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V

OLTECH 

AT

I 

U

SER 

M

ANUAL

 

P

AGE 

7-77 

 

7.1.18 

 

IR – I

NSULATION 

R

ESISTANCE

 

 

Test Measurement 

Range 

Test 

Voltage 

Test 

 Frequency 

Basic 

 Accuracy 

IR 

1M

Ω

 to 1G

Ω

 

100V to 500V 

DC 

1.0% 

 

 

Transformer windings are often insulated from each other and from the 

core by insulating tape, enamel on the wire or by plastic moulding on the 

bobbin.  

The 'quality' of the insulation can be assessed by applying a DC voltage 

across the insulation and measuring the resistance. The voltage applied 

is usually greater than the voltage that the insulation will see in normal 

use.

 

 

Where Used 

An Insulation Resistance check is recommended as good practice for most 
transformers to check the integrity of the insulation between separate 
windings, or between a windings, or between a winding and a screen. 

 

Test Conditions 

Содержание AT360

Страница 1: ...Kelly Road Suite 306 Fort Myers FL 33908 U S A Tel 239 437 0494 Fax 239 437 3841 sales voltech com Voltech Instruments Ltd 148 6 th Street Harwell International Business Centre Didcot Oxon OX11 ORA U...

Страница 2: ...smitted in any form or by any means electronic mechanical photocopying recording or otherwise without prior written permission of Voltech Instruments Voltech Instruments 2002 2005 All rights reserved...

Страница 3: ...e pr sent manuel d utilisation Dans le doute s adresser au fournisseur GEFAHR VON ELEKTRISCHEM SCHOCK Nur entsprechend ausgebildetes Personal ist berechtigt diese Ausr stung nach dem Lesen und Verst n...

Страница 4: ...uation 1 14 1 8 Overview 1 15 1 9 How Does the ATi Tester Run a Test 1 26 2 Getting Started 2 1 2 1 Introduction 2 5 2 2 Installation 2 10 2 3 Quick Start Tutorial 2 19 2 4 Self Test 2 49 2 5 Producti...

Страница 5: ...ailable from Voltech 5 13 5 5 Kelvin Connections 5 18 6 FRONT PANEL MODES 6 1 6 1 LCR Mode Basic Functions 6 5 6 2 Tests Available in the LCR Modes 6 17 6 3 LCR Menus 6 19 6 4 Compensation 6 29 6 5 LC...

Страница 6: ...AGE VI VOLTECH ATI USER MANUAL 9 1 Warranty 9 5 9 2 Limitation of Warranty 9 5 9 3 Service and Calibration 9 6 9 4 Obtaining Service and Applications Support 9 6 9 5 Firmware Upgrades 9 7 10 INDEX 10...

Страница 7: ...use this Voltech product If you experience any difficulty during installation or use of the ATi or are unsure of any of its features or abilities please do not hesitate to contact either your local s...

Страница 8: ...INTRODUCTION PAGE 1 2 VOLTECH ATI USER MANUAL...

Страница 9: ...e Functions 1 9 1 5 ATI FEATURES SUMMARY 1 11 1 6 TYPICAL PRODUCTION INSTALLATION 1 12 1 7 USING THE ATI FOR DESIGN AND EVALUATION 1 14 1 8 OVERVIEW 1 15 1 8 1 Creating Programs The Editor 1 16 1 8 2...

Страница 10: ...INTRODUCTION PAGE 1 4 VOLTECH ATI USER MANUAL...

Страница 11: ...ion To ensure operator safety all safety information must be read and understood Important information that explains a general principle or refers to other sections of the manual The contents of this...

Страница 12: ...ing insulation resistance testing Although the available energy of the source has been limited in accordance with EN61010 1 and can be considered safe care should be taken to avoid accidental or unexp...

Страница 13: ...multaneously recalling test programs and recording test results Features ATi AT360 20 way switching matrix PC test editor and results server Test fixture system Small signal tests e g inductance capac...

Страница 14: ...with bias LPB Inductance parallel circuit with bias C Interwinding capacitance QL Quality factor D Dissipation factor tan Z Magnitude of complex impedance ZB Complex impedance with bias ANGL Angle of...

Страница 15: ...sistance Rdc Ohms DC resistance using high voltage source IR Ohms AC resistance series circuit R Ohms AC resistance parallel circuit R Ohms Inductance series circuit L Henries H Inductance parallel ci...

Страница 16: ...NTRODUCTION PAGE 1 10 VOLTECH ATI USER MANUAL To determine which options were installed on your tester during manufacture check the list attached to the calibration certificate shipped with your ATi i...

Страница 17: ...f a transformer to another winding Measures across different windings No need to manually change connections Fast execution of a sequence of different tests on multiple windings of a transformer ACCUR...

Страница 18: ...anual or robotic operation Barcode input Run pad or footswitch to initiate operation Simple PASS FAIL operation by an unskilled operator Results Direct printing from the ATi printer port Results archi...

Страница 19: ...r 3 Requires no software programming skills or expertise Test conditions may be entered manually or chosen automatically by measuring a sample transformer Program Archive Management Windows based Serv...

Страница 20: ...D Q Rac X Z Rdc Insulation Resistance Turns Ratio Leakage Inductance Bias current up to 1A Fully programmable 5V 3MHz or AUTOMATIC test conditions 0 05 basic accuracy 4 terminal Kelvin connections usi...

Страница 21: ...of the ATi in a production environment What appears in a test program How programs are created archived and then used in actual test Test fixtures Typical manual and robotic test situations Internal...

Страница 22: ...ows The Test Program Editor supplied with your tester allows you to create such a program without software programming skills Each test required for the program is selected from a list of available te...

Страница 23: ...manage the large numbers of test programs that may be required on a daily basis once they are in production use This is the function of a second PC program supplied with your ATi called the Server Us...

Страница 24: ...y separate PC s are available The standard installation uses separate PC s for the Editor and Server Transferring a new test program from the Editor to the Server archive can be done in any of three w...

Страница 25: ...ransferring a new test program from the Editor to the Server archive can be done in either of two ways Via the tester if the auxiliary port connection is made Directly from the Editor using save as to...

Страница 26: ...PC for test program and results archive Advantages Convenient storage and management of large numbers of test programs e g 1000 Easy storage and management of test results Importing results into other...

Страница 27: ...ed This is to allow the tester uninterrupted access to the Server for the purposes of accessing programs and storing results Usually requires an additional PC which could be a portable to be attached...

Страница 28: ...from the Server to the AT where they will be held in the internal non volatile memory 3 Remove the PC and run all the production test programs from the AT internal memory Advantages Requires only occ...

Страница 29: ...nswer just this question Fixtures are constructed on a standard fixture board which fits into the top surface of the tester The fixture system uses Kelvin connections to give the best possible measure...

Страница 30: ...r swipes a barcode 2 Fits the fixture as prompted 3 Touches pad or presses footswitch Run Stop Fail Busy signals for process control Failed parts for rejection or rework Remote PC records all test dat...

Страница 31: ...ts for connecting into your system Again the tester may be connected to a Server PC or used stand alone as described above Run Stop Fail Busy signals for process control Failed parts for rejection or...

Страница 32: ...ur information only The ATi consists of the following 7 basic functional blocks Relay Switching Matrix The relay switching matrix is used to connect the selected test source and measurement circuits t...

Страница 33: ...s the relay matrix the keyboard and display and the various interfaces 2 A fast digital signal processor that controls the test sources and performs the measurements The test sources relay matrix and...

Страница 34: ...sts the sequence may be more complicated Notes All the relay switching is completed before the test source is energized This will ensure that there can be no arcing and prolong the life of the relays...

Страница 35: ...VOLTECH ATI USER MANUAL PAGE 2 1 2 Getting Started...

Страница 36: ...GETTING STARTED PAGE 2 2 VOLTECH ATI USER MANUAL...

Страница 37: ...3 2 Drawing the Transformer Schematic 2 20 2 3 3 Creating the Test Program 2 22 2 3 4 Running the Program from the Editor 2 30 2 3 5 Server Quick Start 2 33 2 3 6 Running a Program on the Tester 2 36...

Страница 38: ...GETTING STARTED PAGE 2 4 VOLTECH ATI USER MANUAL 2 9 SET UP MODE 2 77 2 9 1 Set up Softkey 2 78 AT Password 2 83 Resetting Tester Set Up Options 2 83 2 9 2 Groups Softkey 2 84...

Страница 39: ...st fixtures is very important Please see the fixturing section of this manual for details of parts that are available from Voltech If you have any questions or are unsure of what to do at any point pl...

Страница 40: ...lvin leads attached 9 pin D 9 pin D F F cable 9 pin D 25 pin D F F cable 25 pin D 25 pin D F F cable CD ROM inside the cover of this manual which contains the Editor and Server installation files and...

Страница 41: ...test results and to provide prompts for data entry within the menu structure RUN Indicator The RUN indicator is a yellow LED This is illuminated when the tester is busy for example when running a tes...

Страница 42: ...at the back of the ATi for use with automatic handling equipment and external indicators Keypad The keypad allows you to enter text data such as the part number i e test program name of the transform...

Страница 43: ...of each side of the ATi Lightly touching the programmable run pads will start the programmed test sequence Footswitch The Run input of the Remote Port on the tester s rear panel can be optionally conn...

Страница 44: ...on using the switch next to the line input at the back of the ATi 0 off You must connect the power lead to a socket with a safety ground contact When the ATi tester is switched on it performs a self t...

Страница 45: ...panel readings See chapter 6 for more information no the LCR front panel mode Set Up is used to group download programs from a Server PC to the permanent store of the tester and to set up the options...

Страница 46: ...upply to the PC Before attempting to install the Editor check that your PC satisfies the following hardware requirements PC processor 486 or better Memory 4MB minimum Hard disk space 2MB minimum Opera...

Страница 47: ...es will be lost The same Editor program is used for all AT Series testers excluding the discontinued AT3500 and AT1000 PC COM Port Configuration When the installation of the Editor has been completed...

Страница 48: ...e used for the Editor depending on your production needs A Server PC needs to be permanently connected to the ATi only if you wish to store test results or use a central program store rather than the...

Страница 49: ...nd that you follow all of the manufacturer s instructions All supporting software must also be installed before attempting to configure the Server application The same server program is used for all A...

Страница 50: ...e recognized by Windows Example of setup for DIGIBOARD XE Server Software Set up When the installation of the Server has been completed you will see the Server icon in the program group Voltech Softwa...

Страница 51: ...an be accessed via the Setup Communications menu To assign a particular AT Series Tester to a COM port 1 Select the communication port to which your tester is connected from the COM PORT selection box...

Страница 52: ...tory Change these settings if you wish to nominate your own program and results storage directories The setting of program path directories may be altered at any time The directory set up dialogue may...

Страница 53: ...pose of this tutorial is to familiarize you with the process of creating a schematic and a test program using the editor Creating a Schematic of a 2 Winding 4 Terminal Sample Transformer This tutorial...

Страница 54: ...vel menu bar and select Add Winding from the menu You will now see a winding with two terminals floating below the mouse pointer 2 Place the winding on the left hand side of the screen and press the l...

Страница 55: ...windings to the test nodes of the tester Place the mouse pointer over terminal A press and hold the right mouse button Continue holding this mouse button down and drag the mouse pointer to test node 9...

Страница 56: ...59 to 73 Resistance of winding CD 59 to 73 Inductance of winding AB 3H Turns ratio AB to CD 1 1 2 It is probable that the actual program used to test such a transformer in production would be the same...

Страница 57: ...rogram 1 From the top level Program menu select Edit The screen will now be made up of three Windows Top left The schematic window showing the two windings Right The available tests window listing all...

Страница 58: ...t of the available terminals 2 Now enter the resistance limits This can be done in four ways Click on this button to enter a nominal value with a percentage tolerance for example 66 with 10 tolerance...

Страница 59: ...rement fixture effects that cannot be compensated for or to compensate the fixture manually so a compensation stage is not required to obtain the correct readings 4 Click on the OK button The test and...

Страница 60: ...double clicking the left mouse button select LS Inductance Series Circuit from the Available Tests window At the dialogue box enter the data required for the inductance test Signal 1V again choose th...

Страница 61: ...enter the data required for the turns ratio test Voltage 1V Frequency 50Hz Integration Leave as the default Medium The AT measures the turns ratio between primary and secondary windings and allows th...

Страница 62: ...GETTING STARTED PAGE 2 28 VOLTECH ATI USER MANUAL Click on the OK button Again the test and its parameters will appear in the Program window...

Страница 63: ...w contain the complete program The scroll bars in this window enable you to view each test in the program in turn to check that it is correct The Editor will not allow a program to be run in the AT un...

Страница 64: ...tor default directory 2 3 4 Running the Program from the Editor The following section describes how to run a test program from the Editor To do this you must first create a program which includes only...

Страница 65: ...ct Tester Download Program The Editor will now download the test program to the tester After a few seconds you should see a message to say that the download was successful If you see a message indicat...

Страница 66: ...ue box containing the results of the test If the transformer had been connected up as in the schematic to nodes 7 8 9 and 10 then the results might be If no transformer is fitted the results will have...

Страница 67: ...Server programs Editor and Server on Separate PC s In many situations the Editor and Server can be installed on separate PC s as shown in the illustration earlier In this situation the AT is used to p...

Страница 68: ...say that the Download was successful If you see a message indicating that the download has failed check your cable COM Port connections and try again If the download continues to fail reboot both PC s...

Страница 69: ...n of the tutorial demonstrates running the program on the AT from the archive on the server Before proceeding to that section if the Server and Editor are using the same COM Port on the single PC re a...

Страница 70: ...ith the interface cable correctly fitted between the tester s server port and the selected Server PC COM port and the COM port is correctly configured in the Server software At this point the tester s...

Страница 71: ...s to ensure that the AT is configured to use the Server as the source for test programs 1 From the top level menu choose Set Up to change to the following display 2 Press the softkey Set Up and at the...

Страница 72: ...UAL 4 If as shown above the origin is INTERNAL then press the softkey Server so that the third line reads as follows 5 Press the softkey EXIT to return to the Set Up display and then press the EXIT so...

Страница 73: ...y 2 The program name can now be chosen from the list of programs available on the PC Server If the list of programs fails to appear after a few seconds check that the AT Server is running the COM port...

Страница 74: ...ad has been successfully completed you will see a message to fit the fixture similar to the following 5 As the fixture is already fitted and compensation is not required with the sample transformer si...

Страница 75: ...e program is running the RUN indicator the yellow LED to the left of the display will be illuminated and the display will indicate the test currently being executed At the end of program execution the...

Страница 76: ...ral times to repeat the program execution On each run of the program the test results should be passed back to the Server where they may be viewed in the On line Monitor window If batch statistics hav...

Страница 77: ...ible from the Run Finish display by pressing the Results softkey see below The results listing screen displays all completed tests giving test number type result in both value and pass or fail and sta...

Страница 78: ...which forms only a very brief introduction to the features available on your ATi Please study and browse through the rest of this manual or the on line help for the Windows software to get the best f...

Страница 79: ...programs can be stored within the tester even when it is switched off Once a program is stored the tester may be used without PC Editor or Server software To operate the tester in this way the origin...

Страница 80: ...press the Run key and continue as before Storing Groups of Programs Inside the ATi Using the PC Server Rather than dealing simply with individual programs the AT Server allows you to create groups of...

Страница 81: ...e Set Up Then at the Set up display press the Groups softkey followed by the List softkey to obtain a list of program groups available for download Select the group to be downloaded to the tester and...

Страница 82: ...e to you locally on the tester Results Analysis You may wish to use another application for further analysis of test results sent back to the Server Close down the Server so that you may have full acc...

Страница 83: ...ll the test signal sources and measuring circuits are working properly and within their calibration limits Once the tester has warmed up for an hour you may run self test at any time by pressing the S...

Страница 84: ...G STARTED PAGE 2 50 VOLTECH ATI USER MANUAL As the self test is running the front panel display will indicate progress using a horizontal bar At the end of the self test you should see the following s...

Страница 85: ...ge shown on the lower two display lines will depend on what caused the failure In the unlikely event that your tester continues to fail please make a careful note of the failure message and error code...

Страница 86: ...e tester and running and the tester has been set up to use the Server as the Program Store or the programs have been downloaded into the tester which has been set up to use its internal memory as the...

Страница 87: ...following options are enabled batch number operator number or serial number the flow diagram shown on the left summarizes production mode operation Select Test Program to Run Fixture Compensation NO...

Страница 88: ...m a list of programs available on the PC Server or in the ATi s own memory i e local programs entered by swiping a barcode or created directly from the front panel by selecting New program and pressin...

Страница 89: ...ram options dialogue see chapter 3 or under program options in front panel program mode see chapter 6 Press Compensate or No Comp as required Note For fixture compensation see later in this chapter Pl...

Страница 90: ...the batch has been tested then press Finish 2 5 2 Error Messages Server Program Store Error Possible Causes Faulty cable The cable from the AT Server port to the Server PC has a broken wire or is not...

Страница 91: ...are and connection to the Server PC are working correctly the following error screen may appear Cause The directory set up in the Server application as the location of test programs does not contain a...

Страница 92: ...ack to the top level display 2 5 3 Indications Displayed While Tests Are Running Where 1 represents the position of the test within the test program The operator may terminate the measurements at any...

Страница 93: ...e LCD indicate the pass or fail result of the previously tested transformer so that the operator may place it in the appropriate Pass or Fail bin Results are also sent to the Server at this time if so...

Страница 94: ...are reset when the test batch number is changed or a new test program is run If the STOP softkey is pressed or the STOP input of the remote port is held low the ATi will immediately stop testing STOP...

Страница 95: ...g chapter of this user manual test programs may be created with any of the following three options enabled or disabled Operator name Batch number Serial number In each case if an option is enabled the...

Страница 96: ...VOLTECH ATI USER MANUAL When running programs with any of the above options enabled there will be additional displays depending on which options are enabled after the Fit the Fixture display and befo...

Страница 97: ...arizes the possibilities Top level Display Select Programs Soft key Select Test Program to Run Fit and Compensate Fixture RUN FINISH Menu New Batch New Operator Re compensate FINISH RUN Enter Operator...

Страница 98: ...GETTING STARTED PAGE 2 64 VOLTECH ATI USER MANUAL Additional displays after entering the part number...

Страница 99: ...r the Enter softkey Cursor softkeys appear in context and may be used with the Delete softkey to correct mistakes Serial Number Entry After the First Transformer When the serial number option is enabl...

Страница 100: ...y characters A is a non numeric character and nnnn is a field of all numeric characters Both xxx and nnnn can be of any length provided that the total serial number is no more than 20 characters When...

Страница 101: ...rely return you to the Enter the serial number display Re inputting the Options When options are enabled the RUN FINISH display allows access to additional softkeys that enable you to change the batch...

Страница 102: ...GETTING STARTED PAGE 2 68 VOLTECH ATI USER MANUAL...

Страница 103: ...y similar to the following will be seen This display shows 1 Part name number 2 Failing test number and test mnemonic 3 Graphical qualification of the failure showing the value measured with respect t...

Страница 104: ...er when the program option Send retry results to server is enabled and printed out when a results printing option is set After pressing the Continue softkey the remaining tests in the program will be...

Страница 105: ...lar to the following The main difference between this and the Stop on fail display is that the reading on the fourth line will be continuously updated allowing adjustments to be made to bring the test...

Страница 106: ...in the program have been completed All transformers are capable of generating voltages much higher than the test voltage When making adjustments take care not to touch any transformer terminals the t...

Страница 107: ...2 At the beginning of each day or work period 3 Whenever a new test program is loaded into the AT for execution Performing compensation on a fixture consists of making TWO measurements Short circuit S...

Страница 108: ...pieces of wire across the relevant pins or all of the pins a spare blank bobbin or complete transformer Transformer Shorting Bobbin for S C compensation Put the short circuit bobbin into the fixture a...

Страница 109: ...ents A typical S C compensation measurement might take 10 seconds or more during which time you will see a progress bar on the display Following one compensation and assuming you have performed S C fi...

Страница 110: ...ry the compensation That for each node that is used the fixture short circuits power and sense together when there is no test piece in place One compensation has been successfully completed the compen...

Страница 111: ...unctions To change the tester s set up options including setting up for Server operation and to download a group of programs from the Server PC to the tester s internal memory To access set up mode fr...

Страница 112: ...point will return the tester to the top level display 2 9 1 Set up Softkey Pressing the softkey Set Up at the Set Up mode display shown above will reveal This display is the start of a list of option...

Страница 113: ...y Response CLICK BEEP Beeper Volume CHANGE Display Contrast CHANGE Display Background LIGHT DARK Clock yyyy mmm dd hh mm Touch Pad Options L AND R L OR R L ONLY R ONLY OFF Pad Response CLICK BEEP OFF...

Страница 114: ...display contrast To change the display background select LIGHT or DARK LIGHT has been chosen as the default setting as this will provide the clearest display across a broad range of contrast settings...

Страница 115: ...replaced by others or modified in any way then the leads should be re calibrated To calibrate the leads press the softkey Change when BNC lead calibration is selected Note that you will need a nomina...

Страница 116: ...rt circuit compensation Next connect the nominal 750 Ohm resistor between node 13 and 15 and press Continue Next the process is repeated using the BNC leads A short circuit compensation on the BNC lea...

Страница 117: ...y brings up the following display Enter the new AT password via the instrument keypad using the Shift softkey to activate letter entry if necessary Press Enter to confirm the new password Resetting Te...

Страница 118: ...ster is set up to use the INTERNAL program store and after you have entered the part name it will search for that name in the programs that are stored in its own non volatile RAM To store these progra...

Страница 119: ...he name of the program group that you wish to use As with other names the group name can now be typed in from the keypad entered using a bar code reader connected to the bar code port of the ATi or se...

Страница 120: ...s internal store and the Server PC may be disconnected These programs will be saved during power off and will only be overwritten by another group download Group Download Error Messages The following...

Страница 121: ...Either the Server PC is not powered on or the Server application is not running b Possible Cause The directory set up in the Server application as the location of test programs does not contain a grou...

Страница 122: ...le program may be stored in the AT using the Editor PC Once a program has been entered using the Editor and downloaded to the tester the tester will display Press Local Save and the program that has b...

Страница 123: ...VOLTECH ATI USER MANUAL PAGE 3 1 3 PROGRAM EDITOR...

Страница 124: ...PROGRAM EDITOR PAGE 3 2 VOLTECH ATI USER MANUAL...

Страница 125: ...3 11 3 2 8 DELETING A CORE CONNECTION 3 11 3 2 9 ADDING A SCREEN CONNECTION 3 12 3 2 10 DELETING A SCREEN CONNECTION 3 12 3 3 CREATING THE TEST PROGRAM 3 13 3 3 1 SETTING THE PROGRAM OPTIONS 3 14 3 3...

Страница 126: ...PROGRAM EDITOR PAGE 3 4 VOLTECH ATI USER MANUAL 3 5 1 FRONT PANEL ERROR CODES 3 43 3 5 2 EDITOR ERROR CODES 3 43 3 6 FIXTURE COMPENSATION SEE ALSO SECTION 2 8 3 46 3 7 PROGRAMMING HINTS AND TIPS 3 48...

Страница 127: ...ing the test parameters to your needs Schematic diagrams of the transformer under test showing pin to node connections These form the basis of your test program Form fill in dialogue boxes to guide yo...

Страница 128: ...the transformer pins has been entered into this schematic you can create test programs without having to refer to the tester s node numbers This section describes how to create a transformer schemati...

Страница 129: ...button to place the winding 3 Name the winding terminals 2 When the winding is placed a dialogue box appears prompting you to name both of the winding s two terminals 4 You may move the cursor focus...

Страница 130: ...change a connection simply use the right button to pick it up and move it to either another test node or to another transformer terminal To delete a connection again use the right mouse button to pic...

Страница 131: ...on the chosen winding A fill in dialogue box will appear Each fill in box will contain the current names of the winding terminals You may change a name by 1 Selecting the appropriate terminal box with...

Страница 132: ...side of the schematic as the winding that requires the additional terminal Upon clicking the left mouse button a form fill in dialogue box will appear on the screen with prompts to insert the termina...

Страница 133: ...terminal that are present Note that ALL tests containing the deleted terminals will also be DELETED 3 2 7 ADDING A CORE CONNECTION To add a core connection Choose Add Core Connection from the Schemat...

Страница 134: ...ic You may now add a screen to node connection 3 2 10 DELETING A SCREEN CONNECTION To delete a screen connection 1 Select the connection you wish to delete by pointing at it with the 8 ouse prompt and...

Страница 135: ...ating the test program with the AT Series Editor By the end of this section you will be able to Set up the program options Add a test to the program Insert a test in the program Modify an existing tes...

Страница 136: ...OPTIONS Overview After you have created the program schematic and before starting to insert any tests in the program you should set up which program options you would like to use From the top level me...

Страница 137: ...erator will be prompted to enter a batch number which will be attached to the test results Serial Numbering During program execution the operator will be prompted to enter a serial number for each tra...

Страница 138: ...ne limit will cause a warning to be displayed on the Server For further details see the AT Server section of this manual AQL No of Parts This is the number of failures in the batch at which a warning...

Страница 139: ...urce This option is applicable to the AT3600 only When you have selected all the required options click on the OK button to return to the Top Level menu Stop on Fail With this function enabled the tes...

Страница 140: ...transformer at the earliest opportunity then press the ABORT softkey to terminate this program run and return to the RUN FINISH display from where you can start the program again for the next transfor...

Страница 141: ...ion process and yield Notes 1 The third line showing the graphical comparison of the measured value and user programmable limits has a logarithmic scale The measured value may be represented by either...

Страница 142: ...on Schematic then Edit in the top level menu Bottom Left The Program Window This is the list of tests that currently make up the test program Normally for a new program this window would initially be...

Страница 143: ...a test use the mouse to select the test you require from the Available Tests list and double click on that test with the left button This will open the dialogue box particular to that test You simply...

Страница 144: ...s procedure for modifying an existing program if you needed to append further tests at the end However if you wish to add an extra test somewhere in the middle of an existing program a different proce...

Страница 145: ...ar select Program Insert Test In this example a Turns Ratio test will be inserted before the Inductance test 3 in the Program You will now see the dialogue box for the test you wish to insert 4 Enter...

Страница 146: ...ome tests need to be modified a typical example being that you need to change the test limits With the Editor software modifying a test is very simple 1 In the Program list window double click with th...

Страница 147: ...e left mouse button to highlight the test you wish to delete NOTE Take care to correctly select the test to be deleted as the Editor software will permanently delete the test 2 From the top level menu...

Страница 148: ...the normal case The LS Winding Inductance series circuit test is more typical requiring the test parameters Signal and Frequency to be specified For many tests including the LS test you may enter the...

Страница 149: ...rmined by the tester will be entered as a current Note that not all tests allow the test parameters to be chosen by the tester The programming details for each test in section 7 Tests and Test Conditi...

Страница 150: ...PROGRAM EDITOR PAGE 3 28 VOLTECH ATI USER MANUAL The corresponding dialogue boxes are as follows limits Minimum and maximum limits...

Страница 151: ...PROGRAM EDITOR VOLTECH ATI USER MANUAL PAGE 3 29 Minimum limit only Maximum limit only...

Страница 152: ...ation between windings has no upper limit to its resistance To choose which type of limit you wish to use simply use the mouse to click on one of the buttons or After you have entered the limits in on...

Страница 153: ...on to select the test conditions The programming details for each test in section 7 Tests and Test Conditions specify which tests allow the Measure button to enter the test parameter values 3 4 1 HARD...

Страница 154: ...tially select the LS test in the normal way by double clicking with the mouse in the Available Tests list In the LS test dialogue box Enter the terminal names in the normal way Select the integration...

Страница 155: ...one where compensation can be applied you will then see the following message Disable Compensation will stop this dialogue being displayed for subsequent presses of the Measure button for this program...

Страница 156: ...on In this case the LS test requires both short circuit and open circuit compensation The following dialogue box will be shown first Fit the required short circuit header and click on OK The Editor wi...

Страница 157: ...ER MANUAL PAGE 3 35 Remember to remove the short circuit header before performing short circuit compensation You may still select No on either of the above dialogues to perform just one type of fixtur...

Страница 158: ...K button the tester will be commanded to make its measurements and you will see the following message When the measurements have finished the display will return to the dialogue box for the LS test wi...

Страница 159: ...1 at the specified frequency and you have specified a 5V test signal then the AT would have to supply 5V 0 1 50 Amps You will then see a warning similar to this Check first that the winding is properl...

Страница 160: ...a value only for parameters that you have not specified In general all tests have restrictions on which test parameters may be or have to be specified and which may be chosen automatically In the cas...

Страница 161: ...rd Before you attempt to run the program 2 Make sure you have connected your tester s Auxiliary Port on the rear panel to a suitable COM port on your PC This may be COM2 if your mouse is already using...

Страница 162: ...hed you will see a dialogue box containing the results of the test From the results you should be able to see any tests where there may be problems Return to the Program Editor to make the necessary c...

Страница 163: ...The resulting dialogue see below allows the AT password to be set If a password is set this password will need to be entered into the AT whenever a test program is changed or deleted Note that this E...

Страница 164: ...has gone wrong Each error code translates into an effect a short description of the fault such as a current or voltage overload that can help the operator diagnose the cause of the problem The DSP st...

Страница 165: ...e following display will show the two status error codes the first four digits being the DSP status error code and the second single or two digit number in parentheses being the reason for DSP status...

Страница 166: ...n to the core of the transformer The following table gives the error codes that can appear when using the run facility in the Editor or when viewing on line results with the Server These error codes c...

Страница 167: ...t tests only test current exceeded pre programmed limit AT3600 only x2xx Voltage present Vpres did not go away in time something on the fixture is staying charged AT3600 only 4xx The test has failed d...

Страница 168: ...d earlier in this chapter so that the tester is connected and the program is downloaded Then from the top level menu bar select Tester Compensate Fixture Most programs will contain at least one test w...

Страница 169: ...rogram will be stored inside the tester Any subsequent measurements started as described above by clicking on Tester Run Program will return compensated results to the Editor If you are not sure wheth...

Страница 170: ...then some tests may be inadvertently deleted Examples where this may happen are deleting a winding or a terminal and renaming a terminal 2 Use the recommended order for the tests in the program The a...

Страница 171: ...re testing the turns ratio between windings where the actual number of turns on one of the windings is only 10 specify limits of 5 which is equivalent to half a turn 4 Make use of the Measure button F...

Страница 172: ...PROGRAM EDITOR PAGE 3 50 VOLTECH ATI USER MANUAL...

Страница 173: ...VOLTECH ATI USER MANUAL PAGE 4 1 4 AT SERIES SERVER...

Страница 174: ...AT SERIES SERVER PAGE 4 2 VOLTECH ATI USER MANUAL...

Страница 175: ...10 4 3 TEST RESULTS HANDLING 4 11 4 3 1 Receiving Test Results 4 11 4 3 2 Result Display and Analysis 4 13 4 3 3 Simple On line Monitoring 4 13 4 3 4 Batch Statistics On line Analysis 4 14 4 3 5 On li...

Страница 176: ...AT SERIES SERVER PAGE 4 4 VOLTECH ATI USER MANUAL...

Страница 177: ...lled up from the Server sent to and then executed within the tester The features of the Server include MS Windows application style dialogues and tools Storage of all previously created test programs...

Страница 178: ...ith a single tester and two PCs Before program requests or uploads may be completed the tester must be configured for Server mode See chapter 2 You may copy program files directly into the program dir...

Страница 179: ...ram you will need to know its part name Select FILE PART and then OPEN from the menu bar You may select the part to open from the list displayed or change the path and drive to search for other parts...

Страница 180: ...ll now be saved with the new part name as specified IMPORTANT When using the SAVE AS function you must be aware that it is not a RENAME function The previous copy of the test program with the original...

Страница 181: ...he part to be deleted and press the DELETE button You will then be prompted to enter the password as defined when installing the Server software to allow the part to be deleted The program will then b...

Страница 182: ...ost after power down The following dialogue is used to configure groups and may be located under the Setup menu in the Server Double clicking on any part in the left hand list will add it to the right...

Страница 183: ...r tester results as well as acting as the central Server All results sent by one tester s channel during one day are collected together and formed into one large file This file is known as the batch r...

Страница 184: ...imum Maximum R 1 10 44 20 Pass 59 73 6 776850E 01 Pass 3 3 223899E 00 P 2 10 44 23 Pass 59 73 6 776832E 01 Pass 3 3 110549E 00 P 3 10 44 24 Pass 59 73 6 776363E 01 Pass 3 3 125640E 00 P 4 10 44 26 Pas...

Страница 185: ...T Series Tester connection is opened using the Setup Communication menu an accompanying result monitoring window will be created One result monitoring window will be present for each open channel When...

Страница 186: ...to save results to a database For this feature to operate a licence for use must first be obtained from your Voltech supplier All results formats can be saved simultaneously Basic statistics displays...

Страница 187: ...the AQL Acceptable Quality Level of the transformer The number of re tries that have been attempted the percentage of failures so far and the number of transformers that failed out of the last 10 test...

Страница 188: ...ich a warning will be displayed on the Server Note that this AQL is only applied after sufficient parts have been tested to make the percentage meaningful When setting AQL of Parts to be 1 for example...

Страница 189: ...ded by specialist software packages such as those available for SPC Statistical Process Control One example of this is to monitor in real time the trend in a winding resistance to identify a defective...

Страница 190: ...ngs the name of a provider the name and location of the database and a valid database user name and password if required You may need to consult with the database or network administrator to obtain th...

Страница 191: ...hat will provide the connection to the type of database that you are using Several different types of provider are installed along with the Server software others may be available if you have a databa...

Страница 192: ...ssible to connect to ODBC compliant databases including Microsoft Access using the Microsoft OLE DB Provider for ODBC Drivers Click on Next when you have chosen the correct provider Select the databas...

Страница 193: ...ERIES SERVER VOLTECH ATI USER MANUAL PAGE 4 21 When you click on Test Connection you should see something similar to Next click on OK of the Test connection succeeded dialogue and select the Advanced...

Страница 194: ...AT SERIES SERVER PAGE 4 22 VOLTECH ATI USER MANUAL Check that the Access permissions for the database are as required Share Deny None is the default and is usually the most suitable setting...

Страница 195: ...d and adjusted if necessary Click on OK to complete the setting of the data link properties A typical AT Server advanced database results dialogue would be Click on OK to return to the results dialogu...

Страница 196: ...not already exist and stores data within the tables using the structure defined here The tables store all the information that is available concerning the results including time date limits operator...

Страница 197: ...future development Result Number Single Actual test result TestStatus Text 5 DSP Status for test PassFail Text 5 PASS FAIL Individual test pass or fail result Table tblVoltechRunID Field Format Notes...

Страница 198: ...inLimit Number Single Minimum limit for test see MaxLimit Number Single Maximum limit for test see Notes CheckType NONE If there are no Min or Max limits MinLimit 0 and MaxLimit 0 CheckType MIN If the...

Страница 199: ...third party analysis software to the same database for live on line or offline data analysis The example reports presented here were created using PQ Systems ChartRunner but many other charting and a...

Страница 200: ...AT SERIES SERVER PAGE 4 28 VOLTECH ATI USER MANUAL Resistance Distribution Analysis Overall Pass Fail Analysis...

Страница 201: ...ion The chart will show the trend of inductance measurements over time an Individuals chart type See the ChartRunner help system for how to set up control limits change the display appearance or set u...

Страница 202: ...on line analysis and the chart type Click on the Data Source tab to choose the results database Under the Data Definition tab Select the table of the database that holds the data that you want to char...

Страница 203: ...osen and the column Result flagged as a measurement To do this click on the Treat as column of the Result row and select Measurement from the drop down list Next click on Filtering and filter the data...

Страница 204: ...MANUAL Next click on the Limits tab and enter appropriate specification limits that will appear on the chart The ChartRunner software can automatically select appropriate control limits from the data...

Страница 205: ...including chart titles and size can be altered by selecting the Titles and Misc tabs Click on OK when finished Double click on the chart definition to display the chart Please refer to the help system...

Страница 206: ...com or any of their regional offices United States PQ Systems Inc Corporate Headquarters Toll free 1 800 777 3020 Phone 937 885 2255 E mail sales pqsystems com Europe PQ Systems Europe Ltd Phone 44 1...

Страница 207: ...t programs OLE is the analysis and control method preferred by users who wish to operate the AT under software control OLE is already configured ready to go within the Server application Your client a...

Страница 208: ...strings as GetVariant Result Only function specific responses and return values are shown NewDataAvailable LPCSTR ComPort Returns TRUE or FALSE Boolean 1 or 0 as variant depending on whether new data...

Страница 209: ...id AT serial number found GetTransformerSerialNo LPCSTR ComPort This call returns the transformer serial number on success or a failure string NO SERIAL NO no valid transformer serial number found Get...

Страница 210: ...nation of the maximum value for TestNumber in other functions GetMinLimit LPCSTR ComPort short TestNumber Float value giving the minimum limit for the test TestNumber NO LIMIT This test has no minimum...

Страница 211: ...successful Compensation all OK Fixture Compensation fail ExtraString Compensation has failed GetUnitType LPCSTR ComPort Returns AT3600 AT1600 or ATi depending on the type of instrument connected to t...

Страница 212: ...d when command is first sent to server and every subsequent time it is sent until loading finishes LOADED The program has been successfully loaded this will continue to be returned and the program wil...

Страница 213: ...ts to Server is set to On Transfer the program to the directory being used by the server for storing programs Ensure that the server program is running and that the COM Port to be used has been enable...

Страница 214: ...Dim objServerResult As Object Dim vntResult 1 To 99 As Variant Set objServerResult CreateObject Server Results nTest 3 nNumRuns 3 sComPort COM2 Dummy read to clear any previous result vntResult nTest...

Страница 215: ...OK button When you have pressed the RUN softkey and the first result has been read the message box will disappear and you will then see the first result entered into cell F3 of the spreadsheet Contin...

Страница 216: ...n error message The line Set objServerResult CreateObject Server Results creates the server Results automation object within Visual Basic When trying to read the result with Do vntResult nTest objServ...

Страница 217: ...sing the NewDataAvailable function also means that checking for INVALID RESULT NUMBER and NO RESULT return values is no longer necessary 4 3 9 OFF LINE ANALYSIS If you have no requirement for real tim...

Страница 218: ...spreadsheet used in the example is Microsoft Excel 97 From the Excel top level menu bar select File Open Excel will then bring up the Open File dialogue box Select the results file you wish to view a...

Страница 219: ...AT SERIES SERVER VOLTECH ATI USER MANUAL PAGE 4 47 Ensure that the De limited option is checked and click on Next to move to step two...

Страница 220: ...TECH ATI USER MANUAL In the Delimiters section of this screen ensure that only the Comma option is checked Click on Next and proceed to step three Check that the Column Data Format option is checked a...

Страница 221: ...of decimal places Using functions built into the spreadsheet the data obtained may now be used to create graphs and bar charts for a visual representation of your results As an example to produce a gr...

Страница 222: ...the program storage CSV results storage or OLE features of the Server software The software must be registered however before you can use the database and basic batch statistics features The software...

Страница 223: ...tallation Contact your Voltech supplier with the exact ID Code and you will be issued with a Key Code provided that the appropriate payment has been received A 30 day trial key code may be supplied FR...

Страница 224: ...stination PC Take the ID code displayed in the new installation and enter it into the Transfer ID Code section of the dialogue of the licensed software as above on the old installation Take the Transf...

Страница 225: ...VOLTECH ATI USER MANUAL PAGE 5 1 5 FIXTURES...

Страница 226: ...FIXTURES PAGE 5 2 VOLTECH ATI USER MANUAL...

Страница 227: ...FIXTURE SYSTEM SPECIFICATION 5 12 5 4 FIXTURE PARTS AVAILABLE FROM VOLTECH 5 13 5 4 1 Fixture Plate Voltech Part Number 91 184 5 15 5 4 2 Custom Fixture Kit Voltech Part Number 91 185 5 16 5 4 3 Sock...

Страница 228: ...FIXTURES PAGE 5 4 VOLTECH ATI USER MANUAL...

Страница 229: ...es are based on a fixture board containing connector pins They provide the interface to the tester via the tester node pins allowing transformers to be quickly inserted and removed in a reliable manne...

Страница 230: ...rts to help you The following basic building blocks are available A Fixture Plate Designed for mounting existing fixtures to an AT Series Tester Comprises Base plate including contacts with cover Test...

Страница 231: ...ockets are wired to the 40 contacts which align with the tester s 40 nodes This complete fixture may be used for convenient wiring to existing fixtures or as a means of connecting flying leads and cli...

Страница 232: ...ease the fitting and wiring of larger test sockets and posts for flying leads 2 Cover Plate This mounting plate allows convenient attachment of various sockets and connectors Please note that this pla...

Страница 233: ...suitable probes parts with surface mounting pin blade or flying lead connections can be connected The fixture system is supplied as detailed in the comprehensive user guide to fixture construction The...

Страница 234: ...adjustable in height and in spring pressure Voltech Part No 91 187 4 Guides 12 adjustable guides are supplied to locate the test piece in the fixture quickly and accurately 5 Drilling Tools 5 differen...

Страница 235: ...pairs of red and black 4mm shrouded safety sockets mounted and wired into a blank fixture A variety of clips and posts can be used to enable connection to the component under test When testing larger...

Страница 236: ...s Surface mount Pin connection Blade connection Flying leads Pitches of 1 27mm 2 00mm 2 50mm 2 54mm 0 1 3 81mm 0 15 There are some application limitations to the above for example the minimum pitch of...

Страница 237: ...nents parts and kits are available from your Voltech supplier to help you assemble your own fixtures MORE INFORMATION A comprehensive guide to the construction of your own custom fixtures is supplied...

Страница 238: ...FIXTURES PAGE 5 14 VOLTECH ATI USER MANUAL Example probe box drilled for multiple RM bobbin types M Series Kelvin Fixture...

Страница 239: ...IXTURE PLATE VOLTECH PART NUMBER 91 184 Designed for mounting existing fixtures to an AT series tester the fixture plate comprises Item 1 Base plate including contact pins with cover Item 2 Test piece...

Страница 240: ...over Item 2 Test piece interface plate Item 3 Probe housing box Item 4 Bezel Item 5 Guides 12 off Fixings for above 5 4 3 SOCKET FIXTURE VOLTECH PART NUMBER 91 186 A fixture board fitted with 40 4mm s...

Страница 241: ...black leads terminated in 4mm plugs The connection lead set consists of 10 Spring loaded connection posts 10 Kelvin crocodile clips 10 Non Kelvin crocodile clips 10 Fine non Kelvin clips 5 4 5 CLAMP V...

Страница 242: ...within its 1 tolerance at dc In a standard 2 terminal measurement there are TWO sources of error The resistance of the connecting leads The resistance of the contact between the connection and the le...

Страница 243: ...out of tolerance when it is really exactly 1 000 Notice also that the voltage applied to the resistor is NOT exactly 100mV because of the voltage drops across RL and RC In a Kelvin or 4 terminal conne...

Страница 244: ...1 000 The correct result In general a true Kelvin connection provides the most accurate means of sensing the voltage across any impedance AC or DC and hence helps to produce an accurate measurement o...

Страница 245: ...mponent under test In such cases separate power and sense leads are used up to the base of the terminal and the length of common lead from the junction of the power and sense leads through the termina...

Страница 246: ...ollowing diagram indicates how to identify the node terminal function POWER terminals are all on the outside of the fixture area SENSE terminals are all on the inside of the fixture area The BNC to cl...

Страница 247: ...CH ATI USER MANUAL PAGE 5 23 When Kelvin connections are not possible because of space limitations use a semi Kelvin connection Below are two examples of Kelvin connections Clips supplied with BNC lea...

Страница 248: ...FIXTURES PAGE 5 24 VOLTECH ATI USER MANUAL...

Страница 249: ...VOLTECH ATI USER MANUAL PAGE 6 1 6 FRONT PANEL MODES...

Страница 250: ...FRONT PANEL MODES PAGE 6 2 VOLTECH ATI USER MANUAL...

Страница 251: ...LE IN THE LCR MODES 6 17 6 3 LCR MENUS 6 19 6 3 1 LCR BNC Menu 6 19 6 3 2 LCR FIX Menu 6 20 6 3 3 LCR Mode Settings 6 21 6 4 COMPENSATION 6 29 6 4 1 Performing Compensation 6 31 6 4 2 Compensation Fai...

Страница 252: ...FRONT PANEL MODES PAGE 6 4 VOLTECH ATI USER MANUAL...

Страница 253: ...ate 4 terminal measurements Quick and easy connection eliminates contact resistance errors Intuitive softkey control sets up measurements in a few key presses Ready to test in a few seconds Ideal for...

Страница 254: ...ingle winding or component LCR FIX mode uses nodes 13 14 15 and 16 of the fixture bay to perform LCR type measurements plus Turns Ratio Leakage Inductance and Interwinding Capacitance on two windings...

Страница 255: ...mH The second measurement is that of the parameter selected by the 3rd softkey In this case Q the quality factor is 1 4427 The next line shows the LCR mode that you are using This may be either BNC mo...

Страница 256: ...equency because the ATi always attempts to trim its output voltage across the part to be equal to the desired or program voltage see below If the impedance of the part is very low the ATi might not be...

Страница 257: ...nsure these nodes 18 and 20 are clear before using the BNC terminals The top softkey number 1 allows you to move through the visible options Press softkey 1 and you will see Lp and Q The options for t...

Страница 258: ...DES PAGE 6 10 VOLTECH ATI USER MANUAL Lp and D More tests are available by pressing More 1 3 softkey 2 Z and Please see the sections following LCR FIX for details of how to use the front panel LCR mod...

Страница 259: ...begins to make measurements Ensure that DC Bias current is switched off before connecting and disconnecting component under test The ATi is making measurements on nodes 13 and 15 the primary and node...

Страница 260: ...dary nodes 14 16 press softkey 5 Pri Sec For measurements of TR turns ratio and TRL turns ratio by inductance softkey 5 toggles the display of measured test conditions It does NOT alter the designatio...

Страница 261: ...00 Np Ns 1000 365 The number of primary turns entered will be retained by the tester until the More softkey is selected i e if you exit LCR FIX and re enter or if you select TRL LL or C the value for...

Страница 262: ...e should be taken to avoid accidental or unexpected electrical shocks For this reason the high voltage insulation resistance source must be turned on by pressing softkey 3 every time this screen is di...

Страница 263: ...ATI USER MANUAL PAGE 6 15 Settings for the voltage integration can be changed by pressing softkey 4 Settings A Print option is included in this menu Press softkey 1 IR Voltage And then press Enter V...

Страница 264: ...key 5 CANCEL to discard changes and return to the previous menu Press softkey 4 DELETE to correct mistakes Insulation resistance set ups cannot be stored in memory but the voltage and used nodes are a...

Страница 265: ...Cs D Q Rs Cp D Q Rp More 2 4 Softkey 1 Softkey 3 Z Q D R X More 3 4 Softkey 1 Softkey 3 Rdc IR Off On More 4 4 LCR FIX only Softkey 1 Softkey 3 TR POL PHAS TRL POL LL C The active display combination...

Страница 266: ...acitance Series Circuit Cs Farads F Capacitance Parallel Circuit Cp Farads F Interwinding Capacitance C Farads F Quality Factor Q Dissipation Factor or tan D AC Impedance Magnitude of Complex Impedanc...

Страница 267: ...BNC and LCR FIX modes 6 3 1 LCR BNC MENU LCR BNC LCR FIX Execute Program Self Test R More 2 3 Q D Settings EXIT Signal Integration Compensate Print OK Enter f Enter V Enter I Enter IBias OK Lp Cs Cp M...

Страница 268: ...Integration Compensate Print OK Enter f Enter V Enter I Enter IBias Sec OK Lp Cs Cp More 1 4 D Rs Settings Sec EXIT Ls Q Z IR More 3 4 Settings Sec EXIT Rdc Pri One All One All OK Short Open Fix Auto...

Страница 269: ...of parts are tested at exactly the same conditions The LCR mode settings screen allows you to Enter fixed voltage and frequency test conditions Compensate for the effect of stray inductance and capaci...

Страница 270: ...FRONT PANEL MODES PAGE 6 22 VOLTECH ATI USER MANUAL Press the Settings softkey to reveal the settings menu Press the Signal softkey to show the signal settings...

Страница 271: ...V and ENTER Ibias These keys allow you to enter fixed values of voltage frequency and DC bias current using the 12 key numeric keypad The combination of AUTO f and a fixed value of voltage is NOT all...

Страница 272: ...lly choose a voltage or frequency Remember that the combination of AUTO f and a fixed voltage is not allowed Press Cancel at any time to discard any changes that you have made and to return to the pre...

Страница 273: ...erse video Press 5 with the Shift key in reverse to enter the multiplier k x1 000 Press 6 with the Shift key in reverse to enter the mulitiplier M x1 000 000 Press softkey 4 Delete to correct mistakes...

Страница 274: ...ents have been made with these new conditions measured values cannot be displayed on bottom line Having entered fixed values of voltage frequency and Ibias as required and pressed softkey 6 OK the scr...

Страница 275: ...tkey on the settings menu to reveal the integration options The integration level controls details of the measurement method including the number of readings that are averaged together to provide the...

Страница 276: ...l be output to the printer port of the ATi Measurements can be recorded on any standard printer with a conventional PC type parallel centronics input The output is formatted using standard codes so th...

Страница 277: ...tech recommends that all reference measurements should be made after compensation The ATi is fully compensated at the factory for a broad range of frequencies and compensation is often not required wh...

Страница 278: ...Transformer Shorting bobbin for compensation To compensate for the effect of stray capacitance the ATi must make a measurement with no winding s in place This is called open circuit compensation The...

Страница 279: ...any fixed frequency Choosing One sets up the ATi to perform compensation measurements at the chosen frequency only and is the preferred choice Choosing All will set up the tester to re compensate at a...

Страница 280: ...rs that can move in a position as close as possible to that which will be used when making measurements Press softkey 5 Start begin the compensation process Press softkey 6 OK to use any compensation...

Страница 281: ...us screen Once both short and open circuit compensation have been performed succesfully the words comp req will be removed from the compensation screen and from the main LCR or Rdc IR measurement scre...

Страница 282: ...either short or open circuit and repeat the compensation measurement In the unlikely event that compensation continues to fail you can use the ATi without compensation comp req will be shown on the di...

Страница 283: ...terminals of the part and if necessary trimming the test source to establish exactly the required conditions at the part This means that the ATi will automatically compensate for lead resistance and i...

Страница 284: ...program voltage For example if the AC impedance of the winding under test is only 0 1 at the specified frequency and you have specified a 5V test signal then the AT would have to supply 5V 0 1 50 Amp...

Страница 285: ...erload adjust V or f If you see either of the above error messages either decrease the test voltage or increase the test frequency until an acceptable condition is reached You could of course choose A...

Страница 286: ...displayed If you make a mistake choosing test parameters the ATi will sound a short beep and return to the previous screen condition Examples are attempting to enter AUTO frequency when a fixed voltag...

Страница 287: ...evel menu choose softkey 1 Programs The resulting programs screen displays a list of programs available in the local or Server program store depending upon the general program store set up of the test...

Страница 288: ...R MANUAL 6 6 1 CREATING A NEW TEST PROGRAM In order to create a new test program select New program using the arrow softkey and choose Set up softkey 2 The next screen shown is the test selection scre...

Страница 289: ...standard measure mode see below Use the arrow key softkey 2 to select a test to be set up For example scroll down one line to R Winding Resistance and press Enter to set up a winding resistance test o...

Страница 290: ...xample to set up limits scroll to the Limit type line and press softkey 3 three times to enter both minimum and maximum limit values Use the down arrow key again to scroll to the Minimum limit and Max...

Страница 291: ...nodes Choose Next At the following display see below you may choose to Measure if the test that is being set up supports this functionality Pressing Measure will update the limits as well as signal an...

Страница 292: ...ers that have been entered in a table format see below Note The OK softkey does not allow you to exit the test set up screen until all required test parameters have been entered 6 6 2 SETTING UP TEST...

Страница 293: ...own description Note that on this screen the shift key is not available for character entry On the program options screen the buttons on the instrument keypad will consecutively scroll you through bo...

Страница 294: ...OK to return to the program test selection screen and OK again to confirm your set up Note that if a password has been set the AT requests the password to be entered before the program can be saved E...

Страница 295: ...NNING A TEST PROGRAM To run the program use the arrow keys to select it and choose the Run softkey This will run the test program that has been created from the front panel of the instrument in exactl...

Страница 296: ...dit test programs that are stored in the AT Server or the AT s local program store save new or modified programs or delete test programs directly from the front panel To help protect existing test pro...

Страница 297: ...AT password may be set up directly from the main set up menu of the ATi From the top level instrument menu choose Set Up At the set up screen choose softkey 2 Set Up Use the down arrow key to scroll t...

Страница 298: ...set the existing password must be entered at the screen below before a new internal password can be set The internal AT password protection may be removed by setting the password to a blank password i...

Страница 299: ...VOLTECH ATI USER MANUAL PAGE 7 1 7 TESTS AND TEST CONDITIONS...

Страница 300: ...l Circuit 7 38 7 1 10 L2 Inductance Match 7 42 7 1 11 LL LLO Leakage Inductance and Leakage Inductance with Offset 7 45 7 1 12 C Interwinding Capacitance Test Parallel Circuit 7 50 7 1 13 CS and CP Ca...

Страница 301: ...Testing in Order to Trim a Component Value 7 111 7 1 29 OUT Control External Devices 7 113 7 1 30 LSBX Inductance with External Bias Series Circuit 7 116 7 1 31 LPBX Inductance with External Bias Para...

Страница 302: ...y in its intended application it should be constructed in accordance with the designer s specification The test specification or ATi test program calls for various electrical parameters to be measured...

Страница 303: ...e transformer LS Inductance Series Circuit As described above an inductance measurement will confirm that the correct number of turns has been wound and that the correct cores have been properly assem...

Страница 304: ...oupled in the final application Check the main primary to secondary capacitance and between secondaries where insulation is important LL Leakage Inductance The leakage inductance is a measure of how g...

Страница 305: ...etizing current test rather than inductance This test is available only on the Voltech AT3600 Hi Pot or Flash Testing Transformers are often used to provide safety isolation between the AC line and th...

Страница 306: ...ro At test conditions where the frequency is low enough for problems with capacitive impedance to be negligible the phase angle will be positive and close to 90 degrees Therefore an ANGL test can be u...

Страница 307: ...f turns right grade of correctly assembled core material L2 Inductance Match SMPS audio telecom Checks matching between windings LL LLO Leakage Inductance SMPS electronic ballasts Checks windings have...

Страница 308: ...ents Adjusts transformer parameter to desired value during test OUT Output to User Port Performs external switching as part of the test program LSBX Inductance with External Bias Series Circuit Wound...

Страница 309: ...VOLTECH ATI USER MANUAL PAGE 7 11 These tests require the use of one or more Voltech DC1000 Precision DC Bias Current Sources Contact your Voltech sales office for details...

Страница 310: ...ance tests applied to each winding Used together with the Stop on Fail option CTY will allow you to re insert a transformer into the fixture without recording a FAIL or wasting further test time CTY i...

Страница 311: ...nding resistance causes a voltage drop in the winding when current flows causing the output voltage to fall with increasing load Where Used A DC resistance test should be used to check each winding to...

Страница 312: ...omatically according to the value specified as maximum in the test limits Maximum Resistance 0 1 1 10 100 1k 10k 10k Test Signal 400mA 200mA 100mA 30mA 3mA 300 A 8 0V Programming the Test Using the PC...

Страница 313: ...inal value together with and percentage limits Minimum and maximum values A minimum value only A maximum value only Use the PC Editor s Measure button together with a sample part if you are unsure of...

Страница 314: ...of windings is controlled and matched to a specified ratio The absolute value of the resistances may be of less importance to the performance of the transformer than the match between two resistances...

Страница 315: ...for each of the two windings Programming the Test Using the PC Test Editor Select the integration time required Enter the terminal names between which the X resistance is to be measured Enter the term...

Страница 316: ...tester Select OK The test specification will now be displayed in the program window Use the PC Editor s Measure button together with a sample part if you are unsure of how to choose the test condition...

Страница 317: ...uction and dimensions of the core materials it may also vary with test conditions such as voltage and frequency The series and parallel inductance tests are used when testing signal pulse switched mod...

Страница 318: ...y be assumed to behave linearly in the operating region and the inductance measured at a low level represents the inductance that will appear in use Also it can usually be assumed that the inductance...

Страница 319: ...z 30KHz 10KHz 1KHz 100Hz 100Hz 50Hz 50Hz 50Hz 20Hz 10mV 30mV 50mV 100mV 100mV 100mV 300mV 1V 5V 5V 5V Ideal Test Conditions for Inductance Measurement The test conditions can also be determined automa...

Страница 320: ...ANUAL Programming the Test Using the PC Test Editor Choose the integration period normally Medium and enter the terminals to be measured Use the PC Editor s Measure button together with a sample part...

Страница 321: ...nce However at very high frequencies this is not so the capacitance dominates and inductance cannot be measured The self resonant frequency of the transformer is the changeover point between these two...

Страница 322: ...ts will then agree See also the comments below on differences caused by the choice of equivalent circuit d Equivalent Circuit Inductance is always measured as part of a complex impedance the result be...

Страница 323: ...ferrite cores can often be tested to a tolerance of 2 For un gapped cores the tolerance may have to be as much as 20 because of the core s manufacturing tolerance If the User Offset Enabled check box...

Страница 324: ...an be represented on the equivalent circuit of a transformer by a resistance associated with the inductance of the winding For this equivalent circuit the Quality Factor Q is defined as Q Ls where 2 f...

Страница 325: ...sing harmonic analysis the measured voltage is divided by the current to obtain a complex impedance from which the Quality Factor is obtained Choosing the Test Signal For optimum accuracy and performa...

Страница 326: ...red Use the Editor s Measure button together with a sample part if you are unsure of how to choose the test conditions Choosing Test Limits The test limits can be A nominal value together with and per...

Страница 327: ...ransformer may have a Q 20 A specially designed low loss transformer may have a Q 100 Because Q is a ratio of two impedances it has no units If the User Offset Enabled check box is checked a value can...

Страница 328: ...losses in a capacitor It is analogous to Q for a transformer winding For this equivalent circuit the Dissipation Factor D is defined as D Rs where 2 f 1 Cs For a given capacitance the lower the equiva...

Страница 329: ...current to obtain a complex impedance from which the Dissipation Factor is obtained Choosing the Test Signal For optimum accuracy and performance use the test conditions chosen for capacitance in a l...

Страница 330: ...n period normally Medium and enter the terminals to be measured Use the Editor s Measure button together with a sample part if you are unsure of the nominal value Choosing Test Limits The test limits...

Страница 331: ...al value Typically D is tested against a maximum value A typical film dielectric capacitor may have a D 0 01 Because D is a ratio of two impedances it has no units If the User Offset Enabled check box...

Страница 332: ...e DC resistance Where Used The equivalent series or parallel resistance test is used to determine the AC equivalent resistances of a transformer As opposed to the DC resistance test R which uses DC vo...

Страница 333: ...complex impedance from which the equivalent series and parallel resistances are obtained Choosing the Test Signal For optimum accuracy and performance use the test conditions chosen for inductance in...

Страница 334: ...ed Use the PC Editor s Measure button together with a sample part if you are unsure of how to choose the test conditions Choosing Test Limits The test limits can be A nominal value together with and p...

Страница 335: ...m etc when entering absolute values as limits Test limits should be set as close as possible to detect assembly faults If the User Offset Enabled check box is checked a value can be entered into the e...

Страница 336: ...ansformers and chokes are designed to operate with a DC bias current flowing in a winding The inductance of a winding is determined by the number of turns and the construction and dimension of the cor...

Страница 337: ...ted Generally it is not necessary to measure the inductance at the normal operating conditions of the transformer which could involve for example hundreds of volts or several amps of bias This is beca...

Страница 338: ...rmally Medium and enter the terminals to be measured Do use the PC Editor s Measure button together with a sample part if you are unsure of how to choose the test conditions Choosing Test Limits The t...

Страница 339: ...s should be set as close as possible to detect assembly faults A transformer made with a pair of gapped ferrite cores can often be tested to a tolerance of 2 For un gapped cores the tolerance may have...

Страница 340: ...s consisting of the same number of turns and wound on the same core should have the same inductance value Where Used The inductance match test as opposed to an ordinary inductance measurement LS or LP...

Страница 341: ...for match Choosing Test Conditions For optimum accuracy and performance use the test conditions shown in the inductance section of this chapter for each of the two windings The frequency will be comm...

Страница 342: ...th a sample part if you are unsure of how to choose the test conditions Choosing the Test Limits The test limits are a nominal value together with and percentage limits Use the PC Editor s Measure but...

Страница 343: ...ng between windings a short circuited transformer acts as if there is inductive impedance in series with the winding This impedance is known as the leakage inductance Low leakage inductance implies go...

Страница 344: ...y specifications When measuring on certain components and particularly where the leakage inductance is below 1 H it may not be possible for the AT to properly compensate for all parasitic effects To c...

Страница 345: ...10mH 100mH 1H 10H 300kHz 100kHz 30kHz 10kHz 1kHz 100Hz 100Hz 50Hz 50mA 20mA 10mA 5mA 5mA 5mA 1mA 500 A The test conditions can also be determined automatically by the ATi according to this table Note...

Страница 346: ...more of the available terminals to the used section of the dialogue NOTE Because leakage inductance is measured with a secondary winding shorted out be careful to choose a test signal that will not c...

Страница 347: ...the units of limits nH mH etc when entering absolute values as limits Note that more than one secondary can be short circuited at the same time by adding more of the available terminals to the used se...

Страница 348: ...ent layers within a winding and between the outside layer of one winding and the inside layer of the next Although the capacitance is distributed across windings it is usually represented by a simple...

Страница 349: ...T Series C test uses a parallel equivalent circuit for capacitance measurements CS series circuit capacitance is also available Choosing the Test Signal Recommended test conditions for different value...

Страница 350: ...the integration period normally Medium and enter the terminals to be measured More than one terminal can be High and more than one terminal can be Low This is to allow testing of the complete primary...

Страница 351: ...nsformers are not a problem and therefore capacitance is measured with as large a voltage as possible c Equivalent Circuit As with inductance capacitance is actually measured as a complex impedance an...

Страница 352: ...minal value Remember to click on the units of limits pF nF etc when entering absolute values as limits Test limits should be set as close as possible to the nominal value in order to detect faults A t...

Страница 353: ...e the capacitance of a wide range of components up to 1 milli farad Test Conditions To measure capacitance the tester applies an AC voltage across the designated terminals It then measures the voltage...

Страница 354: ...tically by the ATi according to this table Voltage Specified Auto Auto Frequency Specified Specified Auto Note that a fixed voltage signal cannot be used with an Auto frequency CS and CP are currently...

Страница 355: ...the next Although the capacitance is distributed it is usually represented by a simple equivalent circuit showing a single capacitance from one winding to the next Where Used The capacitance match te...

Страница 356: ...the match of the two measured capacitances may be set in terms of the ratio between them e g 1 1 5 By adding further capacitance match tests to the program any number of inter winding capacitances ca...

Страница 357: ...test conditions can also be determined automatically by the ATi according to this table Voltage Specified Auto Auto Frequency Specified Specified Auto Note that a fixed voltage signal cannot be used w...

Страница 358: ...ing and another The secondary voltage may be in phase with the primary voltage or it may be anti phase depending on the winding and the termination of the windings Where Used The turns ratio test is u...

Страница 359: ...ratio between two windings that should be accurately matched at 1 1 In this case it may be better to energize a third winding with a lower number of turns to ensure that any measurement errors apply...

Страница 360: ...age Specified Auto Auto Frequency Specified Specified Auto Note that a fixed voltage signal cannot be used with an Auto frequency Programming the Test Using the PC Test Editor Choose the integration p...

Страница 361: ...ease in the test frequency so that the current taken by the driven winding does not become too large but in general this frequency increase should be kept as small as possible to avoid problems caused...

Страница 362: ...TESTS AND TEST CONDITIONS PAGE 7 64 VOLTECH ATI USER MANUAL In this way windings that should be matched are treated equally during the test...

Страница 363: ...e the exact result of this conversion by clicking on limits in the Editor dialogue once the absolute limits have bee entered For example take a typical Switched Mode Power Supply transformer with wind...

Страница 364: ...l result in equivalent limits of 19 and 21 Ideal for detecting errors of one turn or more What happens if I set absolute limits for both primary and secondary windings If you want to detect up to a te...

Страница 365: ...l certainly detect a one turn error in the primary but because of the physical errors already described these limits may be too severe for a normal good part This is why a combination of inductance an...

Страница 366: ...e number of turns on another winding is important for the proper operation of any transformer The turns ratio is often determined by calculating the ratio of the voltages produced across the windings...

Страница 367: ...d frequency is applied to each winding in turn and the inductance of each is determined from the measured voltage and current using harmonic analysis The turns ratio is then calculated as the square r...

Страница 368: ...signal and show the measured turns ratio Set percentage limits on this ratio and click OK you may select a polarity test before clicking OK Using the Auto Button to Set Secondary Voltage To do this yo...

Страница 369: ...dary windings The optimum test conditions are chosen for an inductance value that is between the primary and secondary Lm Look up the recommended test signal for this inductance Enter the recommended...

Страница 370: ...determine the test conditions according to the following table Voltage Specified Auto Auto Frequency Specified Specified Auto Note that a fixed voltage signal cannot be used with an Auto frequency Ch...

Страница 371: ...ndary voltage may be in phase with the primary voltage or it may be anti phase depending on the winding and the termination of the windings Where Used The low voltage open circuit test is used to conf...

Страница 372: ...d can be an AC or a DC voltage It is recommended that you choose the winding with the highest number of turns as the one to be energized Choosing Test Conditions The recommended test conditions depend...

Страница 373: ...Auto Auto Frequency Specified Specified Auto Note that a fixed voltage signal cannot be used with an Auto frequency Programming the Test Using the PC Test Editor Choose the integration period normall...

Страница 374: ...Test Limits The test limits can be A nominal value together with and percentage limits Minimum and maximum values A minimum value only A maximum value only Use the Editor s Measure button together wi...

Страница 375: ...astic moulding on the bobbin The quality of the insulation can be assessed by applying a DC voltage across the insulation and measuring the resistance The voltage applied is usually greater than the v...

Страница 376: ...ny windings as you wish The voltage and current are measured dividing the voltage by the current gives the insulation resistance Choosing Test Conditions The voltage should normally be set to just gre...

Страница 377: ...capable of measuring insulation resistance values greater than 1G there is no need to specify so high a value to check that windings are isolated In many cases specifying a lower value will speed up...

Страница 378: ...e ability of the transformer to reject unwanted noise signals that are common to both input terminals with respect to a common point An ideal transformer would have infinite CMRR Vout1 0 In practice d...

Страница 379: ...wn This may be done automatically using the tester s OUT test The voltages Vout1 and Vout2 are measured whilst Vin is held constant The ratio of these two voltages reflects the transformer under test...

Страница 380: ...but are not shown on the Editor schematic They are switched in circuit using an OUT test that must be inserted in the program before the GBAL test The relay patterns associated with inserting and rem...

Страница 381: ...ter the required terminal names Terminals X the energized winding Terminals X the measured voltage VOUT1 Terminals Y the energized winding normally the same as the Terminals X energized winding Termin...

Страница 382: ...osing Test Limits The test limits can be A nominal value together with and percentage limits Minimum and maximum values A minimum value only A maximum value only Use the PC Editor s Measure button tog...

Страница 383: ...h respect to a common point An ideal transformer would have infinite CMRR Vout1 0 In practice differences in symmetry of transformer construction mean that input common mode signals appear as unwanted...

Страница 384: ...ts above which the tester automatically configures First the test voltage Vin is applied as a common mode signal and the output voltage Vout1 is recorded and then the same Vin is applied as a normal i...

Страница 385: ...s have deliberately not been included in the GBAL test dialogue for two reasons a it would make the dialogue too complicated and b it is not always necessary e g in the case of a fixture where the res...

Страница 386: ...d to determine the test voltage Choosing Test Limits The test limits can be A nominal value together with and percentage limits Minimum and maximum values A minimum value only A maximum value only Use...

Страница 387: ...Insertion Loss ILOS tests repeated at different frequencies The resistors shown are fitted to the test fixture and should be switched out of circuit when making other measurements such as resistance...

Страница 388: ...the result of a RESP test is the referred ILOS result that is closest to the limit If any of the referred ILOS results are outside the specified limits the RESP result is the referred ILOS result that...

Страница 389: ...f the Hi and Lo input terminals Enter the names of the Hi and Lo output terminals Add test frequencies as required by entering the frequency and clicking add There are normally at least 2 additional t...

Страница 390: ...fitted to the fixture there is no need to enter their values here since the RESP test result is the difference between two ratios based on the same resistor values The resistor values cancel out in th...

Страница 391: ...resistance losses mean that some power is always consumed by a transformer reducing the power available to the load from the theoretical maximum Where Used The insertion loss test is used to check the...

Страница 392: ...Choosing Test Conditions The voltage and frequency are usually determined by the final application of the part under test Programming the Test Using the PC Test Editor Note that the PC Editor s Measur...

Страница 393: ...nimum and maximum values A minimum value only A maximum value only Use the PC Editor s Measure button together with a sample part if you are unsure of the nominal value If the User Offset Enabled chec...

Страница 394: ...he transformer Where Used The return loss test is used to check the impedance of audio and telecommunications transformers that are to be used with transmission lines of specified impedance The test h...

Страница 395: ...ce Rm is the resistive portion of the measured device s impedance Xo is the reactive portion of the reference impedance Xm is the reactive portion of the measured device s impedance Choosing Test Cond...

Страница 396: ...on line to which the transformer will be connected in its final application This is a complex impedance Z R jX where R is the real part of the impedance and X is the imaginary part A typical impedance...

Страница 397: ...nal value together with and percentage limits Minimum and maximum values A minimum value only A maximum value only Use the PC Editor s Measure button together with a sample part if you are unsure of t...

Страница 398: ...imaginary parts of the total impedance The impedance test checks the impedance of audio and telecommunications transformers that are to be used with transmission lines of specified impedance The test...

Страница 399: ...as current By measuring both the applied AC voltage and the resulting AC current the total impedance is calculated Z is the magnitude of the complex impedance Z R 2 X 2 Choosing Test Conditions The vo...

Страница 400: ...ominal value together with and percentage limits Minimum and maximum values A minimum value only A maximum value only Use the PC Editor s Measure button together with a sample part if you are unsure o...

Страница 401: ...aginary parts of the total impedance Where Used The X test checks the reactance or imaginary part of the complex impedance of audio and telecommunications transformers that are to be used with transmi...

Страница 402: ...voltage and the resulting current Using harmonic analysis the measured voltage is divided by the current to obtain a complex impedance from which X the imaginary part of the impedance is obtained X i...

Страница 403: ...inary parts The phase angle of the complex impedance at a specified frequency is tan 1 X R Where R and X are the real and imaginary parts of the complex impedance See also the impedance test Z which m...

Страница 404: ...easurement Conditions The AT Series Tester applies the specified AC voltage to the winding under test Using harmonic analysis the phase angle of the impedance is determined from the measured voltage a...

Страница 405: ...Test Limits The test limits can be A nominal value together with and limits of up to 90 and 90 deg Minimum and maximum values Use the PC editor s Measure button together with a sample part if you are...

Страница 406: ...here the turns ratio or open circuit voltage tests measure the amplitude of the voltages the PHAS test measures the phase difference between the two voltage waveforms Where Used The interwinding phase...

Страница 407: ...cified AC voltage to one winding and measures the voltage produced across two windings one of which may be the energized winding The phase angle between the voltages is determined using harmonic analy...

Страница 408: ...the angle between the primary and secondary terminals High and Low Terminal names Note that the PC Editor s Measure button CANNOT be used to determine the test voltage Choosing Test Limits The test li...

Страница 409: ...in specified limits by adjusting a trimmable core Test Conditions A TRIM test may be used after any low voltage test on the tester If the desired parameter is outside the limits specified by that prev...

Страница 410: ...RLS RLP LS LP LSP LSB Q C TR LL LLO TR L2 C2 GBAL LBAL ILOS RLOS and Z Choosing Test Conditions On selecting TRIM Trimming Adjustment from the Available Tests Window the following dialogue box will b...

Страница 411: ...verything necessary to drive an external 12V DC relay is available Pin Signal Name Pin Signal Name 1 o p User Relay Drive 0 6 o p User Relay Drive 1 2 o p User Relay Drive 2 7 o p User Relay Drive 3 3...

Страница 412: ...a test sequence like any other test The OUT test programmes any of the six available relay drives in any pattern desired The drives stay in the programmed state until another OUT test is performed or...

Страница 413: ...given will remain in place until another OUT test is encountered Therefore if the settings are required for one part of the test program only two OUT tests will be required the first to turn the appr...

Страница 414: ...f a transformer winding while an external bias current is flowing through it may be tested using series or parallel equivalent circuit models Initially the DC bias current is set up and allowed to sta...

Страница 415: ...cified Specified Auto Bias Specified Specified Specified Specified 2 Select mouse click the button the integration time you require Medium is the default setting Long will give you more stable reading...

Страница 416: ...a transformer winding while an external bias current is flowing through it may be tested using series or parallel equivalent circuit models Initially the DC bias current is set up and allowed to stab...

Страница 417: ...cified Specified Auto Bias Specified Specified Specified Specified 2 Select mouse click the button the integration time you require Medium is the default setting Long will give you more stable reading...

Страница 418: ...ias Current Sources Contact your Voltech sales office for details The Winding Impedance with External Bias test measures the impedance of a selected winding while applying a DC current from the DC1000...

Страница 419: ...formation refer to the Test Program Editor of your AT manual 2 Select the integration time required Medium is the default setting Long will give more stable readings for tighter limits at the expense...

Страница 420: ...CONDITIONS PAGE 7 122 VOLTECH ATI USER MANUAL Enter minimum and maximum values Enter just a minimum value Enter just a maximum value 5 Select OK The test specification will then be displayed in the p...

Страница 421: ...series or parallel equivalent circuits will not necessarily be the same and care should be taken when choosing which equivalent circuit to use when testing Any practical inductor or capacitor will no...

Страница 422: ...ificant Choose the SERIES equivalent circuit If the inductance is large 1 Henry and or the series resistance Rs is very small the parallel equivalent circuit is sometimes used For a CAPACITIVE IMPEDAN...

Страница 423: ...fully automatic or user programmed following the guidelines given earlier in this chapter Measurements are usually made using the parallel equivalent circuit see the preceding section D Dissipation Fa...

Страница 424: ...l LCR mode Use the test conditions determined for the C test ESR is a measure of equivalent AC resistance at a specified frequency and will be different to the expected DC resistance of contacts and l...

Страница 425: ...VOLTECH ATI USER MANUAL PAGE 8 1 8 SPECIFICATIONS...

Страница 426: ...SPECIFICATIONS PAGE 8 2 VOLTECH ATI USER MANUAL...

Страница 427: ...s 8 12 8 2 6 TR Test 8 13 8 2 7 LVOC Test 8 14 8 2 8 TRL Test 8 15 8 2 9 IR Test 8 16 8 2 10 L2 C2 and R2 Tests 8 17 8 2 11 GBAL Test 8 18 8 2 12 LBAL ILOS and RESP Tests 8 19 8 2 13 RLOS Test 8 20 8...

Страница 428: ...SPECIFICATIONS PAGE 8 4 VOLTECH ATI USER MANUAL 8 4 EMC COMPLIANCE 8 35 8 4 1 Declaration of Conformity 8 35 8 4 2 EMC Precautions 8 36...

Страница 429: ...lity Factor 0 001 1000 1mV 5V 20Hz 3MHz 0 5 D Dissipation Factor tan 0 001 1000 1mV 5V 20Hz 3MHz 0 5 RLS Equivalent Series Resistance 10 10M 1mV 5V 20Hz 3MHz 0 05 RLP Equivalent Parallel Resistance 10...

Страница 430: ...0dB 100dB 1mV 5V 20Hz 3MHz 0 5dB ILOS Insertion Loss 100dB 100dB 1mV 5V 20Hz 3MHz 0 5dB RESP Frequency Response 100dB 100dB 1mV 5V 20Hz 3MHz 1 0dB RLOS Return Loss 100dB 100dB 1mV 5V 20Hz 3MHz 0 2 Z I...

Страница 431: ...A to 100mA 20Hz to 3MHz 0 2 Notes 1 AR basic relative accuracy full specifications follow Specification at 23 C 5 C after one hour warm up and long integration 2 Absolute maximum ratings for all test...

Страница 432: ...AT is the total accuracy AR is the basic relative accuracy AC is the calibration accuracy AV is the correction for voltage level AI is the correction for current level The value of AR is given in the...

Страница 433: ...r voltage level AI is the correction for current level AQ is the correction for Q factor AB is the correction for Bias The value of AR is given in the table in section 8 1 of this chapter The values o...

Страница 434: ...ection for Q factor ASC is the correction factor for the short circuit impedance The value of AR is given in the table in section 8 1 of this chapter The values of the other factors are given below AC...

Страница 435: ...l AI is the correction for current level AQ is the correction for Q factor AF is the correction for C The value of AR is given in the section 1 1 of this chapter The values of the other factors are gi...

Страница 436: ...accuracy AI is the correction for current level AQD is the correction for Q or D factor The value of AR is given in the table in section 8 1 of this chapter The values of the other factors are given b...

Страница 437: ...oltage level ASV is the correction for secondary voltage level AN is the correction for the turns ratio value The value of AR is given in the table in section 8 1 of this chapter The values of the oth...

Страница 438: ...AT is the total accuracy AR is the basic relative accuracy AC is the calibration accuracy AV is the correction for voltage level The value of AR is given in the section 8 1 of this chapter The values...

Страница 439: ...racy for the test is given as S P T A A A Where AT is the total accuracy AP is the accuracy of the primary winding measurement AS is the accuracy of the secondary winding measurement To determine the...

Страница 440: ...AR is the basic relative accuracy AC is the calibration accuracy AI is the correction for current level AZ is the correction for impedance level The value of AR is given in the table in section 8 1 o...

Страница 441: ...the two inductance capacitance or resistance measurements made and is given as Where AT is the total accuracy AX is the accuracy of the X measurement AY is the accuracy of the Y measurement Refer to...

Страница 442: ...he value of AR is given in the table in section 8 1 of this chapter The values of the other factors are given below Where FM is the measurement frequency Hz VMX is the measured voltage for the X measu...

Страница 443: ...for calibration AVI is the correction for the input voltage level AVO is the correction for the output voltage level The value of AR is given in the table in section 8 1 of this chapter The values of...

Страница 444: ...the total accuracy dB AZ is the total accuracy for the Z test Z is VM IM ZR is 2 2 imag real Z Z Where VM is the measured voltage V IM is the measured current A Zreal is the real part of the referenc...

Страница 445: ...ection for voltage level AI is the correction for current level The value of AR is given in the table in section 8 1 of this chapter The values of the other factors are given below Where FM is the mea...

Страница 446: ...tion for voltage level AI is the correction for current level The value of AR is given in the table in section 8 1 of this chapter The values of the other factors are given below Where FM is the measu...

Страница 447: ...voltage level AN is the correction for turns ratio The value of AR is given in the table in section 8 1 of this chapter The values of the other factors are given below Where FM is the measurement fre...

Страница 448: ...ection for current level AQ is the correction for Q factor AB is the correction for Bias The value of AR is given in the table in section 8 1 of this chapter The values of the other factors are given...

Страница 449: ...om left to right Barcode Server Printer Auxiliary Editor Remote User Ground All these ports may be susceptible to damage from static discharge Switch off and observe anti static precautions when makin...

Страница 450: ...rd available from Farnell Electronic Components Hewlett Packard List No HBSW 8300 The HP Smart Wand reader connects directly to the barcode port no extra interfacing is required to configure the HBSW...

Страница 451: ...ame Pin Signal name 1 Ground Earth 6 No connection 2 i p RX 7 0V 3 o p TX 8 No connection 4 i p CTS 5 o p RTS 25 No connection 8 3 3 AUXILIARY PORT RS232 interface for connection to a PC running the V...

Страница 452: ...nnection 4 o p D2 14 o p AUTOFD 5 o p D3 15 i p ERROR 6 o p D4 16 o p INIT 7 o p D5 17 o p SLCTIN 8 o p D6 18 0V 9 o p D7 10 i p ACKNLG 25 0V Signals with a name starting with are active Lo Printing o...

Страница 453: ...p BEEP 9 DO NOT USE 2 OV 10 o p PASS Bin1 3 12V 11 i p STOP 4 o p FAIL BinStrb 12 i p RUN 5 DO NOT USE 13 OV 6 OV 14 5V 7 o p BUSY Bin0 15 NOT USED 8 DO NOT USE Signals with a name starting with are a...

Страница 454: ...ass and Fail They could for example be connected as status inputs to a robot controller or a bin selector Beep Output Pin 1 This is an active Hi output that copies the internal beeper It is configured...

Страница 455: ...ble inputs The relay drives are switched on and off by certain optional tests e g the OUT test inserted into your test program This will enable you for example to switch a dummy load on to the seconda...

Страница 456: ...User Relay Drive 1 2 o p User Relay Drive 2 7 o p User Relay Drive 3 3 o p User Relay Drive 4 8 o p User Relay Drive 5 4 i p User Input 0 9 i p User Input 1 5 o p 12V User Relay Drive Outputs pins 1 2...

Страница 457: ...tage 5V Minimum input voltage 0V Minimum logic 1 input 4V Maximum logic 0 input 0 25V The zero reference voltage for these inputs is the 0V ground 4mm socket situated on the right of the ATi unit The...

Страница 458: ...t 87 to 265V ac 47 or 440Hz 100VA Fuse 1 6AT Dielectric Strength 2kV ac 50Hz for 1 minute line input to case Storage Temperature 40 to 70 C Operating Temperature 0 to 40 C Humidity 10 to 90 RH non con...

Страница 459: ...truments Ltd ATi BS EN 61010 1993 amendment A2 1995 The product herewith complies with the requirements of the EMC Directives 89 336 EEC and 92 31 EEC and the Low Voltage Directive 73 23 EEC BS EN 550...

Страница 460: ...sceptible to Fast Electrical Transients on the power line and Electrostatic Discharges which can disrupt the operation of the unit In the event of these circumstances return the ATi to normal operatio...

Страница 461: ...VOLTECH ATI USER MANUAL PAGE 9 1 9 WARRANTY AND SERVICE...

Страница 462: ...WARRANTY AND SERVICE PAGE 9 2 ATI USER MANUAL...

Страница 463: ...VOLTECH ATI USER MANUAL PAGE 9 3 Contents Warranty and Service 9 1 WARRANTY 9 5 9 2 LIMITATION OF WARRANTY 9 5 9 3 SERVICE AND CALIBRATION 9 6 9 4 OBTAINING SERVICE AND APPLICATIONS SUPPORT 9 6 9 5 F...

Страница 464: ...WARRANTY AND SERVICE PAGE 9 4 ATI USER MANUAL...

Страница 465: ...ive this benefit in any event where it is clear upon inspection that the cause of the failure is due to customer misuse Voltech will be the sole arbiter in this circumstance Voltech will pay all retur...

Страница 466: ...AT series tester a calibration check should be carried out every 12 months Calibration is carried out using a special fixture as described in the next section The calibration can be performed by an a...

Страница 467: ...ur local supplier or see the Voltech website at www voltech com for details Upgrade firmware is distributed in a file with the extension ABS Upgrade firmware is available at the Voltech website or fro...

Страница 468: ...ditor will now check the boot code version already inside the AT If the boot code requires upgrading the Editor will prompt you with a warning that communications must not be disrupted during the 12 m...

Страница 469: ...ure Parts from Voltech 5 13 Fixtures Description 5 6 Footswitch 2 9 FREQUENCY RESPONSE 7 89 Front Panel 2 7 Hints and Tips 3 48 IMPEDANCE 7 100 INDUCTANCE 7 19 7 38 7 117 7 119 INDUCTANCE MATCH 7 42 I...

Страница 470: ...connections 2 14 Server Installation Getting Started 2 14 SERVER PORT 8 27 Service 9 6 SETTINGS 6 21 Signal 6 22 Softkeys 2 8 Specification summary 8 5 STATISTICS BASIC STATISTICS 4 14 Stop on Fail 2...

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