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IET 7600 Plus Precision LCR Meter Manual

1. 2 9 10 Set Time Date Wed Aug 19 10 30 10 2008 TO CHANGE TIME PRESS T KEY TO CHANGE TIME PRESS D KEY TO RETURN PRESS lt MENU gt D Figure 49 Set Time Date Allows resetting of time and date into unit memory This is used as the basis for the elapsed time counter and stored calibration date 61 7600 Plus LCR Meter 151053 A4 T time is entered in HOURS up to 2 digits 0 through 23 MINUTES up to 2 digits 0 through 59 SECONDS upto2 digits 0 through 59 D date is entered in MONTHS up to 2 digits 1 through 12 DAYS up to 2 digits 1 through 31 YEARS 4 digits 1992 through 2037 2 9 11 Usage Cal Date THE TOTAL OPERATING TIME FOR THIS INSTRUMENT IS 1205 50 hours THIS INSTRUMENT WAS CALIBRATED ON 10 15 2008 AT 11 25 10 cal HIT lt MENU gt KEY TO CONTINUE Figure 50 Usage Cal Date When selected indicates the total elapsed time in hours that the unit has been powered up and the date of last calibration The elapsed time is from the moment of initial use and may show some time when shipped from the factory The calibration date is retained in instrument memory unit the unit is re calibrated and then it is updated When cal data is selected the calibrated values are shown as entered from the Report of Calibration provided with the 7000 09 Calibration Kit previously used 2 9 12 Set Contrast HIT ARROW KEYS TO CHANGE THE DISPLAY CONTRAST HIT lt ENTER gt TO ACCEPT THE CONTRAST SETTING F
2. HARDWARE TIMER FAILURE REBOOT Hardware malfunction during power up HIGH LIMIT LESS THAN LOW LIMIT Limits incorrectly set INTERNAL HARDWARE FAILURE REBOOT Hardware malfunction during power up INVALID FREQUENCY SELECTED Select a valid frequency INVALID RANGE SELECTED Select another range LOW BATTERY VOLTAGE Memory backup battery indicates low voltage setups and instrument zero could be lost MAXIMUM OF SETUPS REACHED Maximum number of files have been stored 90 7600 Plus LCR Meter 151053 A4 NO IEEE 488 INTERFACE Unit does not include IEEE 488 NO INTERLOCK SIGNAL Open interlock connection at rear panel I O Port NO PASSWORD ENTERED Password entry canceled re enter NO ZERO DATA FOUND Unit requires zeroing PASSWORD DID NOT MATCH Incorrect password entered PASSWORD NOT SAVED IN RAM Error trying to save password repeat PASSWORD VERIFICATION FAILURE Wrong password entry for verification PRI amp SEC MISMATCH SET TO AUTO Check parameter selection PRIMARY AUTO CAN T UPDATE AUTOACC Check parameter selection PRIMARY AUTO SECONDARY IGNORED Check parameter selection PRINTER ERROR CHECK PRINTER Printer error PRINTER OUT OF PAPER Printer out of paper QUICK OPEN SHORT INVALID RE ZERO REMOTE COMMAND INVALID IEEE or RS232 command is incorrect for example to set frequency use FREQuency REMOTE COMMAND PARAMETER INVALID IEEE or RS232 parameter is incorrect for example frequency p
3. lt gt tab low limit tab or tab tab high limit tab lt or tab tab total tab lt gt terminated by a linefeed Bins 11 15 lt bin gt lt tab gt lt gt lt tab gt lt bin description gt lt tab gt lt total gt lt tab gt lt gt terminated by a linefeed Last Line lt totals gt lt tab gt lt pass gt lt tab gt lt gt lt tab gt lt fail gt lt tab gt lt gt lt tab gt lt gt lt tab gt lt total gt terminated by a linefeed LOADFEtch Returns load correction status Valid measured primary amp secondary values or Invalid IDN Returns instrument identification IET Labs 7600Plus xx xx software version ESR2 x denotes serial number up to 10 digits Returns the read of the event status register STB Returns the read of the status byte register ZESE Returns the read of the event status enable register FSRE Returns the read of the service request enable register ESE Set the event status enable register value SRE Set the service request enable register value RST Reset the buffer HIST Self test query CLS Clear standard event status register 76 7600 Plus LCR Meter 151053 A4 Note Remote command can start with or without symbol for compatibility 2 13 Formats IEEE 488 2 enables remote programming of all instrument functions measurement conditions and comparator settings etc Outputs include
4. LCD display keypad PC104 microprocessor module and power supply In addition there is the IEEE 488 card discussed briefly below 4 1 Basic Instrument Architecture 4 1 1 Processor Board The processor board provides the basic control for the 7600 Plus and mimics the IBM PC architecture Besides the central processing unit and memory modules it includes SMX RTOS keypad USB and RS232 ports The RS232 port is connected to its rear panel connector by a cable The processor board is stacked on the Main Board The processor board can have the IEEE 488 card stacked on it 4 1 2 Power Supply The power supply assembly consists of two modules a 3V 5V 12V module towards the back of the instrument and a 12V module towards the front The 3V 5V 12V supplies power to all digital functions The 12V module supplies power to the analog section of the instrument board 4 1 3 LCD Display Keypad Panel The front panel user interface is comprised of a molded silicon rubber keypad that actuates a membrane switch assembly The keypad is environmentally sealed designed for long life with all keys providing tactile feedback to the operator The 2 1 2 x 4 3 4 LCD is a high resolution graphic display with on off back light for visual clarity Both keypad and display are connected to the instrument I O board via ribbon cables 93 7600 Plus LCR Meter 151053 A4 4 2 7600 Plus Instrument Module The QT 1 Instrument Board QT0807 instrument board used
5. PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT 4 7600 Precision LCR Meter User and Service Manual IET Labs 7690 Plus Precisie LOA mn raden LE T ietlabs IET IET LABS INC don TEL 516 334 5959 e FAX 516 334 5988 o n ietlabs IST l ET LAB S l NC E don TEL 516 334 5959 FAX 516 334 5988 o n ietlabs IST l ET LAB S l NC E don TEL 516 334 5959 FAX 516 334 5988 o n ietlabs IST l ET LAB S l NC E don TEL 516 334 5959 FAX 516 334 5988 PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT 4 7600 Precision LCR Meter User and Service Manual Copyright 2014 IET Labs Inc Visit www ietlabs com for manual revision updates 7600 im January 2014 e T _ lt A ietlabs TEL 516 334 5959 FAX 516 334 5988 PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT 4 O T ietlabs TEL 516 334 5959 FAX 516 334 5988 WARRANTY We warrant that this product is free from defects in material and workmanship and when properly used will perform in accordance with applicable IET specifications If within one year after original shipment it is found not to meet this standard it will be repaired or at the option of IET replaced at no charge when returned to IET Changes in this product not approved by IET or application of voltages or currents greater than those allowed by the specifications shall void this warranty IET shall not be liable f
6. 000000 sequence sec param 0 000000 sequence bias 0 000000 sequence ac signal type 1 000000 sequence ac signal value 0 000000 sequence delay 0 000000 sequence range 0 000000 sequence range relay 0 000000 sequence relay 2 0 000000 sequence relay 3 0 000000 sequence var relay 1 000000 sequence stop on fail 0 000000 sweep 0 000000 sweep parameter 10 000000 sweep begin 1000 000000 sweep end 0 000000 sweep step 0 000000 sweep result format 0 000000 median 40 151053 A4 printed only if sequence enabled 7600 Plus LCR Meter 1 000000 25 000000 50 000000 1 000000 1000 000000 49 000000 5 000000 4 000000 25 17072 Q 1947500 0 170725 50 194742 0 000000 0 000000 1 000000 ENDHEADER 151053 A4 correction correction primary nominal correction secondary nominal correction status correction frequency correction range correction primary parameter correction secondary parameter correction measured primary correction measured secondary correction primary correction correction secondary correction enhanced distortion slockout sbacklite Cs 9 69573e 09 F DF 0 0052921 Bin 1 Cs 9 69645e 09 F DF 0 0052307 Bin 1 Cs 9 69575e 09 F DF 0 0052404 Bin 1 Cs 9 69583e 09 F DF 0 0052983 Bin 1 Cs 9 69698e 09 F DF 0 0053328 Bin 1 The number of measurement results that can be stored is dependent on available memory and length of the data strin
7. 30 lt Z lt 80kQ 100mV lt programmed V lt 1V or 100mV lt programmed I x Z 1V 10 Hz to 2 MHz Resolution 0 1 Hz from 10 Hz to 10 kHz 5 digits gt 10 kHz 4 digits gt 100 kHz Accuracy 0 01 0 10 Hz l At optimum test signal levels optimum DUT value and without calibration uncertainty error Instrument accuracy reduced from nominal specifications when using 7000 accessory fixtures and cables Best accuracy requires geometric consistency between that used during open short zeroing and that used on fixtures and cables during actual measurement Consistency may be difficult when using unshielded Kelvin clip and Tweezer type connections vil 7600 Plus LCR Meter Measurement Speed Ranging Source Impedance Trigger AC Test Signal Voltage AC Test Signal 151053 A4 Fast Accuracy 120 meas sec Medium Accuracy 16 meas sec 8 meas sec below 150kHz Slow Accuracy 2 meas sec 1 meas sec below 150kHz may be longer depending on test conditions amp frequency Automatic Range Hold or User Selectable 250 4000 6 4 kO or 100 kO measurement range dependent Internal automatic External via handler RS 232 or IEEE 488 2 interfaces 20 mV to 5 0 V open circuit in 5 mV steps 500kHz 20 mV to 1 0 V open circuit in 5 mV steps 2500kHz to lt 1MHz 20 mV to 0 5 V open circuit in 5 mV steps gt 1 MHz Accuracy 5 1 mV lt 100kHz 10 1 mV 100kHz to 500kHz 20 1 mV 500
8. 31 grounded BUSY Bin Data Oo Xo o Data Valid 2nd Test Previous Data Valid 10 us min End of Measurement Figure 52 I O Interface Timing 65 7600 Plus LCR Meter 151053 A4 Test Initiation A test is initiated by activating either the START or TRIG inputs The BUSY line is asserted low to indicate that a measurement is in progress The EOT line is de activated asserted high to indicate that the end of the test had not been reached Binning data from the previous test is still valid During a Test The START or TRIG inputs are released and return to their inactive state The BUSY line is held low to indicate the 7600 Plus is making a measurement The EOT line is held high inactive until the 7600 Plus is done making a measurement and bin data is valid End of Test The BUSY line is returned to high impedance de activated to indicate that the 7600 Plus is done making a measurement and to signal the automatic component handler to advance the DUT to the binning station and insert the next DUT Simultaneously the EOT line is asserted low to indicate that the test is completed bin data lines and measurement data are valid and can be read from the IEEE or RS 232 ports Data must be valid a minimum of 10us before the trailing edge of BUSY and EOT All data for the current test is valid and will remain valid until the end of the next test This includes comparator bins 1 10 primary
9. 874 Connectors 89 7600 Plus LCR Meter 151053 A4 3 Error Messages AC CURRENT ERROR SET TO 250uA AC current level improperly set AC VOLTAGE ERROR SET TO 1V AC voltage level improperly set BAD CALIBRATION CODE ENTERED Calibration code incorrectly entered BAD CALIBRATION DATA Calibration incorrect re calibrate BAD OPEN CALIBRATION DATA Repeat Open test BAD SETUP DATA READ FROM MEMORY Setup data incorrect reload BAD SHORT CALIBRATION DATA Repeat Short test BIN CHECKSUM ERROR TOTALS SET TO 0 Bin count incorrect CRC ERROR ON USB Stored setup lost or corrupt cyclic redundancy check CURRENT MODE BIAS SET TO OFF DISK WRITE PROTECT ERROR Flash drive is write protected ELAPSED TIME ERROR SET TO 0 Elapsed time is incorrect and has been set to zero battery for non volatile memory may be defective ERROR DURING CALIBRATION Calibration incorrect re calibrate ERROR DURING OPEN CALIBRATION Repeat Open test ERROR DURING SHORT CALIBRATION Repeat Short test FAILURE SEE DOCUMENTATION Hardware or software failure 1 99 list not included in this manual FILE ACCESS VIOLATION File selected from flash drive is Read Only FILE DOES NOT EXIST File name incorrect FILE EXISTS File already exists under the chosen name FLASH DRIVE NOT READY Flash drive defective or not inserted GENERAL FAILURE USB Flash drive defective or not inserted HANDLER PORT FAILURE I O port malfunction during power up
10. Any command if desired to implement Fetch This will continue calibration Connect the Short Circuit Ensure that the short is connected to the instrument CONTINUE Complete for RS232 only Wait for SRQ OPC operation complete IEEE only SHORt Perform short circuit calibration The procedure for performing a remote short is as follows IEEE wait for SRQ OPC to indicate continue Send Send Receive Send Receive Any command if desired to implement Fetch This will continue calibration Connect the Short Circuit Ensure that the short is connected to the instrument CONTINUE Complete for RS232 only Wait for SRQ OPC operation complete IEEE only OPEN Perform open circuit calibration The procedure for performing a remote open is as follows IEEE wait for SRQ OPC to indicate continue Send Send Receive Send Any command if desired to implement Fetch This will continue calibration Connect the Open Circuit Ensure that the open is connected to the instrument CONTINUE 13 7600 Plus LCR Meter FULL next 4 standards 74 Receive 151053 A4 Complete for RS232 only Wait for SRQ OPC operation complete IEEE only Perform full calibration The procedure for performing full calibration is as follows IEEE wait for SRQ OPC to indicate continue Send Send Receive Send Any command if desired to implement Fetch This will continue calibration Connect the 374 Q Standard Ensu
11. Bin Low LIMIT High LIMIT 110 00 k 120 00 k 130 00 k 140 00 k 150 00 k 160 00 k 170 00 k 180 00 k 190 00 k 120 00 k Figure 29 Absolute Limit A 151053 A4 Once the limit of choice is selected by UP DOWN LEFT RIGHT arrow and ENTER the numerical value can be entered directly as shown below entry is 130 in this example Y Absolute Limit 90 00 k 100 00 k 110 00 k 120 00 k 140 00 k 150 00 k 160 00 k 170 00 k 0 180 00 k OONOOUBRWNDN Figure 30 Absolute Limit Numeric Entry Bin Low LIMIT High LIMIT 110 00 k 120 00 k 130 00 k 140 00 k 150 00 k 160 00 k 170 00 k 180 00 k 190 00 k 200 00 k 4 Then arrow up or down to select units from those available k is chosen in this example Absolute Limit 90 00 k 100 00 k 110 00 k 120 00 k 140 00 k 150 00 k 160 00 k 170 00 k 0 180 00 k OONOOBWDNDN Figure 31 Absolute Limit Engineering Units Bin Low LIMIT High LIMIT 110 00 k 120 00 k 130 00 k 140 00 k 150 00 k 160 00 k 170 00 k 180 00 k 190 00 k 120 00 k ay y Press ENTER to finalize the entry the UP DOWN LEFT RIGHT arrow to choose the next limit to be entered or changed 45 7600 Plus LCR Meter 151053 A4 46 7600 Plus LCR Meter 151053 A4 2 7 19 Tolerance Percent Tolerance Percent selection allows for entry of both upper and lower limit in terms of percent below or above an entered nominal both must be entered When l
12. Mode Accuracy 2 ake A Aal 0674 0 554 24 Yo ef 2 es Y A 05 K 0 05 V 4 Vig An nominal accuracy 0 05 NOTE Accuracy given by the equations is the measurement accuracy relative to calibration standards Total accuracy equals the relative measurement accuracy plus the calibration uncertainty of the calibration standards 2 9 7 Open Short The zeroing process automatically measures stray parameters and retains the data which is used to correct measurements so that results represent parameters of the DUT alone without test lead or fixture capacitance Measurement accuracy is specified at the end of the IET Labs one meter cable 7000 01 Open and short circuit zeroing should be done at the end of this cable In order to maintain instrument accuracy with other cable lengths the instrument should be re calibrated using the IET Labs 7000 09 Calibration Kit and the alternate cable Zeroing is recommended at the start of each work day or more often if leads fixture or test configuration to the DUT is changed It is not necessary to re zero if the test frequency is changed It is important to note that anytime the instrument is zeroed it is done at a test voltage of 1 volt and frequencies of 10 50 100Hz 1 5 10 25 50 100 250 500 750kHz 1 1 25 1 5 1 75 and 2MHz Once Open Short is selected in the menu and Enter key pressed the operator is prompted by instructions on the display for short or open zeroing as sho
13. None Frequency 1 kHz AC Test Signal 1V DC Bias Voltage Off Range Hold Off Range Locked 0 Measurement Accuracy Medium Delay Time 0 to Average Contact Check Off Under I O Menu Display Type Measured Parameters Nominal Value None Result Format Scientific 11 7600 Plus LCR Meter 151053 A4 Trigger External Handler Off RS 232 Enabled IEEE Disable Print Results Off Results to USB Off Under Analysis Menu Binning None Test Sequencing Off Parameter Sweep Off Median Off Distort Detect Off Load Correction Off Under Utilities Menu Lockout Off Backlite On 2 6 Menu Functions All programmable functions of the 7600 Plus are controlled by easy to use menu displays The user enters the menu mode by selecting the MENU key which calls up four top level menus Setup I O Analysis and Utilities Each one of these is comprised of a sub menu list whose functions are described in detail below Finding ones way around the menu listing is accomplished using the UP DOWN RIGHT and LEFT arrow keys as indicated on the adjacent LCD display A highlighted menu function can be controlled by selecting the ENTER key making the desired entry or selection and pressing ENTER again to implement 12 7600 Plus LCR Meter 151053 A4 2 6 1 Setup Menu Analysis Utilities Primary Parameter Secondary Parameter Frequency 1 0000 kHz AC Test Signal gt gt DC Bias V
14. PE 7 10000 LABS 5 10pF 1000 100 100pF i0 1 0nF p 10nF ii 100nF 0 01 1 0uF 10 100 1000 10000 100000 Frequency 1000000 10000000 Figure 14 Capacitive Reactance vs Frequency 25 7600 Plus LCR Meter 151053 A4 Inductive Reactance XI 2pifL 1000000000 10H 100000000 4H 10000000 m 1000000 Sont 100000 E Proy 100uH 6 1000 10uH 100 1uH 10 100nH 1 10nH 0 1 0 01 10 100 1000 10000 100000 1000000 10000000 Frequency Figure 15 Inductive Reactance vs Frequency Setup Analysis Utilities Accuracy Fast Medium Slow HIT MENU TO RETURN TO MAIN MENU Figure 16 Measurement Accuracy 26 7600 Plus LCR Meter 151053 A4 Allows selection of Measurement Accuracy of Fast Medium or Slow There is a tradeoff of measurement speed vs accuracy The meter will make a more precise and accurate measurement at a slower rate The speed accuracy tradeoff is as follows e Fast Measurement time of 8 333 ms or one frequency cycle whichever is longer nominal accuracy of 0 5 e Medium Measurement time is 125 ms nominal accuracy of 0 25 Note Above 150kHz Measurement time is 62 5 ms e Slow Measurement time is 1 sec nominal accuracy of 0 05 Note Above 150kHz Measurement time is 0 5 s NOTE Measurement times may be longer depending on frequency and other test conditions One complete cycle of stimulus voltage is required for measurement For example at 10 Hz 100 ms 1
15. T2 5A 250V 5x20mm IET Labs PN 520049 for 115 or 220V source The 7600 Plus is factory shipped with the 2 5A fuse in place The instrument can be damaged if the wrong fuse is installed To change the fuse proceed as follows Procedure 1 Make sure the unit has been disconnected from its ac power source for at least five minutes before proceeding 7600 Plus LCR Meter 151053 A4 2 Remove the fuse drawer by inserting a small flat head screwdriver behind the small tab to force the draw outward Refer to Figure 4 3 Once the fuse drawer has been completely removed from the instrument remove the clear fuse tray from the drawer by lifting upward slightly on the long narrow black locking tab This will allow the fuse tray to be removed from the fuse drawer This tray contains the active fuse left side secured by holder and spare fuse on the right side if present 4 Remove the active fuse from the holder by prying upward using a small flat head serewdriver Insert the replacement fuse into the fuse holder 5 Once the fuse has been installed in the holder and spare fuse if desired installed in the right side of the tray insert the tray back into the fuse drawer push in and lock The two silver contacts on the fuse tray should be positioned towards the outside 6 Once the fuse tray has been installed in the draw reinstall the fuse drawer back into the instrument ac inlet module push in and lock Active fuse in holder Contacis t
16. in the Model 7600 Plus Precision LCR Meter is the heart of the measurement system There are five major parts to this board sine wave generator voltage detector channel current detector channel A D converter and Digital Signal Processor Each is discussed below in brief 4 2 1 Sine Wave Generator All devices under test are tested by applying a sine wave of voltage or current The sine wave is generated by an IC using the Direct Digital Synthesis technique This allows generation of all frequencies from 10 Hz to 2 MHz with a high level of resolution 4 2 2 Voltage Detector Channel The sine wave test signal is applied to the unknown through the IH and IL leads causing a voltage to appear across the unknown This voltage Ex is measured by the PH and PL leads filtered and amplified according to its level and presented to one channel of the Dual A D converter 4 2 3 Current Detector Channel The current flowing through the unknown is applied to a transadmittance amplifier with an internal standard in the feedback path This arrangement causes a voltage to be generated across the standard resistor proportional to the current This voltage is also filtered and amplified and presented to the second channel of the A D converter 4 2 4 A D Converter The two signals representing voltage across and current through the unknown are digitized by a dual 18 bit A D converter Samples are taken synchronously with the digital generatio
17. symbol ISO 3864 when it is necessary for the user to refer to the instruction manual in order to prevent injury or equipment damage Product marked with this symbol IEC417 indicates presence of direct current gt Product will be marked with this symbol ISO 3864 when voltages in excess of 1000V are present di D Indicates the grounding protect terminal which is used to prevent electric shock from the leakage on chassis The ground terminal must connect to earth before using the product Warning Procedure can cause hazard to human if the warning is neglected Caution Avoid product misuse It may cause damage to the product itself and the DUT if the caution is neglected Note Important information or tips for the procedures and applications Warning Signal During Testing DANGER HIGH VOLTAGE TEST IN PROGRESS UNAUTHORIZED PERSONS KEEP AWAY 1 6 4 Disposal Do not dispose of electrical appliances as unsorted municipal waste use separate collection facilities Contact your local government for information regarding the collection systems available If electrical appliances are disposed of in landfills or 1 M dumps hazardous substances can leak into the groundwater and get into the food chain damaging your health and well being When replacing old appliances with new one the retailer is legally obligated to take back your old appliances for disposal 7600 Plus LCR Meter 151053 A4 2 Operation On
18. to250Vac 47 63 Hz 100W maximum Charged Capacitor Protection V8 C for Vmax lt 250 V V2 C for Vmax lt 1000V C Capacitance in farads of the device under test Measurement Delay programmable from 0 1000 ms in 1 ms steps Measurement Averaging programmable from 1 1000 Median value Mode Open and Short Circuit Zeroing at Multiple Frequencies Power Fail Protection setting results amp calibration data stored Storage and Recall Internal Memory USB ASCII format Self Test Routines at Power up Self Accuracy Calibration and Display Contact Check 151053 Instruction Manual Power Cable Calibration Certificate and Flash 118 USB Memory Stick Ordering Information Catalog No IX 7600 Plus LCR Meter 151053 A4 7600 Plus Precision LCR Meter 7600 Options amp Accessories Rack Mount Kit 7000 00 BNC Cable Set 1 meter 1689 9602 BNC Cable Set 2 meters 1689 9602 2 Kelvin Clip Leads 1700 03 Alligator Clip Leads 7000 04 Chip Component Tweezers 7000 05 Low Voltage Axial Radial Lead Component Test Fixture 7000 06 Low Voltage Chip Component Test Fixture 7000 07 Calibration Kit 7000 09 RS232 Cable 630158 USB to RS232 Adapter 630250 7600 Plus LCR Meter 151053 A4 1 Introduction 1 1 Unpacking and Inspection Inspect the shipping carton before opening if damaged contact the carrier s agent immediately Inspect the instrument for any damage If the instrument appears damaged or fails to meet specifications notify IET Labs or its l
19. 0 Figure 3S BNC Cables aaa en 81 Fipgre 56 Kelvin Clip Leads 82 Figure 57 Kelvin Test Leads Open Short Zeroing ans ennv ere eenneeenneenseerseeeeneeenn 83 Figure 58 Alligator Clip Leds anasheed ee nae 83 Figure 59 Chip Component Tweezers assess ias 84 Figure 60 Low V Axial and Radial Lead Component Test Fixture nn 85 Figure 61 Low V Chip Component Test Potute rss Ya a cee 86 Fig re A TEN ta ta a al a a e l a kb a en a A AA a A ati 88 Figure 63 Connection to 874 Connectors wassers s 89 vi 7600 Plus LCR Meter Specifications Measurement Parameters Measurement Ranges Measurement Accuracy Test Frequency 151053 A4 Capacitance Cs Cp Inductance Ls Lp Resistance Rs Rp Dissipation DF and Quality Q Factors Impedance Z Admittance Y Phase Angle 0 Equivalent Series Resistance ESR Conductance Gp Reactance Xs Susceptance Bp Any two parameters measured and displayed simultaneously Note s series p parallel ESR equivalent to Rs IZ R X 000 0001 mQ to 99 99999 MO Y G B 00000 01 uS to 9 999999 MS C 00000 01 fF to 9 999999 F L 0000 001 nH to 99 99999 H D 0000001 to 99 99999 Q 0000001 to 999999 9 Phase Angle 180 0000 to 179 9999 degrees Delta 99 9999 to 99 9999 Fast Medium Slow LCR 0 5 0 25 0 05 DF 0 005 0 0025 0 0005 0 25 x normal accuracy with Load Correction implemented and compared to user supplied standard In a range of
20. 0 sequence relay 3 0 000000 sequence var relay 1 000000 sequence stop on fail 0 000000 sequence status 1000 000000 sequence frequency 0 000000 sequence pri param 0 000000 sequence sec param 0 000000 sequence bias 0 000000 sequence ac signal type 1 000000 sequence ac signal value 0 000000 sequence delay 0 000000 sequence range 0 000000 sequence range relay 0 000000 sequence relay 2 0 000000 sequence relay 3 0 000000 sequence var relay 1 000000 sequence stop on fail 0 000000 sequence status 1000 000000 sequence frequency 0 000000 sequence pri param 0 000000 sequence sec param 0 000000 sequence bias 0 000000 sequence ac signal type 1 000000 sequence ac signal value 0 000000 sequence delay 0 000000 sequence range 0 000000 sequence range relay 0 000000 sequence relay 2 0 000000 sequence relay 3 0 000000 sequence var relay 1 000000 sequence stop on fail 0 000000 sequence status 151053 A4 39 7600 Plus LCR Meter 1000 000000 sequence frequency 0 000000 sequence pri param 0 000000 sequence sec param 0 000000 sequence bias 0 000000 sequence ac signal type 1 000000 sequence ac signal value 0 000000 sequence delay 0 000000 sequence range 0 000000 sequence range relay 0 000000 sequence relay 2 0 000000 sequence relay 3 0 000000 sequence var relay 1 000000 sequence stop on fail 0 000000 sequence status 1000 000000 sequence frequency 0 000000 sequence pri param 0
21. 0 00 k 7 00 10 00 Sequential limits are a natural choice for sorting by absolute value Sequential limits for three bins are illustrated below It should be noted that the bins do not necessarily have to be adjacent Depending on the specified limits for each they can be overlapping adjacent or even isolated gaps from each other Any overlap is assigned to the lower numbered bin and a gap would be assigned to the overall fail bin Measured Value Axis 85 00 kQ 90 00 k Q 100 00 kQ 120 00 kQ Bin Low LIMIT High LIMIT 1 85 00 k 90 00 k 2 90 00 k 100 00 k 3 100 00 k 120 00 k 2 7 18 Absolute Limit Absolute limit selection allows for entry of both upper and lower limit for each bin in absolute value Valid range for each is 108 to 109 If zero is entered for Low or High the previous value is cleared and that bin disabled When limits are entered in terms of absolute value the same limits will automatically be shown in terms of percent on the Tolerance Percent Display This automatic calculation should be used cautiously imprecise displays and missed bin assignments are possible at the range extremes Arrow up down left to right to select the limit of interest in either the low or high limit column as shown below low limit for bin 5 is chosen in this example 44 7600 Plus LCR Meter Absolute Limit 90 00 k 100 00 k 110 00 k 120 00 k 140 00 k 150 00 k 160 00 k 170 00 k 0 180 00 k OONOMOUJHROQON
22. 0 Plus measurement terminals as well as the and polarity of DC bias voltage when applied 2 14 5 Chip Component Tweezers 7000 05 The 7000 05 Chip Component Tweezers can handle small unleaded chips or SMDs surface mounted devices passive sensors and components for testing on the 7600 Plus A four terminal Kelvin connection extends to the tip of the tweezers where the measurement becomes two terminal therefore series impedance of the connecting cables and internal tweezer connections do not affect the measurement The small amounts of residual tip resistance and inductance can be automatically corrected by using the 7600 Plus shorting function with the tips pressed together Guard shields between the tweezer blades minimize capacitance between them A correction for this small capacitance can be made using the 7600 Plus open circuit test with the tips held at a spacing equal to that of the component s contact spacing LD Bk or labeled or labeled Figure 59 Chip Component Tweezers For this accessory an additional accuracy for parameters listed must be added to the standard instrument accuracy as defined by AutoAcc C 1 5 pF R 10 mQ L 100 nH Q for R gt 100 Q 9 Freq R 10 12 ppm for R lt 100 Q R Freq 10 6 ppm Measurement accuracy is very sensitive to connection geometry The same connection geometry must be used for open short compensation as for connection to the device under test C
23. 60 pA if F lt 200 kHz and I lt 160 pA 33 and K 2 56 mA if I 2 56 mA 49 and K 40 mA if I gt 2 56 mA value for K required in calculation of R3 below z DE Vi 10Vif V lt 0 1V Vif V gt 0 1 and 1 01 22 7600 Plus LCR Meter 151053 A4 V S if gt 1 01 V programmed ac test voltage Z impedance value Z in ohms of the device under test where R2 0 if D Z gt 0 25 1 if D Z gt 0 1 2 if D Z gt 0 025 where R3 OQifI K 0 25 4ifI1 K gt 0 1 8ifI K 0 025 Note above 1 5 MHz R2 and R3 are always 0 zero AC Signal Current Mode Measurement Range s Determine Range where R R R1 R2 R3 where R 33 and Rs 4000 if I lt 2 2mA 49 and Rs 250 if I gt 2 2mA I programmed ac test current where R1 0 and Vs 1 0 if Eur or Eper lt 1 0 100 and Vs 5 0 if Epyr or Epgr gt 1 0 Epur I Z this value must be less than 3 0 reference paragraph 2 6 2 4 AC Test Signal 23 7600 Plus LCR Meter 151053 A4 Eper D Rs Z impedance value Z in ohms of the device under test refer to Figures 2 11 and 2 12 to help determine Z in terms of capacitive and inductive reactance where R2 0 if Epur Vs gt 0 25 1 if Enyr Vs lt 0 25 2 if Epur Vs lt 0 1 where R3 0 if Epgy Vs gt 0 25 4 if Eppy Vs lt 0 25 8 if Epgr VS lt 0 1 24 7600 Plus LCR Meter 151053 A4 Capacitive Reactance Xc 1 2pifC 1000000000 100000000 10000000 1000000 100000
24. 7 Display Type Analysis Utilities Display Deviation from Nominal Yo Deviation from Nominal Pass Fail Bin Summary Bin Number No Display HIT MENU TO RETURN TO MAIN MENU Figure 18 Display Type Allows selection from seven different modes of measurement display these being 29 7600 Plus LCR Meter 151053 A4 2 7 1 Measured Parameters Display is the measured values of both the primary and secondary parameter displayed along with decimal point and units Each value is shown with 7 digits of resolution 6 digits if the result is negative The message Measuring is shown when a measurement is in process with the exception of short measuring times Shown only when Load Correction is on CON Cs 17 52510 pF DF 0 0006500 Measuring Freq 1 0000kHz AC Signal 1 000V Range Auto 33 Average 1 Delay 0 ms Bias Off Figure 19 Measured Parameters Display 2 7 2 Deviation from Nominal Display is the difference in value above or below a stored nominal value for the primary parameter It should be noted that the nominal value is only shown in this display and the Deviation display A 2 8804 pF DF 0 0006500 Freq 1 0000kHz AC Signal 1 000V Range Auto 33 Average 1 Delay 0 ms Bias Off Nominal 82 00000 p Figure 20 Deviation from Nominal Display 2 7 3 Deviation from Nominal Display is the measurement in terms of a percent difference above or below a stored nominal value It should be noted t
25. DEV4 SET 400 CALL IBRD DEV4 R PRINT R 410 CALL IBLOC DEV4 420 END 78 7600 Plus LCR Meter 151053 A4 2 13 2 RS232 Interface The 7600 Plus comes standard with an RS232 serial port interface available through a connector 9 pin on the rear panel of the instrument for connecting to a PC The RS232 standard defines electrical specifications for the transmission of bit serial information The use of the RS232 port requires five lines receive data transmit data data terminal ready data set ready and signal ground With some controllers additional signals maybe required and are listed in Table 4 below Refer to Figure 54 for null modem cable configuration to the standard db9 or db25 connector Refer to Table 3 for the command set Table 4 RS232 Interface Connections ignal Name Pin Number Function Inputs DCD l Data Carrier Detect DSR 6 Data Set Ready RXD 2 Receive Data CTS 8 Clear to Send RI 9 Ring Indicator Outputs RTS 7 Request to Send TXD 3 Transmit Data DTR 4 Data Terminal Ready GND 5 Signal Ground 79 7600 Plus LCR Meter 151053 A4 7600 Plus Controle Ping Function 2 Receive data Connect 3 Transmit data Transmit data to 2 Receive data Data terminal ready 6 Data set ready Signal ground 5 Signal ground Data set ready 4 Data terminal ready db9 to db9 Cable Configuration 2600 Plus Controller Pin Function pint Function 2 Receive data Connect 2 Transmit dat
26. Default setup at power up or any setups recalled from memory they MUST be set to VOLTAGE before applying bias If programmed to CURRENT the instrument can sustain damage from any external source or from a charge stored on the device under test WARNING When using external bias unit must be programmed for EXT bias before the external bias supply is connected to the 7600 Plus External bias supply must be returned to zero volts and turned off before switching back to the OFF or INT mode The BIAS ON indicator adjacent to the BNC measurement terminals serves to indicate if external bias has been called for It indicates that external bias connections have been switched in but not necessarily the presence of external bias When de bias is to be applied to a device observe the correct polarity when connecting the bridge or inserting the device in a test fixture Bias POSITIVE polarity is applied to the high terminals PH IH and bias NEGATIVE polarity applied to the low terminals PL IL It is good practice to wait approximately 1 second after initiating a measurement before taking a reading this allows the device to stabilize after bias is applied When the instrument is triggered remotely a programmed delay is advisable to ensure that the device has stabilized If bias is required at voltages other than the internal 2 volts an external bias can be used as discussed below e Be sure that the voltage does not exceed 200 volts e A cur
27. FF ON OFF DISPlay type Set display type to M Measured Parameter 69 7600 Plus LCR Meter TRIGger NOMinal CONFigure BINNing bin ABS TOL SECondary TRESet SUM Mary FRESult HANDler state RPRint RUSBppy DUPLicate NEW APPend CLOSe SWEep 70 Set the trigger to Set the nominal value for deviation or deviation Set the low amp high limit for the bin Set the below above and nominal value Set the secondary low amp high limit Reset the bin totals to zero Retrieve the bin summary data Set the result format to Turn handler port OFF or ON Turn print results ON or OFF Results to USB Save results as duplicate filename on flash drive Save results as new filename on flash drive Append results to existing filename Close results of filename 151053 A4 D Deviation from Nominal Yo Yo Deviation from Nominal B Bin Number S Bin Summary P Pass Fail N No Display IN Ternal EX Ternal floating point low high floating point s Yo below above nominal 3 floating point s w space between low high floating point s SClentific ENGineering ON OFF ON OFF XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX 7600 Plus LCR Meter PARameter BEGin END STEP RDISplay SWEep VALid CONFigure SAVe DUPLicate XXXXXXXX NEW RECall filename FVALid ESA Ve DUPLicate NEW FRECall filename RVALid SEQuence SEQuence TEST FREQ
28. Labs Form 150077 are provided with the kit 2 14 2 BNC Cable Set 1 Meter 1689 9602 2 Meter 1689 9602 02 The 1689 9602 and 1689 9602 02 are BNC to BNC cable sets used for connecting fixtures component handlers or other measurement devices to the measurement terminals of the 7600 Plus The only difference between the two is that the 1689 9602 cable is 1 meter in length and the 1689 9602 02 is 2 meters in length Ra Wh Ra Wh Figure 55 BNC Cable Sets Connection to 7600 Plus Connect to 7600 Plus Cable Marking Color Connection to DUT PH potential high PH Red white Positive terminal of DUT TH current high TH Red Positive terminal of DUT PL potential low PL Black white Negative terminal of DUT IL current low IL Black Negative terminal of DUT Note H and L denote polarity of AC test signal at 7600 Plus measurement terminals as well as the and polarity of DC bias voltage when applied 2 14 3 Kelvin Clip Leads 1700 03 The 1700 03 Kelvin Clip Leads provide a means for easily making four terminal connections to passive sensors and components when they are tested by the 7600 Plus This cable is especially useful for testing low impedance devices that have large or non standard terminations devices such as electrolytic capacitors and inductors 81 7600 Plus LCR Meter 151053 A4 Ra Wh Rd Wh and denote polarity of DC bias voltage Figure 56 Kelvin Clip Leads For this acce
29. NI AY Suomen noteer eenen 32 XTS Nominal Vale lanta td kal e a a iris A tias 32 Delco RESU GIN en e ce esi ea a an e po es e e e ao a tee 32 Ael Tigger ninenin ean n onlo a E a A 32 ZEIT Handler Terra E SR PRE aee de OR eae ee 33 2 127 RS 232 A ee 33 2 7 13 eneen eensveevenveeneen 34 DA Prnt RESUHS SES ee ee 34 NEEN Ei io US ne 34 Del NG Analysis Men sener haha A EEO ea des 41 COEN A A 43 2 118 Absolute Li Ai 44 X19 Tolerance Percent E 47 27 207 S condary LOW rant ee eee ne 47 221 Secondary Hol entente 47 2 122 A enmet 48 2423 Zero Bm Total ketsen 48 20124 LESS UNC renate nae ae 48 2 8 PAPIE nd e e e cl 51 29 Med E E E E SANS 52 DOA ico A aaa kana gate N ne 52 VE A cr 53 20 3 i ES MEU 54 DIA SAVE SLU ran 55 DOS Recall SECUR dea O 56 7600 Plus LCR Meter 151053 A4 290 VUE ACCURACY ll kt vise ie jo l n a e kk kk e k e on AN Na 56 De METIS MONG E vy ke e sc aye a IA al po eee ken SAY an ae ee 59 A alan ae lan aes ey eS 60 DS CAD ATO n o e ds AS 61 PS Lime Dader en 61 DAT A nnen edrat 62 ZIAZ Set Contrastes nennen reeden 62 2013 Delf Testamente tene hels 63 2914 LCD Baoklte ici better ala Nas 63 2101 Input OU Interact 63 ZA Parallel TAT 0 verant neten eten 67 2 12 IEEE 4882 Interface Optional sa neen teelde 68 ZA ROTA A eed th ns e dc nn T11 2 13 1 Sample Program for National Instruments GPIB card ee eeeeeeeeeeees 78 Dl ROI TET en ed an aie 79 2X133 RESUS TO PAIE ES SAA A 80 2 14 Operatio
30. a 3 Transmit data to 3 Receive data 4 Data terminal ready 6 Data set ready 5 Signal ground 7 Signal ground 6 Data set ready 20 Data terminal ready db9 to db25 Cable Configuration Figure 54 RS 232 Cable Configurations 2 13 3 Results to Printer The 7600 Plus can be setup to output to an RS 232 or IEEE printer RS 232 RS 232 must be selected on I O Menus and format set IEEE must also be selected for Talk mode and Disable state IEEE IEEE must be selected on I O Menus and set for Address Talk mode and Enable state 2 14 Operation with Accessories A wide selection of accessories such as test leads cables and fixtures are available from IET Labs to enhance the operation of the 7600 Plus Precision LCR Meter NOTE Instrument accuracy can be reduced from nominal specifications when using some 7000 accessory fixtures and cables Best accuracy requires geometric consistency between that utilized during open short zeroing and that utilized on fixtures and cables during the actual measurement process This consistency may be especially difficult to achieve when using unshielded Kelvin clip and tweezer type connections 80 7600 Plus LCR Meter 151053 A4 2 14 1 Rack Mount Kit 7000 00 The 7000 00 Rack Mount Kit is used to install the 7600 Plus in a rack mount configuration The main components of the kit include front handles front angle brackets rear vertical trim pieces and rear support brackets Assembly instructions IET
31. al Signal Type Current Signal Value 1 000 V HIT MENU TO RETURN TO MAIN MENU Figure 13 AC Test Signal 17 7600 Plus LCR Meter 151053 A4 Allows selection of the AC Signal Type as a Voltage source or Current source RIGHT LEFT arrow keys With Signal Type selected as Voltage Signal Value accepts entry of a value between 0 020 and 5 volts open circuit in 0 005 V steps With Signal Type selected as Current Signal Value accepts entry of a value between 0 00025 and 1 amp short circuit in 0 00005 amp steps Numerical values can be entered directly with units Units for voltage value mV or V and units of current value A mA or A are selected by the UP DOWN arrow keys Any numerical entries with resolution greater than 0 005V 5 mV for voltage or 0 00005A 50 LA for current will be truncated or ignored In voltage mode the selected voltage is maintained at the instrument test terminals with the terminals open but not necessarily at the device under test In current mode the selected current is maintained at the device under test independent of changes in the device s impedance It should be noted that even though the maximum programmable current is 100 mA the instrument is limited to a compliance voltage of 3 volts in current mode i e I times Z must be less than 3 volts otherwise erratic measurement results could occur The current required to test a device may exceed 100 mA if the source voltage is programmed to
32. and secondary parameter bins 11 15 and analog measurement data Electrical Characteristics Inputs START TRIG Condition Input Current Input Voltage Active High Signal current driven Signal IGND 5 50mA 5 24V Active Low Signal current driven Signal V ext 5 50 mA 5 24V Outputs Binl Bin16 EOT BUSY Condition Sink Current Output Voltage Low High Binning signals 200 mA max 150mW lt 05V 5 40V Control signals 200 mA max 150mW lt 05V 5 40V 66 7600 Plus LCR Meter 151053 A4 Bin0 Bin15 EOT BUSY IGND START TRIG INT START TRIG INT PS2702 1 Figure 53 I O Interface Isolation The outputs are optically isolated for added interfacing flexibility and to increase reliability by reducing noise pickup and ground loop interference The optocouplers use open collectors and can sink up to 200mA of current provided by an external source at up to 40V No provisions for pull up resistors are provided on board The isolated ground return can be floated or connected to the 7600 Plus system ground for use with isolated handlers The isolators are driven by inverting high current buffers All inputs are also optically isolated Both anode and cathode of the input opto isolators are available in the handler interface connector Active high inputs can be achieved by grounding the cathode signal and driving the anode signal while c
33. ant to be turned to Off in a noisy environment To ensure that stored setups are backward compatible Distortion On or Off is not saved in setups stored internally or on USB flash drive On instrument power down the Distort Detect will be restored to its last previous state 2 9 2 Load Correction Load correction allows the user to specify the value of the component under test user supplied standard and apply a correction to subsequent measurements of similar components under the same test conditions This feature corrects for instrument non linearity and for fixture effects which can be dependent on the test frequency test voltage level or impedance range Measurement accuracy is 0 25 x normal accuracy with Load Correction implemented and compared to user supplied standard and for the same measurement conditions Same measurement conditions are test voltage test frequency and 7600 Plus measurement range This increased accuracy applies in a range of DUT s with impedance Z between 30 and 800kQ with programmed voltage from 100mV to 1V or from 100mV to programmed current x Z lt 1V Load correction can be selected as Off On or Edit Edit allows the primary and secondary values to be entered the parameter for these values is defined by the Primary and Secondary Parameter in the main Setup menu After the nominal values have been entered if Measure is selected for ON the user presses START to initiate the correction me
34. arameter can be XXXXXXX XX REMOTE COMMAND PREFIX INVALID IEEE or RS232 command prefix is incorrect for example to configure unit use CONFigure SHUT THE POWER OFF Malfunction of instrument power source SWEEP BEGIN amp END ARE EQUAL Sweep range improperly set SWEEP BEGIN END VALUES TOO CLOSE Sweep range improperly set SWEEP BEGIN VALUE GREATER THAN END Sweep range improperly set TIME DATE ERROR PLEASE SET Reset time and date TOO MANY KEYS LAST KEY IGNORED Too many keys for entry field UNABLE TO READ FROM FLASH DRIVE Flash drive defective or not inserted UNABLE TO READ THAT FILENAME Selected file unreadable improper format UNABLE TO WRITE TO REMOTE IEEE or RS232 not setup correctly or IEEE not present UNKNOWN COMMAND UNKNOWN UNIT Flash drive is not recognized not present or defective USB MEDIA DEFECT Flash drive defective USB READ FAULT Flash drive defective or not inserted USB SAVE ERROR Setup not properly saved 91 7600 Plus LCR Meter 151053 A4 USB SECTOR UNFORMATTED Flash drive is not formatted USB SEEK ERROR Flash drive defective or not inserted USB WRITE FAULT Flash drive defective or not inserted VALID RANGE low value hi value Entry invalid should be between specified values WARNING V gt 1 BIAS NOT AT 2V DC bias voltage incorrect 92 7600 Plus LCR Meter 151053 A4 4 Theory The 7600 Plus Precision LCR Meter consists of a standard mechanical package
35. are active all other keys disabled The difference is that in lockout with setup recall the menu key also allows setups to be recalled from instrument memory When either is selected the operator must enter a password number up to 8 characters CAUTION For security reasons the password is not displayed when it is entered so the password should be keyed in distinctly and remembered Failure to remember an entered password requires the factory override 760001 60 7600 Plus LCR Meter 151053 A4 ENTER PASSWORD 8 CHARACTERS MAXIMUM default 760001 x kK ok ok ok ok ok ok Once the password is entered and entered again for verification testing can begin by pressing START or the password cleared or changed by selecting MENU HIT MENU KEY TO ENTER PASSWORD AND TO RETURN TO THE MENU OR HIT THE lt START gt KEY TO START A MEASUREMENT Once activated only the START STOP and MENU on the instrument front panel are active all other keys are disabled To turn the lockout feature off and reactivate menus select MENU select Exit Lockout in Lockout with Setup Recall mode and enter the previous password from the keypad the instrument will again function as normal If Recall Setups is chosen in the Lockout with Setup Recall mode the instrument functions as described in paragraph 2 6 5 2 under Recall Setup 2 9 9 Calibration Refer to Calibration on page 96 INSTRUMENT CALIBRATION SHOULD ONLY BE PERFORMED BY QUALIFIED SERVICE PERSONNEL
36. asurement While the measurement is being made Measuring Correction will be displayed After the correction measurement the actual Measured Primary and Secondary value will be displayed along with the selected Freq Range Primary and Secondary parameter During the load correction measurement the instrument is automatically placed in the Slow Measurement Accuracy mode Load Correction Measure ot Ki Primary Nominal 60 00000 pF Secondary Nominal 4 000000 m Measuring Correction Measured Primary 60 25518 pF Measured Secondary 0042580 Freq 1 0000MHz Primary Cs Range 49 Secondary DF HIT lt START gt TO MEASURE CORRECTION HIT lt ENTER gt TO CHANGE VALUES HIT lt MENU gt TO RETURN TO MAIN MENU Figure 41 Load Correction 53 7600 Plus LCR Meter 151053 A4 The Load Correction will only be made for the Frequency Range Primary and Secondary Parameter that was selected when the correction was determined For example if the correction measurement is made under the conditions of Cs DF at 1 MHz and range 49 these are the only conditions under which it will be applied 2 9 3 Utilities Menu 1 0 Analysis Utilities Recall Setup AutoAcc Open Short Lock Out Calibration Set Time Date Usage Cal Date Set Contrast Self Test LCD Backlite CUT On Figure 42 Utilities Menu The last of the four main menus is Utilities shown above Each function is described in detail below Setup VO__ Analysis Util
37. ber Display 2 7 7 No Display Instrument display is inhibited from indicating any measurement results This is sometimes used for security reasons or for the purpose of reducing test time during remote operation 2 7 8 Nominal Value Allows entry of a Nominal Value for the primary parameter which is the basis for the measurement result in Deviation or Deviation Accepts numerical entry up to seven digits with decimal Units are selected by the UP DOWN arrow keys and determined by the primary parameter selection i e in Farads Ohms Henries etc NOTE The nominal value has no relationship to nominal values entered during binning setup 2 7 9 Result Format Allows selection from two different measurement result formats SCI and ENG for scientific or engineering units Scientific units are expressed as an exponent and engineering units are expressed in ohms for resistance farads for capacitance henries for inductance etc For example e3 in scientific units can be expressed as kQ in engineering units or e 3 in scientific units can be expressed as mQ in engineering units this is strictly user preference and convenience When scientific units are selected the results will always be displayed as some number of digits with decimal exponent and units When engineering units is selected the results will be displayed as some number of digits with decimal and units 2 7 10 Trigger Allows selection of two trigger modes Internal
38. by a SRE lt gt command Standard Event Status Register Decimal Bit Value Use 7 128 Power Up Since Last Query 6 64 None 5 32 Command Error Syntax 4 16 Execution Error Over Range etc 3 8 No Contact 2 4 Query Error 77 7600 Plus LCR Meter 151053 A4 l 2 None 0 l Operation Complete This register is read by executing an ESR command page 76 except no Note that this is a destructive read Reading the register clears it Each bit of the Event register must be enabled in order to cause the ESB bit of the Status Register to be set This enabling is done in the Standard Event Status Enable Register by issuing an ESE command 2 13 1 Sample Program for National Instruments GPIB card 260 SAMPLE 7600 Plus BASIC PROGRAM FOR NATIONAL INSTRUMENTS IEEE Merge National DECL BAS here 270 ADAPS GPIBO DEV4 Dev4 R SPACE 60 280 CALL IBFIND DEV4 DEV4 290 CLS SET CONDITIONS MEASURE AND DISPLAY DATA ok oke took kok ok ok ok oke ok 300 SET CONF REC DEFAULT CALL IBWRT DEV4 SETS 310 SET CONF FREQ 1000 00 CALL IBWRT DEV4 SET 320 SET S CONF PPAR CS CALL IBWRT DEV4 SETS 330 SET CONF SPAR DF CALL IBWRT DEV4 SET 340 SET CONF MAC ENH CALL IBWRT DEV4 SETS 350 SET CONF NOM 0 CALL IBWRT DEV4 SETS 360 SET CONF DISP M CALL IBWRT DEV4 SET 370 SET MEAS CALL IBWRT DEV4 SET 380 FORI 1TO 5000 NEXT I 390 SET FETC CALL IBWRT
39. ce the 7600 Plus is powered up it is ready immediately for testing at default test conditions by pressing the START button Any of these conditions and all other instrument operations can be changed by easy to use menu functions for simplicity of understanding descriptions and uses of all these functions refer to menu discussions starting on page 12 The Contents list in the front of this manual should be used for quickly locating specify subjects of interest 2 1 Startup Connect the instrument power cord to the source of proper voltage The instrument is to be used only with three wire grounded outlets Power is applied to the 7600 Plus by pressing the POWER button on the front panel The instrument runs a self test and any error messages are displayed accordingly 2 2 Connection to Device Under Test The 7600 Plus unit employs a four terminal measurement configuration that permits easy accurate and stable measurements and avoids mutual inductance interference from measurement signals noise and other factors inherent with other types of connections To maintain measurement integrity IET Labs makes available a number of accessory cable sets and fixtures for connection directly to the front panel BNC connectors Refer to section 1 5 on page 4 for a list of available accessories 7600 Plus For quarded measurements connect to DUT shield Figure 5 Test Lead Configuration Figure 5 shows the 7600 Plus connector configuration and a t
40. complies with USB v2 0 standard The USB host port is not designed to be connected to a PC Printer or USB hub 34 7600 Plus LCR Meter 151053 A4 Allows user to store measurement results on flash drive If a results file is not open the user is prompted for the filename up to 8 characters and the file is opened To close a results file that is currently open select Results to USB and close If a results file is open when a setup is saved when the setup is later recalled the user will be prompted for a results file name When multiple tests are being conducted the results are stored to USB periodically every 10 measurements from an internal buffer To be sure of storing all results before power is shut down the file needs to be closed as discussed earlier It is also important to note that a file should be closed before changing or recalling a new set of test conditions otherwise the stored measurement results would not be consistent with the setup conditions stored in the file The measurement results are stored as an comma separated ASCII text file under its assigned identifying number up to 8 characters The extension for Data is csv The test setup conditions are saved as a header at the beginning of a results file A sample file format is shown below Note that the results can be stored in either engineering or scientific terms dependent on what the user has selected for setup conditions The format of the result string i
41. cycle is required just to collect data 2 6 9 Measurement Delay Accepts entry of a delay time between 0 and 1000 in 1 ms steps This is a programmable delay time from the internal or external trigger command to the start of the measurement In many cases it is helpful to have a time delay before actually starting to take data Such a delay allows time for switching transients or mechanical handling to settle 2 6 10 to Average Accepts entry of the number of measurements to Average between 1 and 1000 If the entered value is 1 averaging is disabled and the display is updated with each individual measurement If the average is 2 to 1000 the final average value is displayed at the end of the measurement cycle and held until the end of the next measurement cycle Measurement accuracy can be improved as noted below and will be indicated on the AutoAcc display but never less than 0 05 for primary parameter or 0 0005 for secondary parameter If the number to average is greater than 1 Divide the primary accuracy by the square root of the number to average Divide the secondary accuracy by the square root of the number to average 2 6 11 Contact Check Allows selection of Contact Check Off or On When on any detection of contact failure or open circuit to the device under test will be indicated prior to the measurement A contact failure is considered to be an open circuit greater than the open circuit calibration of the instrument Contact C
42. de 31 Figure 24 Bin Number Display tst te eeens A en elende 32 Figure 25 RS 232Sef p POMAR 33 Figure 26 IEEE Setup FORAL pos pe ao Ree 34 Figure 2 f ATA ATY SIS MENU e aia 42 Figure 28 BINDIN iranienne oken aa de ka ava aaa digo na pies isen 43 Fours 29 Absolute Limitearen a o ea 45 Figure 30 Absolute Limit Numeric Entry ossaert aye deside kase bes dala cho kaa soad a 45 Figure 31 Absolute Limit Engineering Units conan cconncnns 45 Figure 32 Tolerance AA A 47 Figure 33 Bin Totals sain named dia 48 Figure 34 Sequence Setup Test Conditions nn nst 48 Figure 35 Sequence Setup Parameter Selection sitiada mid 49 Fig re 36 S quence IO ll a 50 Figure 37 Sequence Results oi aa kal andante teekenen 50 Figure 38 Parameter S Weep zenne iia 51 A E E A e RO 51 Figure 40 Sweep Ploteriai aa e e 52 Figure Al Load COM CHION lidad 53 Figure 42 Sa 54 Figure 43 Save SOUP 44006 name Mann We 55 Figure 44 Yes OF NO 55 Ed Recall Sep set ne nee 56 Pigtire AG SENN ACTUA ln Nil n aaa been pa kons ay ko ae aaa saba 57 7600 Plus LCR Meter 151053 A4 igure 47 Opent OR vap Scene ea er 60 O 60 Figure 49 Set Time Daten sentant en 61 Figure A ea a a eneen eht 62 Fig re Sl Set CONTEST aide kaka ke dde 62 Fett 32 1 0 Interfaces FMB tte Manke dn dna ke kt a ae ii 65 Figure 33 IO Interface OA Sa Sorat aces AN Lt nu 67 Figure 54 RS 232 Cable Configurations ennen one ennvenseenvenneenvenneenneenseenvennvenn 8
43. desirable to blank out the code above in this instruction manual The step by step instructions for this procedure is shown on the instrument display 96 7600 Plus LCR Meter 151053 A4 5 4 2 Instrument Return Before returning an instrument to IET Labs for Service please obtain an online Return Materials Authorization Number RMA This number when placed on the outside of the shipping package will speed processing at our Service Lab and will serve as a reference number for the time your unit is at IET Labs Please contact our Sales Department at 516 334 5959 for additional support It will be necessary to include a Purchase Order Number and credit card information to insure expedient processing although units found to be in warranty will be repaired at no charge For any questions on repair costs or shipment instructions please contact our CCC Department at the above number To safeguard an instrument during storage and shipping please use packaging that is adequate to protect it from damage i e equivalent to the original packaging and mark the box Delicate Electronic Instrument Please follow online instructions for shipping materials back to IET Labs 97
44. e 26 IEEE Setup Format Note IEEE Interface is an Option If option is not installed State cannot be enabled Allows user setup of IEEE 488 interface format Choices include Address 1 through 16 Mode Talk or Talk Listen State Disable or Enable UP DOWN arrow and ENTER selects the desired format and then LEFT RIGHT arrow and ENTER allows for selection of choices within each format The instrument will function as either a Talk or a Talk Listen device in a system depending on the choice made by the operator under Mode Talk is generally suited to a simple system with no controller or other talkers for example a printer Talk Listen denotes full programmability and is suited for use in a system that has a controller or computer to manage data flow The handshake routine assures that the active talker proceeds slowly enough for the slowest listener 2 7 14 Print Results Allows user to output results to the parallel port by selection of Off or On Before selecting On make sure the printer is connected and on line File format for printing is the same as shown in the next paragraph under Results to USB Lines not printed are indicated 2 7 15 Results to USB The 7600 Plus can be used with most USB memory sticks mass storage class FATI6 FAT32 format maximum consumption current must be below 500 mA The memory stick can be installed and removed at anytime The USB stick is automatically mounted when installed The USB host port
45. e FO 25A 250V 5x20mm fast blow Replace only with the same rated fuse Make sure the instrument is off and disconnected from its ac power source The fuses are located in the instrument on the back panel QT110407 board 5 2 Resetting of Time and Date If for some reason the Time and Date need to be reset It is very important that the time and date be reset and the instrument zeroed before proceeding with any measurements Proceed as follows 1 Press MENU key to select menu display 2 Press Right or Left Arrow key to select Utilities menu 3 Press Up or Down Arrow key to select Set Time Date 4 Press ENTER key to activate the entry field 5 Set the current time and date as instructed on the display refer to paragraph 2 6 5 7 if necessary After the time and date have been reset press MENU to return to the menu display 6 Press Up or Down Arrow key to select Zero 7 Press ENTER key to activate the Zero routine and follow instructions on the instrument display 8 Once the Time and Date have been reset and the instrument zeroed the 7600 Plus is ready for routine measurements It s important to note that the elapsed time will have been reset back to zero during this process 5 3 Loss of Display Contrast If for some reason the instrument should loose its display contrast it is possible to reset it easily using the procedure below Loss of contrast would exhibit no display at all when the instrument is powered up Procedure f
46. econdary readings 600 ppm Connection to 7600 Plus using 7000 01 or 7000 02 BNC Cable Sets Connect to 7600 Plus Cable Marking Color Connect to Test Fixture PH potential high PH Red white PH TH current high TH Red IH PL potential low PL Black white PL IL current low IL Black IL If the device under test DUT is a radial lead component it can be inserted directly into the fixture slots The slots accommodate wires with diameters from 0 25 mm to 1 mm AWG 30 to AWG 18 wire Ifthe DUT is an axial lead component the two axial lead adapters should be installed in the fixture by pushing vertically downward and the component installed in them These adapters accommodate wire with diameters up to 1 5 mm AWG 15 wire When removing lift with a gentle tilt left or right never forward or back 85 7600 Plus LCR Meter 151053 A4 2 14 7 Open Short Zeroing Instrument zeroing should be performed once the test fixture is connected For an open a lead should be inserted in the slot and another lead in the slot to ensure good contact between the wiper blades and for a short the and contacts should be shorted together with bus wire the larger the better but in accordance with wire sizes discussed above It should be noted that if measurements are to be made on the very lowest range 20 mQ full scale readings could be in error although small by the resistance value of the short itself The approximate value of the
47. eee 4 1 5 Accessories Options Available k beki ai e asa ent set sansa sona dan s de 4 L or chatons etn ete 4 1 6 1 POWET REQUIEM SAI ada 4 116 2 Safety INSpeCTION Las et bete Bit 5 O 8 16 4 Disposal uretra 8 Operation earned Rt TEE E A E ea re ie 9 2 1 LAE o RS CA E aston arate ETA 9 2 2 Connection to Device Under Tetuan 9 2 5 Zeroing natens es rada ds e a a o 10 2 4 Measurement Pa o e ae a 10 2 4 1 Default Measurement Conditions did 11 2 5 Factory default measurement conditions anssen ere eerneeenneenseersneerseenn 11 2 6 Men FUNCHONS atis vois dan tete feel apati asa dote nenten ende k 12 26 1 Setup Men en TO 13 2 6 2 Primary Parameter Jm senaten bk kode kin sesa laa ea in oka ka kaa 14 26 5 Secondary PAra AA 17 2604 A fa ai eee tee sea de ee 17 265 LAC Test Stendal rennen met eee nete 17 26 6 DEBIL VOLE a reek 20 201 Range Hold oons A 21 200 A nde AAA 22 2 0 9 Measurement DETAY naast an p dan a tata kob tw a disa MA aba 27 2 6 10 MLO AN CLAS enen aken enden dates 27 ZOAL Contact Cheeks narnia ted nde aaneen Wend 27 26 12 WOMEN eee ANA 28 7600 Plus LCR Meter 151053 A4 il DS Display IDE Yo pa io DS NOAA 29 Zetel Me s red Parameters atlete poko l se sacs seq heeele 30 2 7 2 Deviation from Nominal iii dati 30 Zofia 6 Deviation from AN ONA ANS netsh aa ek celta nt eee ne er 30 2TA PAST ANN eke ee ee E cn M a 31 ATA Bin Summary neede nen 31 2 OF A ae eerde eeen 32 ZA INO TI
48. elected logarithmically over the specified begin to end range Sweep Format is selected to be Table as shown in Figure 39 or Plot as shown in Figure 40 Plot Table Frequency Cs 1 0000kHz 471 4576nF 0 003135 1 2915kHz 470 4563nF 0 003675 1 6681kHz 469 8878nF 0 003867 2 1544kHz 468 9983nF 0 010035 2 7825kHz 466 4532nF 0 010078 3 5938kHz 462 6634nF 0 011045 4 6415kHz 460 6645nF 0 012895 5 9948kHz 459 7892nF 0 014786 7 7426kHz 458 7845nF 0 016782 10 000kHz 456 5454nF 0 018544 Figure 39 Sweep Table 51 7600 Plus LCR Meter 151053 A4 The sweep table lists the measurement results for primary and secondary parameter unless none is selected along with the test condition variable of frequency voltage or current A table can be comprised of 25 50 100 or 200 entries and the UP DOWN arrow keys or Prev or Next Page used to scroll through the display NOTE Scroll is not functional when IEEE 488 is enabled 200 0 180 0 160 0 140 0 120 0 100 0 zio 50 000k 51 000k 54 000k 62 000k Frequency Hz Figure 40 Sweep Plot The sweep plot shows the measurement results of the primary parameter vertical axis vs the variable test condition of frequency voltage or current horizontal axis It should be noted that space available on the display limits the number of graduations and resolution of axis labeling The horizontal axis is labeled from the Sweep Begin to the Sweep End values as selected by the user with two additional
49. enabled this command will trigger those type of measurements also The result type is set by the display type parameter FETCh Fetches the most recent measurement results The character sequence formats are as follows Normal Measurements lt primary result name gt lt tab gt lt primary result gt lt tab gt lt units gt lt secondary result name gt lt secondary result gt lt tab gt lt units gt lt tab gt lt bin or tab gt lt tab gt lt gt lt tab gt lt pass string or fail string or tab gt lt tab gt lt retest or tab gt terminated by a linefeed The secondary parameter will be blank when the parameter is set to NONE Sweep Measurement If sweep is enabled fetch will give all of the results based on the number of steps selected with the normal measurement format FETCh Sequence Measurement If sequence is enabled results will be sent for each test enabled Ist line lt pass fail bin gt lt tab gt lt gt additional lines for tests enabled lt test gt lt tab gt lt gt lt tab gt lt primary result gt lt tab gt lt units gt tab secondary results tab units tab fail or tab last line for tests enabled lt test gt tab lt gt tab primary result tab units tab lt secondary results tab units tab fail or tab terminated by a linefeed Bin Summary Measurement 75 7600 Plus LCR Meter 151053 A4 Bins 1 10 bin tab
50. ens 95 52 Loss of DIEpP AVE ONA SE ea SN Re nat 95 DA Calibration ram deer v ee aa bec A AT aiaia 96 5 4 1 Requirements for Re calibration tn sorteren krek ak 96 DAD AA NN Nate 97 Figures Figure 1 7600 Plus Precision LER Meter ves sasa drink re akasan at l Figure 2 Front Panel Controls amp Indicators 2 Figure 3 Rear Panel Controls amp Indicators 3 Fig re 4 PUSS DraW t bi dades 5 Figure 5 Test Lead Cone ue AA ONA dodo 9 Figure 6 Measured Results Display ss dat entices neden eed 11 Figure 7 Setup Men sentent eten v pik kase 13 Figure Primary ParAmetetstsin es cr ea sa eo 14 Figure 9 Series and Parallel Circuits for both Capacitive and Inductive Impedances 15 Figure 10 Phase Diagrams of Impedance in O ak sa pei ass 16 Figure 11 Phase Diagrams of Admittance nt a ao ne si asosi zane 16 Figure 12 Secondary Parameter summer insnet annie aarin eh 17 Figure T3 AG TES SIONAL e e e e sa e 17 Figure 14 Capacitive Reactance vs Frequency escasos iio bieen 25 iv 7600 Plus LCR Meter 151053 A4 Figure 15 Inductive Reactance vs Frequency id A nm 26 Figure 16 Measurement ACCUraCyY dennen ss ee ke te so Me nt 26 Figure 17 VO Mem iris 28 Figure 18 Display TP a o nn cn 29 Figure 19 Measured Parameters Display rss err tee arten ete antennae 30 Figure 20 Deviation from Nominal Display 30 Figure 21 Deviation from Nominal Display 31 Figure 22 PASPA TL eneon di a eten ita 31 Figure 23 Bin Summary Display verende treed maten delen
51. er 151053 A4 14 Accessories Included 151053 Instruction Manual l Calibration Certificate l Power Cord CE units with international cord set l Fuse T2 5A 250V 5x20mm for 115 220V operation 1 FLASH 118 512Mbyte Memory Stick l 1 5 Accessories Options Available Rack Mount Kit 7000 00 BNC Cable Set 1 meter 1689 9602 BNC Cable Set 2 meters 1689 9602 02 Kelvin Clip Leads 1700 03 Alligator Clip Leads 7000 04 Clip Component Tweezers 7000 05 Low Voltage Axial Radial Lead Component Test Fixture 7000 06 Low Voltage Chip Component Test Fixture 7000 07 Calibration Kit 7000 09 RS232 Cable 630158 USB to RS232 Adapter 630250 1 6 Installation The 7600 Plus contains a high resolution back lit LCD for convenient viewing The optimum angle for viewing is straight onto the display This means that for bench operation the front bail should sometimes be used to angle the instrument up and for rack installation it should be mounted somewhat at eye level 1 6 1 Power Requirements The 7600 Plus Precision LCR Meter can be operated from a power source between 90 and 250Vac at a power line frequency of 47 to 63Hz no line voltage switching is necessary Power connection to the rear panel is through an ac inlet module comprised of an ac connector and fuse drawer Always use an outlet that has a properly connected protection ground Before connecting the 3 wire power cord between the unit and AC power verify the fuse is in accordance with the power source
52. est 2 Primary parameter fail Bin 4 Test 2 Secondary parameter fail Bin 5 Test 3 Primary parameter fail Bin 6 Test 3 Secondary parameter fail Bin 7 Test 4 Primary parameter fail Bin 8 Test 4 Secondary parameter fail Bin 9 Test 5 Primary parameter fail Bin 10 Test 5 Secondary parameter fail Bin 11 Test 6 Primary parameter fail Bin 12 Test 6 Secondary parameter fail Bin 13 Unused Bin 14 Pass Bin Bin 15 Contact Check fail 49 7600 Plus LCR Meter 151053 A4 For the binning function to be enabled Bin 1 limits must be set non zero If zero is entered for Low or High the previous value is cleared and that bin disabled Valid range for primary or secondary is 108 to 109 All sequence binning limits must be entered on the display shown below and NOT the standard binning displays Sequence Setup Test 1 Low LIMIT High LIMIT 90 00 k 110 00 k 100 00 k 120 00 k Figure 36 Sequence Binning Test conditions of measurement sequences can be stored and or recalled as part of test setups If a test sequence is stored as On the sequence will be executed once the Start button is pressed if the test sequence is stored as Off the sequence will be inactive until turned on Note that a sequence of up to six tests can be terminated on any test of the sequence if the user has specified Stop on Fail for that test If Stop on Fail is not selected the sequence continues until a failure occurs in a test where Stop on Fa
53. evice to the energy dissipated by the device Q is dimensionless and is expressed as Q X R B G One can see that Q is the tangent of the angle 8 Q is commonly applied to inductors and for capacitors the term generally used to express purity is Dissipation Factor D which is the reciprocal of Q 16 7600 Plus LCR Meter 151053 A4 Any parameter primary or secondary can be chosen as the default parameter at power up 2 6 3 Secondary Parameter Analysis Utilities 4 HIT MENU TO RETURN TO MAIN MENU Figure 12 Secondary Parameter Additional Parameters not shown and selected by UP DOWN arrow keys include Lp IZI IYI Xs Bp As in the primary parameter selection any one parameter can be chosen by the operator for display The instrument as powered up provides a default secondary parameter When the default primary parameter is Auto the secondary parameter is dependent and determined by it If the primary default is Cs the secondary defaults to D If the primary default is Ls or Rs the secondary defaults to Q The parameter selection can be chosen by the operator through menu selection 2 6 4 Frequency Numerical entry accepts up to five digits with decimal of the desired test frequency between 10 Hz and 2 MHz Resolution of setting is 0 1 Hz from 10 Hz to 10 kHz 5 digits above 10 kHz Units of frequency Hz kHz or MHz are selected by the UP DOWN arrow keys 2 6 5 AC Test Signal Setup Analysis Utilities AC Sign
54. g For example if no limit is set the measurement string contains no bin results thus the string has fewer characters The same is true with header information multiple headers different test conditions will consume more memory 2 7 16 Analysis Menu Analysis Utilities Test Sequencing eu Parameter MOT Median Off Distort Detect Off Load Correction ei On Edit 41 7600 Plus LCR Meter 151053 A4 Figure 27 Analysis Menu The third of the four main menus is Analysis shown above Each function controls the analysis of measurement results and is described in detail below Setup VO__ Analysis Utilities Absolute Limit Bin Low Limit 0 Tolerance Bin RENE Nominal Secondary Low numeric entry _ Below Secondary High numeric entry Above View Bin Totals Zero Bin Totals Test Sequencing Off On Edit Parameter Sweep Off On Edit Median Off On Distort Detect Off On Load Correction Off On Edit 42 7600 Plus LCR Meter 151053 A4 2 7 17 Binning Analysis Utilities Binning Tolerance Secondary Low 0 000000 Secondary High 0 000000 View Bin Totals Zero Bin Totals HIT MENU TO RETURN TO MAIN MENU Figure 28 Binning The 7600 Plus provides sorting into 15 bins 10 pass 4 fail and 1 for no contact For the binning function to be enabled one or both of the two conditions must be met 1 Bin 1 limits must be set non zero 2 Seconda
55. greater than 2 5 V To determine the current required use the following formula I E Fa J25 Ria Xa If the current is greater than 100 mA reduce the program voltage otherwise unpredictable measurement results may occur 1 volt above 500 kHz 0 5 volts above 1 MHz 18 7600 Plus LCR Meter 151053 A4 Maximum Reccomended Test Frequency in Current Mode vs Inductance 1 0E 6 400 kHz 100 0E 3 Testing in current mode may give Q errors for Current Testing OK may g Q e i inductors above this line below this line 10 0E 3 35 kHz sqrt L mH 1 0E 3 1 00E 06 1 00E 05 1 00E 04 1 00E 03 1 00E 02 1 00E 01 1 00E 00 Maximum Test Frequency vs Measured Inductance In Current Mode 19 7600 Plus LCR Meter 151053 A4 2 6 6 DC Bias Voltage Allows selection of a dc Bias Voltage of Off Internal or External e Off When selected no de bias voltage is applied to the device under test e Int When selected an internal bias voltage of 2 volts is applied to the device under test Internal bias can not be programmed if the AC Test Signal is programmed for gt 4V at 500kHz e Ext When selected an external bias voltage between 0 and 200 volts can be applied to the device under test by way of the rear panel external bias connection CAUTION Make sure the AC test Signal is selected for VOLTAGE and not Current before switching to INT internal or EXT external bias This also applies to the instrument s
56. hat the nominal value is only shown in this display and the Deviation from Nominal display 30 7600 Plus LCR Meter A DF Freq Range Delay Nominal Figure 21 Deviation from Nominal Display 2 7 4 Pass Fail Yo Deviation from Nominal 2 59417 Yo 0 0006500 1 0000kHz Auto 33 Average 0 ms Bias 82 00000 p AC Signal 1 000V 1 Off 151053 A4 Display is measured results as a pass or fail only based on entered binning limits 2 7 5 Bin Summary Pass Fail Rs 2 894050 MQ GQ 1 565000 PASS 1 0000kHz Auto 33 Average 0 ms Bias Figure 22 PASS FAIL AC Signal 1 000V 1 Off Display is a summary of the entered bin limits and the total number of measurements made which meet the requirements of that bin since the bin counter was last reset Low LIMIT 90 00 k Q 100 00 k Q 110 00 k Q 120 00 k Q 130 00 k Q High LIMIT 110 00 k Q 120 00 k Q 130 00 k Q 140 00 k Q 150 00 k Q PRI Pass SEC Fail LOW PRI Pass SEC Fail HI PRI Fail SEC Pass PRI Fail SEC Fail NO CONTACT Pass 595 Fail 190 Figure 23 Bin Summary Display Total 250 100 90 80 75 60 55 50 20 5 785 31 7600 Plus LCR Meter 151053 A4 2 7 6 Bin Number Display is a bin assignment along with the currently programmed test conditions for the most recent measurement result Bin Number 10 Freq 1 0000kHz AC Signal 1 000V Range Auto 33 Average Delay 0 ms Bias Off Figure 24 Bin Num
57. heck is generally recommended in automatic handler production type applications with the 7600 Plus For Contact Check operation the Range Hold must be selected ON 21 7600 Plus LCR Meter 151053 A4 NOTE A contact check is possible on three of the four Kelvin connections by a loss of voltage detecting technique a failure on the PL connection can t be detected since it is at virtual ground potential internal to the instrument The contact check is likely to be unreliable when measuring devices of less than 100 mQ of impedance 2 6 12 I O Menu Analysis Utilities Nominal Value Result Format Trigger Handler RS 232 IEEE Print Results Results to USB Figure 17 I O Menu The second of the four main menus is I O shown above Each function controls measurement results or instrument I O interface and is described in detail below 28 7600 Plus LCR Meter 151053 A4 Setup T O Analysis __ Utilities Display Type mmm Measured Parmeters Deviation from Nominal Nominal Value numeric entry Deviation from Nominal Pass Fail Result Format Sci Bin Summary Eng Bin Number Trigger Int No Display Ext Handler Off On RS 232 Baud 12 Parity None gon Data Bits 7 ved i 96 E Even Stop Bits 1 Mode Talk an Talk Listen Disable Enable IEEE Print Results Off Address numeric entry Mode Talk On Talk Listen Print Results to USB Off State Disable On Enable 2
58. his side Locking tab Figure 4 Fuse Drawer 1 6 2 Safety Inspection WARNING If this instrument is used in a manner not specified in this manual the operator and the equipment are at risk 1 Never touch the metal of the High Voltage probe directly Touch only the insulated parts of the lead s 2 Never touch the test leads test fixture or DUT in any manner this includes insulation on all wires and clips when the high voltage is applied and the red DANGER light is ON 3 Before turning on the Guardian unit make sure there is no device DUT or fixture connected to the test leads 4 After each test press the STOP red button for safety This terminates the high voltage being applied to the output terminals 7600 Plus LCR Meter 151053 A4 10 When the red DANGER LED is lit or flashing NEVER touch the device under test the lead wires or the output terminals Before touching the test lead wires or output terminals make sure a The red STOP button has been pressed b The red DANGER LED is OFF In the case of an emergency turn OFF the POWER switch using a hot stick and disconnect the AC power cord from the wall DO NOT TOUCH THE INSTRUMENT Position the equipment so it is easy to disconnect Disconnect by means of the power plug or power connector If the DANGER LED does not go off when the STOP button is pressed immediately stop using the tester It is possible that the output voltage i
59. i 2 AN gt 7 Witte Red SES Black White Figure 57 Kelvin Test Leads Open Short Zeroing 2 14 4 Alligator Clip Leads 7000 04 The 7000 04 Alligator Clip Leads is generally used to connect to devices that are multi terminal physically large or otherwise unsuited for one of the remote test fixtures The lead set is consists of a BNC to BNC cable four banana plug adapters and four alligator clips One of the banana plug adapters is supplied with a pigtail for connecting a guard if necessary Rd Wh l l l Figure 58 Alligator Clip Leads For this accessory an additional accuracy for parameters listed must be added to the standard instrument accuracy as defined by AutoAcc C 1 0 pF R 10 mQ R 5 106 Q 50 ppm for R gt 100 Q 4 Freq R 10 13 ppm Measurement accuracy is very sensitive to connection geometry The same connection geometry must be used for open short compensation as for connection to the device under test Connection to 7600 Plus Connect to 7600 Plus Cable Marking Color Connection to DUT PH potential high PH Red white Positive terminal of DUT IH current high IH Red Positive terminal of DUT PL potential low PL Black white Negative terminal of DUT IL current low IL Black Negative terminal of DUT Guard of DUT 83 7600 Plus LCR Meter 151053 A4 NOTE H and L denote polarity of AC test signal at 760
60. ignal type to test ff and V I This command should be set prior to setting the ACValue Set the AC signal to value test and 0 0 Set the bias to test and INT EXT or OFF Set the range test and ON OFF Set the measurement delay test and Stop on fail test and ON OFF Set primary amp secondary nominal values primary secondary floating point s Perform the Correction Measurement and set Load Correction to On Set Load Correction to ON valid only if a Correction Measurement has previously been made Set Load Correction to Off Set the time to hours minutes hh mm Set the date to month day year mm dd yyyy Set the front panel lockout off or on ON OFF Query the elapsed time the machine has run Query the calibration date Turn led backlite ON or set to screen save ON SAVE Caution Setting the remote LOCK out state with certain screens displayed on the unit can prevent one from entering or exiting lockout CALibrate DATA QUlckos 72 Returns the calibration data to the user Perform quick open calibration 7600 Plus LCR Meter 151053 A4 IEEE wait for SRQ OPC to indicate continue Send Send Receive Send Any command if desired to implement Fetch This will continue calibration Connect the Open Circuit Ensure that the open is connected to the instrument CONTINUE Wait for SRQ OPC operation complete IEEE only Perform quick short calibration Send Send Receive Send Receive
61. igure 51 Set Contrast 62 7600 Plus LCR Meter 151053 A4 Allows adjustment of contrast on the LCD display Use Up arrow to increase contrast or Down arrow to decrease When the instrument is powered up it returns to the last set contrast not some nominal level 2 9 13 Self Test When selected runs a group of internal self tests to verify that calibration and open short data are not corrupt 2 9 14 LCD Backlite Allows the backlite on the LCD display to be Save or On When set to Save the backlite turns off automatically if no keypad has been hit for 5 minutes and turns back on with the touch of START MENU or ENTER keys When set to On the backlite is constantly on The Save mode will prolong the life of the display 2 10 Input Output Interface The 7600 Plus comes standard with an automatic component handler I O interface port available through a 36 pin Centronics type connector located on the rear panel of the instrument This port outputs signals to indicate measurement in process measurement completed and bin sorting judgments The Handler Interface also has inputs for an external trigger signal and a safety interlock signal All output lines are negative true optically isolated open collector Pull up resistors to allow operation from 5V to 24V logic must be implemented externally Inputs are optically isolated and can be current driven from either positive or negative true logic Current limiting resistors to allow operati
62. il has been enabled or until the whole sequence has been completed Once a sequence is complete it will be binned to the first fail bin 1 thru 12 or if all tests pass binned into the overall pass bin 14 When a test sequence is turned on the results of the sequence are shown on the summary screen shown below Measured values outside of specified limits are highlighted FAIL BIN 5 Cs 1 561062 uF 0 0089290 Cs 1 498650 uF 0 0078950 Cs 1 278650 u 0 0067994 BZS Figure 37 Sequence Results 50 7600 Plus LCR Meter 151053 A4 2 8 Parameter Sweep The 7600 Plus is capable of displaying a table or plot of measured results vs a variable of frequency voltage or current Sweep can be selected as Off On or Edit Edit allows sweep test conditions to be changed 1 0 Analysis Utilities Sweep Parameter Freq MET EROTIC Sweep Begin 10 0 Hz 1 0000 kHz Sweep Step 25 50 100 200 Sweep Format Plot HIT MENU TO RETURN TO MAIN MENU Figure 38 Parameter Sweep Parameter is the variable test condition of Frequency Voltage or Current Sweep Begin is the lower boundary of the sweep table or plot in units of Hz Volts or Amps The numerical value is entered directly and units selected by UP DOWN arrow keys Sweep End is the upper boundary of the sweep in units of Hz Volts or Amps and entered the same as Sweep Begin Sweep Step is the chosen number of increments in a sweep of 25 50 100 or 200 where values are automatically s
63. imits are entered in terms of percent the same limits will automatically be shown in terms of absolute value on the Absolute Value Display Arrow up down left to right to select the nominal value or limit of interest as shown below The nominal value can be entered in the same fashion as the absolute limit is entered above numerical value then arrow Up or Down to select units Valid range is 108 to 109 If zero is entered for Nominal the entire row is cleared and that bin disabled The tolerance can be entered directly in increments of 0 01 any increments smaller than this are rounded to the closest 0 01 Valid range for each is 0 to 100 If zero is entered for Below or Above the previous value is cleared and that bin disabled Tolerance Percent i Nominal BELOW ABOVE Bi 1 100 00 k 10 00 10 00 2 110 00 k 10 00 10 00 y 3 120 00 k 10 00 10 00 4 130 00 k 10 00 10 00 5 140 00 k 10 00 10 00 6 150 00 k 10 00 10 00 gt 7 160 00 k 10 00 10 00 8 170 00 k 10 00 10 00 9 180 00 k 10 00 10 00 10 190 00 k 10 00 10 00 Figure 32 Tolerance Percent 2 7 20 Secondary Low Accepts entry of numerical value for the low limit of the secondary parameter Units are determined by the secondary parameter selection i e in Farads Ohms Henries etc and selected by the UP DOWN arrow keys Valid range is 103 to 104 NOTE Low limit must be less than the High limit 2 7 21 Secondary High Accepts entry of nume
64. ities Save Setup mmm 4 Recall Setup eee d delete tm y AutoAcc delete Open Short e Short Open Lock Out Lock Out with Setup Recall Quick Open amp Short Loek Out Only Calibration Set Time Date T D Usage Cal Date Set Contrast mm AN Self Test _ Messages LCD Backlite Save On 54 7600 Plus LCR Meter 151053 A4 2 9 4 Save Setup 1 0 Analysis Utilities Save DEFAULT USB 12345 1234 123 HIT MENU TO RETURN TO MAIN MENU Figure 43 Save Setup Allows a set of test conditions to be stored in instrument memory or on USB flash disk for later recall Test conditions are those that are user programmable in the Setup and I O menus To store the current set of test conditions as a new set in unit memory one needs to select NEW in the Save Setup menu and enter the identifying name up to 8 characters under which these conditions will be stored allowable characters from the keypad include 0 through 9 and minus characters can also include A through Z when operating from remote control To save the setup under the name selected or to overwrite if the name already exists one needs to answer Yes or No 1 0 Analysis Utilities SAVE AS 1234 Figure 44 Yes or No To make the current set of test conditions the default at power up one needs to select DEFAULT in the Save Setup menu and overwrite the conditions currently stored To prevent overwriting the default setup by mistake an add
65. itional level of safety exists where the operator is required to respond with Yes or No Selecting del will delete a set of test conditions and requires a Yes or No response When there are more setups than can fit on the display the page down key is active If there is less than a whole page below the display wraps around to the previous display 55 7600 Plus LCR Meter 151053 A4 Continuing to page down will eventually return to the first display of setups The page down key is only shown when there are more setups than what is visible There are two ways to make the current set of test conditions overwrite an existing setup one is to select that setup in the menu and answer Yes to overwrite and the other way is to enter the same name under New and answer Yes to overwrite File format for storing test conditions is the same as shown under Results to USB page 34 all lines shown are saved as setup The extension of a Setups file is c6r The setup files are compatible with 7600 Model B The only difference is the extension Changing the extension from Model B files to c6r will allow files to be recalled in the 7600 Plus 2 9 5 Recall Setup 1 0 Analysis Utilities Recall USB 12345 1234 123 HIT MENU TO RETURN TO MAIN MENU Figure 45 Recall Setup Allows a previously stored set of test conditions to be recalled from instrument memory Test conditions are those that are user programmable in the Setup and I O men
66. kHz to 1MHz 35 1 mV gt IMHz 250 uA to 100 mA short circuit in 50 LA steps Current Max Compliance 3V lt 500kHz 1V from 500kHz 1MHz 0 5V gt IMHz Accuracy 5 50 LA lt 100kHz Bias Voltage Display viii 10 50 HA 100kHz to 500kHz 20 50 HA 500kHz to 1MHz 35 50 uA gt 1MHz Internal 2 0 V External 0 to 200 V LCD Graphics with adjustable contrast and back light Results of Dual Measurement Parameters in engineering 7 digits or scientific 5 digits notation Deviation from Nominal of Primary Parameter Yo Deviation from Nominal of Primary Parameter Instrument Setting and Test Conditions 7600 Plus LCR Meter Limit Detection Interfaces Front Panel Environmental Mechanical Power Requirements Other Features Supplied 151053 A4 Bin Limits and Pass Fail Results Plot of Primary Measurement Parameter vs Test Conditions Table of Measurement Parameters vs Test Conditions Sequenced Test Results Summary 15 bins total 10 pass 4 fail 1 no contact Standard RS 232 Handler Printer Port USB Optional IEEE488 2 Four terminal BNC MIL T 28800E Type 3 Class 5 Style E amp F Operating 00to 500C Storage 10 to 600 C Humidity lt 75 for 119 Cto 30 C operating Altitude lt 2000m Installation Category 1 Pollution Degree 1 Bench mount with tilt bail Dimensions w x h x d 410 x 150 x 360mm Weight 8kg net 10 5kg shipping 90
67. labels in between chosen logarithmically The vertical axis is labeled from the lowest measured value to the highest measured value with four additional labels in between chosen linearly 2 9 Median Allows for the selection of Median measurement mode to be On or Off When selected each measurement will actually be three individual measurements the lowest and highest values discarded and the median value displayed Measurement accuracy can be improved as noted below and will be indicated on the AutoAcc display but never less than 0 05 for primary parameter or 0 0005 for secondary parameter With Median set to On Divide the primary accuracy by the square root of three Divide the secondary accuracy by the square root of three 2 9 1 Distortion Detection Allows for the selection of Distortion Detection mode to be On or Off When set to On the unit will detect distortion during a measurement and indicates the message DISTORTION if this condition occurs When set to Off distortion will not be detected during a measurement 52 7600 Plus LCR Meter 151053 A4 Distortion is dependent on programmed test conditions connection to the device device impedance and so indicated when the signal noise distortion divided by the signal exceeds 1 2 Distortion set to On is the recommended test condition and is particularly important for high precision measurements where test leads could resonate with the device under test Distortion may w
68. limit format bin 2 0 00000000000000000000 slow limit bin 3 0 00000000000000000000 high limit bin 3 0 00000000000000000000 nominal value bin 3 0 000000 limit format bin 3 0 00000000000000000000 slow limit bin 4 0 00000000000000000000 high limit bin 4 36 not printed 151053 A4 7600 Plus LCR Meter 0 00000000000000000000 nominal value bin 4 0 000000 limit format bin 4 0 00000000000000000000 slow limit bin 5 0 00000000000000000000 high limit bin 5 0 00000000000000000000 nominal value bin 5 0 000000 limit format bin 5 0 00000000000000000000 slow limit bin 6 0 00000000000000000000 high limit bin 6 0 00000000000000000000 nominal value bin 6 0 000000 limit format bin 6 0 00000000000000000000 slow limit bin 7 0 00000000000000000000 high limit bin 7 0 00000000000000000000 nominal value bin 7 0 000000 limit format bin 7 0 00000000000000000000 slow limit bin 8 0 00000000000000000000 high limit bin 8 0 00000000000000000000 nominal value bin 8 0 000000 limit format bin 8 0 00000000000000000000 slow limit bin 9 0 00000000000000000000 high limit bin 9 0 00000000000000000000 nominal value bin 9 0 000000 limit format bin 9 0 00000000000000000000 slow limit bin 10 0 00000000000000000000 high limit bin 10 0 00000000000000000000 nominal value bin 10 0 000000 limit format bin 10 0 00000000000000000000 slow limit bin 11 0 00000000000000000000 shigh limit bin 11 0 00000000000000000000 nominal value bin 11 0 000000
69. lt conditions Sequence Setup Test 1 Test 1 Status Enable Primary Parameter Secondary Parameter Frequency 1 0000kHz DC Bias Voltage Oft ai Ext AC Signal Type Current AC Signal Value 1 000 V Measurement Delay ms 0 Range Hold Off Key Stop on Fail JON Binning HIT MENU TO RETURN TO MAIN MENU Figure 34 Sequence Setup Test Conditions 48 7600 Plus LCR Meter 151053 A4 If Range Hold is turned ON and this is the first sequence measurement for each test the 7600 Plus automatically finds the correct range and completes a measurement this range is saved for all future measurements for that sequence only It is important that the first part be good for the range hold to select the correct range To repeat an auto range selection turn sequences off and then back on again making the next measurement taken the first sequence measurement Test conditions for each setup are selected as shown above except for the primary parameter secondary parameter and binning these are selected on individual menus as shown below To change test conditions on any or all six tests select Prev Test or Next Test to access test conditions for that test Sequence Setup Test 1 HIT MENU TO RETURN TO MAIN MENU Figure 35 Sequence Setup Parameter Selection Bin assignment in the test sequence mode is defined as follows Bin Assigned Bin 1 Test 1 Primary parameter fail Bin 2 Test 1 Secondary parameter fail Bin 3 T
70. measurement conditions open short corrections and measured values Data Formats Data will be transmitted in ASCII NR3 format per IEEE488 2 sec 8 7 4 and reproduced below Note that there is always precisely one digit before the decimal point and precisely three digits in the exponent Multiple results For the case where a measurement produces multiple results e g MEASure Cs and DF the individual numbers will be separated by commas per IEEE488 2 para 8 4 2 2 Sequences of Test Sequence Mode will be treated as a single Message Unit with results separated by commas If a particular test has None selected as a secondary parameter no place will be reserved for the null result As an example a sequence of three tests asking for C D ESR and Z would appear as follows lt data gt lt data gt lt data gt lt data gt lt data gt lt NL gt All response messages will be terminated by the NL character together with the EOI line asserted Status Byte Register Decimal Bit Value Use 7 128 None 6 64 SRQ SPOL Resets 5 32 Summary of Standard Event Status Register 4 16 Message Available 3 8 None 2 4 None l 2 None 0 l None The Status Byte Regester is readable via the standard STB as defined in para 11 2 2 2 of the IEEE spec The 7600 Plus will also implement an SRE register to enable each bit of the Status Byte Register per para 11 3 2 of the IEEE spec This register shall be readable by a SRE command and writeable
71. mit format bin 11 0 00000000000000000000 slow limit bin 12 0 00000000000000000000 high limit bin 12 0 00000000000000000000 nominal value bin 12 0 000000 limit format bin 12 151053 A4 37 7600 Plus LCR Meter 151053 A4 0 00000000000000000000 slow limit bin 13 0 00000000000000000000 high limit bin 13 0 00000000000000000000 nominal value bin 13 0 000000 limit format bin 13 0 00000000000000000000 slow limit bin 14 0 00000000000000000000 high limit bin 14 0 00000000000000000000 nominal value bin 14 0 000000 limit format bin 14 not printed 0 000000 secondary low 0 000000 secondary high 0 000000 sequence 0 000000 sequence status printed only if sequence enabled 1000 000000 sequence frequency 0 000000 sequence pri param 0 000000 sequence sec param 0 000000 sequence bias 0 000000 sequence ac signal type 1 000000 sequence ac signal value 0 000000 sequence delay 0 000000 sequence range 0 000000 sequence range relay 0 000000 sequence relay 2 0 000000 sequence relay 3 0 000000 sequence var relay 1 000000 sequence stop on fail 0 000000 sequence status 1000 000000 sequence frequency 0 000000 sequence pri param 0 000000 sequence sec param 0 000000 sequence bias 0 000000 sequence ac signal type 1 000000 sequence ac signal value 0 000000 sequence delay 0 000000 sequence range 38 7600 Plus LCR Meter 0 000000 sequence range relay 0 000000 sequence relay 2 0 00000
72. mpers are discussed below The operation of START and TRIG circuits is identical Both inputs are active low for optical isolation they require a positive 5 to 24V external source and current limiting resistor to operate START is always optically isolated TRIG can be converted to a isolated active low input by removing jumper JP2402 on the I O PCB Both signals are open collector OR ed on the I O PCB current flowing through the isolator input on either signal causes a single Start line to be pulled low The INTerlock signal can be optically isolated and also requires a positive 5 to 24V external source and current limiting resistor to operate This signal can be converted to a isolated active low input by removing jumper JP2403 on the I O PCB Current flowing through the isolator input causes the internal Interlock line to be driven low All bin and control outputs can be active low optically isolated open collector drivers that pull each signal line to IGND isolated common when asserted All outputs require a positive 5 to 24V external source referenced to IGND and pull up resistor to operate as fully isolated signals IGND can be isolated from system GND by removing jumper JP2401 on the I O PCB With jumper JP2401 in place optical isolation is defeated which allows the outputs to be pulled up to the system 5V with external resistors 10 us min Active _ START EOT n n pin 31 floating EOT pin
73. mponent type the primary and secondary default could be Cs amp DF Rs 8 Q or Ls amp Q The parameter selection can be chosen by the operator through menu selection Besides Auto the following selections are possible and discussed in more detail below Cs Capacitance in farads IZ Impedance in ohms Cp Capacitance in farads Y Admittance in siemens Ls Inductance in henries 0 Angle in degrees Lp Inductance in henries ESR Equivalent series resistance in ohms Rs Resistance in ohms Gp Conductance in siemens Rp Resistance in ohms Xs Reactance in ohms DF Dissipation Factor no units Bp Susceptance in siemens Q Quality Factor no units s series equivalent circuit p parallel equivalent circuit 14 7600 Plus LCR Meter 151053 A4 An impedance that is neither a pure resistance nor a pure reactance can be represented at any specific frequency by either a series or a parallel combination of resistance and reactance Such a representation is called an equivalent circuit The value of the primary measurement of a device depends on which equivalent circuit series or parallel is chosen to represent it The manufacturer or user of a device specifies how a device is to be measured usually series and at what frequency If this is not known be sure to specify if the results were series or parallel and what the measurement frequency was Series and parallel equivalent circuits for a lossy inductor and lossy capaci
74. mponents of the same nominal value whose actual values spread across the boundary of two ranges If allowed to auto range the units and decimal point can change with the range and confuse the operator It is important to note that when a range is held which is not the range the instrument auto ranging would have selected some accuracy may be sacrificed 21 7600 Plus LCR Meter 151053 A4 Under certain circumstances high Q inductors can cause extraneous overload conditions if they are tested at frequencies where the inductor resonates with the test leads This situation can be avoided by one or more of the following test at a voltage substantially below full scale voltage for a given range use low capacitance cables or test at a frequency below the resonant frequency of the inductor with the test leads 2 6 8 Range Locked Accepts entry of selected measurement ranges between 0 and 59 as listed below 0 for no range locked and others for the selected range Measurement ranges are a function of the impedance being measured Z selected test frequency F and ac test voltage V For best measurement results the instrument is generally recommended to operate with Range Hold to Off and Range Locked to 0 It is possible to calculate a range based on Z F and V as detailed below AC Signal Voltage Mode Measurement Range s Determine Range where R R1 R2 R3 where RI land K 10 pA if F lt 25 kHz and lt 10 LA 17 and K 1
75. n With AGGESSOTI E yode ye ros bondage kata p t naad ss 80 2 14 1 Rack Mount Kit 7000 00 nvsrrveroververeveten ser desa asdessosesesosososvssawanste 81 2 14 2 BNC Cable Set 1 Meter 1689 9602 2 Meter 1689 9602 02 81 2 14 3 Kelvin Clip Leads 1700 03 reren desh Pa el ea 81 2 14 4 Alligator Clip Leads O ofis 83 2 14 5 Chip Component Tweezers 7000 05 84 2 14 6 Low V Axial Radial Lead Component Test Fixture 7000 06 85 2147 Open Short Zeros rente besoin rite lese da dik peeve A kk a A leds 86 2 14 8 Low V Chip Component Test Fixture 7000 07 eneen 86 2 14 9 Calibration Kit 7000 09 nrs tea 88 2 14 10 Connection to Type 874 Connectors anneer ee enne renners 89 A ai a A n eenen nd an ce tas ete teen 90 a AENEON ke a Tan 93 4 1 Basic Instrument Architecture siennes 93 4 J4 a AA 93 41 2 Power Supply a a swe poo ine es ka pye 93 ill 7600 Plus LCR Meter 151053 A4 4 13 BCD Display Keypad Panels smse fi cm kota sa ae e pan aa sa ko e mechan 93 4 2 7600 Plus Instrument MOE smeten 94 42 1 Sme Wave Generator si nieeenke eee 94 4 2 2 Voltage Detector Channels attente load 94 4 23 Current Detector AAA a E E R 94 AAA DN T neee 94 ADS Digital Signal POCO hoen ee ae ob se ata seve ede 94 4 3 OPI atada 94 4 3 1 IEEE 488 Board amp Cable ui keerde 94 5 Maintenance amp Calibration de es 95 5 1 Bias Voltage Fuse Replacement rss nn means 95 5 2 Resetting of Time and Date ooo ee e e al l
76. n of the sine wave to obtain phase information 4 2 5 Digital Signal Processor The digitized voltage and current signals are applied to a high speed Digital Signal Processor where a mathematical algorithm similar to a Fast Fourier Transform extracts the in phase and quadrature portions of the signal This information is then used to calculate the complex impedance Z and the complex admittance Y of the unknown These results are then used to compute the parameters requested by the user i e C R L D Q etc 4 3 Options 4 3 1 IEEE 488 Board amp Cable Discontinued Control available through the keyboard or available for display can be accessed over this interface This board is mounted at the right rear of the unit stacked above the processor board Connection to the IEEE 488 connector is via an interconnecting cable IEEE option is 7000 22 94 7600 Plus LCR Meter 151053 A4 5 Maintenance amp Calibration Our warranty at the front of this manual attests to the quality of materials and workmanship in our products If malfunction should be suspected or other information be desired applications engineers are available for technical assistance Application assistance is available in the U S by calling 800 253 1230 and asking for Applications Support For support outside of the United States please contact your local IET Labs Distributor 5 1 Bias Voltage Fuse Replacement A There are two bias voltage fuses The fuses are typ
77. n the rear panel This interface can be used to connect to a system containing a number of instruments and a controller in which each meets IEEE Standard 488 2 Standard Digital Interface for Programmable Instrumentation Refer to Table 3 for the command set The following functions have been implemented Refer to the standard for an explanation of the function subsets represented by the identifications below 68 7600 Plus LCR Meter 151053 A4 SHI Source Handshake PPI Parallel Poll AHI Acceptor Handshake DCI Device Clear T5 Talker DT1 Device Trigger ES Listener CO Controller SRI Service Request E2 Electrical Interface RL1 Remote Local Table 3 IEEE amp RS 232 Commands Command Function Parameter s CONFigure FREQuency Set the frequency from 10 to 2000000 Hz 0000000 00 PPARameter Set the primary parameter A auto CS CP LS LPRPRSDFQZY P phase angle ESR GP XS BP SPARameter Set the secondary parameter N none CS CP LS LP RPRSDFQZY P phase angle ESR GP XS BP ACTYpe Set the AC test signal type to VI This command should be set prior to setting the ACValue ACValue Set the AC signal to value 0 0 BIAS Set the bias to INT EXT or OFF RANGe Set the range AUTO or HOLD or 1 59 MACcuracy Set the measurement accuracy SLOw MEDium FASt TDELay Set the measurement delay HH AVERage Set to average HHH MEDian Set the median function to ON or OFF ON OFF DISTortion Set distortion detection to ON or OFF ON OFF CCHeck Set the contact check to ON or O
78. nal source Power switch Turns main power to instrument on or off Keypad 12 For making numerical entries as labeled 0 through 9 minus sign and decimal Input Panel BNC connectors to DUT 7 8 inch spacing IL Current low PL Potential low PH Potential hieh Figure 2 Front Panel Controls amp Indicators 7600 Plus LCR Meter 151053 A4 Figure 3 shows the controls and indicators on the rear panel of the 7600 Plus RS232 Connector Connection according to RS232 std interface Type DB9 9 pin male connector Bias Voltage External bias input maximum of 200Vdc Contains FO 25A 250V 5x20mm fast blow fuse Replace only with the same type and rating IEEE 488 2 Input output connections according to IEEE STD 488 2 24 pin socket for standard IEEE 488 cable Parallel Port Connection to parallel printer Type DB25 25 pin female connector AC Inlet Module AC power input filtering fusing and switching Use with Belden SPH 386 y implemented socket or equivalent Fuse Drawer Contains T2 5A 250V 5x20mm time delay fuse for 115 or 220V operation Maples only 1 O Port Connection to component with the same and rating handler 36 pin Amp connector mates ype with Amp 552302 1 plug and 552073 5 strain relief cover or ribbon cable clamp connector 553600 1 or equivalents Figure 3 Rear Panel Controls X Indicators 7600 Plus LCR Met
79. ocal representative Retain the shipping carton and packing material for future use such as returning for re calibration or service 1 2 Product Overview The 7600 Plus Precision LCR Meter is an automatic user programmable instrument for measuring a wide variety of impedance parameters The 7600 Plus covers a frequency range from 10 Hz to 2 MHz with a basic measurement accuracy of 0 05 The instruments high resolution graphics display and keypad makes for easy menu programming Test conditions are stored and recalled from internal memory eliminating wasted measurement setup time Extensive pass fail binning capability and measurements speeds of up to 120 sec makes the unit well suited for production applications The instruments unique measurement sequencing allows up to six parameters to be measured on a single pass Additionally a parameter can be plotted against a test condition variable an invaluable technique for component design and product evaluation The 7600 Plus comes with RS 232 I O port handler USB host port and parallel interfaces all standard for remote control operation and communication with other instrumentation The USB host port is included for program data storage of test conditions and measurement results and for transferring these files to a PC The 7600 Plus can be used with most USB memory sticks that are FATI6 FAT32 format maximum consumption current must be below 500 mA The memory stick can be installed and
80. oltage Ext Range Hold n Range Locked Measurement Accuracy Measurement Delay ms to Average Contact Check Figure 7 Setup Menu The first of the four main menus is Setup shown above Each function controls a 7600 Plus measurement condition and is described in detail below Setup IO Analysis Utilities Primary Parameter mmm Auto Cs Secondary Parameter None Cp DF Ls Frequency numeric entry Q Lp ESR Rs AC Test Signal Voltage 0 Rp Current Rs DF Value numeric entry Rp DC Bias Voltage Off a Si Int Ext Cp 9 Ls ESR Range Hold Off Lp Gp On IZI Xs Range Locked numeric entry Ml BP Measurement Accuracy Fast Bp Medium Slow Measurement Delay numeric entry to Average numeric entry Contact Check Off On 13 7600 Plus LCR Meter 151053 A4 2 6 2 Primary Parameter Setup Analysis Utilities Pri Param 4 y HIT MENU TO RETURN TO MAIN MENU Figure 8 Primary Parameters Additional Parameters not shown and selected by UP DOWN arrow keys include 6 IESRI Gp Xs Bp Any combination of two parameters can be measured and displayed simultaneously on the 7600 Plus one referred to as the Primary displayed first and the other the Secondary The instrument as powered up provides a default primary parameter selection of Auto a feature which enables any passive component to be measured without knowing what type of component it is Depending on the co
81. on from 5V to 24V logic must be implemented externally Refer to Table 1 for signal names pin numbers and functions as necessary for cable connections 63 7600 Plus LCR Meter 151053 A4 Table 1 I O Interface Connections Signal Name Pin Number Function Binl l Bin Sorting Results Bin1 Bin10 Bin2 19 All signals active low open collector Bin3 2 Bin4 20 Bin5 3 Bin6 21 Bin7 4 Bin8 22 Bin9 6 Bin10 24 Bin11 7 Primary parameter pass secondary fail low Bin12 25 Primary parameter pass secondary fail high Bin13 8 Primary parameter fail secondary pass Bin14 26 Primary parameter fail secondary fail Bin15 9 No Contact Bin16 27 Unused EOT 29 End of Test test completed bin and measurement data valid BUSY 30 Measurement comparison in progress TRIG 14 Trigger high input TRIG 16 Trigger low input START 34 Isolated Trigger high input START 35 Isolated Trigger low input source GND 11 15 33 System common IGND 5 10 23 28 Isolated common 5V 12 32 System 5V through 100 Q INT 13 Interlock high input from external source HTC 31 Handler timing control Pin Configuration Viewed from Rear Panel 64 7600 Plus LCR Meter 151053 A4 CAUTION Do not apply an external source in excess of 5 volts with jumpers JP2401 JP2402 or JP2403 in place otherwise the instrument can be damaged The instrument is shipped with these jumpers in place and must be removed for optical isolation These ju
82. onnecting the anode to the external supply and sinking current through the cathode will result in active low drive No provisions for current limiting resistors are provided on board All inputs are reverse bias protected max 5V reverse voltage 50mA 60mW 2 11 Parallel Interface The 7600 Plus comes standard with a parallel printer port available through a connector 25 pin on the rear panel of the instrument This is a standard PC compatible interface for connection to a printer Refer to Table 2 for signal names pin numbers as necessary for cable connections 67 7600 Plus LCR Meter 151053 A4 Table 2 Parallel Interface Connections Signal Name Pin Number Function Outputs STROBE l Indicates that data is ready to read 0 2 Data bit 1 DI 3 Data bit 2 D2 4 Data bit 3 D3 5 Data bit 4 D4 6 Data bit 5 DS f Data bit 6 D6 8 Data bit 7 D7 9 Data bit 8 AUTOFD 14 Auto paper feed INIT 16 Initializes printer SLCT IN 17 Selects printer GROUND 18 25 Signal ground Inputs ACK 10 Indicates that data has been received and printer is ready to accept more data BUSY 11 Indicates that printer can not receive data PE 12 Indicates that printer is out of paper SLCT 13 Indicates that printer is ready to receive data ERROR 15 Indicates printer error 13 1 Pin Configuration Viewed from Rear Panel 2 12 IEEE 488 2 Interface Optional The 7600 Plus has an optional IEEE 488 interface with connection through a connector 24 pin o
83. onnection to 7600 Plus Connect to 7600 Plus Cable Marking Connection to DUT PH potential high PH Rd Wh or HS to positive terminal of DUT TH current high IH Rd or HD to positive terminal of DUT PL potential low PL Bk Wh or LS to negative terminal of DUT 84 7600 Plus LCR Meter 151053 A4 IL current low IL Bk or LD to negative terminal of DUT The PH HS and IH HD cables connect to the fixed arm of the tweezers and the PL LS and IL LD cables connect to the movable arm of the tweezers To ensure valid measurements it is especially important to observe the correct polarity when DC bias is to be used 2 14 6 Low V Axial Radial Lead Component Test Fixture 7000 06 The 7000 06 Test Fixture along with the BNC to BNC cable provided is a method of convenient reliable guarded 4 terminal connection of radial and axial leaded sensors and components to the 7600 Plus The 7000 06 consists of the test fixture and two axial lead adapters l Mi A WARNING SHOCK HAZARD LEN HIGH VOLTAGE MAY APPEAR ON TERMINALS EE Ebertin Rotated 90 degrees i tomen martens oy GenRad as shown 1689 9600 DIGIBRIDGE REMOTE TEST FIXTURE Axial Lead Adapter Figure 60 Low V Axial and Radial Lead Component Test Fixture For this accessory an additional accuracy must be added to the standard instrument accuracy as defined by AutoAcc For 1 MHz Special Case Accuracy Primary readings 0 06 S
84. or External 32 7600 Plus LCR Meter 151053 A4 e Internal Measurement trigger is automatic and continuous once initiated with a START If the STOP key is pressed in the middle of a measurement with Range Hold set to OFF any measurement range indication or displayed results is invalid e External Measurement trigger is under remote control via front panel handler RS 232 or IEEE 488 interface 2 7 11 Handler Interface Allows user to turn Handler Interface function On or Off When On is selected the input and output lines on the rear panel I O interface connector are acknowledged When Off is selected they are ignored 2 7 12 RS 232 Interface Analysis Utilities Baud LE O 96 Parity None Kerr Even Data Bits Stop Bits 1 Mode Talk Talk Listen State Enable HIT MENU TO RETURN TO MAIN MENU Figure 25 RS 232 Setup Format Allows user setup of standard RS 232 interface formats Choices include Baud Rate 12 24 48 or 96 for 1200 2400 4800 and 9600 respectively Parity None Even or Odd Data Bits 7or8 Stop Bits lor2 Mode Talk or Talk Listen UP DOWN arrow and Enter selects the desired format and then LEFT RIGHT arrow and ENTER allows for selection of choices within each format 33 7600 Plus LCR Meter 151053 A4 2 7 13 IEEE 488 2 Interface for use with 7000 22 Discontinued Analysis Utilities Address 4 Mode Talk Talk Listen State Enable HIT MENU TO RETURN TO MAIN MENU Figur
85. or any indirect special or consequential damages even if notice has been given to the possibility of such damages THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE A WARNING A OBSERVE ALL SAFETY RULES WHEN WORKING WITH HIGH VOLTAGES OR LINE VOLTAGES Dangerous voltages may be present inside this instrument Do not open the case Refer servicing to qualified personnel HIGH VOLTAGES MAY BE PRESENT AT THE TERMINALS OF THIS INSTRUMENT WHENEVER HAZARDOUS VOLTAGES gt 45 V ARE USED TAKE ALL MEASURES TO AVOID ACCIDENTAL CONTACT WITH ANY LIVE COMPONENTS USE MAXIMUM INSULATION AND MINIMIZE THE USE OF BARE CONDUCTORS WHEN USING THIS INSTRUMENT Use extreme caution when working with bare conductors or bus bars WHEN WORKING WITH HIGH VOLTAGES POST WARNING SIGNS AND KEEP UNREQUIRED PERSONNEL SAFELY AWAY A CAUTION A DO NOT APPLY ANY VOLTAGES OR CURRENTS TO THE TERMINALS OF THIS INSTRUMENT IN EXCESS OF THE MAXIMUM LIMITS INDICATED ON THE FRONT PANEL OR THE OPERATING GUIDE LABEL Contents l PATOU BEHO ay ae ad at bad ata aaa d Sa kaa e vk nea Ano ana de paske ren tante etats hand l 1 1 Unpacking and Inspection en sitan kaa kk pik ey date alleeen ende deet l 12 Product Overview naine haine Maas a dawg aa any adapts Renee l 1 3 Controls and Indicators nissan ae 2 EA Accessories NCU A ka e n e a
86. or restoring loss of contrast 1 Consider the SELECT buttons as labeled 1 2 3 and 4 from top to bottom 2 Turn the instrument on and wait 10 seconds 95 7600 Plus LCR Meter 151053 A4 Press MENU key twice Press SELECT 4 one time Press SELECT 1 three times Press ENTER Press SELECT 1 many times till contrast returns to normal Press ENTER Arrow up to SAVE SETUP and save as DEFAULT AN Aa n B Lo If the above procedure fails to restore the contrast try repeating Failing restoration of the contrast may be indication of another instrument problem 54 Calibration Calibration of the 7600 Plus Precision LCR Meter is recommended on an annual basis If the unit is to be returned to IET Labs for factory calibration refer to section 5 4 2 for instructions Using the procedure below the instrument can also be calibrated by a qualified service person if traceable calibration equipment and standards are available CAUTION To ensure maximum stability the instrument should be powered up for a minimum of 1 hour before calibration 5 4 1 Requirements for Re calibration Temperature stabilized room at 23 degrees C 73 4 F IET Labs 7000 09 Calibration Kit 1 Select CALIBRATION on the Utilities menu 2 Once ENTER is selected the calibration code of 7600225 must be entered to continue This code is to prevent unauthorized personnel from effecting the instrument calibration For security reasons it may be
87. pecified Vps 5 0 for 1 000V lt Vg lt 5 000V 1 0 for 0 100V lt Vs lt 1 000V 0 1 for 0 020V lt Vs lt 0 100V For Zm gt 4 ZRANGE multiply A by 2 For Zm gt 16 ZRANGE multiply A by 4 For Zm gt 64 ZRANGE multiply A by 8 In Voltage Mode In Current Mode where 100kQ for Zm gt 25kQ 4000 for i lt 2 5mA ZRANGE 6kQ for 1 6kQ lt Zm lt 25kQ 250 for i gt 2 5mA 6kQ for Zm gt 25kQ and Fm gt 25kHz 4000 for 1000 lt Zm lt 1 6kQ 4000 for Zm gt 1 6kQ and Fm gt 250kHz 250 for Zm lt 1000 NOTE Calculated Rs accuracy applies only when device under test is primarily reactive Calculated ESR accuracy applies only when device under test is primarily capacitive The unit is unspecified for Fm gt 1 0 MHz and Vs gt 0 5V and for Fm gt 500 kHz and Vs 1 0V D Accuracy Q Accuracy 0 0 0 A Dl E Ak oro As 2 100 50 5 10 100 100 50 100 500 0 Accuracy ESR Accuracy 20 7 100 D DF of unknown Q Q of unknown A calculated primary accuracy for all cases 1 MHz Special Case Accuracy 1 MHz C 100pF to 1000 pF Zm 158 to 1 6kQ D or Q lt 0 01 voltage mode Vs lt 1V Fast Mode Accuracy 58 7600 Plus LCR Meter 151053 A4 A 2 Vs V A 1 067 ki 24 Ea r 4 05 K 0 05 V 4 Yo Ss An nominal accuracy 0 5 Medium Mode Accuracy 2 Y A 2 2 067 0 8424 CVa A 05 K 0 05 Vo 4 Vee An nominal accuracy 0 25 Slow
88. r currently selected test conditions or as a tool so the operator can see what the accuracy would be if certain conditions were selected AutoAcc 1 0000kHz 4 EXEC Slow Freq Average 1 AC Signal 1 000 V Median Koi on y Arrow keys to select parameters ENTER key to change the values START key to calculate accuracy Accuracy as Configured Cs 075 DF 0005000 Figure 46 Setup Accuracy The basis for the AutoAcc calculation is based on the formulas below where A calculated primary accuracy for C X B with D 0 1 and R L G with Q 0 1 for optimum signal levels and test conditions For C X and B with D gt 0 1 multiply A by 1 D For R and G with Q gt 0 1 multiply A by 1 Q 1 Ki A For L with Q lt 10 multiply A by Q Multipliers do not apply to 1 MHz Special Case Accuracy For Fast Mode R L C X G B IZI and IYI 2 IZ V V 4 10 F Ss Ss For Medium Mode R L C X G B IZI and YI Va Y F wazonzsa onse ef vaarde E oss m x Zan Y For Slow Mode R L C X G B IZI and IYI Va 1 F A 10 025 0 025 27 z 1077 02 gele Vel e 07 En 300 K Z V V 4 10 m Ss Ss Vs Test voltage in voltage mode I Zm in current mode Zm Impedance of DUT Fm Test frequency Kt 1 for 180 to 280C 2 for 8 to 38 C and for 4 for 59 to 45 C 57 7600 Plus LCR Meter 151053 A4 For I Zm gt 3 accuracy is not s
89. re that the standard is connected to the instrument CONTINUE IEEE wait for SRQ OPC to indicate gain cal is done Send Send Receive Send Any command if desired to implement Fetch This will continue calibration Connect the open circuit Ensure that the open is connected to the instrument CONTINUE IEEE wait for SRQ OPC to indicate open circuit cal is done Send Send Receive Send Any command if desired to implement Fetch This will continue calibration Connect the short circuit Ensure that the standard is connected to the instrument CONTINUE IEEE wait for SRQ OPC to indicate short circuit cal is done Send Send Receive Send Send Send Receive Any command if desired to implement Fetch This will continue calibration for the Connect the standard Ensure that the standard is connected to the instrument CONTINUE Any command if desired to implement Fetch This will continue calibration Get prompt for Rnom and Qnom values at 1 kHz 7600 Plus LCR Meter 151053 A4 IEEE wait for SRQ OPC to indicate current standard cal is done Send Any command if desired to implement Send Fetch Receive Get prompt for Rnom and Qnom values at 1 MHz or 50 kHz IEEE wait for SRQ OPC to indicate range cal is done Send Any command if desired to implement Send Fetch after last standard IEEE wait for SRQ OPC RS232 wait for Complete MEASure Triggers a measurement of the selected type If sequence or sweep is
90. removed at anytime The USB stick is automatically mounted when installed The USB host port complies with USB v2 0 standard The USB host port is not designed to be connected to a PC Printer or USB hub Figure 1 7600 Plus Precision LCR Meter 7600 Plus LCR Meter 151053 A4 1 3 Controls and Indicators Figure 2 shows the controls and indicators on the front panel of the 7600 Plus CNCL key Exits an active field in vertical or horizontal selections clears entry on fields when pressed once and exits fields when pressed twice Select keys 4 Soft key functions as indicated on the adjacent LCD display from top to bottom functions such as up down right or left arrow during menu selection other functions such as measurement units exponent Y or N yes or no and del delete MENU key Enters menu display made or exits sub menu back to main menu Graphics display Displays test conditions measured results instrument status and user interface menus USB Host Pass Fail indicator Indicates measurement results based on entered test limits IET Labs STOP key Stops the measurement process 7600 Plus p Precision LON Meter Version 1 22 START key Starts the Sf measurement process ENTER key Switches user to entry mode or accepts menu entry as entered Voltage Indicator Indicates when de bias voltage is called for or applied to rear panel connectors from exter
91. rent limiting voltage supply is recommended with a limit set at 200 mA e The bias supply must be floating DO NOT connect either side to ground When using a single polarity supply for positive or negative biasing observe proper polarity when connecting to the 7600 Plus For positive bias the positive output of the supply must be connected to Bias Voltage and the negative to Bias Voltage The 20 7600 Plus LCR Meter 151053 A4 opposite is true for negative bias the negative output of the supply must be connected to the Bias Voltage and the positive to Bias Voltage e Generally the external circuit must provide switching for both application of bias after the device is connected and discharge before it is removed e A well filtered supply is recommended Hum can affect some measurements particularly at power line frequencies When applying a bias voltage there are effects to be aware of in watching for stabilization of the DUT voltage and capacitance Besides charging to a final voltage there is also the stabilization of capacitance value itself For example some electrolytic capacitors respond slowly to a change in applied voltage therefore the capacitance can be changing well after the voltage is stable In general DC bias should only be applied to capacitors unreliable measurement results can occur if DC bias is applied to low impedance devices When applying external bias on capacitors below 200pF with an AC signal level belo
92. rical value for the high limit of the secondary parameter Units are determined by the secondary parameter selection i e in Farads Ohms Henries etc and selected by the UP DOWN arrow keys Valid range is 103 to 104 NOTE High limit must be greater than the Low limit 47 7600 Plus LCR Meter 151053 A4 2 7 22 View Bin Totals Low LIMIT High LIMIT Total 90 00 k 110 00 k 250 100 00 k 120 00 k 110 00 k 130 00 k 120 00 k 140 00 k 130 00 k 150 00 k PRI Pass SEC Fail LOW PRI Pass SEC Fail HI PRI Fail SEC Pass PRI Fail SEC Fail NO CONTACT Pass 595 Fail 190 HIT MENU TO RETURN TO MAIN MENU Figure 33 Bin Totals The total count for each bin is tracked from 0 to 999 999 2 7 23 Zero Bin Totals Bin count totals are all reset to zero when selected and returned to the Menu screen 2 7 24 Test Sequencing The 7600 Plus is capable of performing a sequence measurement containing up to six different test steps Different measurement parameters and conditions can be defined for each test in the sequence Test sequencing can be selected as Off On or Edit Edit allows measurement parameters and test conditions to be changed for all six tests It is important to note that tests can only be enabled in sequence for example one can enable tests 1 through 3 but not tests 1 and 3 only i e it is not possible to skip a test For optimum measure speed performance whenever possible set test conditions of test 1 to be the same as defau
93. rting block equivalent to spacing of the device under test Use of this fixture may result in an incremental error due to residuals at DUT terminals Verify with a known standard and apply this offset to final measurements Same as DUT S width DA te Tightening Screw LA kwen l 87 7600 Plus LCR Meter 151053 A4 2 14 9 Calibration Kit 7000 09 The 7000 09 Calibration kit consists of four calibration resistors an open circuit module and a short circuit module These standards are NIST traceable and used to re calibrate the 7600 Plus Precision LCR Meter The four calibration resistors have nominal values of 24 9 374 Q 5 97 and 95 3 KO R and Q values are given for all four resistors at 1 kHz R and Q values are also given at 25 kHz for the 95 3 KQ resistor 250 kHz for the 5 97 kQ resistor and both 500 kHz and 1 MHz for the other two resistors Use the 1 MHz for calibration of 7600 Plus Refer to Calibration on page 96 GED ter Lass Inc Figure 62 Calibration Kit 88 7600 Plus LCR Meter 151053 A4 2 14 10Connection to Type 874 Connectors There are times when it may be desirable to connect the 7600 Plus to type 874 coaxial connectors that are found on some impedance standards This connection can be made using either the 1689 9602 or 1689 9602 02 BNC to BNC Cable two BNC Tees and two BNC to 874 adapters see below Pa Tee Cables from To 874 on Impedance Standard 7400 7500 p BNC to 874 Figure 63 Connection to
94. ry parameter must be set not NONE and secondary low high limits must be set non zero These are assigned as follows Bins 1 through 10 Pass bins for the primary parameter Pass for secondary parameter if limit is entered Bin 11 Primary parameter pass and secondary parameter fail low Bin 12 Primary parameter pass and secondary parameter fail high Bin 13 Primary parameter fail and secondary parameter pass Bin 14 Primary parameter fail and secondary parameter fail Bin 15 No contact Note If no limit is entered for primary parameter but one is for the secondary parameter bin assignment will be to Bin 1 for a pass Bin 11 for a fail low or Bin 12 for a fail high Bin assignment during the test sequencing mode of operation is entirely different Bin limits for the primary parameter can be entered in terms of absolute value or as a percent tolerance about a defined nominal Two of the most common methods sorting is nested limits and sequential limits Nested limits are a natural choice for sorting by tolerance around a single nominal value with the lower number bins narrower than the higher numbered ones Nested limits for three bins is illustrated below note that limits do not have to be symmetrical as shown for bin 3 43 7600 Plus LCR Meter 151053 A4 Measured Value Axis Nominal Value 100 00 kQ Tolerance Percent Bin Nominal Yo BELOW Yo ABOVE 1 100 00 k 1 00 1 00 2 100 00 k 5 00 5 00 3 10
95. s as follows Label Primary result Units Label Secondary result Units Bin lt CR gt lt LF gt Sample file format as follows Copyright IET Labs Inc 2008 not printed ENDHEADER not printed 2000000 000000 frequency 5 000000 primary parameter 2 000000 secondary parameter 0 000000 ac signal type 0 100000 ac signal value 0 000000 bias 0 000000 range 1 000000 rangelocked 68 000000 range relay not printed 205 000000 srelay 2 69 000000 relay 3 66 000000 va not printed 2 000000 measurment speed 0 000000 delay time 1 000000 to average 0 000000 contact check 35 7600 Plus LCR Meter 0 000000 display type 0 00000000009989577000 nominal value 0 000000 sresult format 1 000000 trigger 1 000000 handler 3 000000 baud 0 000000 parity 1 000000 data bits 0 000000 stop bits 1 000000 518232 mode 1 000000 rs232 state 4 000000 IEEE address 1 000000 IEEE mode 0 000000 IEEE state 0 000000 sprint results 0 000000 result to USB 0 00000000000000000000 low limit bin 0 0 00000000000000000000 high limit bin 0 0 00000000000000000000 nominal value bin 0 0 000000 limit format bin 0 0 00000000000000000000 slow limit bin 1 0 00000000000000000000 high limit bin 1 0 00000000000000000000 nominal value bin 1 0 000000 limit format bin 1 0 00000000000000000000 slow limit bin 2 0 00000000000000000000 high limit bin 2 0 00000000000000000000 nominal value bin 2 0 000000
96. s still being delivered regardless of the TEST ON OFF control signal When the instrument is remotely controlled be extremely careful The High Voltage Output is being turned On Off with an extemal signal 7600 Plus LCR Meter 151053 A4 CAUTION Before operating the instrument inspect the power inlet module on the rear of the 7600 Plus to ensure that the properly rated fuse is in place otherwise damage to unit is possible When the 7600 Plus is installed in a rack using the IET Labs 7000 00 Rack Mount Kit verify the unit is secured using the cabinet mounting rails and not solely by the front panel angle brackets In bench or rack mount applications the instrument should be positioned with consideration for ample airflow Verify an open space of at least 3 inches 75mm behind the rear panel The surrounding environment should be free from excessive dust to prevent contamination of electronic circuits The 7600 Plus is shipped with a standard U S power cord IET Labs PN 4200 0300 with Belden SPH 386 socket or equivalent and 3 wire plug conforming to IEC 320 or with an approved international cord set Make sure the instrument is only used with these cables or other approved international cord set that ensures the instrument is provided with connection to protective earth ground 7600 Plus LCR Meter 151053 A4 1 6 3 Safety Symbols The product is marked with the following safety symbols A Product will be marked with this
97. shorting wire can be determined by zeroing the instrument using the standard 4 terminal Kelvin clips and then measuring the resistance of the shorting wire 2 14 8 Low V Chip Component Test Fixture 7000 07 The 7000 07 Test Fixture along with the BNC to BNC cable provided is a method of convenient reliable guarded 4 terminal connection of chip or surface mount sensors and components hi p pi A CAUTION SHOCK HAZARD HIGH VOW TAGE MAY APPEAR ON TERMINAIS sy e Figure 61 Low V Chip Component Test Fixture Maximum Frequency 2 MHz Typical Residual Parameters after performing open short at DUT terminals C 0 15 1 0 002 f pF L lt 10 1 0 002 f nH R lt 1 1 f2 mQ where f measurement frequency in MHz Connection to 7600 Plus using 7000 01 or 7000 02 BNC Cable Sets Connect to 7600 Plus Cable Marking Color Connect to Test Fixture PH potential high PH Red white PH IH current high IH Red IH PL potential low PL Black white PL IL current low IL Black IL 86 7600 Plus LCR Meter 151053 A4 Open Short Zeroing Instrument zeroing should be performed once the test fixture is connected Refer to the instrument zeroing instructions for further information For an OPEN the DUT should be removed but the fixture spacing should be the same as the device This can be done by tightening the screw that holds the contact as shown below For a SHORT the fixture contacts should be shorted together with a sho
98. ssory an additional accuracy for parameters listed must be added to the standard instrument accuracy as defined by AutoAcc C 1 5 pF R 10 mQ L 100 nH Q for R gt 100 Q 9 Freq R 10 12 ppm for R lt 100 Q R Freq 10 6 ppm Measurement accuracy is very sensitive to connection geometry The same connection geometry must be used for open short compensation as for connection to the device under test Connection to 7600 Plus Connection to the 7600 Plus is made through four shielded cables with BNC connectors that mate directly with the measurement terminals of the 7600 Plus The cables are color coded to facilitate proper connections as detailed below Connect to 7600 Plus Cable Marking Color Connection to DUT PH potential high PH Red white Positive terminal of DUT TH current high TH Red Positive terminal of DUT PL potential low PL Black white Negative terminal of DUT IL current low IL Black Negative terminal of DUT NOTE H and L denote polarity of AC test signal at 7600 Plus measurement terminals as well as the and polarity of DC bias voltage when applied Open Short Zeroing When these Kelvin Test Leads are used an open short circuit zeroing procedure should be done page 10 to correct for residual resistance and inductance The following diagram shows how to connect the clips for the short circuit Zero 82 7600 Plus LCR Meter 151053 A4 mu ai N
99. st the leads or fixture should be open with no component connected During the Short Test leads should be connected or fixture shorted using a clean copper wire as short as possible When zeroing Contact Check should be OFF to Average to 1 and Median OFF 2 4 Measurement Procedure Whenever the 7600 Plus is powered up it is ready immediately to begin measuring at default test conditions Initially these conditions will be set to factory default but can be changed by the user and stored to overwrite factory default To initiate a test once a device is connected press START the LCD display shows the measured results and test conditions similar to the illustration of Figure 6 NOTE For optimum measurements warm up for 30 minutes 10 7600 Plus LCR Meter Cs 17 52510 pF DF 0 0000500 Freq 1 0000kHz AC Signal Range Auto Average Delay 0 ms Bias Figure 6 Measured Results Display 2 4 1 Default Measurement Conditions 151053 A4 A set of default measurement conditions are initially established at the factory and stored in instrument memory Default conditions are those that determine the instruments status on power up thus the instrument is always set to a known state before any testing begins These conditions can be changed by the user for tailoring to a specific application Refer to section 2 9 4 on page 55 2 5 Factory default measurement conditions Under Setup Menu Primary Parameter Auto Secondary Parameter
100. tor are shown in Figure 9 Rs Rs Cp Rp or Lp Rp or Cs Ls Figure 9 Series and Parallel Circuits for both Capacitive and Inductive Impedances Impedance is the parameter used to characterize electronic sensors components materials and circuits Impedance Z is defined as the opposition a device or circuit offers to the flow of ac current at a particular frequency and generally represented as a complex quantity consisting of a real part resistance R and imaginary part reactance JX Impedance can be expressed using the rectangular coordinate form R jX or polar form as magnitude and phase angle Z 40 Figure 10 shows the mathematical relationship between R X Z and for both inductive and capacitive devices In some cases it becomes mathematically practical to represent impedance using the reciprocal where 1 Z Y G jB where Y represents admittance G conductance and B susceptance This mathematical relationship is shown in Figure 11 for inductive and capacitive devices 15 7600 Plus LCR Meter 151053 A4 R j Ls Impedance jX Capacitance Inductance Figure 10 Phase Diagrams of Impedance Capacitance Inductance B G G j Lp jB Admittance Figure 11 Phase Diagrams of Admittance Quality factor Q is used as a measure of a reactance s purity how close it is to being a pure reactance i e no resistance and defined as the ratio of the energy stored in a d
101. uency PPARameter 151053 A4 The parameter to sweep F frequency V voltage I current The beginning value floating point number The ending value floating point number 10 25 50 100 200 T table P plot ON OFF Is filename valid to save to battery backed up RAM Example CONF BINN BIN1 ABS 100 300 The step to increment during the sweep The result display for the sweep Set the sweep function to ON or OFF Save setup as duplicate filename in battery backed up RAM Save setup as new filename in battery backed up RAM Recall setup filename from battery backed up RAM Is filename valid to save to flash drive XXXXXXXX Save setup as duplicate filename on flash drive XXXXXXXX Save setup as new filename on flash drive xxxxxxxx Recall setup filename from flash drive XXXXXXXX Is results filename valid XXXXXXXX Set the sequence function to ON or OFF ON OFF Enable or Disable a test test 1 6 and ENAble DISable Set the frequency from 10 to 2000000 HZ test and FH HH Set the primary parameter test and A auto RS RP LS LP CS CP DF QZ Y P phase angle ESR GP XS BP 71 7600 Plus LCR Meter SPARameter ACTYpe ACValue BIAS RANGe TDELay STOP LOAd correction NOM inals MEAsure ON OFF SYSTem TIME DATE LOCK out state ELAPsed DCALibration BLCD 151053 A4 Set the secondary parameter test and N none RS RP LS LP CS CP DFQZ Y P phase angle ESR GP XS BP Set the AC test s
102. us To recall a set of test conditions one needs to arrow down or up to the desired set DEFAULT is always one of the set of test conditions that can be recalled as discussed in the previous paragraph Selecting del will delete a set of test conditions and requires a Yes or No response When there are more setups than can fit on the display the page down key is active If there is less than a whole page below the display wraps around to the previous display Continuing to page down will eventually return to the first display of setups 2 9 6 Setup Accuracy Allows user to access the measurement calculation Calculated accuracy is displayed for the instruments currently selected test conditions as shown in the example below and in accordance with the formulas for fast medium or slow accuracy Factors affecting this calculation include frequency ac test signal level measurement accuracy and to average all test conditions under operator control on the Setup Menu The selection of Median on the Analysis Menu also has an affect on the accuracy calculation The Accuracy Average and Median can be changed on this screen as instructed for the purpose of evaluating their effect on the instrument accuracy calculation and the changes implemented if the operator so chooses The frequency AC signal or parameter selection 56 7600 Plus LCR Meter 151053 A4 can only be changed on the Setup menu In summary this display shows instrument accuracy fo
103. w 100mV the instrument can exhibit excessive noise 2 6 7 Range Hold Allows selection of Range Hold Off or On To eliminate operator errors in range setting and ensure specified instrument accuracy the 7600 Plus Range Hold should generally be left Off There may be exceptions to this when repetitive measurements are to be made over a concentrated range of values and there is a desire to reduce test time by eliminating range switching e Off When selected the instrument automatically selects the optimum range for the test voltage and test frequency selected and the impedance being measured e On When selected the range is held based on the one currently selected 1 through 59 in voltage mode or 33 through 159 in current mode The one currently selected is best determined by measuring the device with Range Hold to Off Measured results outside the bounds of a selected range will be indicated by an OVER RANGE or UNDER RANGE display message NOTE The 7600 Plus unit provides an extensive array of range switching based on the user test conditions selected and impedance being measured One of the most important uses of the range holding capability is to avoid range changes when the component is removed from a fixture when repetitive internal triggering is selected With no component connected the instrument can go into a range search and time is lost when the next component is connected Another use of range hold occurs when measuring co
104. wn in Figure 47 below When zeroing Contact Check should be OFF to Average to 1 and Median OFF When the instrument measurement accuracy is selected for SLOW the unit will perform its Open Short in this mode When the instrument accuracy is selected for MEDIUM or FAST the unit will perform its Open Short in the Medium mode The Open Short performed in the Slow mode is necessary only for measurements with extreme accuracy 59 7600 Plus LCR Meter 151053 A4 requirements at very high or low impedance Open Short takes about 5 minutes in the Medium mode versus about 15 minutes in the Slow mode When Quick Open amp Short is selected the zeroing process is performed as prompted on the display in much less time and only at the frequency currently selected on the instrument It is important to note that the quick open and short data is no longer valid if frequency is changed if sweep or sequence is selected or instrument powered down Connect an Open or a Short to the instrument Press the function key for the connection desired HIT MENU TO RETURN TO MAIN MENU Figure 47 Open Short 2 9 8 Lock Out LOCKOUT WITH SETUP RECALL SELECT THE LOCK OUT TYPE HIT lt CNCL gt TO EXIT LOCKOUT ONLY Figure 48 Lockout Allows user to turn keypad lock feature on or off There are two choices that can be selected lockout only and lockout with setup recall In both modes only the START STOP and MENU on the instrument front panel
105. ypical four terminal connection to the device under test H and L on the 7600 Plus denote polarity of AC test signal at the measurement terminals as well as and polarity of DC bias voltage when applied to the DUT 7600 Plus LCR Meter 151053 A4 WARNING When DC bias is applied the PH connection carries a positive DC voltage with respect to ground 2 3 Zeroing Before making measurements the 7600 Plus should be zeroed to correct for test lead and or fixture errors During the zeroing process corrections are calculated and stored in instrument memory and applied to ongoing measurements Measurement accuracy is specified at the end of the IET Labs one meter cable 7000 01 Perform the Open and Short circuit zeroing with the cables and fixtures to be used during testing In order to maintain instrument accuracy with other cable lengths the instrument should be re calibrated using the IET Labs 7000 09 Calibration Kit and the alternate cable Generally the unit should be zeroed at least once per day and each time test leads or fixture is changed It is not necessary to re zero if the test frequency is changed The zeroing routine is accessed through the Utilities Menu as follows 1 Press MENU key 2 Press LEFT RIGHT ARROW to select Utilities menu 3 Press UP DOWN ARROW key for Open Short 4 Press ENTER Follow the instructions shown on the LCD display for open and short circuit zeroing of test leads and or fixture During the Open Te

IET 7600 Plus Precision LCR Meter Manual

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