- Voltech Instruments
Contents
1. belt ell Mala bbs dala 30 COMMANDS te ae DM M DD MA A D te 31 T RNTHEQUTPUTON ORO F t tete t ec a dad e UE tete 31 SETDC1L000 OUTPUT CURRENT ihe ainn e a rte rte 32 GETTHE STATUS sadia teet te nne 32 READ THE SERIAL NUM ci eet Sei a a Seed a eno 33 GET THE NUMBER OF UNITS ATTACHED eene nennt nennt nbn bu 33 STATUS NUMBERS irish rin a cn af a a c i a i nd n d i A a 34 CAU BRAT O N cc sion sad ae vi au i c re c Fi Ed a a Aa n 35 ACCESSO ERES 35 PCSOPIWARE 2 aurea aa cg E E T 36 INSTALLING THE SOFTWARES testet aep O UA 36 CONNECTING THE EQUIPMENT uu cscscscscscscsescssscscscsscseecesssssecesssssecesususecnsssueseesusueseesusuesensusussensusussensusussensusussensuenesenenes 36 USING THE SOFTWARE tai testi teni i er nd SPECIFICATIONS COMPLIANCE This product is warranted against defect in materials and workmanship for a period of one year from the date of shipment During the warranty period Voltech will at its option either repair or replace products that prove to be defective For repair services under warranty the instrument must be returned to a Voltech designated service center Ple2. Fig 13 To program the test 1 Enter the value of a voltage or current for the signal and the required frequency of the test Also enter the bias current you would like to apply Please note that the Measure button may be used here For information 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 of time and Short will test at the maximum speed but may give slightly noisier readings 3 Enter the terminal names between which the impedance is to be measured 4 Setthe impedance limits Enter a nominal value and then the limits as negative and positive values 28 gt lt Enter minimum and maximum values gt Enter just a minimum value lt Enter just a maximum value 5 Select OK The test specification will then be displayed im the program window 29 5232 Communication RS 232 connection Many PCs today do not come with an RS232 as standard To add an RS232 port to your PC Voltech recommend the use of one of the following USB to RS232 converters 1 USB Gear www usbgrear com part number USBG RS232 F12 2 Cables to Go www cablestogo com part number 26886 Both of these cables have been verified with the DC1000 software Pinning The pinning of the 2 RS232 ports is as follows RS232 IN TX PIN 3 RX PIN 2 CTS P
3. e Use fuses only of the type and rating 4 004 5X20 TLAG HI BREAK VPN 66 052 e DC1000 has been constructed in compliance with the requirements of EN61010 1 Pollution Degree 2 Installation Category FOR INDOOR USE ONLY This ensures the safety of the instrument and the user when normal precautions are followed WHAT IS THE DC1000 The DC1000 is a DC Bias current source that can generate between O and 25A Up to ten DC1000 s can simply be joined together in parallel to produce up to 250A The DC1000 can be used with almost any LCR meter making it unique amongst all DC Bias Current Sources It can also be used with either the Voltech ATi or the AT3600 transformer testers these products have specific programs for testing using the DC1000 LPBX LSBX and ZBX WHAT CAN THE DC 1000 DO FOR You The DC1000 is used to characterize wound components that are intended for use in high current DC power supplies and DC to DC converters It is wed to apply a DC current through the component to be tested allowing an LCR meter or Voltech AT series product to measure the inductance of the component at that DC current Unlike a regular DC power supply the DC1000 minimizes the load on an LCR meter Regular loading would cause gross errors in the measurement of inductors Additionally unlike DC Bias sources from other manufacturers the Voltech DC1000 can be used with almost any LCR meter PACKING LIST When you r
4. please contact your local Voltech supplier The part numbers for the parts supplied with your unit are given in the section Packing List in this manual The Voltech part number for the RS232 cable supplied with AT products that you can use to interface with the DC1000 is 77 015 The Voltech part number for the Null Modem cable for PC software connectivity is 77 045 A similar cable is also available from www cablewholesale com p n 10D1 20206 This part number was correct at time of publication of this manual 35 PC SOFTWARE To support the measurement of inductors under different DC load currents Voltech has developed a simple PC software application that will enable you to use your DC1000 and an LCR meter to make inductance measurements with different DC bias current levels The results can be displayed graphically on the screen as well as saved to a file Installing the Software The software is available from Voltech s web site www voltech com in the support section You should download the DC1000 zip file and save this to your PC Once downloaded extract the contents to a temporary folder The DC1000 Software zip file contains both the PC application and the National Instruments VISA runtime engine which is required to run the PC software To install the software run setup exe from the folder to which the DC1000 zip files were extracted Follow the on screen instructions To install the N
5. user manual with the combinations of test parameter specification shown in the following table Es Option 1 Option 2 Option 3 Option 4 Specified voltage Specified current Specified Specified Specified Specified Specified Specified Specified 2 Select mouse click the button the integration time you require 24 Medium is the default setting Long will give you more stable readings for tighter limits at the expense of test time and Short will test at the maximum speed but may give slightly noisier readings 3 Enter the terminal names between which the inductance will be measured By pulling down the menu along side the fill in box you may select the high and low terminals for each test 4 Select mouse click the button the type of limits you reguire and enter the values Enter a nominal value and then the limits as negative and positive values gt lt Enter minimum and maximum values gt Enter just a minimum value lt Enter just a maximum value 5 Select OK The test specification will then be displayed in the program window LPBX INDUCTANCE WITH EXTERNAL BIAS PARALLEL CIRCUIT The inductance of 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 stabilize An AC voltage is applied across the selected winding the voltage ac
6. Fig 6 Connect your computer s RS232 port to RS232 IN port of the first DC1000 in your chain DC1000 1 using a 9 way male to 9 way female null modem cable see Accessories section of this user manual Connect the RS232 IN port of the next DC1000 in your chain to the previous DC1000 s RS232 OUT NOTE See the RS232 communications section for information on USB to RS232 converters 18 Using CONTROL YOUR DC1000 s WITH AN 5232 LCR METER NOT A VOLTECH AT SERIES PRODUCT To use your PC to control your DC1000s and an LCR meter with RS232 communications capability follow the setup in Fig 7 HI LCR Pair DC 1000 Output LOLCR Pair DC1000 Output PC RS232 DC1000 1 RS232 IN DC1000 1 RS232 OUT Master DC1000 2 RS232 IN Slave DC1000 2 RS232 OUT LCR Meter RS232 Port Fig 7 LADA Connect your computer s RS232 port to RS232 IN port of the first DC1000 in your chain DC1000 1 using 9 way male to 9 way female null modem cable see Accessories section of this user manual When using an LCR meter with RS232 communications capability connect the RS232 port of the LCR meter to RS232 OUT port of the last DC1000 DC1000 2 in the Fig 7 in your chain using a null modem cable see the Accessories section of this user manual for details on a null modem cable available from Voltech but please note th
7. 0 1 523 3 DC1000 2 RS2 4 0 1000 2 RS Fig 9 Connect the Auxiliary port on your Voltech ATi or AT3600 to the RS232 IN port on your DC1000 using the 9 way male to 9 way female straight through RS232 cable that was provided with your DC1000 NOTE See the RS232 communications section for information on USB to RS232 converters If you wish to use a PC to control your AT36 when you have a DC1000 hooked up to the auxiliary port attach the PC s RS232 connector to the DC1000 s RS232 OUT port using the 9 way male to 9 way male straight through RS232 cable that was provided with your AT product This setup will work with any communications software you use e g Voltech AT Editor Software or Voltech DC1000 PC Software 21 When using the DC1000 PC Software which was provided with your DC1000 the HI side of the DC1000 output and of the inductor under test should be connected to node 15 of the AT fixture being used and the LO side should be connected to node 13 There are standard fixtures available from Voltech that provide connection to these nodes for example the LCR Fixture VPN 91 227 See the Fixtures chapter of your AT manual for information regarding standard and custom fixture solutions To use any Voltech software with an AT series product specific DC1000 tests LPBX LSBX and ZBX must be installed the AT being used As with all Voltech AT tests these are provided on a per AT basis so no matter ho
8. 00 Output 3 DC1000 1 RS232 OUT Master 4 DC1000 2 RS232 IN Slave Fig 5 Be sure to connect the HI side of your LCR meter to the same side of the inductor to which the HI sides of your DC1000s are attached and use the opposite side of the inductor to connect the LO sides of both the DC1000s and the LCR meter Connect the 9 Way RS232 cable between the RS232 OUT of the first DC1000 in your chain and the RS232 IN of the second DC1000 using the cable provided with your DC1000 Then if you have more than two DC1000 s connect the RS232 OUT of the second DC1000 in your chain to the RS232 IN of the third Follow the same pattern for any remaining DC1000 s you wish to connect together in parallel Always connect directly from EACH DC1000 in your chain to the inductor NEVER daisy chain the outputs of multiple DC1000 s The accumulated current could exceed the rating for the supplied cable and cause fire and injury LCR COMPENSATION WITH MULTIPLE 0 10005 When compensating your LCR meter for use with the DC1000s always set each DC1000 s current to 0 00 and turn the output ON at each unit 17 Using A PC CONTROL YOUR DC 1000 s To use a PC to just control your DC1000s but not controlling an LCR meter at the same time follow the setup in Fig 6 HI LCR Pair DC 1000 Output LO LCR Pair DC1000 Output PC RS232 DC1000 1 RS232 IN DC1000 1 RS232 OUT Master DC1000 2 RS232 IN Slave
9. 1000 or multiple instruments to your safety device DC1000 1 Safety Interlock OUT DC1000 2 Safety Interlock IN DC1000 1 Safety Interlock IN 1 HI LCR Pair DC1000 Output 2 LO LCR Pair DC1000 Output 3 DC1000 1 RS232 OUT Master Safety 4 DC1000 2 RS232 IN Slave Device 6 7 Fig 24 Please take care not to insert the safety interlock cable into the RS232 port on the rear of the DC1000 Doing so could damage your instrument USING THE DC 1000 AND A VOLTECH AT3600 WITH A SAFETY SYSTEM When using your DC1000 s with a Voltech AT3600 the AT should be placed at the end of the chain Connect the Safety Interlock OUT of the DC1000 furthest removed from your safety device to the Safety Interlock port of the AT3600 Fig 16 shows this connection 13 25 For optimum safety ease of use test speed Voltech recommends the use of a safety light curtain This provides a light curtain of infrared beams positioned in front of the test environment Once the operator has removed his hand the light curtain can signal that the situation is safe within a few tens of milliseconds However if the operator breaks the light curtain during testing the safety system will open the safety interlocks also within a few tens of milliseconds so that the DC1000 output will cease Voltech can provide a cable for connection between a light curtain and the DC1000 or AT transformer tester The ca
10. C1000 to help you familiarize yourself with the basic operation of the instrument FRONT PANEL DESCRIPTION 1 2 3 4 5 6 7 1 2 A e EE Fig 2 Power Switch Used to turn power to the instrument ON or OFF Output Terminals 4mm safety sockets for connection of the supplied 30A test leads Display 4 character display to indicate the output current in Amps Compliance LED Lights up to indicate an error The display will indicate the error number See the Status Numbers section in this manual for details Rotary Dial Rotates to set the output current Output Enable Button LED Momentary button used to enable or disable the output current A green LED indicates the status of the output The LED lights to indicate that the output is turned on Remote Button Momentary button used to put the instrument into Remote mode in which another DC1000 or a PC can control it A yellow LED indicates that Remote mode is turned on 11 REAR PANEL DESCRIPTION Voltech 1 2 3 4 5 6 Fig 3 RS232 IN Connects either to a PC or to the RS232 OUT port of the DC1000 closest to the controlling DC1000 or a Voltech AT instrument RS232 OUT Connects to the RS232 IN port of another DC1000 in order to control its functionality or connects to another DC1000 or any LCR meter other that a Voltech AT series product Fan Outlet When outputting high currents f
11. C1000 AND A VOLTECH AT3600 WITH A SAFETY SYSTEM ceeneennnnn nnne tenentes 13 USING THE DC1000 WITH AN LCR METER nnne ene e n n a e aa 16 USING MULTIPLE DC1000S IN PARALLEL enne e e n n n n a 17 USING A PC TO CONTROL YOUR DC1000 S rrr nre nnne nr nnn n nene nn 18 USING A PC TO CONTROL YOUR DC1000 S WITH AN RS232 LCR M ETER NOT A VOLTECH AT SERIES PRODUCT nd acu kc ET cg c iuc e ER A D b E ER E i e n on A A iG 19 USING A PC TO CONTROL YOUR DC1000 S WITH AN IEEE 488 LCR M ETER NOT A VOLTECH AT SERIES PRODUCT isi iiu m ird vrai i d i Rn iu d d n n t a 20 USING THE DC1000 WITH VOLTECH AT3600 OR ATI AND OPTIONAL PC rennen nn 21 AT COMPENSATION WITH MULTIPLE DC 1000S eene 22 USING IR ILK HPDC HPAC TESTS HIGH VOLTAGE TEST S eere nnne 23 USING SURG STRW WATT VOC TESTS 23 LSBX INDUCTANCE WITH EXTERNAL BIAS SERIES CIRCUIT eene 23 LPBX INDUCTANCE WITH EXTERNALBIAS PARALLEL CIRCUIT enne 25 ZBX IMPEDANCE WITH EXTERNAL tenente tenete tenete t titt t ttt s 27 5232 COMMUNICATION caccia unas cavet i n i i c ka Cua E x D sa A D RN a D A A RR 30 RS 232 CONNECTION etre Eum eiue 30 belt
12. DC1000 User Manual Precision DC Bias Current Source www voltech com DC1000 PRECISION DC BIAS CURRENT SOURCE USER MANUAL Thank you for choosing the Voltech DC1000 This quality instrument will give you many years of reliable use Should you experience any difficulty during the set up or use of your Voltech product please do not hesitate to contact either your local supplier or one of our main offices Voltech Instruments Inc Voltech Instruments Ltd 11637 Kelly Road Suite 306 148 Harwell Science and Innovation Campus Fort Myers FL 33908 Didcot OX11 0TR U S A UK Tel 1 239 437 0494 Tel 44 0 1235 861173 Fax 1 239 437 3841 Fax 44 0 1235 861174 sales voltech com sales O voltech co uk CONTENTS WARRANTY noso fon fon nn mo a o Sn a Td id dida 5 HEALTH Ge SAFETY cicius ausa sp a n e A E RR v E 6 SAFETY PRECAUTIONS nicis sra as mdr rni e d S n E i e d RR E A a REA A E n 8 WHAT IS THE DOI OOO cna nca n indio t c del A ra c ru ura Sa aC RR 9 WHAT CAN THE DC1000 DO FOR YOU u cccssssssscssssscscsnscececsnanececsuacececsuanececsuacececauanesacauanasecauaneseeauanesecauanesecauanasessn 9 PACKING LIST ov a di i v ER RF E Nr a wda wan Wa a N 10 GETTING STARTED 5 nensi sanscr i i ar a Rr n m n n n we a i E n ima ne 11 SAFETY INTERLOCK i i iac dur ni es a fc E n A Ra n di id ii ii 13 USING THE D
13. IN 8 RTS PIN 7 OV PIN 5 RS232 OUT TX PIN 2 RX PIN 3 CTS PIN7 RTS PIN 8 OV PIN 5 30 RS232 Female RS232 OUT Male 04 01 02 03 04 05 09 08 07 06 06 07 08 9 Commands For your convenience listed below are the RS232 commands you can use to control the DC1000 remotely The baud rate that you should use to communicate with the DC1000 is 9600 with 8 data bits parity is none 1 stop bit and there is hardware flow control Please note that depending on the software that you are using to send these commands to the DC1000 the manner in which carriage returns and line feeds are sent differs In the below commands and If are used to indicate the need for a carriage return or a line feed respectively A line feed can be sent via a terminal emulator by pressing lt ctrl gt and j simultaneously e TURN THE OUTPUT ON OR OFF Command D POWER x lt f gt This command will act the same way as pressing the on off switch on the front panel to tum the unit off If x 0 then the power is turned off Ifx 1 then the power is turned on Messages returned The following messages will be returned Within 100ms an attached unit will respond with 31 COUNT xx cr where xx is the number of units in the chain Within 2 seconds the unit will respond with D STAT O result cr lt f gt where result is a single integer indicating the status of th
14. ase contact your local supplier for details LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from unauthorized modification misuse or operation outside the specification of the instrument No other warranty is either expressed or implied Whilst every care has been taken in compiling the information in this publication Voltech cannot accept legal liability for any inaccuracies contained herein Voltech has an intensive program of design and development that may alter product specification and reserve the right to alter specification without notice and whenever necessary to ensure optimum performance from its product range Because software is inherently complex and may not be completely free of errors you are advised to verify your work In no event will Voltech be liable for direct indirect special incidental or consequential damages arising out of the use of or inability to use software or documentation even if advised of the possibility of such damage All right reserved No part of this publication may be produced stored in a retrieval system or transmitted in any form or by means electronic mechanical photocopying recording or otherwise without prior written permission of Voltech Voltech Instruments Inc 2010 Voltech Part Number 98 100 revision 7 August 2013 HEALTH amp SAFETY Electrical devices can constitute a safety hazard It is the responsibility of the user to ensu
15. at the type of cable required will depend on the type of RS232 connector on your LCR meter See the RS232 Communications Pinning section of this user manual for details if a custom cable is required NOTE See the RS232 communications section for information on USB to RS232 converters 19 Using A PC CONTROL YOUR DC1000 s WITH AN IEEE 488 LCR METER Nor A VOLTECH AT SERIES PRODUCT To use your PC to control your DC1000s and an LCR meter with IEEE 488 communications capability follow the setup in Fig 6 HI LCR Pair DC1000 Output LOLCR Pair DC1000 Output PC RS232 DC1000 1 RS232 IN DC1000 1 RS232 OUT Master DC1000 2 RS232 IN Slave PC IEEE 488 Port LCR Meter IEEE 488 Port Fig 8 Connect your computer s RS232 port to RS232 IN port of the first DC1000 in your chain DC1000 1 using 9 way male to 9 way female null modem cable see Accessories section of this user manual When using an LCR meter without RS232 communications capability the PC you are using must have both an RS232 port to control the DC1000s and an IEEE 488 port to control the LCR meter directly Connect the PC directly to the IEEE port of the LCR meter as illustrated in Fig 6 NOTE See the RS232 communications section for information on USB to RS232 converters 20 USING THE DC1000 WITH A VoL TECH AT3600 OR ATI AND OPTIONAL PC 1 PCRS232 2 DC100
16. ational Instruments run time VISA run visa4 Oruntime exe and follow the on screen instructions Connecting the Equipment The DC1000 software currently supports the control of both the DC1000 bias unit Voltech s AT3600 and ATi and an HP 4284A LCR meter Follow the instructions earlier in this manual for making the appropriate connections The software supports the control of an LCR meter via a GPIB connection The DC1000 software works with all National Instruments GPIB cards Voltech recommends the National Instruments USB to GPIB converter part number GPIB USB HS For information on RS232 support see the RS232 communications section for information on USB to RS232 converters 36 Using the Software To run the software Click Start gt All Programs gt DC 1000 and then select DC1000 Step 1 Select the LCR meter Test Set Up Comms Set Up Select LCR Meter AT3600 5232 ATi RS232 4234A IEEE488 Figure 15 Under Test Set Up you can select LCR meter that will be used to make the inductance measurement Select the LCR meter than you want to use In figure 15 above an HP4284A meter has been selected Step 2 Set up communications Test Set Up Comms Set Up PC to LCR Bridge IEEE 488 2 comms Visa 6 GPIBO 17 INSTR PC to DC1 and or LCR RS232 Comms Visa x TEST COMMS Figure 16 Next set up the communications If you have selected an AT3600 or an ATi
17. ble has been optimized for use with the Banner safety light curtain described below but safety light curtains from other manufacturers may also be suitable To construct a complete safety system you will need e Voltech Safety Interlock Harness provided with your DC1000 14 e Voltech Safety Interlock Cable e Banner Micro Screen safety light curtain 1 x USCD 1T2 Metal Box Controller e 1x USE2424Y1 Yellow Emitter 610mm high with 150mm to 9m range e 1 x USR2424YI Yellow Receiver 610mm high with 150mm to 9m range Source http www banner com e Methods to restrict access to the back of the working area NOTE The Banner part numbers were correct in 2005 You are strongly advised to consult with your safety system supplier before making purchase decisions Similar safety systems are available from many other manufacturers and may be suitable Your DC1000 shipped with a Safety Interlock Override Plug which can be inserted into the Safety Interlock IN port in the place of a safety device DO NOT USE THIS DEVICE WITH DANGEROUS CURRENTS OR VOLTAGES 15 Using THE DC1000 wiTH AN LCR METER The powerful design of the DCI1000 allows it to be used with almost any manufacturer s LCR meter Using the test leads that were supplied with your DC1000 and with your LCR meter it is fast and easy to setup your environment for testing an inductor A Be sure that the power is off to your Voltech DC1000 B Make all the connections
18. cified Specified Specified Specified Specified Specified Specified 7 Select mouse click the button the integration time you require Medium is the default setting Long will give you more stable readings for tighter limits at the expense of test time and Short will test at the maximum speed but may give slightly noisier readings 26 8 Enter the terminal names between which the inductance will be measured By pulling down the menu along side the fill in box you may select the high and low terminals for each test 9 Select mouse click the button the type of limits you require and enter the values Enter a nominal value and then the limits as negative and positive values gt lt Enter minimum and maximum values gt Enter just a minimum value lt Enter just a maximum value 10 Select OK The test specification will then be displayed in the program window ZBX IMPEDANCE WITH EXTERNAL BIAS The Winding Impedance with External Bias test measures the impedance of a selected winding while applying a DC current from the DC1000 through the winding An AC voltage is also applied across the winding from the AT This test can be used with inductors to measure the change in impedance with a bias current On selecting ZBX Impedance with External Bias from the available tests window the following dialog box is displayed 27 Impedance with External Bias m Es E usn
19. e unit and any other unit attached If everything is OK 0 or 1 will be returned If not then a status number will be returned SET DC1000 OUTPUT CURRENT Command D SET level lt gt where level is the demand in milli Amps and can range from 100 to 25000 If multiple units are connected together then the same current will be sent to each unit Messages returned The following messages will be returned Within 100ms an attached unit will respond with D COUNT xx cr lt gt where xx is the number of units in the chain Within 2 seconds the unit will respond with D_STAT 0 status cr lt f gt where status is a single integer indicating the status of the unit and any other unit attached If everything is OK 0 or 1 will be returned If not then a status number will be returned GET THE STATUS OF THE UNIT Command D STAT lt lf gt This command will return the status of the attached DC Bias unit 32 Messages returned The following messages will be returned The unit will respond with D_STAT 0 status cr lt f gt where status is a single integer indicating the status of the unit and any other unit attached If everything is OK O or 1 will be returned If not then a status number will be returned READ THE SERIAL NUMBER Command SER If Messages returned The following will be returned Serialnumber cr lf where serialnumber is the serial number of the DC1000 S
20. eceive your DC1000 the following accessories will also be in the packing box with your new instrument Also given are the Voltech part numbers VPN in case you d like to order spares 1 x DC1000 CD Which contains the demo DC1000 PC software and an electronic version of the user manual VPN 88 297 1x 30A Test Lead set One yellow and one black with clips Each lead is 1 5 meters long VPN 78 114 2 x 9 Way Male Female RS232 Lead This is for connection between your DC1000 and a PC or between your DC1000 and another DC1000 VPN 77 046 1 x Handle Assembly This includes two handles and the fixing hardware needed to attach them to your DC1000 VPN 74 027 1 x Safety Interlock Override Plug This can be used in place of a safety system where there is no risk of dangerous voltages This is only for use when not testing with high currents or voltages We recommend using an approved Safety System at all times Please consult your safety officer VPN 91 265 1 x Product Registration Card Please fill this out and return it to Voltech to help us serve you better VPN 86 203 1x Power Cord VPN 91 019L If there is anything missing from this list when you first unpack your new DC1000 then please contact your supplier for an immediate replacement 10 GETTING STARTED The DC1000 is designed with ease of use and speed of testing in mind Following is a description of the functions on both the front and rear panels of the D
21. erial number returned will always be 12 digits if the queried unit s serial number has less characters then spaces will fill it out to 12 GET THE NUMBER OF UNITS ATTACHED Command COUNT lt lf gt Messages returned The following will be returned within 5 seconds COUNT xx cr where xx is the number of DC1000s in the chain 33 STATUS NUMBERS The DC1000 will retum status numbers either on the front panel display if there is an error or via RS232 if it is requested If the status is an error that is indicated fig 14 as needing to turn off the output then in order to clear the error and try again the output must first be turned off If multiple errors occur either on the same unit or on other units in the chain then a combination of the status numbers will be returned EEE anand af 0K 3 Compiaecmutemr DS Timm EEE Safety interlock rors 16 Tememmeemr 3 Ram 7 Fig 14 lt lt 34 CALIBRATION Voltech recommends that the DC1000 should be calibrated and verified once per year You may retum the instrument to any Voltech authorized service center for fast and accurate calibration Contact your nearest sales office for information on returning product for service ACCESSORIES If you require any cables safety override plugs or fuses VPN 66 052 in addition to those supplied with your DC1000
22. indicated in fig 4 C Power up your DC1000 and turn the output on making sure that the current output is set to zero D Perform compensation on your LCR meter E Turn the DC1000 output off F Using the rotary encoder set your DC1000 output to the desired current G Turn the DC1000 output on H Adjustments can be made to the DC1000 current while the output is enabled using the rotary encoder 3 1 LCR HI Pair TRL 2 LCR LO Pair 1 3 DC1000 HI 4 100010 Fig 4 sure to connect the side of your LCR meter to the same side of the inductor to which the side of your DC1000 is attached and use the opposite side of the inductor to connect the LO sides of both the DC1000 and the LCR meter LCR COMPENSATION WITH A SINGLE DC1000 When compensating your LCR meter for use with the DC1000 always set the current to 0 00 and tum the output ON 16 Using MULTIPLE DC1000s IN PARALLEL You can generate up to 250A as a maximum by connecting up to ten DC1000s together in parallel Either the first DC1000 or a PC or a Voltech AT3600 or ATi can be used to control all the other DC1000s in the chain automatically adjusting their output current to allow you to easily achieve the results you require Everything you need to hookup multiple DC1000s is provided with the units themselves Fig 5 illustrates the connections required 1 HI LCR Pair DC1000 Output 2 LO LCR Pair DC10
23. n ATi you will need to specify the high and low node of the top matrix between which the inductance measurement will be made For the ATi if you are using an LCR fixture then nodes 13 and 15 should be used Step 5 Run the test Before you run the test you need to decide whether you want to save the results to a file This can be done by checking the box under Save Results and then selecting destination location and file The results will be saved in Excel format Also the results will be continuously appended until the Save Results is set to off Figure 19 The test is run by clicking on the Begin button 39 If you click the Begin button with or inappropriate communications set up you will receive an error message and the application will stop The application can be re started by clicking on the right facing Run arrow at the top left Step 6 View the results As the test runs the inductance measurements and the DC current will be added to each step in the results grid An example is shown in figure 20 below Results Saturation Graph EEEEEEEEEEEEEEE un Save Results 5 C 1DC1000 html Figure 20 Once the test has finished you can look at a saturation graph An example is shown in figure 21 40 Results Saturation Graph Clear Results Inductance Value Cur
24. omplies with the limits of BS EN 55022 Class A DECLARATION OF CONFORMITY Manufacturer s Name Voltech Instruments Inc Manufacturer s Address 11637 Kelly Road Fort Myers FL USA declares that the product Product Name Precision DC Bias Current Source Model Number DC1000 conforms to the following Product Specifications Safety BS EN 61010 1993 EMC BS EN 55022 1995 Class A BS EN 50082 2 1992 Supplementary Information 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 Signed for on behalf of Voltech Instruments Inc 22 July 2005 Voltech Instruments Inc has an intensive program of design and development that may alter product specification Voltech Instruments Inc reserves the right to change the product specification at any time and without notice No part of this publication may be produced or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without prior permission of Voltech Instruments Inc O Voltech Instruments Inc 2010
25. re the compliance of the installation with any local acts or bylaws in force Only qualified personnel should install this equipment after reading and understanding this users manual These operating instructions should be adhered to If in any doubt please contact your supplier DANGER Electric Shock Risk Please Note This equipment is supplied under warranty conditions in force at the time of purchase from your supplier Contact your supplier for details Any attempt to disable or modify the unit will render any warranty agreement invalid The contents of this user manual are believed to be accurate at the time of printing The manufacturer however reserves the right to change the content product specification and performance criteria without notice No liability is accepted for the inappropriate negligent or incorrect set up of the instrument by the user either by manual or automated means CHECK YOUR LINE INPUT VOLTAGE SETTING BEFORE CONNECTING TO SUPPLY A 4AT 48 65 2 st 400VA MAX 125V 200 250V JNTINUED PROTECTION 3T FIRE REPLACE THE ONLY WITH THE ED TYPE AND RATING So Fig l Use a flat headed screwdriver to pull the fuse drawer out Rotate the gray voltage selector to select the correct voltage for your location SAFETY PRECAUTIONS e There are no user serviceable parts inside the DC1000 Please retum the unit to a Voltech approved service center for any repairs that may be required
26. rom the DC1000 for extended period of time high temperatures can be produced Please keep this air outlet clear of obstruction to allow the instrument to automatically regulate its internal temperature Safety Interlock IN Connects to a safety device such as a light curtain When the connection is broken the DC1000 ceases to produce any current Safety Interlock OUT Connects to another DC1000 s Safety Interlock IN port If you are using more than one DC1000 in parallel then a single safety device can control each of the units in the chain Power Entry Module Connect the power outlet to this socket Contained within the module are two fuses which should always be replaced when necessary with the same type and rating 4 00A 5X20 T LAG HI BREAK There is also a voltage selector which should always be checked and set if necessary to the correct voltage for your location 12 SAFETY INTERLOCK For the DC1000 to produce any current a safety system is required The DC1000 can be used with and produces high currents therefore Voltech recommends that your always use a safety system when using your DC1000 Consult with your company s safety officer prior to using the DC1000 Your safety system should not allow the operator or near by workers to touch any dangerous part during testing A single safety device can control all the DC1000s in your chain Fig 24 indicates the required connections to connect either a single DC
27. ross and current through the winding are then measured using harmonic analysis The measured voltage is divided by the current to obtain a complex impedance and the inductance is calculated On selecting LSBX Inductance with External Bias Series Circuit or LPBX Inductance with External Bias Parallel Circuit from the Available Tests window a dialogue box will be displayed 25 Inductance with External Bias Parallel Circuit Test Parameters Integration Signal 200 fom CV Short Frequency 50 C Hz kHz MHz Medium Bias Current 12 Long Terminals High T erminal Low Terminal 18 gt Inductance Limits gt lt Minimum 100 Maximum 150 fe nH mH User Offset User Offset Enabled Measure Cancel Fig 12 To program the test 6 Enter the signal frequency and bias current required for the test Note that the signal is normally entered as a voltage by selecting the mV or button but you may optionally enter it as a current by selecting the mA button If in doubt refer to the Test Conditions chapter of your AT user manual Note also that the measure button may be used here as outlined in your AT user manual with the combinations of test parameter specification shown in the following table ES Option 1 Option 2 Option 3 Option 4 Specified voltage Specified current Spe
28. sor Control amp 15 14 Ew Inductance e co N b e o 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 Current in Amps Inductance in mH rio MIN Save Results me Corr Bj C DC 1000 htm Figure 21 The appearance and the position of the cursor can be controlled by using the buttons to the right of the inductance value To enable or disable cursor movement press To change the appearance of the Cursor press The cursor can be either allowed to move freely or locked to the plot The amp button controls this Finally the cursor can be moved around using the arrow buttons S To clear the results from both the results window and the graph window click on the Clear Results button This will also allow you to change the inductance scaling Step 7 Save the results to an Image Save Results ON 4 C DCChoke xis I C 1DC1000 htmi Figure 22 The results from the test can be save to an Excel file by clicking check box under Save results and then selecting the destination file Also a screen shot of the 41 DC1000 software can be saved to HTML file by selecting the name destination of the file and clicking on Save html 42 SPECIFICATIONS Output Capability 0 to 25A in 10mA steps Accuracy on Supplied Current 0 5 of reading 25mA Compliance voltage 5V pk Affect of the DC1000 on Inductance Readings The affect
29. the DC1000 has on an inductance reading is dependant on the test Voltage and frequency Fig 17 should be used to determine the affect for a particular test 0C 1000 Error Current Error Current 1 1 i 1 1 101000 10 000 00 100 000 00 1 000 000 t0 10 020 000 00 Froquemcy HO Fig 23 Example Measuring the inductance of a 2uH inductor at 0 2V 100kHz Z 1 25660 0 2V i 159 155 From fig 23 the error current 0 45uA mV 100kHz Which for a signal of 0 2V 90u A Error in measurement 90uA 159 155mA 0 057 Environment Temperature 5 to 40 C operating Humidity 10 to 80 RH non condensing Power Supply to Case 2 9kV DC for 1 minute Power Requirement 100 125 200 250 48 65Hz 400VA Max 43 Supply Voltage Input Voltage 100 125V 200 250V AC 48 65Hz Input Power 400 Fuse 4AT Environment Temperature 5 to 40 C operating Humidity 10 to 80 RH non condensing Dimensions Height 88mm Width 475mm Length 255mm Weight 10kg Interfaces RS232 connection to ATI or AT3600 Transformer Testers Safety Interlock Protection for operators from back EMF when interlock connected to safety cage Variable Speed Cooling Fan Runs fan at variable speed dependent on load and temperature for minimal noise 44 EMC COMPLIANCE The DC1000 c
30. there will be only one connection item to fill in If you have selected to control an LCR meter via GPIB then the device will need to be selected In the example shown in figure 16 the HP4284 is on GPIB address 17 and the DC1000 is on comm port 6 You can see what comms ports are available by opening the Device Manager on your PC To test that the communications are working correctly click on Test Comms The screen shown in figure 17 will appear To run the communications test click on the Identify Connected Items button If the comms have been set up correctly then the 37 identifier string will be displayed If comms are not working then an error message will be displayed with information on what may be wrong Figure 17 Clicking on the Saturation curve tab while in Comms Set up with the Test Comms button pressed will retum you straight back to the screen shown in figure 177 Step 3 Set up the bias current Next the minimum and maximum DC current needs to be specified along with the number of steps and the number of bias units attached The increment of each step will be the difference between the maximum and minimum current divided by the number of steps minus 1 38 HP 4284A 488 Figure 18 For example if figure 18 the step size would be 0 1A Step 4 Set up the inductance measurement Next set up the inductance test voltage and frequency Also if the LCR meter is an AT3600 or a
31. w many DC1000s you have connected one test purchase will cover all DC1000s attached to your AT Contact your local Voltech supplier for details on attaining these tests AT COMPENSATION WITH MULTIPLE DC 1000S When compensating your Voltech AT product for use with the DC1000 s 1 Measure the open circuit inductance without the DC1000s connected by performing AT measure with the Editor Note this inductance value 2 Connect your DC1000 s to the device under test with all output turned on and current set to zero 3 Subtract the inductance value now from the inductance value taken without the DC1000 s connected Use this value as the negative offset when running an AT program 22 UsING IR ILK HPDC HPAC TESTS HIGH VOLTAGE TESTS Voltech AT3600 or ATi programs that include any of these tests should be connected such that the LO winding is the one that is connected to DC1000 output Fig 10 below illustrates this setup INCORRECT CONNECTIONS TO THE DC1000 MAY CAUSE DAMAGE DC1000 Output HI DC1000 Output LO Hi Pot Hi Pot LO Bmw m Fig 10 USING SURG STRW WATT VOC TESTS These tests must not be used on any winding on a component to which a DC1000 is attached The surge voltage will effectively test the DC1000 not the winding and this may cause damage to your DC1000 AT TESTS e LSBX INDUCTANCE WITH EXTERNAL BIAS SERIES CIRCUIT The inductance of a transformer winding while an e
32. xternal 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 stabilize An AC voltage is applied across the selected winding the voltage across and current through the winding is then measured using harmonic analysis The measured voltage is divided by the current to obtain a complex impedance and the inductance is calculated 23 On selecting LSBX Inductance with External Bias Series Circuit or LPBX Inductance with External Bias Parallel Circuit from the Available Tests window a dialogue box will be displayed Inductance with External Bias Series Circuit Test Parameters Integration Signal 100 fe Short Frequency 100 C Hz kHz MHz Medium Bias Current 5 Long Terminals High Terminal Low Terminal Inductance Limits 8 gt lt Nominal 2 nH fo mH Negative 5 Positive 5 User Offset User Offset Enabled Fig 11 To program the test 1 Enter the signal frequency and bias current required for the test Note that the signal is normally entered as a voltage by selecting the mV or button but you may optionally enter it as a current by selecting mA button If in doubt refer to the Test Conditions chapter of your AT user manual Note also that the measure button may be used here as outlined in your AT
Download Pdf Manuals
Related Search