventions e Akey switch or knob on the CVT 765 is indicated as KEY SWITCH KNOB e Menunamesare referenced as MENU NAME e CVT 765 LCD screen output is shown as e When instructions are provided the menu item that should be selected is outlined with a rectangle as shown below option 3 should be selected e Warning messages are indicated as e Important notes are indicated as REV 1 CVT 765 USER S MANUAL 1 0 INTRODUCTION 1 1 General Description and Features The Vanguard CVT 765 is a microprocessor based single phase automatic transformer turns ratio tester This portable test unit is specifically designed to measure the turns ratios of Capacitor Volt
9. CVT 765 Capacitor Voltage Transformer Ratio Tester USER S MANUAL Vanguard Instruments Company Inc 1520 S Hellman Ave Ontario California 91761 USA TEL 909 923 9390 May 2011 FAX 909 923 9391 Revision 1 CVT 765 USER S MANUAL REV1 SAFETY SUMMARY FOLLOW EXACT OPERATING PROCEDURES Any deviation from procedures described in this User s Manual may create one or more safety hazards damage the CVT 765 damage the test transformer or cause errors in the test results Vanguard Instruments Company Inc assumes no liability for unsafe or improper use of the CVT 765 SAFETY WARNINGS AND CAUTIONS The CVT 765 shall be used only by trained operators All transformers under test shall be off line and fully isolated Always ground the CVT 765 to a substation ground before connecting the test cables to a transformer Do not perform test procedures or service unless another person is also present who is capable of rendering aid and resuscitation DO NOT MODIFY TEST EQUIPMENT To avoid the risk of introducing additional or unknown hazards do not install substitute parts or perform any unauthorized modification to any CVT 765 test unit To ensure that all designed safety features are maintained it is highly recommended that repairs be performed only by Vanguard Instruments Company factory personnel or by an authorized repair service provider Unauthorized modifications can cause safety hazards and will void the manufacturer
10. L REV1 3 0 OPERATING PROCEDURES The CVT 765 should always be grounded with the provided ground cable before connecting H and X cables The transformer bushings should also be grounded before connecting test leads to the transformer This will prevent inducing any voltages into the CVT 765 All transformer bus connections must be removed and the transformer must be isolated before performing any tests 3 1 Connection Diagram H1 JKL CONTRAST PORS TUV PUSH TO ARM Vanguard Instruments Co Inc Ontario California USA camgasmezine Figure 2 Typical CVT 765 Cable Connections ee REV 1 CVT 765 USER S MANUAL 3 2 Setting the Date and Time To set the date and time a Start from the START UP menu TEST TRANSFORMER TIME 15 16 DATE GS 17 Press the 2 key SETUP b The following screen will be displayed RECORD ID ees See HZ a DISPLAY RECORD SAVE RESTORE RECORD s SET TIME 2 SET LANGUAGE MT N La Leb P peh i Press the 5 key SET TIME c The following screen will be displayed ENTER DATE MP DO Enter the date using the alpha numeric keypad d The following screen will be displayed ENTER TIME HH MH SS Enter the current time using the alpha numeric keypad When the complete time has been entered you will be immediately returned to the START UP menu A a EAS N CVT 765 USER S MANUAL REV1 3 3 Settin
11. S 1 COPY SINGLE RECORD Press the 1 key COPY SINGLE RECORD to copy a single test record from the CVT 765 s Flash EEPROM to the connected USB Flash drive The following screen will be displayed ENTER RECORD HUMBER TO CORY TO FLASH DRY HUMBER Type the record number using the alpha numeric keypad and then press the ENTER key The test record will be copied to the USB Flash drive and the following screen will be displayed REC HHH SAVED TO THUMB DRIVE Press any key to return to the START UP menu 2 COPY ALL RECORDS Press the 2 key COPY ALL RECORDS to copy all test records from the CVT 765 s Flash EEPROM to the connected USB Flash drive All test records will be copied from the unit to the connected USB Flash drive The following screen will be displayed when the process is finished CVT 765 USER S MANUAL REV1 Press any key to return to the START UP menu REV1 CVT 765 USER S MANUAL 3 6 6 Viewing the Test Record Directory Use the steps below to browse through a directory of the test records stored in the CVT 765 s Flash EEPROM memory a Start from the START UP menu Press the 2 key SETUP b The following screen will be displayed Press the 4 key SAVE RESTORE RECORD c The following screen will be displayed Press the 3 key RECORD DIRECTORY CVT 765 USER S MANUAL REV1 d The following screen will be displayed Pre
12. age Transformers CVT s The CVT 765 determines the transformer turns ratio using the IEEE C57 12 90 measuring method It uses a 7500Vac excitation voltage source to accurately measure the turns ratio of Capacitor Voltage Transformers with a rating of up to 765KV The transformer turns ratio is determined by precisely measuring the voltages across the unloaded transformer windings The CVT 765 can measure the turns ratios of Capacitor Voltage Transformers ranging from 75 to 15 000 The measured turns ratio winding polarity and winding phase angle are displayed on the unit s LCD screen A transformer s nameplate voltages can also be entered and the CVT 765 will display the turns ratio percentage error by comparing the test results with the nameplate voltage values This convenient feature eliminates any user calculation errors when testing transformers User Interface The CVT 765 features a back lit LCD screen 128 x 64 pixels that is viewable in bright sunlight and low light conditions A rugged 16 key membrane keypad is used to enter test information and to operate the unit Test Record Storage The CVT 765 can store 128 records of 33 readings internally and up to 999 test records on an external USB Flash drive Test records can be recalled using the included Transformer Analysis PC Software Computer Interface A Windows based XP Vista 7 Transformer Analysis Software is provided with each unit and can be used to remotely
13. g _ g CVT 765 USER S MANUAL REV1 The following screen will be displayed when all test records have been completely erased Press any key to return to the START UP menu REV 1 CVT 765 USER S MANUAL 3 6 8 Erasing Test Records from a USB Flash Drive Follow the steps below to erase test records from a USB Flash drive a Make sure a USB Flash drive is connected to the unit s USB MEM port and then start from the START UP menu ia TEST TRANSFORMER TIME 15 56 DATE a lreil Press the 2 key SETUP b The following screen will be displayed C RECORD ID SET 56766 HZ LIE i SEI A E SET T IME 2 SET LANGUAGE fT LN Lei N Press the 4 key SAVE RESTORE RECORD The following screen will be displayed RESTORE RECORI 2 SAVE RECORD la SRL DRS TOR Ie cory TO THUME DRIVE Press the 4 key ERASE RECORD CVT 765 USER S MANUAL REV1 d The following screen will be displayed l ERASE IMNTERHAL REC da ERASE THUME DEM REC Press the 2 key ERASE THUMB DRV REC e The following screen will be displayed ERASE RECORD L ERASE SIMGLE REC 2a ERASE ALL RECORDS OES PB Sera T 1 ERASE SINGLE REC Press the 1 key ERASE SINGLE REC to erase a single test record from the connected USB Flash drive The following screen will be displayed ERASE THUMB DRIVE REC Type the record number that you would like to era
14. g the Interface Language Follow the steps below to set the interface language English Spanish or Turkish a Start from the START UP menu s TEST TRANSFORMER TIME 15 16 17 DATE oa lreil Press the 2 key SETUP b The following screen will be displayed C IG RECORD ID SET Sepa He s DISPLAY RECORD SPAVE RESTORE RECORD s SET TIME a SET LANGUAGE CP CI i Bo e n i Press the 6 key SET LANGUAGE The following screen will be displayed EHGLISH a TUEKISH ia SPAHISH Select the preferred interface language by pressing the corresponding key on the keypad 1 2 or 3 The interface language will be set and a confirmation screen will be displayed as shown below ENGLISH SET Press any key to return to the START UP menu REV 1 CVT 765 USER S MANUAL 3 4 Setting the Frequency 50 or 60 Hz Follow the steps below to set the preferred frequency a Start from the START UP menu TEST TRANSFORMER TIME 15 16 17 DATE oa lreil Press the 2 key SETUP b The following screen will be displayed 5 RECORD ID a SET orgi Hz s DISPLAY RECORD SPAVE SRESTORE RECORD s SET TIME 2 SET LANGUAGE P pende Ms OTT Ea Le Press the 2 key SET 50 60 HZ c The following screen will be displayed Select the preferred frequency by pressing the corresponding key on the keypad 1 or 2 The frequency will be set and a c
15. he test record details will be displayed as shown below 1 SINGLE PHASE Taga MOLTE RATIO IP 16 Hee Fi Ele Press the STOP key to return to the START UP menu CO e amp I M Ai N CVT 765 USER S MANUAL REV1 3 6 2 Saving Test Results to a Test Record After performing a test the user is presented the option to save the test results to the unit s Flash EEPROM or to a USB Flash Drive If the test results are not saved immediately after performing a test they will still remain in the working memory and can be saved later as long as a new test has not been performed and the unit has not been turned off Follow the steps below to save the test results from the working memory to a test record the following procedure can also be used to re save a restored test record to a new memory location or to a USB Flash Drive a Performa test or restore a test record to the working memory see section 3 6 3 and 3 6 4 and then start from the START UP menu La TEST TEANSFORMER a ea LIE TIHE a eal fey iy DATE BOS lre11 Press the 2 key SETUP b The following screen will be displayed RECORD ID SET Sepa He a neue SET 1 IME SET LANGUAGE Ry OTT bel pg ee Press the 4 key SAVE RESTORE RECORD REV 1 CVT 765 USER S MANUAL c The following screen will be displayed w Press the 2 key SAVE RECORD If a USB Flash drive is connected to the unit continue to step d
16. hown When you have located the test record that you would like to restored press the ENTER key Continue to step 1 2 on page 26 REV 1 CVT 765 USER S MANUAL 3 6 4 Restoring a Test Record From a USB Flash Drive Use the steps below to restore a test record from a USB Flash drive to the CVT 765 s working memory a Make sure the USB Flash drive containing the test record s is inserted in the CVT 765 s USB Flash drive port USB MEM port Then start from the START UP menu TEST TRANSFORMER TIME 15sleslr DATE oa LTfreil Press the 2 key SETUP b The following screen will be displayed RECORD ID SET alee lls HZ s DISPLAY RECORD i SAYE RESTORE RECORD SET TIHE 2 SET LANGUAGE PT CT ie iei P pel i Press the 4 key SAVE RESTORE RECORD c The following screen will be displayed els ele SFERE SAVE RECORD RECORD DIRECTORY ERASE RECORD a LOPY TO THUME DEIVE CH abe Lei RI e Press the 1 key RESTORE RECORD CVT 765 USER S MANUAL REV1 d The following screen will be displayed i IMTEEMAL STORAGE 2a THUME DRIVE Press the 2 key THUMB DRIVE e The following screen will be displayed RESTORE THUME DRIVE REC Type the record number that you would like to restore using the alpha numeric keypad and then press the ENTER key f The test record will be restored to the unit s working memory and the following screen
17. memory to the current test results or press the 2 key CLEAR PREV DATA to clear any previous data from the unit s memory buffer and only save the current test results The following screen will then be displayed TEST SAVED Press any key to continue eee eil CVT 765 USER S MANUAL h The following screen will be displayed Press the 2 key NO i The following screen will be displayed Press the 1 key YES to save the test record to the unit s Flash EEPROM j The following screen will be displayed momentarily The following confirmation screen will then be displayed Press any key to return to the START UP menu EE REV 1 CVT 765 USER S MANUAL 3 6 Working With Test Records 3 6 1 Viewing the Contents of the Working Memory Whenever a test is performed or a test record is retrieved the data is stored in the CVT 765 s working memory You can view the test data using the steps below a Start from the START UP menu TEST TRANSFORMER TIME 1Sslosli DATE oelre11 Press the 2 key SETUP b The following screen will be displayed RECORD ID 2 SET csHe6ed He DISPLAY RECORD SAVE RESTORE RECORD s SET TIME 2 SET LANGUAGE My OTT WLR p ee Gd Press the 3 key DISPLAY RECORD c The basic test record information will be displayed as shown SIMGLE PHASE MUP TESTS 1 dd 1952110 G9 os se d Press the Contrast v key T
18. n will be displayed RESTORE RECORD i ENTER RECORD HUMBER Za SCROLL TO SELECT Continue with the steps below 1 ENTER RECORD NUMBER Press the 1 key ENTER RECORD NUMBER if you know the record number that you would like to restore 1 1 The following screen will be displayed RESTORE RECORD HUMBER Type the record number using the alpha numeric keypad and then press the ENTER key A REV 1 CVT 765 USER S MANUAL 1 2 1 3 The following screen will be displayed RECORD RESTORED DISPLAY RECORD CES 2 HO Press the 1 key YES to display the test record The basic information about the restored test record will be displayed as shown SIMGLE PHASE HUH TESTS 1 dd 152110 69 ite se Press the Contrast v key The test record details will be displayed as shown 1 SINGLE PHASE T44O VOLTE RATIO DIFF 10 BAd a a4 Press the STOP key to return to the START UP menu The restored test record will remain loaded in the working memory 2 SCROLL TO SELECT Press the 2 key SCROLL TO SELECT to scroll through a directory of the stored test records 2 1 The following screen will be displayed RECORDS DIRECTORY eer T SCROLL FHD DHH T SCEOLL EWS CVT 765 USER S MANUAL REV1 Press the Contrast button or the Contrast v key to display the next or previous test record respectively The basic test record information will be displayed as s
19. onfirmation screen will be displayed as shown below Press any key to return to the START UP menu EO aaasNNAN CVT 765 USER S MANUAL REV1 3 5 Performing Tests 3 5 1 Entering Test Record Header Information You can enter the test record header information before performing tests The record header includes identifying information such as the company station circuit manufacturer etc Once the header information has been set it will apply to all subsequent test records To enter the header information a Start from the START UP menu TEST TRANSFORMER UP sese DATE BOS lfe11 Press the 2 key SETUP b The following screen will be displayed a FELURD ID da SET ebi HZ ia DISPLAY RECORD SPAVE RESTORE RECORD ian SET TIME ia SET LANGUAGE Pai ii Ci IE Lei Press the 1 key RECORD ID c The following screen will be displayed COMPAR Te TO POSITION ENTER TO ACCEPT Type the company name using the alpha numeric keypad When pressing a key the corresponding number on the key will be displayed first Pressing the key again will display the first letter on the key Pressing the key again will display the second letter on the key For example to type the letter A you must press the 2 key twice To erase the character at the cursor position press the CLEAR key Press the Contrast key to move to the next character Press the Contrast v EE
20. scriptions of CVT 765 Controls and Indicators Panel Markings GROUND X USB MEM RS 232C VOLTAGE SELECTOR 120 240 Vac 4A 50 60 Hz Fuse 250Vac 5A Fast Blow 7500VAC PRESENT H2 H1 PUSH TO ARM Functional Description Ground stud for connecting to sub station ground X voltage connector USB Flash drive interface port RS 232C computer interface port Back lit LCD screen 128 x 64 pixels viewable in direct light and low light conditions Voltage selection switch Input power connector and fused power switch with third wire safety ground Rugged alpha numeric keypad 7500VAC hazard warning LED This LED will be lit when a test is being performed to remind the user that 7500VAC is present H2 voltage connector H1 voltage connector Spring loaded push button switch Press and hold to initiate a test REV 1 CVT 765 USER S MANUAL 2 0 PRE TEST SETUP 2 1 Operating Voltages The CVT 765 can be operated from 100 120 Vac or 220 240 Vac The proper voltage can be set using the voltage selection switch on the front panel see Figure 1 2 2 LCD Screen Contrast Control To increase the LCD screen contrast press and hold the Contrast 1 key for two seconds Release the button when the desired contrast level has been reached To decrease the LCD screen contrast press and hold the Contrast v key for two seconds Release the button when the desired contrast level has been reached CVT 765 USER S MANUA
21. se using the alpha numeric keypad and then press the ENTER key The test record will be erased from the USB Flash drive and the following screen will be displayed THUME DRIVE REGGG ERASED Press any key to continue You will be returned to the beginning of step e Press the STOP key to return to the START UP menu REV 1 CVT 765 USER S MANUAL 2 ERASE ALL RECORDS Press the 2 key ERASE ALL RECORDS to delete all test records from the connected USB Flash drive The following warning screen will be displayed ERASE ALL THUME DRIVE RECORDS ARE YOU SURE EHTER TO CONHTIHIE Press the STOP key if you do not want to erase all the test records You will be returned to the START UP menu Press the ENTER key to proceed with deleting all the test records from the connected USB Flash drive The following screen will be displayed when all the records have been erased ALL THUMB DRIVE RECORDS ERASED Press any key to return to the START UP menu Vanguard Instruments Company Inc 1520 S Hellman Ave e Ontario CA 91761 e USA Phone 909 923 9390 e Fax 909 923 9391 www vanguard instruments com Copyright 2015 by Vanguard Instruments Company Inc CVT 765 User s Manual e Revision 1 2 e October 22 2015 e TA
22. ss the Contrast or Contrast v key to scroll through the test record directory The test record header will be displayed as shown You can continue to scroll through the record directory by pressing the Contrast and Contrast v keys Press the STOP key to return to the START UP menu REV 1 CVT 765 USER S MANUAL 3 6 7 Erasing Test Records from the Flash EEPROM Follow the steps below to erase test records from the Flash EEPROM a Start from the START UP menu ia TEST TRANSFORMER TIME 15 56 DATE oa lreil Press the 2 key SETUP b The following screen will be displayed C RECORD ID SET 567r Hz LIE are nee SET T IME SET LANGUAGE MTs OT be P peh n n n Press the 4 key SAVE RESTORE RECORD The following screen will be displayed RESTORE eo Za SAVE RECORD ta a ee TORY aie cory TO THUME DRIVE Press the 4 key ERASE RECORD CVT 765 USER S MANUAL REV1 d The following screen will be displayed ERASE RECORD l ERASE SINGLE REC da ERASE ALL RECORDS VER RO Sil NOTE If you have a USB Flash drive inserted in the CVT 765 s USB MEM port the following screen will be displayed instead of the above screen ERAS E THUME DRY REC Press the 1 key ERASE INTERNAL REC The following screen will be displayed ERASE FECORD l ERASE SIHGLE REC da ERASE ALL RECORDS STOP TO EXIT Contin
23. th purchase 128 test records Each record contains 33 readings Up to 999 test records on external USB Flash drive Designed to meet IEC 61010A 1 and CAN CSA C22 2 No 1010 1 92 Standards Operating 10 to 50 C 15 to 122 F Storage 30 C to 70 C 22 to 158 F 90 RH 40 C 104 F non condensing 2000m 6562 ft to fully safety specifications One 50 ft H cable one 15 ft X cable one power cable one safety ground cable One year on parts and labor REV 1 CVT 765 USER S MANUAL 1 3 Controls and Indicators The CVT 765 controls and indicators are shown in Figure 1 A leader line with an index number points to each control and indicator which is cross referenced to a functional description in the corresponding table The purpose of the controls and indicators may seem obvious but users should familiarize themselves with them before using the CVT 765 Accidental misuse of the controls will usually cause no serious harm Users should also familiarize themselves with the safety summary information found on the front page of this User s Manual VOLTAGE SELECTOR _CVT 765 VT Turns Ratio Tester WARNING DO NOT TOUCH OR REMOVE TRANSFORMER TEST CABLES DURING TESTING K V inguard Instruments Cd Inc Ontario California USA Figure 1 CVT 765 Controls and Indicators CVT 765 USER S MANUAL REV1 Item Number hs WwW N 10 11 12 Table 2 Functional De
24. ue with the steps below 1 ERASE SINGLE REC Press the 1 key ERASE SINGLE REC to erase a single test record from the unit s internal Flash EEPROM The following screen will be displayed NOTE E ERASE RECORD HUMBER You can cancel the process and return to the START UP menu by pressing the STOP key REV 1 CVT 765 USER S MANUAL Type the record number that you would like to erase using the alpha numeric keypad and then press the ENTER key If you do not know the test record number you can first view the test record directory using the instructions in section 3 6 6 The following screen will be displayed while the record is being erased ERASING RECORD PLEASE WAIT The following screen will be displayed when the test record has been completely erased RECORD HUMBER ERASED Press any key to continue You will be returned to the beginning of step d ERASE ALL RECORDS Press the 2 key ERASE ALL RECORDS to erase all the test records from the unit s internal Flash EEPROM The following warning screen will be displayed ERASE ALL RECORDS ARE YOU SURE CENTER TO COHTIHUE You can press the STOP key to cancel the process and return to the START UP menu Press the ENTER key to proceed with deleting all the test records from the unit s Flash EEPROM The following screen will be displayed during the erasure process Ee PZ S fZ gt i NI amp
Download Pdf Manuals
Related Search