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3550 Manual

1. Range Impedance 42Hz 99 9Hz 100Hz 1kHz 1 01kHz 10 0kHz 10 1kHz 30 0kHz 30 1kHz 100kHz 101kHz 1 00MHz 1 01MHz 5 00MHz 10 00mMQ 5 4B8 500 5 4B 500 5 48 500 5 4B 500 10 4B 500 100mS2 199 99m9 l o o o o o 5 2B 100 5 2B 100 5 2B 100 5 2B 250 10 4B 500 jo 0 18002 gt 2 0 4B 200 1 0 4B 200 1 5 0 4B 200 1 5 0 4B 200 2 0 4B 200 3 0 4B 200 1 99999 2 0 3B 20 1 0 28 20 1 5 0 28 20 1 5 0 28 60 2 0 28 150 3 0 28 250 100 1 8000 1 0 4B 200 0 8 0 048 10 0 8 0 04B 10 0 8 0 04B 10 1 5 0 04B 50 1 5 0 048 50 5 0 4B 200 19 9999 1 0 28 20 0 8 0 03B 10 0 8 0 038 10 0 8 0 038 10 1 5 0 03B 50 1 5 0 03B 50 5 0 38 200 1009 49 002 0 15 0 02B 10 0 1 0 02B 10 0 15 0 02B 10 0 15 0 02B 10 0 4 0 05B 40 0 6 0 05B 50
2. Use Figure 4 4 as a reference when performing short circuit and open circuit zero corrections 4 27 Model 3550 LCR Meter Instruction Manual Operating Instructions Making Accurate Measurements cont d Equivalent Circuits The DUT can be described in terms of Impedance Z or Admittance Y The relationships of the various characteristics are as follows Z R jx 4 Z Impedance Y G jB 7 R Equivalent Resistance R G X Reactance jX DEY Re Y Admittance 4 G Conductance Q 75 B Susceptance jB D Loss Coefficient X oL 27fL Q Quality 1 4 8 Phase Angle AS f Measurement Frequency Hz w Measurement Frequency rad s 0 tant tan The measurable quantities of the 3550 are L C R Z Y D Q G Rp Rs X B and 0 The measured value of these parameters will change in value as the test frequency is increased or decreased These measured parameters are said to be dependent upon test frequency Two examples are capacitive reactance which is inversely proportional to frequency and inductive reactance which is inversely proportional to frequency Because of the direct relationship to test frequency related quantities such as Dissipation Factor and Quality Factor is also frequency dependent n measurement applications the measured R and G values will change with frequency True R and G are not theoretically dependent to fr
3. 4 4 Model 3550 LCR Meter Instruction Manual Operating Instructions Measurement Tips cont d Test Lead Requirements Four wire Kelvin type cables or fixtures must be used with the 3550 in order to obtain accurate impedance measurements The Kelvin measurement technique allows significant accuracy advantage over the two wire method This is because it virtually eliminates lead resistance and inductance and reduces stray capacitance between the source and sense leads Two of the four conductors are designated as source leads These source leads provide the precision test current that will be referenced in making the resistance measurement Since current is the same throughout a series circuit the lead resistance of the test leads will not have any effect on the level of reference current The other two conductors are designated as voltage sense leads These leads originate from a high impedance volt measurement circuit When these leads are terminated at the points of contact an exact resistance reading is calculated by the 3550 s microprocessor The series lead resistance of the voltage sense leads is negligible due to the high impedance of the voltage measurement circuitry within the 3550 Figure 4 1a Four Wire Kelvin Measurement VOLTAGE SENSE CONTACT Hsense LSENSE POINTS REFERENCE CURRENT SOURCE Hrorce LFoRcE DUT DUT CORRECT INCORRECT 4 5 Model 3550 LCR Meter Instruction Manual Operating Ins
4. xxxssssssssssssssssssssiiiiizinininininno 5 1 Interfacing tO Me 3350 pcs crrsauaceasse aa a 5 2 Control 1 0 CONNECEOL erceicadsdcvavedietundususdwnitedadadonientaetninads diverts tekaddacunetnmtad 5 2 LADUT dae ee ee ee ere 5 2 Figure 5 1 INDUC SCHEMIAUC risas 5 2 QU DULS PR e UG E EEE E 5 3 Figure 5 2 QUEpuEsSchematio mina 5 3 Timing DIG OFAMIS A Pf Fo oo EC O Ia 5 4 Figure 5 3a Test BUSYTOPEratOhNi zszsoz arianna satana 5 4 Figure 5 3b Measure End Operation rr 5 4 Figure 5 3c GO NO GO Operation rio 5 4 Table 5 1 Connector Pin Designations i 5 5 Table 5 2 Control I O Function SUMMAry i 5 6 Sample Diagram of External Connections to Sequencer 5 7 R27 92S OMPI no i n ic 5 8 Interface Cable castor bicis asa 5 8 Majo Pia e aa PP RP e E E O II ro 5 9 Table 5 3a Command SUMMAlVizz cui 5 12 Table 5 3b Command Summary CONC i 5 13 Table 5 3c Command Summary cont d cnn 5 14 Table 5 4 Comparator INSEUCHONS ss cri 5 15 Data Output Format for Measurement Settings i 5 16 Table 5 5a Data Output Code FUNCTIONS rr 5 17 Table 5 5b Data Output Code Functions CONt d i 5 18 Monitor OE aan 5 19 Table 5 6c Monitor Output Code FUNCtions rr 5 22 Table 5 6b Monitor Output Code Functions CONt d rr 5 23 RS 232C Hardware and Computer Settings
5. i 5 24 Sample Programs for RS 232C mania nr 5 25 The GPIB Interface Optional sissi 5 29 General Description Of GPIB ssssssesssssrsrrrrnrsrrnrerenrerrrrnrnrerrnrerrrrnrerne 5 29 Primary Specifications of GPIB nr 5 29 Table 5 7 GPIB FUNCION S rieri EE 5 29 Installation of the GPIB Board s seessssssssunsnsunnnsnnuunnnunnnennnosnnnnnnnnennnns 5 30 UA Real WCW E e e o a NETON 5 30 FIOUFS 5 4D SIGS VW ra 5 31 FOUS S4C LOD VICW esigenti 5 31 Front Panel Status LEDS mise iros 5 32 Local Key ONIE ia E E A A E ET 5 32 GPIB SWIG sia a 5 32 Delimiter Output Formats rr 5 32 Output Status Bits for Service REQUESTS etti 5 33 Figure 5 5 GPIB Status Bils erisin erian ione re 5 33 Additional Notes for Using the GPIB Interface no 5 33 PFOGramMmino Examples loci 5 34 f Model 3550 Programmable LCR Meter Instruction Manual TEGAM Table of Contents VI SERVICE INFORMATION iii 6 1 NATA APP ORO Go PO VIA 6 2 warranty CAAO eina sb erica 5 2 Statement of Calibration ivssiisiriinac rad 6 2 Contact Information rr 6 2 GDN We CS hector tnt ee pt os eee ac ee i 6 3 TROUDICSNOOUNIG siii 6 4 Preparation for Repair or calibration SErvice rr 6 5 Expedite Repair and calibration FOrm_ rr 6 6 Performance Verification PFrOCEdUre rr 6 7 Model 3550 Calibration Adjustment ProcedUre rr 6 12 VII APPENDIX Lala A 1 Setting the Co
6. 4002 100k 1 8 AB 100 40 ik 100k 1 ZZ A B 10k 85 iko 100k i gt e AB 100 40 aoo Jim i z AB ik 204 aoo IM Ji AB oo 50 40029 iMm Ji __ ARB oo 115 40029 IM Ji O o O a B i00 40 ako IM AZ A B 10k 115 iko Dim Ji 8 AB oo 40 OIF ik Ji __ A4B ik 22 Otro fik i 3 A B 1w00 20 pF 1k fa AB 10K 22 tF fik A A B 100 20 A A B 100 21 ide dik E CO _ 6 10 TEGAM Model 3550 LCR Meter Instruction Manual Service Information Model 3550 Verification Procedure cont d TEGAM 3550 AND AGILENT 4284A MEASUREMENTS O AB oe STANDARD VALUE TRE v METER dandA 3550 ERROR Gs Hz V CTS 0tpF OK 1 12 A B 10k 33 OF 3 3535 10k 1 o AB 100 28 LIU AOK 100 12 AB 100 26 LIU OK fa Je S AB 100 20 AWF Ok 1 dz _ o A B Ik 96 AWF OK OT A B 100 86 01 2 000K AZ A B 100_ 83 0otpF 3 _J100k 1 Je A B 100 78 Ap PAOK AZ AB FIk 203 LIU 100k ji Je __ AB 100 187 AWF iook A AB 10k 425 AWF 00K A AB 100 341 Lote OM a z AB 1k 203 OF AM 1 Je AB 100 187 IF AM A AB Ok 525 IF AM 10 AB 100 531 aM ik fji 12 AB 10k 180 aM Ka Je A B 100 20 stoma tk Ji 2 A B Ik 235 aom oik 1 Ja A B 100 41 400M9 KZ A B 100 1015 E A y A B 100 NOTE Phase
7. e e ee P1_BIN7_CPO_ PRO en asta P1_BIN8_CPO_ estra Le papas P1_BIN9_CPO_ e SS ee Places with no setting will be filled with ASCII Code 2Dhx12 D Q and 8 will have a _ ASCII Code 5Fh for their Unit In Output Format Sample the _ denotes a space ASCII Code 20h 5 20 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Monitor Output Format Output in Relation to Limit Monitor Command LIM Setting Mode Output Format Sample P1_BIN1_CP1_ 10 000E 03H_005 00 006 00 _ 1 0000E00R_010 00 010 00 P1_BIN2_CP1_ 10 000E 03H_010 00 010 00 _ 1 0000E00R_020 00 020 00 P1_BIN3_CP1_ 10 000E 03H_020 00 020 00 _ 1 0000E00R_030 00 030 00 P1_BIN4_CP1_ 0 0000E 00H_ pasas _ 0 0000E00R_ P1_BIN5_CP1_ 0 0000E 00H_ pas _ 0 0000E00R_ P1_BING6_CP1_ 0 0000E 00H_ lapo _ 0 0000E00R__ P1_BIN7_CP1_ 0 0000E 00H_ ese _ 0 0000E00R__ P1_BIN8_CP1_ 0 0000E 00H_ _ 0 0000E00R_ P1_BIN9_CP1_ 0 0000E 00H_ _ 0 0000E00R_ Panel Number Delimiter Places with no setting will be filled with ASCII Code 2Dhx7 D Q and will have a _ ASCII Code 5Fh for their Unit In Output Format Sample the _ denotes a space ASCII Code 20h 5 21 3550 LCR Meter Instruction Manual Programming and Interfacing R
8. 1 to lock the front panel or to O to unlock the front panel keys Press the ENTER key to finalize the setting Model 3550 LCR Meter Instruction Manual Operating Instructions Front Panel Description cont d SHIFT 5 Comparator Buzzer Function Press the SHIFT 5 keys to enter the Buzzer Settings Mode The active setting 0 2 will blink in DISPLAY B Buzzer OFF Dei NO GO Buzzer ON Press either 0 1 or 2 The new entry will appear in DISPLAY B Press ENTER to finalize the setting and to return to the measurement mode SHIFT 6 Trigger Delay Time The trigger delay time is programmable from 0 10 000 milliseconds 10s It is used to add a time delay immediately after the detection of a trigger signal from either the MAN EXT key external control device I O Control Connector RS 232C or GPIB Interfaces In the Trigger Delay Time Settings Mode the active setting for the trigger delay time will appear flashing on DISPLAY B The default setting for the Trigger Delay Time is 00000 ms The active flashing number can be changed by highlighting the active digits by pressing the CURSOR or CURSOR lt keys and entering a new value by pressing the 0 9 keys When all the necessary digits have been changed press the ENTER Key to finalize the settings and return to Measurement mode 7 Model 3550 LCR Meter Instruction Manual Operating Instructions Front Panel Descrip
9. 20 0 2 0 06a 20 0 8 0 06a 80 2 0 06a 140 6 0 10 600 ino 0 3 0 10 20 1 6 0 10 100 0 2 0 060 20 1 6 0 1a 360 4 0 1a 360 6 0 10 360 we E 3 0 2a 40 3 0 2a 40 _ 3 0 2a 40 4 0 2a 140 4 0 2a 140 3 0 2a 40 4 0 2a 400 4 0 2a 500 o Jos ngomo 4 0 3a 40 4 0 2a 80 100MQ 10 0 20 800 10 0 2a 800 10 0 2a 800 Upper Specification Accuracy of Z Nominal Counts Lower Specification Accuracy of 8 Nominal Counts fe x fa The count coefficient should be calculated as follows The Set Measurement Voltage 2x _ 10 000 Q 40 000 0 000 B Zx the number of counts for Z A 8 Table A 5 Basic Accuracy Table 21V to 45V Measure Frequency Range Impedance 42Hz 99 9Hz 100Hz 1kHz 1 01kHz 10 0kHz 10 1kKHz 30 0kHz 30 1kKHz 100kHz 101kHz 1 00MHz 1 01MHz 5 00MHz 10 00mMQ 100MQ 0 1800Q 3 0 68 300 cd MN 1 8002 1 5 0 6B 300 1 2 0 06B 15 sa 19 999Q i 1 5 0 3B 30 1 2 0 045B 15 18 009 SPAS 199 99Q 0 1800kQ 1 9999kQ 1 1k 8 e e js i 1 800kQ 19 999K0 15 0 0075a 15 0 15 0 00750 15 0 15 0 045a 15 0 15 0 0450 15 0 6 0 0450 60 1 5 0 0450 105 4 5 0 0750 450 10kQ 100kQ 0 1800MQ 2 25 0 15a 30 2 25 0 15a 30 1 9999MQ 2 25 0 15a 30 2 25 0 15a 30 2 25 0 15a 30 1 800MQ 3 0 225a 30 3 0 225a 30
10. 3 0 05B 50 199 999 0 15 0 018 10 0 1 0 018 10 0 1 0 018 10 0 1 0 018 10 0 4 0 038 40 0 6 0 038 40 3 0 03B 150 iko P 1800kQ 0 15 0 010 10 0 1 0 010 10 0 15 0 05a 10 0 15 0 05a 10 0 4 0 05a 40 0 6 0 058 50 3 0 058 350 1 9999kQ 0 1 0 005a 10 0 1 0 005a 10 0 1 0 03a 10 0 1 0 03a 10 0 4 0 03a 40 0 6 0 038 40 3 0 058 350 bok 1 800kGw 0 15 0 010 10 0 1 0 010 10 0 15 0 05a 10 0 15 0 05a 10 0 4 0 05a 40 1 0 05a 100 3 0 05a 400 19 999kQ 0 1 0 005a 10 0 1 0 005a 10 0 1 0 03a 10 0 1 0 03a 10 0 4 0 03a 40 14 0 03a 70 3 0 05a 300 100kQ 18 00kQ 0 15 0 01a 10 0 1 0 01a 10 0 15 0 05a 10 0 8 0 05a 50 1 0 050 50 3 0 05a 300 20 0 5a 700 199 99kQ 0 1 0 005a 10 0 1 0 005a 10 0 1 0 03a 10 0 8 0 05a 180 2 0 05a 180 3 0 05a 180 20 0 5a 500 mo 0 1800MQ 1 5 0 1a 20 1 5 0 1a 20 1 5 0 1a 20 2 0 1a 70 2 0 10 70 20 0 10 700 1 9999MQ 1 5 0 1a 20 1 5 0 1a 20 1 5 0 10 20 2 0 1a 200 2 0 10 250 20 0 1a 200 iomo 1 800MQ 2 0 15a 20 2 0 15a 20 2 0 15a 20 2 0 15a 70 20 0 150 500 19 999MQ 2 0 10 40 2 0 1a 40 2 0 1a 40 2 0 1a 200 20 0 1a 700 LOOMO LS OOM amp 5 0 15a 500 5 0 15a 500 5 0 150 500 5 0 150 500 50 0 150 500 199 99M2 5 0 1a 400 5 0 10
11. 9 to select the desired bin 9 Input the Threshold Value for DISPLAY A After entering the bin number use the cursor key gt to highlight DISPLAY A Enter the 5 digit threshold value for DISPLAY A using keys 0 9 The setting range is from 000 00 199 99 10 Input the Threshold Value for DISPLAY B Enter the 5 digit threshold value for DISPLAY B using keys 0 9 The setting range is 000 00 199 99 11 Finalizing the Setting To finalize an upper limit press HIGH or press LOW to finalize a low limit setting NOTE Whether a high or low limit comparator setting is defined is determined in step 7 To input settings for other bins return to Step 1 and repeat the process 12 Invalidating the DISPLAY A or DISPLAY B Percent Comparator settings To invalidate the settings for threshold values simply enter the Threshold Percent Comparator Set Mode and move the cursor to any segment in DISPLAY A or DISPLAY B Then press IGNORE to invalidate the comparator settings for that DISPLAY NOTES 3 8 Y eye 9 4 The comparator can only be set using panels 1 9 0 cannot be used This procedure is only for the percent comparator setting Note that the procedure for the absolute value comparator is different Make sure the comparator mode is set for Percent Mode otherwise the procedure will not work correctly After setting the limit values for the comparator the measurement parameters for DISPLAY A and DISPLAY B
12. Diode 38 O lt Photo nw Ene colle IA 4 28133 5 2 3550 LCR Meter Instructi on Manual Programming and Interfacing Control I O Connect Outputs or cont d The 3550 has 5 data output lines available for external monitoring Each of the data outputs are optically isolated and current limited through the use of a constant current diode as shown in the illustration below Photo Coupler Figure 5 2 5V il 33002 Output Schematic Fixed Current Diode O lt 1 26 VCC EXT tf 10mA e 1320 3844 i yo lt 2 27 EMITTER COMMON EXT 5 3 3550 LCR Meter Instruction Manual Programming and Interfacing Control 1 0 Connector cont d Timing Diagrams Figure 5 3a Test Busy Operation MEASURE START MEASURE END TEST Figure 5 3b Measure End Operation GO NO GO DATA OUT MEASURE END ims Figure 5 3c GO NO GO Operation MEASURE END GO NO GO 5 4 3550 LCR Meter Instruction Manual Programming and Interfacing Control 1 0 Connector cont d Table 5 1 Connector Pin Designations ES Signal Name Fi Signal Name pese EN EMITTER COMMON jar ener COMMON maro ooo PANEL 2 A PANEL 2 K PANEL 2 A PANEL 2 K PANEL DO EN eB E E 1 7 E a EII ae pista o EI ES DISPLAY so DISPLAY A GO 40 DISPLAY B GO TOTAL GO TOTAL NG TAREAS A 17 BIN 2 BIN 2 gg gt TEST BUSY ca MEA
13. _ Parameter Setting Parameter Setting 31 DISPLAYA_ Capacitance 9 Communications RS232 _ 2 DISPLAYB_ Dissipation Factor 10 Trigger INT 13 DISPLAYC Frequency 11 Pae TO 4 Comparator Data Cleared 12 Circuit Mode AUTO 5 Comparator OFF 13 Range AUTO 6 Zero Correction Data Cleared 14 LOCK Test Frequency ikHz 15 Test Voltage 1 00 V hi Measurement Mode Open Terminal o Voltage not storable in a setup location At any time during use you may recall these default settings by pressing the MAN EXT key while powering the unit NOTE When the unit is reset to factory defaults user defined comparator settings and zero correction factors will be lost Model 3550 LCR Meter Instruction Manual Quick Start Instructions Table 3 2a Control Command Summary o range pene numer a S o carey ost open cometen NO OOS When and CV CC LED are flashing Change the fixed voltage setting DISPLAY C s DOWN 15 Change to fixed current mode 1 CV CC slo Change the fixed current setting when 1 ane ar a flashing 25 move cursor omera m seeno moas a z oonan gt OUUU TSc valage for measurement or fixed voltage SHIFT gt 1 gt Voltage Value V gt ENTER EJ Set current for fixed current mode SHIFT gt 2 Current Value mA gt ENTER 31 Set number of measurements SHIFT gt 3 gt Number Setting gt ENTER Aejdsig O O 3 3
14. 7 Absolute or Percentage Comparator Function Comparator Limit Set Panel Comparator ON OFF Switch 4 35 Model 3550 LCR Meter Instruction Manual Operating Instructions The Comparator cont d Absolute Value Settings NOTE A condensed version of this procedure can be found in the Quick Start Section 1 Make sure that panel 1 9 is selected Do this by pressing the 0 9 key until the desired panel appears on the Panel LED Press SHIFT 7 to access the Comparator Functions Mode Either a flashing O or a 1 will appear on DISPLAY B The meaning of the numbers is as follows 0 Absolute Value Comparator Function 1 Percent Comparator Function To change the flashing digit press 0 ENTER to call the absolute comparator mode and return to the measurement mode 2 In the measurement mode press the LOW key in the Comparator Limit Set Panel Make sure that a panel number from 1 9 is selected otherwise the comparator HIGH and LOW keys will be disabled The LOW LED will light The BIN segment LED will flash the numeral 1 Press a numeric key 1 9 to define the bin number 3 Press the CURSOR P once This will cause the 5 digit if DISPLAY A to flash Type in the comparator low limit value using the 0 9 keys and the CURSOR or CURSOR lt keys to navigate between the 1 and 5 digits After digits 1 through digit 5 has been set press the CURSOR P key until the decimal point beg
15. CV CC button 4 Check and confirm that both the CV CC and V button are illuminated The 3550 is now operating in Constant Voltage Mode Calculating the Maximum Allowable Constant Voltage Setting The figure bellow is an equivalent circuit of the Output Oscillator of the 3550 When connected to a DUT of a known impedance Z and known phase angle theta the constant voltage maximum limit for a defined impedance and theta may be determined by using formula 1 NOTE The absolute maximum allowable constant voltage setting regardless of DUT impedance is limited by instrument capability This maximum amount is 3 58V 500 DUT cy lt 4080 jZsing___ E 50 Z cos jZ sing Formula 1 Where CV Constant Voltage Setting Limit V Maximum Oscillator Voltage Setting Sample Calculation For a test frequency of 1 kHz Z 1009 and theta 0 45 the maximum constant voltage setting is calculated as follows CV lt Z cos jZ sin x5 50 Z cos jZ sing CV lt n ee 50 100c0s45 j100sin45 100c0s45 j100sin45 CV lt 3 458 j0 903 CV lt 3 574V A 3 Model 3550 LCR Meter Instruction Manual Appendix Setting the Constant Current Mode To Enable the Constant Current Mode 1 Check and confirm that the CV CC button is not illuminated 2 Push the I button until Display C indicates current 3 Press the CV CC button 4 Check and confirm that both the CV CC and I button are
16. XA e Y ey Table 3 4 Settings Summary DN mode Change to fixed voltage mode 13 ee Set current for fixed current mode 16 or 30 mode Change to fixed current mode 15 Select absolute value comparator 38 Set comparator lower limit value 23 To use absolute Set comparator upper limit value 24 value comparator Turn comparator ON 25 For comparator setting details see absolute value comparator setting instructions Select percent comparator 39 Set comparator lower limit value 23 To use percent Set comparator upper limit value 24 comparator Turn comparator ON 25 For comparator setting details see percent comparator setting instructions Set spot correction frequency 40 42 To use spot A j onon Carry out spot open correction 45 Carry out spot short correction 46 Set upper frequency limit for correction 44 To use frequency Set lower frequency limit for correction 43 limit correction Carry out open correction 9 Carry out short correction 10 3 5 Model 3550 LCR Meter Instruction Manual Quick Start Instructions Setting the Absolute Comparator To set the Absolute Value Comparator following the procedure below 1 Select either the upper or lower comparator limit To input an upper limit press HIGH To input a lower limit press LOW 2 Input the BIN No After the HIGH or LOW key is pressed the BIN LED will begin to flash Use keys
17. and in decimal 31 cannot be set 3550 LCR Meter Instruction Manual Programming and Interfacing The GPIB Interface Output Status Bits for Service Requests After the power is turned ON sending the command S1 allows Service Requests to be used The status bits for the 3550 are positioned as indicated below Figure 5 5 GPIB Status Bits Bit BIt6 Bit5 Bit4 Bit3 Bit2 Biti BitO Command Data Hand Shake o se o eS 0 continue Error Data Ready DIO8 DIO7 DIO6 DIO5 DIO4 DIO3 DIO2 DIO1 Bit6 If a Service Request occurs under program code S1 this will become 1 and the SRQ Line will be True Bit4 When improper program codes or numerical data are received this will become 1 Bit2 While data flow is continuing this will be 1 Bit1 If a GPIB Handshake Error or an unknown command is received this will become 1 BitO When data to be output is ready to go this will become 1 Additional Notes for Using the GPIB Interface 1 Almost all of the switches on the front and rear panel of the 3550 can be controlled remotely through an external controller 2 The 3550 should be designated as the Listener and the necessary measurement parameter program codes should be sent from the controller The program codes for GPIB are the same as the program codes for the RS 232C 3 By setting E1 within the program code measurement using a GET message is possible If E2 is set measurements w
18. and uses these values to calculate impedance Z and phase angle 6 Displaying impedance Z in a complex notation as below allows us to determine the following values IMAGINARY NUMBERS Z V I REAL NUMBERS Z R jX TAN X R Z V Re Z Impedance Q 0 Phase Angle deg R Resistance Q X Reactance Q Z Absolute Value of Impedance Q Depending on the properties of the DUT Admittance Y which is the inverse of Impedance Z may be used to calculate parameter values instead Admittance Y like Impedance Z can be represented in complex notation in order to calculate the following values REAL NUMBERS Y G jB p TAN B G Y V G B Y Admittance S G Conductance S B Susceptance S Y Absolute value of Admittance S IMAGINARY NUMBERS Model 3550 LCR Meter Instruction Manual Instrument Description Formulas and Measurement Accuracy cont d The 3550 calculates the various measurement values using the inter terminal voltage V applied to the DUT device under test terminals the current I that occurs in relation to the voltage the Phase Angle 6 of V and I and the Angular Velocity w of the measurement frequency These factors are used in the formulas below to determine values for the measurements made by the TEGAM 3550 Note The Phase Angle is based on Impedance Z In order to base the Phase Angle on Admittance Y add a sign to the Impedan
19. commands and to return back to the measurement mode TEGAM we Model 3550 LCR Meter Instruction Manual Operating Instructions Rear Panel Description Figure 4 3 Rear Panel Layout Leet tal fra ia Line Voltage Selector Plug Fuse Rating Chart Fuse Input VAC Input GND Terminal Line Voltage Selector Plug The Model 3550 is capable of 100 120 220 240 VAC 50 60 Hz Operation To change the line voltage remove the plug by pulling it from the rear panel Put the plug back in to the socket with the arrow pointing to one of four supply voltage settings Fuse Input Use 3AG Type Fuses 1 4 X 114 6 35X31 75mm Fuse Rating Chart See Rear Panel or Preparation for Use Section for fuse ampere ratings Use fast acting fuses only VAC Input 100 120 220 240 power input An internal line filter is included in this input GND Terminal The GND binding post provides a direct connection to the instrument s chassis and the grounded connector of the VAC input plug 4 22 SAA Cooling Fan Ventilation sj asas e Slot LOMTACL E RS 232C Port Control I O Port Holes Cooling Fan Ventilation Holes To prevent overheating keep these ventilation holes free of obstructions Periodically inspect these holes to assure they are free of obstructions Control I O Port The Control I O Port has optically isolated TTL inputs and outputs used for remote operat
20. impedance test devices or components with short leads however the measurement frequency and impedance range are limited as shown in Table 4 4 Exceeding the recommended measurement ranges may result in erroneous and inaccurate readings Table 4 4 Impedance and Frequency Limitations of Kelvin Klip Leads Measurement Range 42Hz 10kHz 100MQ 1MQ 10 1kHz 100kHz 1Q 100kQ 101kHz 1 00MHz 109 10k0 NOTE Additional test voltage and current restrictions of the 3550 unrelated to test fixtures apply for measurements exceeding 1MHz TEGAM Model 3550 LCR Meter Instruction Manual Operating Instructions Making Accurate Measurements cont d Test Fixture Selection cont d Model 3511 Surface Mount Device SMD Test Fixture _ l The 3511 is a test fixture designed to perform 3 wire S eG R impedance measurements of surface mount devices E po 2 This adapter is suitable for measurement of chip aeemeeemeneeas components with middle to high impedance ranges The measurement frequency and range limitations y e ai are summarized in table 4 5 below i Exceeding the recommended measurement ranges may result in erroneous and inaccurate readings The signal level limitations of the instrument must also be considered when making measurements above 1MHz recam HEAT ICE Table 4 5 Impedance and Frequency Limitations of the SMD Test Fixture Measurement Range 42Hz 100kHz 102 1MQ 101kHz 1 0
21. 0 20 0 5a 700 0018 1 0 05a 50 3 0 05a 300 2 0 05a 180 20 0 5a 500 0 1800MQ 1 5 0 10 20 1 5 0 10 20 2 0 10 70 20 0 1a 700 IMQ po ne AAA A A MET EE OEM Acli 20 0100 1 2399M8 a 540 10 20 1 5 0 10 20 2 0 10 250 20 0 1a 200 eae 2 0 15a 20 20 0 15a 500 2 0 1a 40 2 0 1a 40 20 0 1a 700 _ 5 0 150 500 5 0 15a 500 5 0 15a 500 50 0 150 500 5 0 10 400 5 0 10 400 5 0 1a 1500 50 0 10 1500 500 5 0 10 400 100MQ Upper Specification Accuracy of Z Nominal Counts Lower Specification Accuracy of 6 Nominal Counts Accuracy Limit from X Eee ed The count coefficient should be calculated as follows Measurement Limit Chart Limit for Chart The Set Measurement Voltage a a eee iia ARTO 10 000 ZX x the number of counts for Z A 10 Table A 7 Basic Accuracy Table 1 01V to 5 00V Measure Frequency Range Impedance 42Hz 99 9Hz 100HzZ 1kHz 1 01kHz 10 0kHz 10 1kHz 30 0kHz 30 1kHz 100kHz 101kHz 1 00MHz 1 01MHz 5 00MHz 7 5 6B 750 7 5 3B 150 1 5 0 68 300 1 5 0 3B 30 1 2 0 06B 15 1 2 0 0458 15 UL 1 800kQ 19 999K9 9 1540 0075a 15 0 15 0 0075a 15 0 15 0 045a0 15 0 15 0 045a 15 0 6 0 045a 60 100kQ 0 1800MQ oe 1 9999MQ i 2 25 0 15a 30 2 25 0 15a 30 2 25 0 15a 30 3 0 15a 300 30 0 15a 300
22. 0 4 0 04a 40 0 6 0 20 40 sis 19 999K9 0 4 0 02a 40 0 4 0 02a 40 0 4 0 120 40 1ooka 18 00kK2 0 6 0 04a 40_ 0 4 0 040 40 3 2 0 2a 200 0 4 0 020 40 3 2 0 20 720 1 800MQ 19 999MQ 1 6 0 12a 160 4 0 20 200 8 0 2a 720 4 0 120 280 12 0 20 1200 12 0 20 720 12 0 20 1200 0 4 0 120 40 10MQ Upper Specification Accuracy of Z Nominal Counts Lower Specification Accuracy of 8 Nominal Counts Accuracy Limit from X k a The count coefficient should be calculated as follows Measurement Limit Chart Limit for Chart The Set Measurement Voltage TEE i sita RR 10 000 7X x the number of counts for Z A 7 Table A 4 Basic Accuracy Table 11V to 20V Measure Frequency Range Impedance 42Hz 99 9Hz 100HzZ 1kHz 1 01kHz 10 0kHz 10 1kHz 30 0kHz 30 1kKHz 100kHz 101kHz 1 00MHz 1 01MHz 5 00MHz 3 0 8B 400 3 0 88 400 3 0 4B 80 3 0 4B 120 1 6 0 08B 20 1 6 0 088 20 3 0 088 100 1 6 0 068 20 1 6 0 068 20 3 0 068 100 0 3 0 04B 20 0 3 0 04B 20 0 8 0 1B 80 0 2 0 02B 20 0 2 0 02B 20 0 8 0 068 80 1 2 0 068 80 0 1800kQ 0 3 0 1a 20 A 0 2 0 06a 20 soka 1 800kQ 0 3 0 02a 20 0 2 0 02a 20 0 3 0 10 20 0 3 0 1a 20 0 8 0 1a 80 19 999K92 0 2 0 01a 20 0 2 0 01a 20 0 2 0 06a
23. 06B 60 0 6 0 06B 60 0 1800kQ e 1 9999kQ 0 6 0 18a 60 1 800kQ 0 9 0 06a 60 0 6 0 060 60 0 9 0 30 60 0 9 0 3a 60 2 4 0 30 240 _ 6 0 3a 600 10k2 19 999k0 0 6 0 03a 60 0 6 0 03a 60 0 6 0 18a 60 0 6 0 18a 120 2 4 0 18a 240 6 0 18a 420 0 9 0 30 60 4 8 0 3a4 300 0 6 0 18a 60 4 8 0 3a 1080 12 0 3a 1080 Upper Specification Accuracy of Z Nominal Counts Lower Specification Accuracy of 8 Nominal Counts a he Accuracy Limit from Maximum Voltage The count coefficient should be calculated as follows y X 9 Measurement Limit Chart Limit for Chart a _ 2x B OE 10 000 7 h b i i gt The Set Measurement Voltage 10 000 Zi amp the number of counts for Z A 6 Table A 3 Basic Accuracy Table 05V to 10V Measure Frequency Rangel impedance A Mea e Frequency S 42Hz 99 9Hz 100Hz 1kHz 1 01kHz 10 0kHz 10 1kHz 30 0kHz 30 1kHz 100kHz 101kHz 1 00MHz 1 01MHz 5 00MHz 1 800Q2 3 2 0 16B 40 3 2 0 16B 40 SRI 3 2 0 12B 40 3 2 0 12B 40 1000 pees eae 0 4 0 08B 40 0 6 0 08B 40 1 6 0 2B 160 2 4 0 2B 200 12 0 2B 200_ 0 6 0 048 40 0 4 0 04B 40 0 4 0 04B 40 1 6 0 128 160 2 4 0 12B 160 12 0 12B 600 0 4 0 040 40 0 6 0 20 40 1 6 0 20 160 2 4 0 20 200 12 0 2B 1400 0 4 0 020 40 0 4 0 120 40 1 6 0 12a 160 2 4 0 120 160 12 0 28 1400 1 800kQ
24. 1 9 to designate the number 3 Input a limit value for DISPLAY A After selecting the bin number use the cursor to highlight DISPLAY A Enter the 5 digit upper or lower value using the keys 1 9 When this is complete the decimal point will flash Press DP to move the decimal point to the position of the setting value Use the cursor gt to highlight the unit Here each time UNIT is pressed the unit will change Designate the unit for the Nominal value 4 Input a limit value for DISPLAY B When the setting for DISPLAY A is complete use the cursor gt to highlight DISPLAY B Enter the 5 digits decimal point and unit as done for DISPLAY A If the setting is a negative value use the cursors keys gt or to highlight the 1 digit of DISPLAY B Press to negate the value 5 Finalize the Comparator Settings If defining an upper limit press HIGH to complete the setting If defining a lower limit press LOW to complete the setting To input settings for other bins repeat the steps above 6 invalidating the DISPLAY A or DISPLAY B Comparator settings To invalidate the settings take the cursor gt or to any digit location in DISPLAY A or DISPLAY B Then press IGNORE to invalidate the settings of DISPLAY A or DISPLAY B NOTES The comparator can only be set using panels 1 9 0 is not used The above procedure applies only to the Absolute Value Comparator The procedure for set
25. 1 9 Table 1 7a Absolute Comparator Operation i 1 11 Table 1 7b Percentage Comparator Operation nos 1 11 Table 1 8 Numeric Displays and Annunciators ri 1 11 Formulas and Measurement ACCUrAcy nr 1 13 Table 1 9 Series and Parallel Equivalent Circuit Measurements 1 14 II PREPARATION FOR USE ric 2 1 Unpacking and INSPECHIO z cszirirenicianinzi rire 2 2 Safety Information and PrecautionS ri 2 2 Servicing Safety SUMIMATY ria 2 4 Line Voltage and Fuse Selection ri 2 5 III QUICK START INSTRUCTIONS aims 3 1 POWO Chie UniGe ssaa aci aaa 3 2 Instrument SENGS AR ilaele iaia 3 2 Table 3 1 Factory Default Settings rr 3 2 Table 3 2 Control Command SUMMAaLry iii 3 3 Table 3 3 Shift Function Summary i 3 4 Instrument Setup for Basic MeaSUremeEnts i 3 5 Table 34 Settings SUMMA 3 5 Setting the Absolute COMparatorF ccocccccccccccccnnnnnncncnrrccana nan rrr rr rra 3 6 Setting the Percent Comparator rire 3 7 IV OPERATING INSTRUCTION Sisa 4 1 BOSE ODEPA O hersir ili BP nea iti 4 2 Default ParalMeters sms seriadas ri a a 4 2 PP ECAOUCIONS Eeen E TE A n 4 2 Measurement TIDE srera ae E EE E E E Ea EET 4 2 Making Measurements that are Sensitive to Voltage and Current 4 2 Measuring Earth Grounded Test Pieces rr 4 2 Measurement Circuit MOGES is sisi iii vacua eancina
26. 10 PRINT A 310 NEXT J 320 GOTO 220 330 TESTEND 340 END 3550 LCR Meter Instruction Manual Programming and Interfacing The GPIB Interface Programming Examples GET Trigger 110 CLS 120 ISET IFC 130 FOR I 0 TO 100000 NEXT I 140 ISET REN 150 CMD DELIM 0 160 PRINT 5 ren 170 PRINT 5 s0 el 02 180 FOR J 100 TO 10000 STEP 100 190 K LEN STR J 200 A MID STR J 2 K 1 210 PRINT 5 fre A O 220 WBYTE amp H2F amp H8 230 LINE INPUT 5 A 240 LOCATE 0 10 PRINT A 250 NEXT J 260 GOTO 180 270 TESTEND 280 END 5 35 Model 3550 LCR Meter Instruction Manual Service Information INSTRUMENT DESCRIPTION PREPARATION FOR USE QUICK START INSTRUCTIONS OPERATING INSTRUCTIONS PROGRAMMING amp INTERFACING SERVICE INFORMATION APPENDIX 6 1 Model 3550 LCR Meter Instruction Manual Service Information Warranty TEGAM Inc warrants this product to be free from defects in material and workmanship for a period of one year from the date of shipment During this warranty period if a product proves to be defective TEGAM Inc at its option will either repair the defective product without charge for parts and labor or exchange any product that proves to be defective TEGAM Inc warrants the calibration of this product for a period of 6 months from date of shipment During this period TEGAM Inc will recalibrate any product which does not conform to the published accuracy spe
27. 3 0 225a 30 19 999MQ2 3 0 150 60 3 0 15a 60 3 0 15a 60 3 0 15a 300 30 0 15a 1050 IMQ 10MQ 7 5 0 15a 600 7 5 0 15a 600 7 5 0 15a 600 7 5 0 150 2250 100MQ Upper Specification Accuracy of Z Nominal Counts Lower Specification Accuracy of 8 Nominal Counts eo xX kee The count coefficient should be calculated as follows The Set Measurement Voltage Zx _ 10 000 Q 40 000 0 000 B Zx the number of counts for Z A 9 Table A 6 Basic Accuracy Table 46V to 1 00V Measure Frequency Range Impedance 42Hz 99 9Hz 100Hz 1kHz 1 01kHz 10 0kHz 10 1kHz 30 0kHz 30 1kHz 100kHz 101kHz 1 00MHz 1 01MHz 5 00MHz 10 00m9 5 4B 500 5 4B 500 10 4B 500 1 0 4B 200 2 0 4B 200 1 0 2B 20 2 0 2B 150 0 8 0 04B 10 0 8 0 04B 10 0 8 0 04B 10 1 5 0 04B 50 5 0 48 200 0 8 0 03B 10 0 8 0 03B 10 0 8 0 03B 10 1 5 0 03B 50 5 0 3 200 0 4 0 05B 40 3 0 05 50 0 4 0 03B 40 3 0 03B 150 iko 0 4800kQ 0 15 0 010 10 0 1 0 010 10 0 15 0 050 10 0 15 0 050 10 0 4 0 05a 40 0 6 0 058 50 0 05 350 1 9999kQ 0 1 0 005a 10 0 1 0 005a 10 0 1 0 03a 10 0 1 0 03a 10 0 4 0 03a 40 0 6 0 038 40 3 0 05B 350 1 800kQ 0 4 0 05a 40 1 0 05a 100 3 0 05a 400 10kQ 19 999kQ 0 4 0 03a 40 1 0 03a 70 3 0 05a 300
28. 440466 6110 EMAIL sales tegam com 6 2 Model 3550 LCR Meter Instruction Manual Service Information Repair Parts The Model 3550 has no user replaceable parts Available accessories are listed in Section I 6 3 Model 3550 LCR Meter Instruction Manual Service Information Troubleshooting The TEGAM Model 3550 has been designed to provide many years of trouble free performance However there are some instances where harsh operating environments or excessive physical strain may cause premature failure Should a malfunction of the 3550 be observed it is recommended that certain steps be taken in order to assist our service department in identifying the cause of the malfunction and to provide the quickest possible turn around time for the repair cycle Below is a summary of some commonly observed symptoms and some possible remedies for ruling out the possibilities of user error or environmentally related problems No Display The display is completely blank e Check the power supply Make sure that the AC line is operational and is supplying power to the unit e Check the fuse located in the rear panel If a blown fuse is identified there is usually a reason for the fuse blowing so the probability of another related problem is high Unstable Reading The reading bounces erratically with no apparent pattern Be sure that the Operating Instructions have been reviewed and thoroughly understood Constant voltage or consta
29. C When I is pressed the test current flowing through the DUT will be displayed Pressing either the UP or DOWN keys will adjust the test current level The test current decimal point and units can be set by using the SHIFT I key sequence Programmable test currents are available from 0 01mA 99 99mA for test frequencies of 42 0Hz 1 00MHz For test frequencies above 1 00MHz the current can be set between 0 01mA and 20 00mA The 3550 s test current is adjustable in 0 01mA steps and is displayed to three significant digits When in the constant current mode and the UP or DOWN keys are pressed DISPLAY C will momentarily show the open circuit test voltage setting before displaying the actual current flowing through the test device If either the UP or DOWN key is pressed and held the voltage setting will display and the setting will either scroll up or down depending on whether the UP or DOWN key is pressed TEGAM Model 3550 LCR Meter Instruction Manual Operating Instructions Front Panel Description cont d Test Signal Modes CV CC Model 3550 is capable of three different measurement modes These are Open Circuit Test Voltage Mode Constant Voltage Mode and Constant Current Mode The active measurement mode can be confirmed by looking at the V I and CV CC LED Keys in the DISPLAY C panel The relationship between the operation modes and the LED displays are as follows Table 4 4 CV CC Indica
30. C or R on DISPLAY A 3 Press the FREQ key and adjust the frequency using the UP or DOWN keys or by manually entering a new value for test frequency See SHIFT 0 Frequency Set Mode for more details on manually setting the test frequency 4 Press the V key and adjust the measurement voltage using the UP or DOWN keys or by manually entering a new value for test frequency See SHIFT 1 Test Voltage Set Mode for more details on manually setting the test frequency 5 Press the AUTO key in the RANGE panel and verify that the AUTO LED is on This puts the 3550 in AUTO range NOTE When repeatedly measuring DUTs with similar values selecting the manual mode allows the measurement time to be shortened by eliminating the time needed for switching the ranges See RANGE Selection Panel for more details 6 Press the AUTO key in the CIRCUIT MODE panel and verify that the AUTO LED is on 7 Press the INT key in the TRIGGER panel and verify that the INT LED is on This will continuously trigger the 3550 and update the reading shown on DISPLAY at a rate determined by measurement frequency delay time number of averages and the time taken to auto range If MAN EXT trigger mode is selected the reading will not be updated until a new trigger is received from the front panel or remote interface 8 Connect the DUT to the measurement terminals The CIRCUIT MODE and RANGE will be automat
31. Kelvin connections to leaded 3505 GPIB Interface components The jaws are assembled with hardened gold plated beryllium 3550 900 01 User s Manual copper which ensures low contact resistance low thermal emf to copper AS a high corrosion resistance and long Hard Copy service life An alligator clip is provided allowing connection of a passive guard The assembly includes a 5 ft 1 5m cable for connection to the 3525 NOTE Under certain measurement conditions Kelvin Klips can cause a loss of measurement accuracy Fixtures RS 232 Null Cable OPIN 25 PIN 3511 SMD Test Fixture 3510 3511 or 2005B chip tweezers Available for performing three are recommended for the following 010 ara tare ES i terminal measurements on surface component values y De mount devices Connects directly to dl the front panel of the 3550 Use the C lt 100pF L lt 1004H R gt IMQ 3511 for medium and high impedance measurements 1 4 Model 3550 LCR Meter Instruction Manual Instrument Description Performance Specifications The advertised specifications of the model 3550 are valid under the following conditions 1 The instrument must be verified and or adjusted using the methods and intervals as described in the calibration section of this user s manual 2 The instrument must be in an environment which does not exceed the limitations as defined under Environmental in the Miscellaneous Specifications section 3
32. Measurement Circuit Mode is set to AUTO the Parallel Mode PRL or the Serial Mode SER is automatically selected by the instrument based on the Measurement Range The measurement range is determined by the instrument by the magnitude of Z with no regards to D or Q of the DUT Thus the measured values of a component will vary depending on whether series or parallel equivalent circuit modes are used The relationship between series and parallel equivalent circuit measurements is illustrated in Table 4 1 Table 4 1 Relationship Between Series and Parallel Equivalent Circuit Values Equivalent Circuit Dissipation Conversion Formula Mode Factor D As a general rule when measuring components where the reactive component is high gt 10kQ then the parallel equivalent mode should be used as parallel leakage becomes more significant to the measurement For low reactance components lt 10 the series equivalent mode should be used since lead resistance becomes more significant to the reading than parallel leakage For measurements of component values that fall somewhere in between follow the manufacturer s recommendations TEGAM Model 3550 LCR Meter Instruction Manual Operating Instructions Measurement Tips cont d Negative Capacitance or Inductance Readings If a capacitor is connected to the 3550 while in the inductance measurement mode or if an inductor is connected to the 3550 while in the capacitance m
33. October 2008 The following procedure describes the steps necessary to change the 3550 power settings from factory default settings to a new setting 1 Verify that there is no power connected to the unit 2 Change the line selector switch located on the rear panel of the 3550 to the desired operating voltage by using a small screwdriver to turn the voltage selection switch to the desired position Refer to the figure below E With your screwdriver turn the y desired voltage number to the black arrow For example the setting here is for 240V 3 The fuse size may need to be changed as a result of the increased or decreased voltage operation Please refer to the table above for detailed fuse information The rear panel of the 3550 will also contain information regarding fuse sizes and types The instrument is ready for power up Proceed to Quick Start Instructions for continued operation 2 6 Model 3550 LCR Meter Instruction Manual Quick Start Instructions SPECIFICATIONS PREPARATION FOR USE QUI CK START INSTRUCTIONS OPERATING INSTRUCTIONS PROGRAMMING amp INTERFACING SERVICE INFORMATION APPENDIX Model 3550 LCR Meter Instruction Manual Quick Start Instructions The Model 3550 is a versatile product which can be used in many different configurations Because of its ability to measure a large number of impedance parameters under a dynamic range of test frequencies amplitudes and confi
34. Panel will flash a numeral 1 Press a numeric key 1 9 to set the active bin number BIN O cannot be used with the comparator function Then press the CURSOR key once again so that the 5 digit of DISPLAY A starts to flash 4 Enter the nominal digit value of the comparator setting After a value has been assigned for each digit the decimal point will start to blink Use the DP key to position the decimal point and then press the CURSOR P key to set the unit prefix of measure Press the UNITS key to select the desired prefix for the DISPLAY A nominal value setting NOTE Units of measure in DISPLAY A or DISPLAY B cannot be changed once the comparator has been enabled The IGNORE function and the equivalent circuit mode setting are also locked out 5 After the prefix units for the nominal value have been selected press the CURSOR key The 5 digit of DISPLAY B will begin to blink indicating that a value can be entered for the DISPLAY B measurement Enter a nominal value setting for DISPLAY B then press the CURSOR key 6 The 4 digit of DISPLAY C will display a blinking 0 Press the 1 key to enter the High and Low Percent Limits Mode 4 37 Model 3550 LCR Meter Instruction Manual Operating Instructions The Comparator cont d Percent Value Settings cont d 7 To input an upper limit threshold value press the HIGH key Press the LOW key to set the lower limit threshold value Then hi
35. Series Equivalent Circuit Mode of the 3550 can be used for testing devices where series impedance has a great effect on the measurement Parallel Equivalent Circuit Mode is used for testing devices with high reactance where parallel leakage becomes more significant The formulae in Table 4 7 can be used to convert readings in one equivalent circuit mode to the other Note that the measured value of D or Q will not be different whether it is measured in Series or Parallel Equivalent circuit mode TEGAM i Model 3550 LCR Meter Instruction Manual Operating Instructions Operating the 3550 Preparation Check the Power Source Voltage The voltage range of this machine is displayed on the rear of the machine The power voltage may be selected using the switching plug on the rear panel See Preparation for Use for more setup details When the POWER Switch is turned ON the settings of the machine will be same as when the power was previously turned off In order to reset the 3550 simply press MAN EXT at the same time the POWER key is pressed Resetting will clear the zero correction factors and return the instrument settings to factory defaults A table summarizing the factory default settings can be found in Chapter 3 Quick Start Instructions How to Perform a Zero Correction Determine whether test leads an adapter or some other fixture will be used to make measurements and connect it to the front panel BNC terminals Perform a S
36. Unit Test Piece Voltage Temp Value Exponent 4k KKK ok e g 10 00mA gt 10 000E 03 0 01mA 10 000E 06 Test Piece Current Unit O OverRange IN Measurement Data Normal U Under Range E Eror L Inductance Measurement L C Capacity Measurement C R Resistance Measurement R Zo Impedance Measurement Z Y Admittance Measurement Y Series Mode Measurement Parallel Mode Measurement Z Y symbols ASCII Code 2Dh Over Range Measurement Data Abnormal Under Range Measurement Data Normal Measurement Data Exponent p n M m k M lol la lu La alal SEL 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Table 5 5b Data Output Code Functions cont d Output Code Content DISPLAY A Display Unit For Inductance Measurement For Capacity Measurement For Resistance Impedance Measurement For Admittance Measurement LOW NO GO O G O HIGH NO GO Comparator OFF ASCII Code 2Dh outputted 2 times Over Range Measurement Data Normal Loss Coefficient Measurement D Quality Measurement Q Equivalent Series Resistance Measurement Rs Equivalent Parallel Resistance Measurement Rp Conductance Measurement G Reactance Measurement X Susceptance Measurement B Phase Angle Measurement 8 Over Range Measurement Data Abnormal 7 00 Oo 1 9999 de FER Under Range Measur
37. are 4 LED s displaying the interface status of GPIB They light up under the following circumstances SRQ An SRQ service request is being sent from the 3550 to the GPIB bus line LTN The 3550 is set to be the Listener TLK The 3550 is set to be the Talker RMT The 3550 is being controlled remotely When the GPIB bus line receives the commands REN MLA REN and enters remote mode LOCAL Key Switch Pushing the LOCAL key switch changes the machine to front panel operation GPIB Switches Delimiter Talk Only Address Switch The optional GPIB board has switches for setting the Delimiter and Address TALK DELIMITER ADDRESS A B A5 i A n Al ADDRESSABLE When setting the GPIB address exercise caution not use the same address as other GPIB devices on the same bus Please set the TALK ONLY ADDRESSABLE switch to the ADDRESSABLE side and establish different addresses for each device On the TALK ONLY side a GPIB interface may be installed or the Listen only Mode Printer may be used Delimiter Output Format Four output format choices are available using switches A amp B of the DELIMITER as shown below in chart 9 4 Added to last line of data Output Code a FEE Return New Line also EO CR LF 0 1 Return only cr 1 0 New Line only 1 1 OT line is LOW La The Address switches A5 through A1 can be set within the binary range of 00000 11110 and decimal range of 0 30 In binary 11111
38. be observed occupying the same display as the most significant digit 1 The minus sign indicates a negative phase angle from a capacitive reactance Xc This is normal functionality in order to maximize the number of significant digits for an upper range measurement Display B indicating 16 775Q Xc Value Display B indicating 16 775Q X Value LU TIC rT IIL _ 4 34 Model 3550 LCR Meter Instruction Manual Operating Instructions The Comparator Important Notes for the Absolute and Percent Comparator Functions Comparator settings can only be defined and stored into panels 1 9 Before a comparator setting can be defined a panel 1 9 must be recalled This is done by pressing the 0 9 key until the desired panel is active while the 3550 is in the measurement mode Settings for DISPLAY A DISPLAY B and CIRCUIT MODE must be finalized in the panel setting 1 9 before defining comparator upper and lower limits This is because these values cannot be changed after the comparator high and low limits have been set If any of the DISPLAY A DISPLAY B or CIRCUIT MODE keys A B AUTO SER PRL are pressed after the comparator limits have been set the LOW and HIGH LEDs of the comparator will start flashing to indicate an illegal operation If either the LOW or HIGH keys are pressed afterwards then all of the comparator settings will be cleared This will be indicated by appearing on the display Pressing any other key
39. beep three times and will not return to measurement mode if a programmed test current exceeds the instrument s sourcing capability SHIFT 3 Averaging Set Mode You can define the number of measurements the 3550 makes before it produces a readable measurement Averaging is used to stabilize the output reading and to increase the accuracy of a reading To set the number of averages per reading press SHIFT gt 3 The active average setting will be displayed on DISPLAY B The first digit will flash indicating that one of the numeric keys 0 9 must be pressed to set the value of the first digit Once a value has been entered then the next digit will flash Enter the desired values for the three digits and press the ENTER key to store the new setting The number of averages may be set from 1 100 readings If an illegal value is attempted the instrument will beep three times when the ENTER key is pressed to indicate that the attempted value is outside of the instrument s acceptable range SHIFT 4 Key Lock Mode In the Key Lock mode all front panel keys except the SHIFT Key 4 Key and in the case that the Measurement Trigger is set to Manual the MAN EXT Key will be locked The Key lock mode is used to protect the 3550 settings from unintentional changes To access the Key Lock Mode settings press the SHIFT 4 keys A single digit either a 1 or a 0 will be displayed in DISPLAY B Set the digit to
40. details 2 Spot Zero Correction allows up to three user defined frequencies to be corrected see SHIFT gt 8 p 4 14 to define spot frequencies SHIFT OPEN p 4 16 for Open circuit spot correction amp SHIFT SHORT p 4 16 for short circuit spot correction 3 Correction Frequency Limit Mode allows the user to define a range of test frequencies to be zero corrected during a standard zero correction Refer to SHIFT p 4 16 and 4 p 4 9 for more details 5 RANGE Selection Panel AUTO DOWN UP The Range panel is used to select either automatic or manual measurement ranges If AUTO range is used to find the correct measurement range and the 3550 is then switched to MANUAL range the 3550 will retain the current measurement range e AUTO Pressing the AUTO key will toggle between Auto and Manual Range Modes When the 3550 is in the AUTO mode the pushbutton will be illuminated When the instrument is in the manual mode the AUTO pushbutton is not illuminated e DOWN In the manual mode pressing the DOWN key will lower the range of the instrument The DOWN key will flash to indicate when the current range is under ranged and needs to be lowered for a reading to take place When the DOWN key is pressed then an audible beeper will sound to indicate that the range has been lowered e UP In the manual mode pressing the UP key will raise the current range of the 3550 The UP key will
41. digits Next press the DP key to position the decimal point Press either of the CURSOR or CURSOR lt keys to highlight the frequency units Press the UNIT key until the desired frequency units annunciator starts to blink Press the ENTER key to finalize the spot frequency setting To disable the Spot Correction Frequency make sure that you are in the spot frequency editing mode press SHIFT 8 use the CURSOR keys to highlight DISPLAY C When this is done press the IGNORE key to erase the current spot frequency setting Model 3550 LCR Meter Instruction Manual Operating Instructions Front Panel Description cont d SHIFT gt 9 RS 232C Settings Mode For the RS 232C the baud rate data length parity and stop bit can be defined by the user Press the SHIFT 9 key to enter into the RS 232C setup mode After entering the RS 232C setup mode you will notice that the BIN LED will begin to blink Press a key from 1 4 to select the RS 232C parameter that you wish to set 1 Set the Baud Rate Default 5 9600BPS 2 Set the Data Length Default 1 8 Bits 3 Set the Parity Default 0 No Parity 4 Set the Stop Bit Default 0 1 Stop Bit Notice that after selecting a parameter from 1 4 DISPLAY B will show a number that corresponds to the parameter setting as summarized in the tables below Use the tables to determine the appropriate setting for the RS 232C communications Use the CURSOR db or CU
42. flash to indicate when the current range is over ranged and needs to be raised in order for a reading to take place When the UP key is pressed then an audible beeper will sound to indicate that the range has been raised 4 9 Model 3550 LCR Meter Instruction Manual Operating Instructions Front Panel Description cont d 6 SHIFT Key The SHIFT key has dual functionality Its primary purpose is to allow access to the secondary functions of the numeric keys Its secondary function allows the user to switch from Remote communications Mode GPIB or RS 232C Operation to Local Front Panel Operation Below is a summary of the secondary functions accessible by pressing the SHIFT key and then a corresponding function key The secondary function keys are 0 9 OPEN SHORT and For descriptive convenience notation such as SHIFT O etc will be used to indicate that first the SHIFT Key should be pushed and then the 0 Key SHIFT 0 Frequency Set Mode The 3550 test frequency settings may be programmed from 42 0Hz to 5 00 MHz with a resolution of three significant digits If DISPLAY C is set to indicate test frequency and the 3550 is in the Measurement mode the frequency can be adjusted changed by pressing the UP and DOWN keys in the DISPLAY C panel Pressing SHIFT 0 will cause the 3550 to enter the frequency set mode Entering the Frequency Values The most significant digit in DISPLAY C wil
43. following WCL through program code ERROR 1201 FREQUENCY SETTING RETATION ERROR Input miss of character code following FRE SPF through program code Ver COMMUNICATION ERROR Miss communication when sending Ver Command through program code 1603 COMPARATOR SW SETTING ERROR When turning on program code C1 comparator ON in panel O 1604 FUNCTION A ERROR Input miss of character code for FA0 FA4 through program code 1605 FUNCTION B RANGE DATA OUTPUT ERROR Input miss of character code for FB0 FB7 R0 R9 REN through program code 1606 VOLTAGE SETTING MEASUREMENT AVERAGE Input miss of character code for V001 V101 Ver which is out of LEV setting VERSION ERROR range through program code 1607 PANELNUMBER SETTING ERROR Input miss of character code for FANO FAN9 through program code
44. illuminated The 3550 is now operating in Constant Current Mode Calculating the Maximum Allowable Constant Current Setting The figure bellow is an equivalent circuit of the Output Oscillator of the 3550 When connected to a DUT of a known impedance Z and known phase angle theta the constant current maximum limit may be determined by using formula 2 NOTE The absolute maximum allowable constant current setting regardless of DUT impedance is limited by the instruments sourcing capability This maximum amount is 35 74mA 500 DUT CG lt A AA IZ 50 Z cos j sing Formula 2 OSC Where CC Constant Current Setting Limit V Maximum Oscillator Voltage Setting Sample Calculation For a test frequency of 1 kHz Z 100 and theta 0 45 the maximum constant current setting is calculated as follows 5 eee a 50 Z cos j Zsin0 5 OC Sa TRA A TR 50 100cos45 j 100sin45 CC lt 0 03083 j 0 01806 CC lt 0 03573 A A 4 Table A 1 Basic Accuracy Table Measurement Frequency
45. limits of DISPLAY A and DISPLAY B to be ignored Percent Value Percent Settings must fall within the Measurement Ranges of DISPLAY A and DISPLAY B Limit Values of 00000 999 99 for both DISPLAY A and DISPLAY B Comparator Settings must be applied to existing panels Up to 9 programmable bins 1 9 may be defined Bin O is reserved for measured values that fall outside of the limits e User may program the High or Low limits of DISPLAY A and DISPLAY B to be ignored 1 10 Model 3550 LCR Meter Instruction Manual Instrument Description Performance Specifications cont d Comparator Binning Absolute Limits Operation Table 1 7a Absolute Comparator Operation LOW LIMIT lt Measurement Value lt HIGH LIMIT Measurement Value lt LOW LIMIT HIGH LIMIT lt Measurement Value TOTAL GO When both DISPLAY A and DISPLAY B are not LO or HI Comparator Binning Percent Limits Operation The location of the decimal point affects the comparator binning values Table 1 7b Percentage Comparator Operation LOW LIMIT lt Measurement Value lt HIGH LIMIT Displays Table 1 8 Numeric Displays and Annunciators Model 3550 LCR Meter Instruction Manual Instrument Description Performance Specifications cont d Digital Interfaces RS 232C Standard interface GPIB Optional Interface Control I O Standard Interface Connector External Control Signals CONTROL PANEL EXT EXT TRIGGER PANEL No Isolated Ex
46. only If DISPLAY B comparator is disabled then the TOTAL GO condition is determined by DISPLAY A only Sample LED Trigger Status This LED displays the measurement status When the TRIGGER mode is set to INT this LED will flash continuously When the TRIGGER mode is set to MAN EXT this LED will flash every time a measurement is made COMPARATOR ON OFF Switch ON This switch enables or disables the Comparator When the switch is in the ON state LED on the BIN Display LED Comparator State Annunciators and Comparator functions are enabled DISPLAY B Parameter Selection Key B Press this key to select the measurement parameter of DISPLAY B Measurements of D Q RS RP G X Band O are available DISPLAY B Measured values of D Q RS RP G X B and are shown in this panel The measurements values are displayed with 4 digit resolution In addition units of measure are annunciated above and beside the display for reading convenience To change the parameters shown by DISPLAY B press the B key located in the DISPLAY A B instrument panel until the desired annunciator is lit Model 3550 LCR Meter Instruction Manual Operating Instructions Front Panel Description cont d 21 DISPLAY C Measurement Panel FREQ V I CV CC DOWN UP The keys on the DISPLAY C Measurement panel are used to set the measurement frequency constant voltage voltage or constant current mode test signal amplitude
47. received by the computer prior to line 1260 of sample bas the computer will send the command line E3 REN O1 to the 3550 LCR meter For more details regarding E3 REN O1 and other commands refer to the command summary Tables 5 3a amp 5 3b on pages 5 11 and 5 12 Basically the RS 232C will use the external trigger and output the measurement data to an external device The textual signal that the computer receives at this point will be displayed on the CRT The VER in 1110 is the output command of the ROM version The wait times indicated in 1120 and 1125 allow time for the computer to read the data When the display is finished the program will end 5 24 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Sample programs for RS 232C SAMPLE BAS 1000 REM sample bas 1010 OPEN COM N81 AS 1 CLS 1030 ON COM GOSUB RECIEVE 1040 COM ON KAN 0 1050 1055 LABEL 1060 GOSUB WAIT10 1070 IF KAN O THEN GOTO LABEL 1080 1100 LABEL2 1110 PRINT 1 VER 1115F 0 1120 GOSUB WAIT10 1125 IFF O THEN GOTO 1120 1130 PRINT end 1140 COM OFF 1150 END 1160 1170 RECIEVE 1180 IF LOC 1 lt gt 0 THEN GOTO 1200 1190 GOTO 1290 1200 GOSUB WAIT10 1210 W INPUT LOC 1 1 1220 D LEFT W 6 F 1 1230 IF D 3550 AND KAN 0 THEN GOTO 1260 1240 PRINT LEFT W LEN W 3 1250 GOTO 1290 1260 PRINT 1 E3 REN O1 1270 PRINT D 1280 KAN 1 GOSUB WAIT10 1290 RETURN
48. recommended test mode In general parallel mode is used when the reactance of a device is large Parallel mode should be used when a capacitor s leakage or an inductor s core losses significantly affects the reading Series mode is recommended for small reactance measurements in capacitors and inductors where series lead resistance must be considered and leakage and core losses become negligible e AUTO When this key is illuminated the instrument is in AUTO equivalent circuit mode This means that the 3550 will automatically select either series or parallel equivalent circuit mode based on the impedance of the DUT It does not necessarily mean that the correct equivalent circuit mode will be selected e SER Series equivalent circuit mode is typically desirable for low reactance measurements This is because Rs or series resistance becomes more significant than parallel resistance to the measured value e PRL Parallel equivalent circuit mode is often more effective for measurement of impedances with high reactive components This is because in a capacitor or inductor with a high reactance the parallel leakage is more significant to the measured value 3 TRIGGER Panel INT MAN EXT Select either an internal or external trigger by pressing either the INT or MAN EXT key The active trigger mode of the 3550 is indicated by an illuminated pushbutton e INT When the INT key is pressed the 3550 operates in the continuo
49. the instrument Refer fuse replacement to qualified service personnel Do Not Use in Explosive Environments WARNING The 3550 is not designed for operation in explosive environments Do not Operate Without Covers WARNING This device should be operated with all panels and covers in place Operation with missing panels or covers could result in personal injury FOR QUALI FI ED SERVI CE PERSONNEL ONLY Servicing Safety Summary Do Not Service Alone Do not perform service or adjustment on this product unless another person capable of rendering first aid is present Use Care When Servicing with Power On or Off Dangerous voltages may exist at several points in this product To avoid personal injury or damage to this equipment avoid touching exposed connections or components while the power is on Assure that the power is off by unplugging the instrument when removing panels soldering or replacing components WARNING The instrument power source is electronically controlled meaning that there is power present throughout the instrument even when the instrument is in the OFF state Always unplug the instrument and wait 5 minutes before accessing internal components Power Source This product is intended to connect to a power source that will not apply more than 250V RMS between the supply conductors or between either supply conductor and ground A protective ground connection by way of the grounding conductor in the power cord
50. the main unit follow the following directions 1 Turn OFF the power of the 3550 and remove the AC line cord Remove screws 1 and 2 of the cord hook on the upper part of the rear side and proceed to remove the top cover by pulling it rearward Figure 5 4a Rear View 2 Remove screws 3 and 4 from the blank panel and then remove the blank panel 3 Next install the GPIB board Insert the GPIB board into the main unit through the place in the rear where the blank panel came off Then tighten screws 3 and 4 5 30 3550 LCR Meter Instruction Manual Programming and Interfacing The GPIB Interface Installation of the GPIB Board Option 3505 cont d Figure 5 4b Side View Slide the GPIB card into the slot and tighten screws 3 and 4 4 Then connect the cable 6 of the GPIB board with the connector of the Control Board 5 5 Match the 2 holes 7 and 8 to the pillars on the Control Board and tighten the screws Figure 5 4c Top View 6 Replace the top cover NOTE The input and output commands amp formats for GPIB are the same as they are for RS232C Refer to the previous section on RS 232C communications for details regarding specific commands and formats 3550 LCR Meter Instruction Manual Programming and Interfacing The GPIB Interface Front Panel Status Display LEDs On the front of the main unit there
51. to BIN 0 For instructions regarding the pin connections of the Control I O Connector refer to Programming and Interfacing Audible Buzzer Operation When the SHIFT 5 Comparator Buzzer Function is set to 1 the buzzer will sound with a TOTAL GO condition If it is set as 2 the buzzer will sound with TOTAL NO GO condition If the buzzer function is set to 0 then the buzzer will be disabled See SHIFT 5 Comparator Buzzer Function for more information on setting the comparator state buzzer function 4 41 4 42 TEGAM Programming and Interfacing INSTRUMENT DESCRIPTION PREPARATION FOR USE QUICK START INSTRUCTIONS OPERATING INSTRUCTIONS PROGRAMMING amp INTERFACING SERVICE INFORMATION APPENDIX 3550 LCR Meter Instruction Manual 5 1 3550 LCR Meter Instruction Manual Programming and Interfacing Interfacing to the 3550 This section provides detailed information about the 3550 electrical interfaces and their functionality It will provide all of the necessary information required to integrate the 3550 easily into a working test application A Control I O connector is available for optically coupled TTL interface to PLCs and other control hardware The 3550 has a standard RS232 communications port and an optional GPIB interface for software based applications Control 1 0 Connector Located on the rear panel the Control I O Connector offers an optically isolated TTL level interface for integ
52. to be performed instead of a Standard Zero Correction Frequency Limit and Spot Frequency Zero Corrections allow the user to define the specific frequencies to be open and short compensated Frequency Limit and Spot Frequency Corrections can also be used to shorten the total zero correction time by ignoring unused test frequencies If the proper frequency correction has been performed and the test leads fixture continues to fail zero correction have the leads fixture tested by an authorized service person A Detailed instructions for performing open or short circuit zero corrections are found in the Measurement Tips and in Front panel Description sections of this manual Make sure that front panel operation and LCR measurement technique is thoroughly understood before proceeding further LCR measurement can be quite complex and the slightest overlooked detail could greatly affect measurement accuracy To maximize measurement accuracy it is highly recommended that this chapter be understood in its entirety Model 3550 LCR Meter Instruction Manual Operating Instructions Operating the 3550 cont d Measuring Inductance L Capacitance C and Resistance R 1 Always perform a zero correction procedure if the condition of the test leads fixture has changed This procedure must be performed before making a measurement Refer to How to Perform a Zero Correction for more details 2 Press the A key and select L
53. values are dependent on the phase of the device under test If the Standard is beyond 1 degree in phase for resistance values the tolerance must be recalculated Exceptions are 1M ohm and 10M ohm which should be within 2 degrees and 100M ohm which should be within 5degrees TEGAM 3550 AND AGILENT 4285A MEASUREMENTS IA E AR ai i cn e ED AE He AI 10kQ Z o ARB ik 205 iwa i a e io IE A 400k iM i 12 po A B 100 605 __ 100kQ iM i 8 AB 100 183 4o09 SMa A B 100 355 1000 5M 1 de A B 100 153 Lika 15M di fz AB 10K 655 __ suka 5M di de JJ A B 100 353 NOTE Phase values are dependent on the phase of the device under test If the Standard is beyond 1 degree in phase for resistance values the tolerance must be recalculated 6 11 Model 3550 LCR Meter Instruction Manual Service Information Model 3550 Calibration Adjustment Procedure Please contact TEGAM in order to obtain Calibration or Repair Service for your Instrument 6 12 Appendix SPECIFICATIONS PREPARATION FOR USE QUICK START INSTRUCTIONS OPERATING INSTRUCTIONS PROGRAMMING amp INTERFACING SERVICE INFORMATION APPENDIX A 2 Model 3550 LCR Meter Instruction Manual Appendix Setting the Constant Voltage Mode To Enable the Constant Voltage Mode 1 Check and confirm that the CV CC button is not illuminated 2 Press the V button until Display C indicates voltage 3 Press the
54. 0 0E 03_OV_ 1 0000E 00V _ Vi _ P5_L_DO_R4_S_10 0E 03_CV_ 5 0000E 01V _ V1 _ P6_L_DO_R5_S_100 E 03_OV_ 1 0000E 00V _ Vi _ P7_L_DO_R6_S_100 E 03_ CC _ 1 0000E 00V _ V1 _ P8_L_DO_R7_S_5 00E 06_OV_ 1 0000E 00V _ Vi _ P9_L_DO_R7_S_2 21E 06_OV_ 1 0000E 00V _ Vi _ 6 9 Panel Number 2 DISPLAY A Function 3 DISPLAY B Function 4 Range Number 5 Measurement Circuit Mode Measurement Signal Frequency Temp Value Measurement Signal Frequency Exponent Measurement Mode Measurement Signal Voltage Temp Value Measurement Signal Voltage Exponent Measurement Data Averaging Comparator ON OFF Delimiter NOTE In the Output Format Sample the _ denotes a space ASCII Code 20h 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Monitor Output Format Output in Relation to Limit Monitor Command LIM Absolute Value Settings Mode This will output the PANEL No BIN No LOW LIMIT and HIGH LIMIT for BIN No 1 No 9 in the order of DISPLAY A and then DISPLAY B However if LIM is sent when the Panel Number is 0 the system will announce an error Output Format Sample P1_BIN1_CPO_ 9 9000E 03H 10 100E 03H_ 1 0000E 00R 10 000E 00R P1_BIN2_CPO_ 9 8000E 03H 10 200E 03H_ 10 000E 00R 100 00E 00R P1_BIN3_CPO_ 9 7000E 03H 10 300E 03H_ 100 00E 00R 1 0000E 03R P1_BIN4_CPO_ asti spinta Fissa P1_BIN5_CPO_ patas pias A P1_BIN6_CPO_
55. 0MHz 109 10kQ 102 10kQ 1 01MHz 5 00MHz 109 Minimum Model 2005B Chip Component Tweezers 2005B is designed for manual sorting of chip components from DC to 1MHz Four terminal tweezers make solid connections on chips up to 0 50 in 12 7mm long The set includes a 5 ft 1 5m cable for connection to the 3550 47422 Chip Tweezer Rebuild Kit Tweezer tips are intended to last from 100 000 to 500 000 operations This tip replacement kit includes 12 replacement tips 2 screws and 1 wrench TEGAM 42 gt Model 3550 LCR Meter Instruction Manual Operating Instructions Making Accurate Measurements cont d Zero Corrections Residual Impedance and Leakage of test fixtures exists for all types of test fixtures To maintain the performance accuracy of the 3550 it is highly recommended that a zero correction be performed whenever a change in test fixture takes place For test fixtures such as Kelvin Klip Leads where the positioning may vary extra effort must be made to perform the zero correction while positioning the leads in the exact location as the measurement will be taken When performing a standard zero correction the instrument will step through frequencies from 42Hz to 5MHz This takes a considerable amount of time and may not be desired in certain applications especially when the actual component test will take place at a single frequency point To overcome this the 3550 has the ability to perform spot frequency
56. 1 800MQ 34 0 225a 30 3 0 2250 30 3 0 225a 30 3 0 225a 105 30 0 225a 750 FORSE 19 999MQ i 3 0 15a 60 3 0 15a 60 100M0 18 00MQ 7 5 0 2254 750 7 5 0 225a 750 7 5 0 2254 750 7 5 0 225a 750 75 0 225a 750 199 99M 7 5 0 15a 600 7 5 0 15a 600 7 5 0 150 600 7 5 0 150 2250 75 0 150 1950 Upper Specification Accuracy of Z Nominal Counts Lower Specification Accuracy of 8 Nominal Counts ei x lei The count coefficient should be calculated as follows The Set Measurement Voltage a eS qe ei ina 10 000 Zx x the number of counts for Z A 11 IA N AAA AAA YN mm O gt LL O Cc O S O Q 3 x x O J_ gt 5 lt _ pz gt 9 x _ xX _ _ s fa CO So 2 we wc 6 lt Oo OoOo 3 60 O x O _ O N q x Error Codes DISPLAY CODE ERROR TITLE ERROR CONDITION Input miss of character code following C through program code 1105 NITIAL SETTING RELATION ERROR nput miss of character code following through program code 1106 MEASUREMENT SIGNAL COMMAND LOCK Input miss of charac
57. 10 1kHz 19 0kHz Typical Analog Measurement Time will exceed 40 ms For other frequencies 40ms will not be exceeded Conditions Averaging 1 range held RS 232C is OFF and Comparator ON With the RS 232C turned on and set to a baud rate of 9600 BPS the additional time needed for RS 232C communication is 100ms at any frequency setting Fixed Voltage Fixed Current Mode The measurement time can be up to 4X the time of the Open Terminal Voltage Mode Average Mode The user can define from 1 100 averages 1 9 Model 3550 LCR Meter Instruction Manual Instrument Description Performance Specifications cont d Measurement Terminals e 2 BNC Source Terminals e 2 BNC Detect Terminals e 1 Guard Banana Binding Post Parasitic I mpedance Correction Open Correction 1kQ or higher Impedance Short Correction Less than 1kQ Impedance Programmable Delay Time Measurements will be started after a trigger is detected from the front panel Control I O Connector or RS232C interface The delay time setting is user definable and ranges from O 10 seconds in 1ms increments GO NO GO Limits Comparator Binning Absolute Value e Absolute Settings must fall within the Measurement Ranges of DISPLAY A and DISPLAY B e Comparator Settings must be applied to existing preset panels e Up to 9 programmable bins 1 9 may be defined Bin 0 is reserved for measured values that fall outside of the limits e User may program the High or Low
58. 1299 1300 WAIT10 1310 FOR I 0 TO 1000 NEXT I 1320 RETURN 5 25 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Sample programs for RS 232C Explanation of SAMPLE2 BAS This sample program changes frequencies from 100Hz to 10 kHz in 100Hz increments and calculates the capacitor value and phase angle in relation to the changes Lines 1000 to 1070 are basic settings for the main unit of the 3550 e In Line 1130 PRINT 1 PAN2 E3 O1 FA1 FB7 indicates settings for measurement conditions that will calculate the condenser value and phase angle and output with RS 232C panel 2 TO trigger 01 The 3550 can store 10 pages of settings However the initial setting of the trigger is the internal trigger for EO so it is necessary to change the trigger mode to the mode of the external TO command immediately after changing the panel number Note that each command is separated by a space Also single commands like PRINT 1 TO are also possible but when the panels need to be changed complex commands such as below are necessary PRINT 1 PAN2 E3 e Lines 1150 to 1220 are where measurements are made while the frequency is changing Line 1180 is FRExxxxxx TO where xxxxxx is the frequency value setting and TO is the measurement trigger The wait times of 1200 and 1210 are used to wait for data reception and end of display The program will cycle through 1150 to 1220 until the measurement frequen
59. 400 5 0 10 400 5 0 10 400 50 0 10 700 Upper Specification Accuracy of Z Nominal Counts Lower Specification Accuracy of 8 Nominal Counts The count coefficient should be calculated as follows 10 000 ZX 79 000 P Zx Accuracy Limit from Measurement Limit Di X Maximum Voltage Limit for Chart The Set Measurement Voltage Zx the number of counts for Z Table A 2 Basic Accuracy Table 01V to 04V Measure Frequency ande Impedance Mesure Fregene o O 42Hz 99 9Hz 100Hz 1kHz 1 01kHz 10 0kHz 10 1kHz 30 0kHz 30 1kHz 100kHz 101kHz 1 00MHz 1 01MHz 5 00MHz 100m2 199 99m9 0 1800Q ae 6 2 4B 1200 4 8 0 248 60 4 8 0 248 60 4 8 0 24B 60 9 0 248 300 13 9332 6 1 28 120 4 8 0 188 60 4 8 0 188 60 4 8 0 188 250 9 0 188 300 18 002 0 9 0 128 60 0 6 0 128 60 0 9 0 128 60 ARE 199 990 0 9 0 06B 60 0 6 0
60. 50 in AUTO range NOTE When repeatedly measuring DUTs with similar values selecting the manual mode allows the measurement time to be reduced by eliminating the time needed for switching the ranges See RANGE Selection Panel for more details 6 Press the INT key in the TRIGGER panel and verify that the INT LED is on This will continuously trigger the 3550 and update the reading shown on DISPLAY A at a rate determined by measurement frequency delay time number of averages and the time taken to auto range If MAN EXT trigger mode is selected the reading will not be updated until a new trigger is received from the front panel or remote interface 7 Connect the DUT to the measurement terminals The RANGE will be automatically selected by the 3550 The Z or Y reading will be shown on DISPLAY A 4 33 Model 3550 LCR Meter Instruction Manual Operating Instructions Operating the 3550 cont d Measuring Loss Coefficient D Quality Q Equivalent Series Resistance Rs Equivalent Parallel Resistance Rp Conductance G Reactance X Susceptance B and Phase Angle 0 1 Always perform a zero correction procedure if the condition of the test leads fixture has changed This procedure must be performed before making a measurement Refer to How to Perform a Zero Correction for more details 2 Press the B key in the DISPLAY A B panel to select D Q Rs Rp G X B or 6 3 Press the FREQ key and ad
61. 99E3 1 00kHz 9 99kHz FRE10 0E3 FRE99 9E3 10 0kHz 99 9kHz FRE100E3 FRE999E3 100kHz 999kHz FRE1 00E6 FRE5 00E6 1 00MHz 5 00MHz Because the 3550 uses exponential number formatting for the test frequency variations of the above format may be used To set 100kHz the following methods are also valid e g FRE1 00E5 OR FRE10 0E4 Set the test frequency to 100kHz Setting the Number of Averages per Reading To change the number of measurements to be averaged use the V command can be replaced by values between 1 100 e g V55 Set the number of averages to 55 samples Errors in defining the number of samples to be averaged for a reading are addressed as follows Settings outside the range of 1 100 are considered program errors e g The values 0 or 101 would be considered invalid values for the average parameter 5 11 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Table 5 3a Command Summary Content Program Code PANO Panel DISPLAY A Measurement Function Panel Number DISPLAY A Measurement Item Change DISPLAY B Measurement Item Change DISPLAY B Measurement Function Auto Range Settings Rangel Range2 Range3 Range4 Range5 Range6 Range 7 Ranges Range9 Measurement Range Auto Mode Settings Series Mode Settings Parallel Mode Setting Measurement Mode Voltage Measurement Fixed Voltage Measurement Fixed Current Meas
62. Agilent 42037A 1kQ STANDARD RESISTOR E Wale connectors 863in centers Agilent 42038A 10kQ STANDARD RESISTOR POU tS alee N male connectors 863in centers Agilent 42039A 100kQ STANDARD RESISTOR FOR ts ale eines connectors 863in centers Process Instruments 106 1MQ STANDARD RESISTOR o ol measurement at Process Instruments 107 10MQ STANDARD RESISTOR LL of measurement at Process Instruments 108 100MQ STANDARD RESISTOR E of measurement at Capable of measuring at 1KHz Agilent 16089B Kelvin Clip Leads Through 100M ohms Agilent 4284A Precision LCR Meter TUE Range AO O Four Terminal Pair Agilent 4285A Precision LCR Meter PIA Pangen o CF oM Four Terminal Pair Agilent 42090A Open Termination OU anna A male connectors 863in centers Agilent 42091A Short Termination Four terminal BNC male connectors 863in centers Agilent 16385A 01 UF Standard Capacitor Four terminal BNC male connectors 863in centers Four terminal BNC male Agilent 16386A 1 uF Standard Capacitor ameda AR i Four terminal BNC male Agilent 16387A 1 uF Standard Capacitor A ORINECRORS T centers NOTE All required accuracy specifications and features of the Agilent equipment are not listed 6 7 Model 3550 LCR Meter Instruction Manual Service Information Model 3550 Verification Procedure cont d PREPARATION FOR TEST A SET UP THE TEGAM 3550 Cycle power on the 3550 and depress MANUAL to obtain manufacturer s default Set Display A to Z S
63. Ds indicate the status of remote communications using the 3550 s standard RS 232C and optional GPIB IEEE 488 2 interfaces All four annunciators are used for GPIB communications If the RS 232C is the controller then only the RMT LED is used 11 PANEL Selector Switch Pressing the 0 9 key in the Panel section allows the user to select a preset panel setting from 0 9 Each consequent press of the 0 9 key will increment to the next preset panel number The active instrument settings are automatically updated to the panel number indicated on the seven segment LED Panel Display LED If the instrument settings are changed while a panel number 0 9 is active and the panel key is pressed then the existing settings will be stored into the panel location indicated by the Panel Display LED Only panels 1 9 can have comparator limit values assigned to them 12 PANEL Display LED The PANEL Display LED is a seven segment LED that displays the active panel setting Press the 0 9 key located in the Panel Section to increment through panel settings 0 9 13 DISPLAY A Parameter Selection Key A Press this key to select the measurement parameter of DISPLAY A Measurements of L C R Z and Y are available DISPLAY A Measured values of L C R Z and Y are shown in this panel The measurements values range from 0000 to 19999 and are displayed with 4 digit resolution In addition units of measure are annunciated abov
64. LAY B Q S deg e Unit Display DISPLAY C Hz kHz MHz V mA Switch Indicator Lamps RANGE AUTO UP DOWN CIRCUIT MODE AUTO SER PRL SHIFT DISPLAY C V I CV CC TRIGGER INT MAN EXT SAMPLE 1 6 Model 3550 LCR Meter Instruction Manual Instrument Description Performance Specifications cont d Measurement Frequency Table 1 2 Model 3550 Measurement Frequencies 42 0Hz 99 9Hz 0 1Hz Steps 100HZ 999Hz 1Hz Steps 1 00kHz 9 99kHz 10Hz Steps 10 0kHz 99 9kHz 100Hz Steps 100kHz 999kHz 1kHz Steps 1 00MHz 5 00MHz 10kHz Steps Measurement Frequency Accuracy 0 01 Measurement Signal Level Table 1 3 Model 3550 Measurement Amplitudes Frequency Range Test Voltage Test Current Range Range 42 0Hz 1 00MHz 0 01 5 00Vrms 0 01 99 99mArms 1 01MHz 5 00MHz 0 05 1 00Vrms 0 05 20 00mArms Open Terminal Voltage Mode e Increment Resolution 0 01V Steps e Max Shorting Current 99 99mA Dependent on Measurement Frequency Fixed Voltage Mode e Increment Resolution 0 01V Steps e Max Shorting Current 99 99mA Dependent on Measurement Frequency Fixed Current Mode e Increment Resolution 0 01mA Steps e Max Shorting Current 99 99mA Dependent on Measurement Frequency Model 3550 LCR Meter Instruction Manual Instrument Description Performance Specifications cont d Monitor Functions Voltage Monitor 0 00V 5 00V Current Monitor 0 00mMA 99 99mA Settings and Monitor Accuracy Table 1 4 Mod
65. OTE The 1 digit is restricted to only a 1 or 0 setting When this is complete the decimal point will flash Press D P to move the decimal point to the desired position Then use the cursor to highlight the unit Press the UNIT key until the required unit annunciator is lit This designates the measurement unit for the Nominal value 5 Input the Nominal Value for DISPLAY B When the setting for DISPLAY A is complete use the cursor gt to highlight DISPLAY B Enter the 5 digits decimal point and unit just as in DISPLAY A If the setting is to be a negative value use cursors gt or to highlight the 1 digit of DISPLAY B then press to negate the value 6 Completing the Nominal Value Setting Press the HIGH key to finalize the Nominal Value Setting for the Comparator If the LOW key was pressed to enter into the Comparator Mode then press it instead of the HIGH key to exit the mode and finalize the settings 7 Setan Upper or Lower Limit for the Threshold Values To input an upper limit threshold value press the HIGH key Press the LOW key to set the lower limit threshold value Then highlight the first digit of DISPLAY C and press 1 3 7 Model 3550 LCR Meter Instruction Manual Quick Start Instructions Setting the Percent Comparator 8 Input the BIN No After selecting the threshold value input mode use the cursor key gt to highlight the bin LED and then press 1
66. PPOFSRURI Spot Correction Command Lock Measurement Conditions Monitor Measurement Data Averaging Data Output Spot Correction Clear Correction Value Spot Clear Correction Frequency Lock OFF Lock ON Limit ER Measurement Conditions Monitor Averaging Times Set 1100 Set so that data output will be through GPIB RS TO ZO Z1 Z2 Z3 Z4 LO MON V REN Measurement Data Output 2320 WCLI1 Effectively Low Frequency limit CL WCL42 0E0 WCL5 00E6 Low Frequency limit setting WCH High Frequency limit setting WCH42 0E0 WCH5 00E6 Data Output Destination O1 RS232C Only GPIB only valid with Installed Option Selection GPIB Only RS232C GPIB O T O i N 5 13 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Table 5 3c Command Summary cont d Program I came fama Version Spot Correction Input SPX Spot Correction Select from Spy Number 1 to 3 IO SPFXXX Set Spot Frequency SPF42 0E0 SPF5 00E6 Frequency Limit 1 indicates initial setting 2 If a non program code is entered it will be considered invalid and no setting will be made In this case the previous setting will be unchanged NOTE 1 After receiving L1 only LO TO and GET can be received NOTE 2 As soon as MON is sent make sure that the system is ready to receive NOTE 3 Settings will vary according to the measurement range and me
67. Precautions Cont d Symbols As Marked in This Manual This symbol denotes where precautionary information may be found As Marked on Equipment Caution Risk of Danger h Danger Risk of Electric Shock Earth Ground Terminal fo AP Chassis Terminal Alternating Current Earth Ground Terminal Guard Grounding the Equipment This product is grounded through the grounding conductor of the power cord WARNING To avoid electrical shock or other potential safety hazards plug the power cord into a properly wired receptacle before using this instrument The proper grounding of this instrument is essential for safety and optimizing instrument operation Danger Arising from Loss of Ground WARNING If the connection to ground is lost or compromised a floating potential could develop in the instrument Under these conditions all accessible parts including insulating parts such as keypads and buttons could develop a hazardous voltage and put the user at risk TEGAM 2 3 Model 3550 LCR Meter Instruction Manual Preparation for Use A Use the Proper Fuse To avoid fire hazard use only the correct fuse type as specified for the AC power supply in the Preparation for Use or Service sections of this manual Please note that the fuse rating for 100 amp 120 volt operation is different than the rating for 200 240 volt operation Information about the proper fuse type is also printed on the rear panel of
68. RSOR lt keys to navigate between the RS 232C parameter and the setting on DISPLAY B Press the ENTER key to finalize the settings and return to measurement mode BIN Display 1 Baud Rate Settings BIN Display 3 Parity Settings sori i RS 232C Settings DISPLAY B RS 232C Settings Settings 300bps et TT Cr 1200bps Oaa panty 4800bps 9600bps BIN Display 4 Stop Bit Settings BIN Display 2 Data Length DISPLAY B RS 232C Settings Settings Settings DISPLAY B RS 232C CI E CO E Model 3550 LCR Meter Instruction Manual Operating Instructions Front Panel Description cont d 4 16 SHIFT Correction Frequency Limit Setting Mode As an alternative to zero correcting the entire frequency range 42HZ 5MHz this function allows the user to set the correction frequency range in terms of upper and lower limits Press SHIFT to enter the Correction Frequency Setting Mode The BIN LED will be flashing Press either 1 to edit the low limit correction frequency or 2 to edit the high limit correction frequency Use the CURSOR or CURSOR lt keys to navigate between the BIN LED DISPLAY C Digits Decimal Point and Frequency Units To change the frequency value indicated on DISPLAY C simply press the 0 9 keys Press the DP key to change the position of the decimal point and use the UNIT key to select Hz kHz or MHz units Press the ENTER key in order to finalize the new setting and
69. S 232C Table 5 6a Monitor Output Code Functions Output Code Content Panel Number 1 9 Inductance Measurement L Capacity Measurement C Resistance Measurement R Impedance Measurement Z y Admittance Measurement Y QO Quality Measurement Q _ __ __ S O RP Equivalent Parallel Resistance Measurement Re Bo____ SusceptanceMeasurement 8 _______________ P Parallel Equivalent Circuit Mode ____ o gt o o RO Auto Range R6 AE R8 AE si Measurement Frequency Temp Value Le e g 42 0Hz 42 0 100Hz 100 1 00kHz 1 00 2K KX no E Measurement Frequency Exponent e g E 00 gt Hz E 03 kHz E 06 MHz Open Terminal Voltage Measurement Mode Fixed Voltage Measurement Mode Fixed Current Measurement Mode Test Piece Voltage Temp Value Exponent e g 1 00V 1 0000E 00 0 10V 100 00E 03 4 K KKKE4 KX Comparator ON Comparator OFF CetLe Delimiter for RS 232C is Ca L only BIN BIN Number 0 9 T N N 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Table 5 6b Monitor Output Code Functions cont d Limit Values 15 Minimum Maximum Inductance Measurement F Capacity Measurement RX KAKKELKKKK Resistance Serial Equivalent Resistance Parallel Equivalent Resistance Reactance S Admi S Admittance Conductance Susceptance La Loss Coefficient Qual
70. SURE END Input Pin A and K are the Anode A and Cathode K of the photo coupler LED Output is the Open Collector of the transistor of the photo coupler 5 5 3550 LCR Meter Instruction Manual Co ntrol 1 0 Connector cont d Table 5 2 Control 1 0 Function Summary PANEL 0 1 0 1 0 1 0 1 0 1 EXTERNAL TRIGGER OFF ON 5 15ms OFF 14 0 1 1 DISPLAY A GO NO GO DISPLAY B GO NO GO TOTAL GO NO GO BIN No TEST BUSY MEASURE END ERROR n sli A uu a I Input Pin The ERROR signal indicates a GO NO GO decision error When the range is wrong or the fixed current voltage setting value has not been reached 0 is outputted 5 6 1 for the Output Pins C E Open 0 C E Short Programming and Interfacing 3550 LCR Meter Instruction Manual Programming and Interfacing Control 1 0 Connector cont d Figure 5 4 Sample Diagram of External Connections to Sequencer CONTROL PANEL EXT A 5 24 VDC EXTERNAL TRIGGER A EXTERNAL TRIGGER K TOTAL GO EMITTER COMMON GND Inner Circuit Note The diagram above provides examples of typical input and output connections as required for interface to a sequencer Similar connections apply to the remaining terminals of the I O Connector 5 7 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Interface Cable The interface is based on RS 232C The 3550 is designed to act as
71. TEGAM Inc Model 3550 42 0Hz 5 00MHz Fully Programmable LCR Meter MODEL 3550 Instruction Manual PN 3550 900 01 Publication Date March 2010 REV L Copyright 2004 TEGAM Inc All rights reserved NOTE This user s manual was as current as possible when this product was manufactured However products are constantly being updated and improved Because of this some differences may occur between the descriptions in this manual and the product received Please refer to www tegam com for future updates of this manual Model 3550 Programmable LCR Meter Instruction Manual Model 3550 Programmable LCR Meter Instruction Manual TEGAM Table of Contents I INSTRUMENT DESCRIPTION iaa 1 1 INStr ment Descrio UO ee ceteceusceasaneicestupesaatetas sci seeeres sane eameeestacessdestaus 1 1 Feature OvervieW ccccccsuccccccsensecuveneusecccnseucesauseneuseneusencurseuausauseneureneuneueas 1 1 3550 Options ahd ACCCSSONES sari ra 1 4 Performance Specifications ccccccseeccuceeceuceeeetseceeueeneeucuueeteueerenneuuuureensags 1 5 Table 1 1 Model 3550 Measurement Range Limits a 1 5 Table 1 2 Model 3550 Measurement FrequencieS ns 1 7 Table 1 3 Model 3550 Measurement Amplitudes cece ee eee eee eeees 1 7 Table 1 4 Model 3550 Amplitude AccUuracies rr 1 8 Table 1 5 Model 3550 Measurement Ranges nan 1 8 Table 1 6 Typical Analog Measurement TIMES ri
72. The unit is allowed to warm up for a period of at least 30 minutes before measurements are taken A warm up period of 60 minutes is recommended after exposure to or storage in a high humidity non condensing environment 4 Only TEGAM manufactured Kelvin Klips Tweezers and other test fixtures are used with this device during measurements Measurement Parameters Inductance L Capacitance C Resistance R Impedance Z Admittance Y Dissipation Factor D Quality Q Equivalent Series Resistance Rs Equivalent Parallel Resistance Rp Conductance G Reactance X Susceptance B and Phase Angle 6 Measurement Ranges Table 1 1 Model 3550 Measurement Range Limits EXTERNA 9 999 o Jo BO 80 008 180 009 NOTE The Measurement Range is dependent on the Measurement Frequency The figures in parentheses are DUT impedance values 1 5 Model 3550 LCR Meter Instruction Manual Instrument Description Performance Specifications cont d Basic Accuracy 0 1 Display Specifications e Numeric Display DISPLAY A L C R IZ Y 4 gt digits e Numeric Display DISPLAY B D Q Rs Rp G X B 0 4 gt digits e Numeric Display DISPLAY C Frequency Voltage Current Terminal Voltage Terminal Current PANEL 3 digits e Unit Prefix Display DISPLAY A p n p m k M e Unit Prefix Display DISPLAY B n H m k M e Unit Display DISPLAY A F H Q S e Unit Display DISP
73. YOU baina a 4 22 Making Accurate Measurements cnn 4 23 Connections to the Device Under TESt_ rra rr 4 23 3 Termi al Measurement ina 4 23 4 or 5 Terminal MeaSuremEnts rn 4 23 Test Fixture Select spice iii 4 24 Table 4 4 Impedance and Frequency Limitations of Kelvin Klip Leads 4 24 Table 4 5 Impedance and Frequency Limitations of the SMD Test Fixture 4 25 ZOO COMCCUIONS uri ice ia 4 26 Table 4 6 Zero Correction LIMItS ii 4 26 Figure 4 4 Terminal Connections for Zero Correction noo 4 27 EQUIVGIENE CIF Sis tai a i n 4 28 Table 4 7 Equivalent Circuit RelationShipS i 4 29 OPeratina teo aires rita iaa 4 30 Mio iio AAA o PE e 4 30 How to Perform a Zero Correction i 4 30 Measuring L GC and Rissa niente 4 31 Measurina Z and Plinio 4 33 Measuring D Q Rs Rp G X B and 0 ri 4 34 Me Comparato sarria 4 35 Important Notes for the Absolute and Comparator Functions 4 35 Absolute Value Settings ria 4 36 Percent Value Settings messi 4 37 Ho nn PP dei 4 39 Figure 4 5 Sequenced Bin Sorting rr 4 39 Figure 4 6 Nested Bin SortinQ erre 4 40 Outputting the Comparator s RESUItS rr 4 41 Audible BUZzernOopEeration messi aia aa 4 41 Model 3550 Programmable LCR Meter Instruction Manual e TEGAM Table of Contents V PROGRAMMING AND INTERFACING
74. ally become 5 00V If the test frequency is greater than 1 00MHz voltages defined that exceed 1 00V will become 1 00V Setting Measurement Currents For frequencies from 42 0Hz to 1 00MHz the test current setting ranges from 0 01mA 99 99mA in 0 01mA steps If the test frequency is between 1 01MHz 5 00MHz the current setting are limited to 0 01mMA 20 00mA Unit mA Significant Digits 3 digits e g LEI1 00E0 Set the Measurement Current to 1 00mA LEI15 20E0 Set the Measurement Current to 15 20mA Like the voltage settings any values less than the 0 01mA resolution will be automatically truncated e g LEV1 549E00 Set the Measurement Current to 1 54mA The 3550 will automatically reassign test current levels if the absolute minimum or maximum levels are exceeded As shown above any current level defined with less than 0 01mA resolution will automatically be truncated to a value with 0 01mA resolution Defined current levels exceeding 99 99mA will automatically become 99 99mA If the test frequency is greater than 1 00MHz test current will be limited to 20 00mA TEGAM 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Input Format cont d Setting the Measurement Frequency The setting range for Measurement Frequency is between 42 0HzZ 5 00MHz Unit Hz Significant Digits 3 digits e g FRE42 0E0 FRE99 9E0 42 0Hz 99 9Hz FRE100E0 FRE999E0 100Hz 999Hz FRE1 00E3 FRE9
75. ance C Resistance R Absolute Impedance Z Absolute Admittance Y Dissipation factor D Quality Q Serial Equivalent Resistance Rs Parallel Equivalent Resistance Rp Conductance G Reactance X Susceptance B and Phase Angle 0 It has a wide measurement range and includes full adjustability of Measurement Frequency and Measurement Signal Level It also features Automatic adjustment for Zero Correction Range Switching and Series and Parallel Mode Switching The basic comparator function of the 3550 is extended to allow sorting of components to up to 10 different bins Up to 9 panels worth of measurement settings can be stored in the instrument s non volatile memory for convenient recall The instrument can perform a complete measurement including a comparator judgment in as little as 40ms The 3550 has standard RS 232C and Control I O Connector Interfaces with the availability of an optional GPIB Interface The Control I Os are optically isolated thus making the instrument ideal for noise immunity Feature Overview The 3550 Programmable LCR Meter offers a complete solution for a wide variety of specialized LCR measurement applications Listed below are some of the features High Speed The measurement time including data display zero correction and comparator function is approximately 40 milliseconds Extended Frequency Range The Measurement Frequency can be adjusted between 42 0Hz 5 00MHz Programmable T
76. and the measurement that will be shown on DISPLAY C 4 20 FREQ Test Frequency Select Key When FREQ is pressed the test frequency will be shown on DISPLAY C The displayed test frequency setting can be adjusted using the DOWN and UP Keys to increment or decrement the existing test frequency setting To define the test frequency value decimal point location and units refer to the SHIFT 0 Frequency Set Mode section V Show Test Voltage on DISPLAY C When the V key is pressed the test voltage will be shown on DISPLAY C Pressing either the UP or DOWN keys will adjust the test voltage The test voltage decimal point and units can be set by using the SHIFT V key sequence The Model 3550 has programmable test voltages from 0 01V 5 00V for test frequencies of 42 0HZ 1 00MHz For test frequencies above 1 00MHz the voltage can be adjusted between 0 01V and 1 00V Test voltages are adjustable in steps of 0 01V and are displayed in DISPLAY C to three significant digits When in the constant voltage mode and the UP or DOWN keys are pressed DISPLAY C will momentarily show the open circuit test voltage setting before displaying the constant voltage applied to the actual test device terminals If either the UP or DOWN key is pressed and held the voltage setting will display and the setting will either scroll up or down depending on whether the UP or DOWN key is pressed I Show Test Current on DISPLAY
77. ant current or constant voltage modes and for instructions for setting either of these modes The 3550 test voltage values may be modified if the open circuit voltage or constant voltage setting is displayed on DISPLAY C Constant voltage mode is indicated when the CV CC and V pushbuttons are illuminated The 3550 is in open circuit voltage mode when only the V key is lit The Model 3550 has programmable test voltages from 0 01V 5 00V for test frequencies of 42 0Hz 1 00MHz For test frequencies above 1 00MHz the voltage can be adjusted between 0 01V and 1 00V Test voltages are adjustable in steps of 0 01V and are displayed in DISPLAY C to three significant digits Refer to the Appendix to calculate the maximum voltage range of the constant voltage mode If DISPLAY C is set to indicate test voltage and the 3550 is in the Measurement mode the voltage amplitude can be incremented or decremented by pressing the UP and DOWN keys in the DISPLAY C panel If the UP and DOWN keys are held down the 3550 will increase the speed at which the voltage is incremented or decremented If more dramatic changes are required then the test voltage must be manually entered by accessing the 3550 s voltage set mode Pressing SHIFT 1 will cause the 3550 to enter the voltage set mode Below are instructions to set the test voltage Enter the Voltage Values The most significant digit in DISPLAY C will flash indicating that a new value must be ent
78. asurement frequency Please refer to the range charts NOTE 4 After the termination of zero offset the following indications are shown on the computer Correct OK Zero correction has executed properly Correct Error Impedance Under The open circuit impedance is less than 1kQ which is beyond correction limits Correct Error Impedance Over The short circuit impedance has exceeded 1k which is beyond correction limits 5 14 3550 LCR Meter Instruction Manual RS 232C Programming and Interfacing Table 5 4 Comparator Instructions E DAS e comparator rator co Comparator OFF OFF Absolute Value Setting Absolute Value Setting Comparator Comparator Mode cer Setting Setting Comparator CALXXXX CAHXXXX CBLXXXX CBHXXXX Absolute Value Setting Limit Values CAPXXXX CBPXXXX Setting PALXXXX Limit Values PBLXXXX PAHXXXX PBHXXXX 1 indicates a initial setting DISPLAY A LOW DISPLAY A HIGH DISPLAY B LOW DISPLAY B HIGH DISPLAY A Std Value DISPLAY B Std Value DISPLAY A Min DISPLAY B Min DISPLAY A Max DISPLAY B Max XXXX 0 0000e00 1 9999e08 Disabled Setting XXXX 0 0000e00 1 9999e08XXXX 0 0000 00 2 000e02 Disabled Setting NOTE 1 As soon as LIM is sent make sure that the system is ready to receive signals 5 15 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Data Output Format for Measurem
79. cannot be changed This means that the measurement parameters must be defined before the comparator settings For DISPLAY B there are no units for D Q or 6 Model 3550 LCR Meter Instruction Manual Operating Instructions INSTRUMENT DESCRIPTION PREPARATION FOR USE QUICK START INSTRUCTIONS OPERATING INSTRUCTIONS PROGRAMMING amp INTERFACING SERVICE INFORMATION APPENDIX Model 3550 LCR Meter Instruction Manual Operating Instructions Basic Operation The Model 3550 is a fully programmable LCR meter designed for use in many different low and high frequency applications There are ideal configurations of the 3550 for each type of measurement These configurations optimize test conditions while enhancing accuracy and measurement speed In order to maximize the effectiveness the 3550 the user should have a thorough understanding of the instrument s operation along with a basic knowledge of LCR measurement techniques This section will provide the user with the necessary information to make accurate and repeatable measurements Default Parameters Each unit is delivered from the factory with predefined settings intended for general purpose LCR measurement and ease of use Chapter III Quick Start Instructions contains information on factory default settings A CAUTION NEVER APPLY DIRECT CURRENT TO THE MEASUREMENT TERMINALS Never apply direct voltage to the measuring terminals When testing capacitors always make sure that t
80. ce value to negate it Thus for Admittance will be p 0 e 1 9 Series and Parallel Equivalent Circuit Measurements Coo Series Equivalent Circuits Parallel Equivalent Circuits IZ V I R x2 RE IY 1 Z1 G2 B2 ORO Rs ESR Z cos Rp EPR 1 Y cos8 1 G A S sy A AA A o TO RA rs of baie ed Gees IN p is the Phase Angle of Admittance q 0 Ls Cs Rs represent the L C R measurements for series equivalent circuits Lp Cp Rp represent the L C R measurements for parallel equivalent circuits 1 14 Model 3550 LCR Meter Instruction Manual Instrument Description Measurement Accuracy The impedance of the DUT is either the actual measured value or a value which is derived from the formulas below If 6 90 Z L If 8 90 gt Z 1 wC If 6 0 gt Z R Voltage Level Accuracy Limit See the Measurement Accuracy Tables located in the Appendix The tables contain formulas for calculating the Voltage Level Accuracies Model 3550 LCR Meter Instruction Manual Instrument Description 1 16 TEGAM Preparation for Use INSTRUMENT DESCRIPTION PREPARATION FOR USE QUICK START INSTRUCTIONS OPERATING INSTRUCTIONS PROGRAMMING amp INTERFACING SERVICE INFORMATION APPENDIX Model 3550 LCR Meter Instruction Manual 2 1 Model 3550 LCR Meter Instruction Manual Preparation for Use Unpacking amp Inspection Each 3550 is put th
81. cifications In order to exercise this warranty TEGAM Inc must be notified of the defective product before the expiration of the warranty period The customer shall be responsible for packaging and shipping the product to the designated TEGAM service center with shipping charges prepaid TEGAM Inc shall pay for the return of the product to the customer if the shipment is to a location within the country in which the TEGAM service center is located The customer shall be responsible for paying all shipping duties taxes and additional costs if the product is transported to any other locations Repaired products are warranted for the remaining balance of the original warranty or 90 days whichever period is longer Warranty Limitations The TEGAM Inc warranty does not apply to defects resulting from unauthorized modification or misuse of the product or any part This warranty does not apply to fuses batteries or damage to the instrument caused by battery leakage Statement of Calibration This instrument has been inspected and tested in accordance with specifications published by TEGAM Inc The accuracy and calibration of this instrument are traceable to the National Institute of Standards and Technology through equipment which is calibrated at planned intervals by comparison to certified standards maintained in the laboratories of TEGAM Inc Contact Information TEGAM INC 10 TEGAM WAY GENEVA OHIO 44041 PH 440 466 6100 FX
82. corrections where zero corrections are performed on up to three user defined frequency set points The spot frequency zero correction data is stored in the instrument s non volatile RAM and will overwrite any correction data obtained from a standard zero correction procedure A standard zero correction cannot write over data from a spot frequency zero correction The spot frequency setting must be disabled in order for the standard zero correction to be able to write over all frequency points Refer to Defining Spot Correction Frequencies for Zero Adjustments SHIFT 8 in the front panel description to learn how to enable or disable the spot frequency settings Table 4 6 Zero Correction Limits Zero Correction Correction Ss Correction Limit Stray Capacitance amp Stray Conductance CO amp GO Residual Inductance amp Residual Resistance LO amp RO If during OPEN correction the Impedance is less than 1kQ or during SHORT correction the Impedance is 1kQ or higher a buzzer will go off to warn that correction cannot be made and the system will reset without making the correction There are three methods of defining what frequencies a zero correction will be performed on They are Standard Frequency Limit and Spot Frequency Zero Correction Standard Zero Correction Refer to Section ERO Panel for instructions to perform a standard open and short circuit correction This procedure will perform a zero correction o
83. curacies di TEGAM Model 3550 LCR Meter Instruction Manual Service Information Preparation for Repair or Calibration Service Once you have verified that the cause for 3550 problem cannot be solved in the field and the need for repair and calibration service arises contact TEGAM customer service to obtain an RMA Returned Material Authorization number You can contact TEGAM customer service via the TEGAM website www tegam com or by calling 440 466 6100 OR 800 666 1010 The RMA number is unique to your instrument and will help us identify your instrument and to address the particular service request by you which is assigned to that RMA number Of even importance a detailed written description of the problem should be attached to the instrument Many times repair turnaround is unnecessarily delayed due to a lack of repair instructions or of a detailed description of the problem This description should include information such as measurement settings type of components being tested whether the problem intermittent or constant when is the problem most frequent has the test changed since the last time the instrument was used Etc Any detailed information provided to our technicians will assist them in identifying and correcting the problem in the quickest possible manner Use the Expedite Repair amp Calibration form provided on the next page Once this information is prepared and sent with the instrument and RMA number to our ser
84. cy reaches 10kHz and then it will terminate So e So e 5 26 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Sample programs for RS 232C SAMPLE2 BAS 1000 REM sample2 bas 1010 OPEN COM N81 AS 1 CLS 1020 KAN 0 1030 ON COM GOSUB RECIEVE 1040 COM ON 1050 LABEL 1060 GOSUB WAIT10 1070 IF KAN O THEN GOTO LABEL 1080 1090 GOSUB WAIT10 1110 LABEL2 1120 GOSUB WAIT10 1130 PRINT 1 PAN2 E3 O1 FA1 FB7 1140 GOSUB WAIT10 1150 FOR J 100 TO 10000 STEP 100 1160 K LEN STR J 1170 A MID STR J 2 K 1 1180 PRINT 1 FRE A TO 1190 F 1 1200 GOSUB WAIT10 1210 IF F 1 THEN GOTO 1200 1220 NEXT J 1230 PRINT end 1235 COM OFF 1240 END 1250 1260 RECIEVE 1280 IF LOC 1 lt gt 0 THEN GOTO 1300 1290 GOTO 1390 1300 GOSUB WAIT10 1320 D INPUT LOC 1 1 PRINT D 1330 D LEFT D 6 F 0 1340 IF D 3550 THEN GOTO 1360 1350 GOTO 1390 1360 PRINT 1 E3 REN O1 1380 KAN 1 GOSUB WAIT10 1390 COM ON RETURN 1400 WAIT10 1410 FOR I 0 TO 1000 NEXT I 1420 RETURN 5 27 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Sample programs for RS 232C SAMPLE2 BAS cont d Note 1 In Line 1400 WAIT10 may need be adjusted according to the speed of the computer This program was tested on a Epson PC 486 Note AU DX4 Make adjustments for your computer if Necessary The settings format and weight adjustments are
85. e 5 terminal measurement method can be used for all impedance ranges and has significant PS rea advantage over the 3 terminal measurement i method The advantage is that in addition to canceling the effects of stray capacitance and conductance between the measurement leads and close proximity conductors the residual inductance and resistance of the test lead are bypassed by placing the voltage sense points of contact directly at the DUT terminals A four terminal measurement is the same as a five terminal measurement except that the guard connection is not used GUARD Lrorce Lsense Hsense Hrorce DUT TEGAM we Model 3550 LCR Meter Instruction Manual Operating Instructions Making Accurate Measurements Test Fixture Selection Model 3510 Radial Axial Lead Adapter The Model 3510 Radial Axial Lead adapter is a SR D HA general purpose accessory used for testing Mean components with radial or axial leads Components are tested by plugging the leads directly into the LOW HIGH oc eias oc BIAS adapter sockets The Model 3510 is designed for 5 terminal measurements and is capable of measuring a wide range of impedances Model 47454 Kelvin Klips Model 47454 Kelvin Klip Leads are designed for 5 wire Kelvin measurement of all types of component styles They may be used for both low and high impedance measurements Kelvin Klips are particularly convenient for low
86. e Appendix for instructions to calculate the maximum test current available in the constant current mode for a given impedance TEGAM ie Model 3550 LCR Meter Instruction Manual Operating Instructions Front Panel Description cont d 4 12 SHIFT 2 Test Current Set Mode cont d If DISPLAY C is set to indicate test current and the 3550 is in the Measurement mode the current amplitude can be incremented or decremented by pressing the UP and DOWN keys in the DISPLAY C panel If the UP and DOWN keys are held down the instrument will increase the speed at which the current is incremented or decremented The test current can be manually entered by accessing the instrument s current set mode Below are instructions to manually set the test current Enter the Current Values Press SHIFT 2 to enter the current set mode The most significant digit in DISPLAY C will flash indicating that a new value must be entered Press a key from 0 9 to set the value of the first digit and to proceed to set the next digit value Once again press a key from 0 9 and proceed to the next digit Verify and Set the Test Current Once all three digits have been entered double check the final current value Any of the digits may be accessed and modified by pressing the CURSOR or CURSOR lt keys and entering a new value Press the ENTER key to save the current setting and to return back to the measurement mode The 3550 will
87. e and beside the display for reading convenience To change the parameters shown by DISPLAY A press the A key located in the DISPLAY A B instrument panel until the desired measurements are shown 15 BIN Display LED The BIN Display LED is a seven segment LED that displays the active sorting bin number of the Comparator When the Comparator is ON this LED displays which BIN Number the present measurement is associated with 1 through 9 are for OK products while 0 is reserved for defects such as open circuit conditions ce TEGAM Model 3550 LCR Meter Instruction Manual Operating Instructions Front Panel Description cont d Comparator State Annunciators Located in the Comparator Panel there are three total comparator state annunciators The annunciators become active when the comparator is on The comparator is turned on by pressing the ON key in the Comparator Panel See below for a summary of the annunciator functions Annunciator Functional Description DISP A LO HI Indicates when the measured value of DISPLAY A is equal to or outside of the Low or High Comparator setting DISP B LO HI Indicates when the measured value of DISPLAY B is equal to or outside of the Low or High Comparator setting TOTAL GO Indicates when the measured value of DISPLAY A and DISPLAY B are within the High and Low limits of the Low or High Comparator setting If DISPLAY A comparator is disabled then the TOTAL GO DISPLAY B determines condition
88. el 3550 Amplitude Accuracies Frequency Range Test Voltage Test Current Accurac Accurac 42 0Hz 4 00MHz 10 10mV 10 10UA 4 01MHz 5 00MHz 20 10mV 20 10UA Signal Source Impedance 500 10 Measurement Circuit Modes e Auto Manual Circuit Selection e Parallel Equivalent Circuit Mode e Series Equivalent Circuit Mode Range Measurement Range is determined by the DUT s absolute impedance Z There are 9 total ranges selectable in either AUTO or MANUAL modes Measurement parameters L C R etc are calculated from actual test voltage and current values Table 1 5 Model 3550 Measurement Ranges AUTO 4 5 6 7 8 9 100MQ 1009 10kQ 100kQ 10MQ 100m2 10MQ oe 1 8 Model 3550 LCR Meter Instruction Manual Instrument Description Performance Specifications cont d Measurement Time Open Terminal Voltage Mode When the Measurement Frequency is 10kHz no averaging the range is held constant RS 232C is OFF and the Comparator is ON the shortest measurement time is 18ms Typical Analog Measurement Times Conditions Averaging 1 range held RS 232C is OFF and Comparator ON Table 1 6 Typical Analog Measurement Times Typical Analog Measurement Time 624ms Max 221ms Max 31ms Max 18ms Max 30ms Max 25ms Max 21ms Max About the Typical Analog Measurement Time The Typical Analog Measurement Time is dependent upon the Measurement Frequency For ranges 42 0HZ 750Hz and
89. ement Data Normal Measurement Data Exponent 10 107 10 DI N E Sa El UJ N E O Co 00 E 03 E 00 E 03 E 06 Ala A ER O Dn TN O W A 10 For Equivalent Parallel Series Resistance Measurement and also Reactance Measurement For Conductance and Susceptance Measurement For Loss Coefficient Quality Measurement Phase Angle Measurement ASCII Code 5Fh LOW NO GO le E O G O E Ul HIGH NO GO Comparator OFF ASCII Code 2Dh outputted 2 times BIN BIN Number Decision Result 0 9 If Comparator is OFF then ASCII Code 2Dh 4times TOTAL GO TOTAL NO GO Comparator OFF ASCII Code 2Dh 2times Delimiter For RS 232C only Cr Lf A Dn G E N Oo uo olo oo O O O CrtLF z 00 5 1 S 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Monitor Output Format Output in Relation to Monitor Command MON For all 10 panels 0 9 the PANEL No DISPLAY A Function DISPLAY B Function CIRCUIT MODE RANGE Measurement Signal Frequency and Measurement Signal Voltage will be outputted and divided by spaces At the end whether or not there is a Limit Value will be indicated as well Output Format Sample PO_L_DO_RO_A_1 00E 03_OV_ 1 0000E 00V _ Vi _ P1_L_DO_RO_S_1 00E 03_OV_ 1 0000E 00V _ Vi _ P2_L_Q0_R1_S_1 00E 03_OV_ 1 0000E 00V _ Vi _ P3_L_Q0_R2_S_10 0E 03_OV_ 1 0000E 00V _ Vi _ P4_L_DO_R3_S_1
90. ens 4 3 Table 4 1 Relationship Between Series and Parallel Equivalent Circuits 4 3 Negative Capacitance or Inductance Readings 4 4 Zero Correction of Parasitic Impedance ccccceeecsecesseeeteeeeetseeugeennnnes 4 4 Table 4 2 Short and Open Null Connections ria 4 4 Model 3550 Programmable LCR Meter Instruction Manual C TEGAM Table of Contents IV OPERATING INSTRUCTIONS CONT D rr rr Meas iremen ID sreicctctasenticcucredamtlacesuatetacumtmantenasetiesatdacuetedmilacnnusntetads Test Lead Requirements sans 4 5 Figure 4 1a Four Wire Kelvin Measurement nn 4 5 Figure 4 1b Proper Application of Four Wire Kelvin Measurement 4 5 Measurement Signal LevelS isso aia 4 6 Series or Parallel Circuit MOdes ri 4 6 Auto range Switching Threshold iii 4 6 DISPIAFREScIUti lia i ra 4 6 AC Resistance of Coils with COres rr 4 6 Front Panel Descrip sisi iia o 4 7 Figure 4 2 Front Panel La OU Ciusiaada 4 7 a raea A e UF ECO O EA 4 8 circuit Mode Panels 4 8 FOGA P onana ie 4 8 LO P A E 4 9 Range Selection Palin a 4 9 SUING ICY seria ria 4 10 Frequency Set MOG GS icasisaccevevicsvssesentadvaviensaacennatesaseeanasiaseeisratereanninn 4 10 Test Voltage Set Mode rss ia a n 4 11 Test Current Set Mode rrrrrrrrrree iii nei 4 11 Averaging Set MOdS orense 4 12 Key LOCK MOOG sirio i ia 4 12 Comparator buzz
91. ent Settings Output Format Sample 0000 _ P1 _ 1 00 E03 Hz _ OV _ 1 0795 E00 V _ 1 0771 E 03 A 6 9 N R P_ 1 0022 1 Indexing Number 15 Circuit Mode There is no circuit mode on Z and Y alternatively is outputted Panel Number Data Temp Value A 3 Measurement Frequency Temp Value Data Exponent A 4 4 Measurement Frequency Exponent Data Unit A Measurement Frequency Unit Comparator Result A 6 Measurement Mode Status B 7 8 Test Piece Voltage Exponent________ 22 Data Temp Value B 9 TestPiece Voltage Unit 23 Data Exponent B Delimiter For the Comparator Result if the Comparator is OFF 2 _ symbols ASCII Code 2Dh will be outputted instead of a result For the Bin No if the Comparator is OFF 4 _ symbols ASCII Code 2Dh will be outputted In the Format Sample the _ denotes a space ASCII code 20h 5 16 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Table 5 5a Data Output Code Functions Output Code Content db Measurement Frequency Temp Value es e g 42 0Hz 42 0 100Hz 100 1 00kHz 1 00 Measurement Frequency Exponent e g E 00 gt Hz E 03 kHz E 06 MHz HZ Measurement Frequency Unit on _ Open Voltage Mode Fixed Voltage Mode Fixed Current Mode Test Piece Voltage Temp Value Exponent A id e g 1 00V 1 0000E 00 0 10V 100 00E 03 a la vi Test Piece Voltage
92. equency but in LCR measurement applications parallel leakage and series losses can affect the measured R and G value of the component Compensation for these errors is the reason for Series and Parallel Equivalent Circuit Measurement Modes In general parallel leakage becomes significant in highly reactive small capacitors or large inductors measurements and series resistance is more significant in low reactance large Capacitors and small inductors measurements This is the reasoning behind the use of series or parallel equivalent circuit measurement modes If the dissipation factor D is small then the difference between Series Equivalent and Parallel Equivalent Circuit Measurement Mode measurement will be small As the dissipation factor increases the difference between parallel and series equivalent measurements will increase Thus precautions must be taken when performing measurements on components with high dissipation factors TEGAM Model 3550 LCR Meter Instruction Manual Operating Instructions Making Accurate Measurements cont d Equivalent Circuits cont d Table 4 7 Illustrates the effects of leakage and series resistance on component measurements It also provides some additional formulae to illustrate the relationship that dissipation factor has on a device s impedance measurement Table 4 7 Equivalent Circuit Relationships Equivalent Dissipation Factor Circuit Conversion Formula Mode The
93. er FUNCtION i 4 13 Trigger Dela WIM iena 4 13 Comparator Functions MODE 4 14 Defining Spot Frequencies for Zero Adjustments 4 14 RS 232C Settings PO GG sica 4 15 Correction Frequency Limit Setting MOE cccccceseeeeeeeeeeeeeeeeeeeeenens 4 16 Spot Correction Mode Open Correction i 4 16 Spot Correction Mode Short Correction ri 4 16 Unknown Terminals Panels 4 17 Table 4 3 Unknown TermiNalS asirios 4 17 Comparator Limit Set Panel 0 rr 4 17 Te Ua Termales O E sian 4 17 Remote Interface Status LEDS ooccccocccccnanccnnccnnnnnn rr rr rro 4 18 Panel Selector WI a 4 18 Pome DISpla Y LED aminas iaa 4 18 Display A Parameter Selection Key coooccccccccccccccnnnnnnrrarrrnnr rr rro 4 18 DISDIO VA rara pra 4 18 BIO DISPO LED nissan 4 18 Comparator State ANNUNCIATOrs nn rr 4 19 Sample LED Trigger StatusS ccccccecccssccnseeeeceeesseeecusantteesenteeugeennrtes 4 19 Comparator ON OFF SWIC ron da pi os 4 19 Display B Parameter Selection KEY rr 4 19 BC VA POE E E O A E 4 19 d Model 3550 Programmable LCR Meter Instruction Manual TEGAM Table of Contents IV OPERATING INSTRUCTIONS CON TD Front Panel Description Conta Display C Measurement Panel rr 4 20 Table 4 4 CV CC Indicators ccc cece cece rei 4 21 DIPRFCban ic 4 21 AS siate e dieta OR penare 4 21 Rear Panel Description ii 4 22 Figure 4 3 Rear Panel La
94. ered Press a key from 0 9 to set the value of the first digit and to proceed to set the next digit value Once again press a key from 0 9 and proceed to the next digit Verify and Set the Test Voltage Once all three digits have been entered double check the final voltage value The values are changed by pressing the CURSOR or CURSOR lt keys and entering a new value Press the ENTER key to save the voltage setting and to return back to the measurement mode If a programmed voltage exceeds the instrument s sourcing capability the 3550 will beep three times and not allow the illegal value to be saved if the ENTER key is pressed SHIFT 2 Test Current Set Mode See the Appendix for detailed information concerning the measurement ranges for constant current or constant voltage modes and for instructions for setting either of these modes The 3550 test current values may be modified if the open circuit current or constant current setting is displayed on DISPLAY C Constant current mode is indicated when the CV CC and I pushbuttons are illuminated The 3550 is in open circuit current mode when only the I key is lit Programmable test currents are available from 0 01mA 99 99mA for test frequencies of 42 0Hz 1 00MHz For test frequencies above 1 00MHz the current can be adjusted between 0 01mA and 20 00mA The 3550 s test current is adjustable in 0 01mA steps and is displayed to three significant digits Refer to th
95. ermeability cores such as ferrite or iron Higher permeability will promote core losses from an AC signal causing the resistance measurement to appear larger than it would be for a DC measured resistance value Therefore an inductance measurement taken at 42Hz the lowest frequency setting of the 3550 will not necessarily reflect a DC equivalent resistance value 4 6 Model 3550 LCR Meter Instruction Manual Operating Instructions Front Panel Description Front Panel Layout oo COMPA TET u Dee A DEF LO Figure 4 2 Front Panel layout Except for the POWER switch a buzzer will be sounded whenever the function of a switch is changed 4 7 Model 3550 LCR Meter Instruction Manual Operating Instructions Front Panel Description cont d 1 POWER Switch POWER With the power switch in the down state power is applied to the 3550 and in the up state power is off When the power is turned on the remaining operational switches will retain the same status as they had before the power was previously turned off If the power is turned on while simultaneously pushing the MAN EXT Key the machine will return to its factory default settings 2 CIRCUIT MODE Panel AUTO SER PRL This panel contains the keys used for setting the Series or Parallel Equivalent Circuit Mode When verifying incoming component values it is usually good practice to consult the manufacturer for the
96. est Voltage and Current The test signal level can be adjusted between 10mV to 5 00V in the constant voltage mode and from 10uA to 99 99mA in the constant current mode Voltage amp Current Monitor The voltage at the test piece terminals and the current which is flowing through the test piece can be displayed up to 3 significant digits 1 2 Model 3550 LCR Meter Instruction Manual Instrument Description Feature Overview cont d 4 Digits Resolution DISPLAY A L C R Z IYI and DISPLAY B D Q Rs Rp G X B 0 can both display up to 4 digits GO NO GO COMPARATOR For L C R IZI IYI D Q Rs Rp G X B and 8 upper and lower limit values can be set for 9 items 10 categories for up to 9 panels of settings Series or Parallel Equivalent Circuit Mode When in Auto mode Parallel or Series Equivalent Circuit measurements are automatically determined by the active measurement range In manual range the Parallel or Series Equivalent Circuit mode are user selectable Front Panel Key Lock The Key Switch on the front panel can be set to lock the instrument settings for protection against accidental changes Automatic Zero Correction of Parasitic I mpedance Performing Open and Short Circuit Zeroing cancel the offset errors caused by Stray Capacitance Stray Conductance Residual Inductance and Residual Resistance Non Volatile Memory All measurement settings such as the Zero Correction Values Compara
97. et Display B to 6 Verify that the frequency is set to 1KHz Verify that the level is set to 1V Set the averaging to 100 as follows ore 1 o enter 7 Allow the unit thirty minutes minimum to warm up 8 Connect the Open Termination Model 42090A to the UNKNOWN BNC connectors on the 3550 9 In the ZERO Section press OPEN 10 Wait for the open correction to complete a a Note If a problem with the open correction was detected a series of beeps will be heard 11 Replace the Open Termination with the Short Termination Model 42091A 12 In the ZERO Section press SHORT 13 Wait for the short correction to complete Note If a problem with the short correction was detected a series of beeps will be heard 14 Press the Manual button B SET UP THE AGILENT 4284A Cycle power on the 4284A to obtain manufacturer s default Use the cursor keys and the soft keys to set the function to Z 0 deg Verify that the frequency is set to 1KHz Verify that the level is set to 1V Press the MEAS SETUP key Set the Hi Pw Mode to OFF Set TRIG to MAN Set the AVG to 32 Allow the unit thirty minutes minimum to warm up 0 Connect the Open Termination Model 42090A to the UNKNOWN BNC connectors on the 4284A 11 Press the MEAS SETUP key RARE Model 3550 LCR Meter Instruction Manual Service Information Model 3550 Verification Procedure cont d SET UP THE AGILENT 4284A cont d 12 Press the soft
98. ghlight the first digit of DISPLAY C and press 1 8 After selecting the threshold value input mode use the cursor key gt to highlight the bin LED and then press 1 9 to select the desired bin 9 After entering the bin number use the cursor key to highlight DISPLAY A Enter the 5 digit threshold value for DISPLAY A using keys 0 9 The setting range is from 000 00 199 99 10 Enter the 5 digit threshold value for DISPLAY B using keys 0 9 The setting range is 000 00 199 99 11 To finalize an upper limit press HIGH or press LOW to finalize a low limit setting NOTE Step 7 determines whether a high or low limit comparator setting is defined be sure that both a low and high limit have been defined To input settings for other bins return to Step 1 and repeat the process 12 To invalidate the settings for threshold values simply enter the Threshold Percent Comparator Set Mode and move the cursor to any segment in DISPLAY A or DISPLAY B Then press IGNORE to invalidate the comparator settings for that DISPLAY NOTES The comparator can only be set using panels 1 9 0 cannot be used This procedure is only for the percent comparator setting Note that the procedure for the absolute value comparator is different Make sure the comparator mode is set for Percent Mode otherwise the procedure will not work correctly After setting the limit values for the comparator the measurement pa
99. gurations its is highly recommended that the entire Operating Instructions Section of this manual be reviewed to insure proper use of this equipment This Quick Start section is designed to give the user a general instruction set for the speedy setup and measurement of impedance values where arbitrary measured values are needed and accuracy is not critical Whenever additional information is applicable a reference will be made to other parts of this manual so that the user at their discretion can decide whether or not to pursue additional information Power the Unit The power supply of the Model 3550 is designed for 50 60 Hz operations and a voltage range of 90 250 VAC It is assumed that the Preparation for Use section of this manual has been read an understood and the line voltage and fuse settings have been verified to be correct Power the unit by depressing the pushbutton located on the lower right corner of the front panel Allow at least 30 minutes for the unit to warm up and verify that the unit will be operated in its specified operating environment described on page 1 12 Instrument Settings Factory Default Settings Before performing an actual impedance measurement there are a number of test parameters which must be defined The factory default settings can be used for most general purpose measurements The 3550 is shipped from the factory with default settings as follows Table 3 1 Factory Default Settings
100. hese cursor keys allow navigation between the present BIN number 1 9 and DISPLAY A and DISPLAY B comparator value settings If a value is defined for either DISPLAY A or DISPLAY B by pressing digits 0 9 while the DISPLAY digits are blinking then the functionality of the CURSOR gt or CURSOR lt keys extends to allow navigation of the comparator value s decimal point location and selection of the DISPLAY A and DISPLAY B units of measure The Comparator s High and Low Limit Values for DISPLAY A and DISPLAY B can be set by pressing the LOW and HIGH Keys while in the measurement mode Pressing either of these keys will put the 3550 into the Comparator Limits Set Mode Once in the Comparator Limits Set Mode the BIN and values for DISPLAY A and DISPLAY B comparator settings can be defined by using the secondary functions blue text of the keys located in the CIRCUIT MODE RANGE DISPLAY C and DISPLAY A B Panels These secondary functions include O 9 D P UNIT and IGNORE commands NOTE Only panels 1 9 can have comparator limit values assigned to them 9 The GUARD Terminal This terminal is connected to the chassis of the 3550 When measuring High Impedance devices connect the device s shield to this binding post TEGAM cn Model 3550 LCR Meter Instruction Manual Operating Instructions Front Panel Description cont d Remote Interface Status LEDs SRQ LTN TLK RMT These LE
101. hey are fully discharged otherwise damage to the instrument will result NEVER MEASURE COMPONENTS IN A POWERED CIRCUIT If you are measuring components which are integrated into circuit boards always check that power is disconnected from the circuit before taking measurements When measuring transformers always verify that no induced voltage is present before making connections Measurement Tips Making Measurements that are Sensitive to Voltage and Current The measured values of many components such as core filled coils layered ceramic capacitors etc are dependent upon the applied level of test current or voltage In applications where the test signal must remain constant it is recommended that the range of the 3550 be manually set In the event that AUTO Range must be used then operation of the 3550 in the Constant Current or Constant Voltage Mode will maintain signal levels while allowing range adjustments Measuring Earth Grounded Test Pieces The L side L force L sense Of the measurement terminals is set up to be the virtual grounding point of the internal amplifiers The L side is a high impedance point with zero electrical potential These terminals cannot be directly connected to Earth Ground Measurement of devices with one lead tied to earth ground is not recommended ua TEGAM Model 3550 LCR Meter Instruction Manual Operating Instructions Measurement Tips cont d Measurement Circuit Modes When the
102. ically selected by the 3550 The L C or R reading will be shown on DISPLAY A 4 31 Model 3550 LCR Meter Instruction Manual Operating Instructions Operating the 3550 cont d Measuring Inductance L Capacitance C and Resistance R cont d Notes of Caution for Inductance L Measurement For low inductance measurements 5 Terminal Measurements are required to minimize series resistance and inductance errors Margins of error for 3 terminal measurements on low inductances will add significant error to the reading When performing measurements on small coils with a core it is possible that the measured inductance value will vary with a change in test signal level Take extra caution to match the test signal level of other machines in order to obtain matching results Keep metal objects away from the DUT when performing measurements The presence of metal objects in close proximity can affect the measured value Especially in coils with air or other low permeability cores Notes of Caution for Capacitance C Measurement For large capacitance measurements 5 Terminal Measurements are required to minimize errors caused by series resistance and inductance Margins of error for 3 terminal measurements on large capacitances will add significant error to the reading e A Always make sure that capacitors are completely discharged before connecting to the 3550 measurement terminals otherwise erroneous readings or damage to equ
103. ill be made every time the MAN EXT key on the panel is pressed 4 The controller will then designate the 3550 as the Talker and read the data 5 If you would like to issue Service Requests from the serial poll make sure that the controller reads the status bit related to the request 5 33 3550 LCR Meter Instruction Manual Programming and Interfacing The GPIB Interface Programming Examples Below is a sample program for remotely controlling the 3550 using the GPIB controller In this program measurement is carried out while changing the frequency The example here is based on the commonly used PC 9801 NEC TO Trigger without SRQ 110 ON HELP GOSUB TESTEND 120 CLS 130 HELP ON 140 ISET IFC 150 FOR I 0 TO 100000 NEXT I 160 ISET REN 170 CMD DELIM 0 180 PRINT 5 ren 190 PRINT 5 s0 e3 02 200 FOR J 100 TO 10000 STEP 100 210 K LEN STR J 220 A MID STR J 2 K 1 230 PRINT 5 fre A TO 240 LINE INPUT 5 A 250 LOCATE 0 10 PRINT A 260 NEXT J 270 GOTO 200 280 TESTEND 290 END TO Trigger with SRQ 110 ON HELP GOSUB TESTEND 120 CLS 130 HELP ON 160 ISET IFC 170 FOR I 0 TO 100000 NEXT I 180 ISET REN 190 CMD DELIM 0 200 PRINT 5 ren 210 PRINT 5 s1 e3 02 220 FOR J 100 TO 10000 STEP 100 230 K LEN STR J 240 A MID STR J 2 K 1 250 PRINT 5 fre A TO 260 FOR I 0 TO 30 NEXT I 270 POLL 5 SB 280 IF SB lt 64 THEN GOTO 260 290 LINE INPUT 5 A 300 LOCATE 0
104. ins to flash Press the DP key until the decimal point is in the desired position Then press the CURSOR key once again to set the units of measure Units are defined by pressing the UNITS key until the desired annunciator illuminates 6 After the units for the low limit DISPLAY A have been selected press the CURSOR P key The 5 digit of DISPLAY B will begin to blink indicating that a value can be entered for the high comparator limit 7 Enter the values for the DISPLAY B low comparator limit in the same manner as performed for the DISPLAY A low limit NOTE If the comparator function for DISPLAY A or DISPLAY B is not required press the IGNORE key while the display is active and the comparator for that display will be disabled A disabled display will show a in place of a numerical value 8 To set the high value limit for the comparator press the HIGH key located in the Comparator Limit Set panel The comparator high limit set mode is indicated when the HIGH LED lights Repeat steps 3 7 to set the comparator s high limit values 9 This completes setting the values for BIN 1 To set the high and low limits of the remaining BINs return to step 2 When the BIN LED is flashing select a BIN number from 1 9 by pressing the 1 9 keys and continue with the procedure NOTE The BIN functionality is expressed as LOWS lt BIN lt HIGH Model 3550 LCR Meter Instruction Manual Operating Instructions The Compara
105. ion Inputs include BCD Panel Selection and trigger inputs Outputs include A B and total Comparator outputs End of measurement BIN Busy and Error Outputs The control connector also includes pins for external power connections RS 232C Port Standard RS 232C Port GPIB Board Slot Slot provided for factory installed GPIB IEEE 488 2 option PN 3505 Model 3550 LCR Meter Instruction Manual Operating Instructions Making Accurate Measurements Connections to the Device Under Test DUT The relationship between the connections schemes and impedance Z ranges are shown in Table 5 1 It is extremely important for measurement accuracy purposes to observe appropriate connection methods for the subject test piece and measurement range Rane td 3 da 5 6 7 8 9 Impedance Mode Low Impedance High Impedance p Series Equivalent Mode Parallel Equivalent Mode sE 5 Terminal Connection gt 3 Terminal Measurement GUARD Lrorce Lsense Hsense Hrorce This measurement method is used for testing DAMMI MATA devices having high impedance In general IS NY NY NY NV components with large inductance low capacitance or high resistance fall into this category The major advantage to 3 terminal measurements is that the influence of stray capacitance and conductance between the test leads and nearby conductors becomes negligible DUT 4 or 5 Terminal Measurements Th
106. ipment could result Notes of Caution for Resistance R Measurement For low resistance measurements 5 Terminal Measurements are required to minimize series resistance and inductance errors Margins of error for 3 terminal measurements on low resistance will add significant error to the reading 4 32 Model 3550 LCR Meter Instruction Manual Operating Instructions Operating the 3550 cont d Measuring Impedance Z and Admittance Y 1 Always perform a zero correction procedure if the condition of the test leads fixture has changed This procedure must be performed before making a measurement Refer to How to Perform a Zero Correction for more details 2 Press the A key in the DISPLAY A B panel to select Z or Y 3 Press the FREQ key and adjust the frequency using the UP or DOWN keys or by manually entering a new value for test frequency See SHIFT 0 Frequency Set Mode for more details on manually setting the test frequency The measurement frequency will be displayed on DISPLAY C 4 Press the V key and adjust the measurement voltage using the UP or DOWN keys or by manually entering a new value for test frequency See SHIFT 1 Test Voltage Set Mode for more details on manually setting the test frequency The measurement voltage will be displayed on DISPLAY C 5 Press the AUTO key in the RANGE panel and verify that the AUTO LED is on This puts the 35
107. is essential for safe operation 2 4 Model 3550 LCR Meter Instruction Manual Preparation for Use Line Voltage amp Fuse Selection CAUTION DO NOT APPLY POWER TO THE INSTRUMENT BEFORE READING THIS SECTION Unless other wise specified the Model 3550 is delivered from TEGAM with its power supply set for 120V 60 Hz operation However the 3550 design allows it to operate under 100 120V 220 or 240V O 50 60 operation It is strongly recommended that the line voltage and fuse size be verified before powering the unit First determine the supply voltage that the instrument will be operating under and verify that the supply voltage does not fall outside of the allowable ranges in the table below LI NE VOLTAGE RANGE FUSE SIZE 100 120V 90 132VAC 1A 220 240V 198 250VAC 0 5A Units Made Prior to October 2008 Make sure that the proper fuse size is installed Next verify that the jumper block in the rear panel of the instrument is securely plugged into the correct position There are four positions that the block may be set to Set the jumper block to point to one of the four voltage settings You can remove the jumper block by pulling it from the jumper socket 240V 120V 220V 100V Unit set for 120VAC Operation 50 60Hz The instrument is ready for power up Proceed to Quick Start Instructions for continued operation 2 5 Model 3550 LCR Meter Instruction Manual Preparation for Use Units Made After
108. ity Phase Angle Measurement LF Divider for High and Low Limit Values ASCII Code 2Fh Percent Settings Mode Percent Settings Standard Values F Capacity Measurement MR Equivalent Resistance Reactance PEA Ss Admittance Conductance Susceptance __ Loss Coefficient Quality Phase Angle Measurement Limit Values Low Value High Value d e k KK has a setting range of 000 00 200 00 5 23 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C RS 232C Hardware and Computer Settings Set the settings as indicated below These are the default settings of the RS 232C interface 9600 bps 8bit______ Data length 8 bit Data length NONE Stop Bit Sample programs for RS 232C Explanation of SAMPLE BAS The following is a sample program establishing basic initial settings and data Display conditions for the purpose of controlling the 3550 through the RS 232C 1000 1070 are initial settings 1010 is the setting for the RS232C environment on the computer side 1030 is the setting for the break in interruption action by the computer Y Y When the power for the 3550 is turned on the 3550 sends the text signal 3550 to the computer in order to determine whether a control device exists on the computer The computer receives the signal and then sends signals to establish the necessary basic settings within the 3550 main unit If the textual signal 3550 is
109. just the frequency using the UP or DOWN keys or by manually entering a new value for test frequency See SHIFT 0 Frequency Set Mode for more details on manually setting the test frequency Frequency will be displayed on DISPLAY C 4 Press the V key and adjust the voltage using the UP or DOWN keys See SHIFT 1 Test Voltage Set Mode for more details on manually setting the test frequency The measurement voltage will be displayed on DISPLAY C 5 Press the AUTO key in the RANGE panel and verify that the AUTO LED is on This puts the 3550 in AUTO range NOTE Selecting the manual mode allows the measurement time to be reduced by eliminating the time needed for switching the ranges See RANGE Selection Panel for more details 6 Press the INT key in the TRIGGER panel and verify that the INT LED is on This will continuously trigger the 3550 and update the reading shown on DISPLAY A at a rate determined by measurement frequency delay time number of averages and the time taken to auto range If MAN EXT trigger mode is selected the reading will not be updated until a new trigger is received from the front panel or remote interface 8 Connect the DUT to the measurement terminals The CIRCUIT MODE and RANGE will be automatically selected by the 3550 The D Q Rs Rp G X B or 8 reading will be shown on DISPLAY B Notes for Measuring Reactance O On occasion a sign will
110. key labeled CORRECTION 13 Set the CABLE to Om 14 Use the cursor keys to select OPEN Press the soft key labeled ON 15 Press the soft key labeled MEAS OPEN 16 Wait for the open correction to complete Note When the measurement is complete the unit will indicate Open Measurement Complete 17 Replace the Open Termination with the Short Termination Model 42091A 18 Use the cursor keys to select SHORT Press the soft key labeled ON 19 Press the soft key labeled MEAS SHORT 20 Wait for the short correction to complete Note When the measurement is complete the unit will indicate Short Measurement Complete C Measure Standards as follows LL 2 si Select the first Resistance Standard Model 42033A connect to the UNKNOWN terminals of the 4284A Press TRIGGER when the measurement changes record the values for impedance and phase in the 4284A column Move the standard to the 3550 and press MAN EXT Wait for the reading to display and press MAN EXT again Record the values for impedance and phase in the 3550 column Repeat for each step in the 4284A table Calculate the difference in counts 3550 between the units Verify that each step is within tolerance Note The last few steps require that the leads be changed to incorporate Kelvin Klip leads to measure the higher value resistance standards Open and Short corrections must be completed using the Kelvin Klip leads 7 8 9 Set up
111. l flash indicating that a new value must be entered Press a key from 0 9 to set the value of the first digit and to proceed to set the next digit value Once again press a key from 0 9 and proceed to the next digit Set the Decimal Point Location Once values for all of the three digits have been defined the decimal point will start to blink indicating that the decimal point needs to be positioned Press the DP key and notice that the position of the decimal point will change Continue to press the DP key until the decimal point is positioned correctly Select the Frequency Units Press either the CURSOR or CURSOR lt keys repeatedly until one of the frequency units annunciators Hz kHz or MHz begins to blink This indicates that the frequency units mode is now active Press the UNIT key until the desired frequency units annunciator starts to blink Verify and Set the Frequency The user can go back and edit any of the previous settings by pressing the CURSOR gt or CURSOR lt keys to access the settings Verify that all frequency settings are correct and then press the ENTER key This will store the new frequency settings and return the instrument back to measurement mode 4 10 Model 3550 LCR Meter Instruction Manual Operating Instructions Front Panel Description cont d SHIFT 1 Test Voltage Set Mode See the Appendix for detailed information concerning the measurement ranges for const
112. n all test frequencies 42HZ 5MHz except for those designated as spot correction frequencies Frequency Limit Zero Correction For zero correction SHIFT Correction Frequency Limit Setting Mode allows the user to define the upper and lower frequency limits instead of using the default 42HZ 5MHz range Spot Frequency Zero Correction Refer to SHIFT OPEN and SHIFT SHORT sections for instructions to perform a spot frequency open and short zero correction procedure After performing the zero correction procedure perform a before and after measurement on a component with an accurately known value to confirm that a zero correction has taken place A calibrated capacitance or inductance standard would be ideal but not required for this type of verification TEGAM Model 3550 LCR Meter Instruction Manual Operating Instructions Making Accurate Measurements cont d Zero Corrections cont d NOTE The parasitic impedance of test adaptors and measurement cables differ from cable to cable Whenever a test adaptor or cable is changed make sure that zero correction is performed again Figure 4 4 Terminal Connections for Zero Correction Open Correction Short Correction G L H G L H G L H G L H ES BNC Terminals 5 Terminal Correction Kelvin Klip Correction
113. nstant Voltage Mode eee eeeeeeeeeeeeeeeeeeeaegeeeeeeeeenes A 3 To Enable the Constant Voltage Mode iii A 3 Calculating the maximum Allowable Constant Voltage Setting A 3 Setting the Constant Current Mode ssssssssssssssserersrsnsnsnnnsnsnenrnrnrnrnrnrnrnnne A 4 Calculating the maximum Allowable Constant Current Setting A 4 Basic Measurement Accuracy Tables ii A 5 Table A 1 Basic Accuracy Table i A 5 Table A 2 Basic Accuracy Table 0 01V to 0 04V A 6 Table A 3 Basic Accuracy Table 0 05V to 0 10V A 7 Table A 4 Basic Accuracy Table 0 11V to 0 20V Li A 8 Table A 5 Basic Accuracy Table 0 21V to 0 45V i A 9 Table A 6 Basic Accuracy Table 0 46V to 1 00V Lr A 10 Table A 7 Basic Accuracy Table 1 01V to 5 00V A 11 LC Impedance Calculation Chart rr A 12 EOF COUE sin os A 13 Model 3550 Programmable LCR Meter Instruction Manual g Model 3550 Programmable LCR Meter Instruction Manual Instrument Description INSTRUMENT DESCRI PTION PREPARATION FOR USE QUICK START INSTRUCTIONS OPERATING INSTRUCTIONS PROGRAMMING amp INTERFACING SERVICE INFORMATION APPENDIX Model 3550 LCR Meter Instruction Manual Instrument Description Instrument Description The Model 3550 is a high speed LCR Meter capable of measuring Inductance L Capacit
114. nt current modes sample averages frequency and other settings can affect the stability of the reading Readings that bounce out of the specification ranges can also indicate a problem with noise e Make sure that the test leads or fixtures are manufactured by TEGAM All accessories for the 3550 are specially designed to minimize the effects of external noise to the measurement signal e Verify that there are no sources of noise in close proximity to the 3550 test leads power leads or test fixture Sources of noise such as CRTs relays and other switching devices are primary causes for erratic readings Inaccurate Reading Measurements do not fall within expected or known values or accuracies e Perform Open and Closed Circuit Zero Correction procedures as instructed in this manual e Make sure that the Range is appropriate for the measurement e Verify that four or five wire Kelvin measurement leads are being used and that they are not defective e Measured component values can sometimes vary with the test voltage or current being applied Make sure that the manufacturer s recommended test settings are followed in order to duplicate measurement results Sometimes constant current or constant voltage modes may be required to stabilize readings e Verify that the test fixture or leads is appropriate for the measurement to be performed Not all fixtures and leads are designed for the entire range of 3550 test frequencies and measurement ac
115. nts section SHIFT 8 Like the Open Circuit Spot Frequency Correction Mode Short Circuit Spot Corrections have precedence over Normal Short Circuit Zero Corrections Closed circuit spot correction factors will be stored and retained in the instrument s memory and cannot be written over unless an additional spot frequency correction procedure is performed Performing a standard zero correction procedure will write over the zero adjustment factors of all test frequencies except the three user defined spot correction frequencies TEGAM Model 3550 LCR Meter Instruction Manual Operating Instructions Front Panel Description cont d UNKNOWN Terminals Panel Four BNC type terminals plus one GUARD are available for making shielded or unshielded Kelvin type measurement connections to the DUT Their designations and functions are summarized below Table 4 3 Unknown Terminals Connection Measurement Function Type Description BNC Lrorce Low Side Current Source BNC Lsense Low Side Voltage Sense BNC Hrorce High Side Current Source BNC Hsense High Side Voltage Sense Binding Post GUARD Five wire shielded measurements COMPARATOR LIMIT SET Panel CURSOR PB CURSOR 4 LOW HIGH When programming comparator settings the keys in the Comparator Limit Set Panel are used to define the DISPLAY A amp DISPLAY B Comparator values The two left most keys are the CURSOR gt or CURSOR lt keys In the comparator set mode t
116. ode a negative sign will appear in the display The negative sign in the capacitance mode indicates an inductive measurement The negative sign in the inductance mode indicates a capacitive measurement If the resonant frequency of a DUT is reached a sign will appear in the display Zero Correction of Parasitic Impedance Open Correction is for the purpose of compensating for the stray capacitance and stray conductance of cables or test fixtures Executing an Open Correction procedure on the test leads of fixture before measurement of high impedance DUTs improves measurement accuracy Short Correction compensates for the residual inductance and resistance of cables or test fixtures Performing a Short Correction procedure on cables or test fixture before measurement of low impedance DUTs improves measurement accuracy If the condition or position of a cable or test fixture changes you MUST carry out Zero Correction to compensate for the change When performing a Zero Correction keep hands and metallic objects away from the cable or fixture Table 4 2 Short and Open Null Connections Open Correction Short Correction Correct Incorrect Correct Incorrect Terminal Only 5 Terminal LE Ls Hs Insulator
117. rameters for DISPLAY A and DISPLAY B cannot be changed This means that the measurement parameters must be defined before the comparator settings For DISPLAY B there are no units for D Q or 6 NOTE The BIN functionality is expressed as LOW lt BIN lt HIGH Refer to Figures 4 5 and 4 6 for an illustration of BIN operation Model 3550 LCR Meter Instruction Manual Operating Instructions The Comparator cont d BIN Operation Comparator operation may be disabled for DISPLAY A or DISPLAY B by pressing the IGNORE key while in the high or low limit set mode A disabled DISPLAY is indicated by in place of the limit value being shown on the display Sequenced Sorting Configuration There are two common multi category BIN settings for sorting components The first is Sequenced Sorting as illustrated in Figure 4 5 In this setting the 3550 comparator will sort components based on their limit values where each BIN will define a unique range of measured values Any number of bins may be used for Sequenced Sorting If there is no matching BIN found for the component value to fall under then the component will be placed in BIN 0 Figure 4 5 Sequenced BIN Sorting LOWs lt BIN lt HIGH 4 39 Model 3550 LCR Meter Instruction Manual Operating Instructions The Comparator cont d BIN Operation cont d Nested Sorting Configuration Nested sorting is typically used for tolerance based sorting where an acceptable or
118. ration into PLC and other hardware controlled applications These terminals require a positive 5V 24V signal across the 3 8 Pins these are the anode connections for external trigger panel enable disable and the four panel BCD inputs and a common potential across pins 28 33 A constant current diode is in series with the 5 24V supply to limit the current flowing through the photo diode There is no need for a current limiting resistor for the inputs or outputs of the Control I O Connector Inputs There are 3 groups of inputs available from the Control I O Connector CONTROL PANEL EXT Pins 3 amp 28 This input works in conjunction with the front panel trigger or the rear panel External Trigger Input When this input is true current flows through pins 3 amp 28 the rear panel External Trigger is enabled If the Control PANEL EXT input is false then the triggering must be performed from the front panel External Trigger Pins 4 amp 29 Used with the CONTROL PANEL EXT input The 3550 will take measurements when the CONTROL PANEL EXT input AND External Trigger are true Panel BCD Inputs Pins 5 8 Anode and Pins 30 33 Cathode A BCD setting of 0 9 is required Settings other than 0 9 will automatically default to panel 9 The inputs of the Control I O Connector are optically Isolated The figure below is a representation of a typical input Figure 5 1 Input Schematic Fixed Current
119. rough a series of electrical and mechanical inspections before shipment to the customer Upon receipt of your instrument unpack all of the items from the shipping carton and inspect for any damage that may have occurred during transit Report any damaged items to the shipping agent Retain and use the original packing material for reshipment if necessary Upon Receipt inspect the carton for the following items Model 3550 General Purpose Programmable LCR Meter Model 3550 User s Manual CD Power Cord A Safety Information amp Precautions The following safety information applies to both operation and service personnel Safety precautions and warnings may be found throughout this instruction manual and the equipment These warnings may be in the form of a symbol or a written statement Below is a summary of these precautions Terms in This Manual CAUTION statements identify conditions or practices that could result in damage to the equipment or other property WARNING statements apply conditions or practices that could result in personal injury or loss of life Terms as Marked on Equipment CAUTI ON indicates a personal injury hazard not immediately accessible as one reads the marking or a hazard to property including the equipment itself DANGER indicates a personal injury hazard immediately accessible as one reads the marking 2 2 Model 3550 LCR Meter Instruction Manual Preparation for Use AM Safety Information amp
120. s on the front panel will return the instrument to measurement mode without affecting the comparator settings The 3550 offers a dual function comparator meaning that for each BIN there are two comparator settings that may be defined The DISPLAY A setting allows a high and low limit to be defined for L C R Z and Y measurements while DISPLAY B allows limits to be set for D Q RS RP G X B or 8 The comparator is equipped to offer an output based on the measurement results of DISPLAY A only DISPLAY B only or the combined measurement results of both DISPLAY A and DISPLAY B The comparator may be used in absolute or percent mode In the absolute mode the comparator high and low limits are defined by entering absolute value high or low limits This means that the high and low limits are entered as actual magnitudes and units of measure The percent mode requires that the high and low limits are defined in terms of a percentage of a nominal value The following sections provide instruction for setting the high and low limits in the Absolute or Percent Comparator modes During high and low limit setup if a numeric key is pressed that will create a limit value which falls outside of the measured parameter s range the instrument will disable the functionality of that key Refer to the following sections for additional information regarding the 3550 comparator functions SHIFT gt 5 Setting the comparator buzzer function SHIFT gt
121. t Values Below is an example of how the high and low limits of a BIN are set for DISPLAY A and DISPLAY B e g BIN1 CAL 1 0000e 06 CAH 1 5000E 06 BIN1 CBL 0 0100e00 CBL 0 1000e00 The order of LOW and HIGH values may be reversed Programming LOW or HIGH alone is also permitted e g BIN1 CAH 1 5000e 06 CAH 1 0000e 06 BIN1 CAL 1 0000e00 To invalidate a specific BIN s high or low limit value replace the polarity and numerical data with a series of nine dashes as expressed below e g BIN1 CAL Luton VI This command will invalidate the comparator s DISPLAY A low limit value 5 9 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Input Format cont d 5 10 Setting the Measurement Voltage The voltage setting range is from 0 01V through 5 00V in 0 01V increments However for frequencies between 1 00MHz 5 00MHz the range is limited to 0 01V 1 00V Units Volts Resolution 3 digits e g LEV1 00E0 Set the Measurement Voltage to 1 00V LEV1 52E0 Set the Measurement Voltage to 1 52V Values which are less than the 0 01V steps will be automatically truncated e g LEV1 248E00 Set the Measurement Voltage to 1 24V The 3550 will automatically reassign voltage levels if the absolute maximum levels are exceeded As shown above any voltage defined with less than 0 01V resolution will automatically be truncated to 0 01V resolution Voltage levels exceeding 5 00V will automatic
122. tandard Frequency Limit or Spot Frequency Zero Correction for both open and closed circuit conditions To perform a standard zero correction follow the instructions below a With the tips of the test leads or the adapter in an open condition push the OPEN switch DISPLAY A will show OP 57 to indicate that an open correction is being performed and 57 will indicate what step frequency the instrument is adjusting for The instrument will count down from 57 to 1 Do not touch or adjust the test leads fixture while the zero correction procedure is taking place b Once the OPEN correction is completed the unit will return to the measurement mode Connect the test leads fixture in the shorted position see Figure 4 X and press the SHORT key The instrument will execute the short circuit correction procedure During the Open or Short Circuit Zero Correction process if the Correction Value min max threshold is exceeded a warning buzzer will sound 3 times to warn that the correction could not be done If this happens lower the parasitic Impedance and re do the correction If the test leads fixture continue to fail the zero correction double check that the operating frequency range of the leads fixture have not been exceeded See Test Fixture Selection to determine whether the test frequency range of your test leads fixture have been exceeded and whether a Frequency Limit or Spot Frequency Zero Correction need
123. ter code following L through program code ERROR 1107 MEASUREMENT MODE MONITOR ERROR Input miss of character code for M0 M2 MON through program code 1108 SELECT ERROR TO DATA OUTPUT Input miss of character code for OO O3 through program code 1109 COMPARATOR RELATION SETTING ERROR Input miss of character code following P through program code 1111 SERVICE REQUEST SPOT CORRECTION ERROR Input miss of character code following 50 51 5P1 SP3 through program CO de 1112 TRIGGER ERROR Input miss of character code following TO TO through program code 1114 ZERO OFFSET ERROR Input miss of character code for Z0 Z5 through program code 1115 MEASUREMENT MODE ERROR Input miss of character code for JV JVC JCC through program code 1120 CORRECTION FREQUENCY CONTORL RELATION Input miss of character code following W through program code ERROR 1121 COMPARATOR RELATION SETTING ERROR Input miss of character code following PALXXXX through program code COMPARATOR RELATION SETTING ERROR Input miss of character code following PAHXXXX through program code 1123 COMPARATOR RELATION SETTING ERROR Input miss of character code following PBLXXXX through program code 1124 COMPARATOR RELATION SETTING ERROR Input miss of character code following PBHXXXX through program code 1128 CORRECTION FREQUENCY CONTROL RELATION Input miss of character code following WCH through program code ERROR 1129 CORRECTION FREQUENCY CONTROL RELATION Input miss of character code
124. ternal Output Signals MEASURE END ERROR DISPLAY A HI DISPLAY A LO DISPLAY A GO DISPLAY B LO DISPLAY B HI DISPLAY B GO TOTAL GO TOTAL NO GO BIN Optically Isolated Audible Buzzer Can be set to turn ON with GO or NO GO comparator state or it can be disabled Panel Presets 9 panel presets including comparator settings can be programmed into non volatile memory Front Panel Key Lock Protects accidental changing of front panel settings all panel keys except the Manual Trigger are disabled Environmental Operating Temperature 5 C 40 C 41 F 104 F lt 80 RH Non Condensing o Accuracy specifications are based on temperature conditions within 23 C 5 C 73 4 Ft9 F o For temperatures exceeding 23 C 5 C and still within the operating temperature the margin of error will be 2 times larger Power Source e Operating Voltage 100 120 220 240V AC 10 MAX250V e Power Frequency 50 60Hz e Maximum Power Usage 40VA Dimensions Width 9 84 250mm Height 5 83 148mm Depth 15 74 400mm Weight Approximately 15 4lb 7kg 1 12 Model 3550 LCR Meter Instruction Manual Instrument Description Formulas and Measurement Accuracy Parameters and Formulas Generally speaking the characteristics of circuit components can be evaluated in terms of impedance Z The 3550 LCR Meter measures the voltage and current components of the circuit in relation to the alternating signal of the measurement frequency
125. the 4285A using the same steps as for the 4284A with the exception of Hi Pw mode Measure and record each standard in the 4285 Table Calculate the difference in counts 3550 between the units 10 Verify that each step is within tolerance Note For instances where the 4284A or 4285A does not meet a 4 1 calibration ratio with the 3550 for verification purposes the allowable number of counts may need to be adjusted to reflect the added error of the Agilent meters Model 3550 LCR Meter Instruction Manual Service Information Model 3550 Verification Procedure cont d TEGAM 3550 AND AGILENT 4284A MEASUREMENTS AB AB STANDARD FREQ LEVEL PARAMETER 4284A ERROR TOL VALUE day Dc a550 ora 400m2 tk Ji z 1000A4 B 100 1400 t00mQ ik 1 8 AB 100 100 102 kK Ji A B 10ok 340 10 0 ik i Je jp A B 100 20 aoo Jik Ji z ARB IK 94 4o Jik fa A4 8 100 40029 Jik Ji Zt A B 100 22 4002 Jik Ji gt e A B 100 10 dko ak 1 Jz __ A B 10k 21 ako Jik D1 de A B 100 10 toko fik AZ _ A B ik 21 toko tk Ji 8_ A B 4100 10 100kQo ik a ARB 100 21 took tk fa AB 100 10 4o02 50 t TZ AB 100 100250 AB ioo 10 ako 50 AB 10K 26 iko 1580 i Jo AB 100 10 11008 10k Ji z A B 100 27 4009 10ok i Jo A B 100 10 iko iok fa AB 10K 27 iko 10k Ji Je AB oo 10 40029 100k fa ARB oo 85
126. the DTE side so a cross cable will be required when connecting with a personal computer or other controller unit The unit comes with a standard DB25 female port To connect it with any other DB9 device use a null modem or cross DB25 male to DB9 female adapter The adapter is inexpensive and readily available in the market The pin connection diagram for the cable is shown below di 5 E L slo jole ja jaja jo Ja AAA Secondary Transmitted d Data Transminted J PA DCC Data Carrier Detect E Ready 058 PA Roques Te sent RTS i 0 06 ADI Received Data ered 699 Lt 96 Oi Laren Ring Indici tor Ri LI 06 o MEA TR Data Termina Rex dy around Common Return alo la lala jz 7 y I vo de LI Al Ml gn Ll AM H WAH 6 3550 LCR Meter Instruction Manual Programming and Interfacing Input Format Remote In Commands To activate the RS 232C send the REN command This will change the 3550 from Panel Mode to Remote Mode Entering Program Codes Program codes will be sent from the controller unit to the 3550 as a string of ASCII characters To change the panel number PAN should be sent If a Panel Number is not relayed then the currently displayed panel will be re set by the command e g PANO FAO RO MO SO EO Notice that a space is necessary between each of the commands If a space does not precede a command then the subsequent command s will be ignored Setting Limi
127. the same even if Visual Basic 6 is used so there should be no problem using the above sample as reference Note 2 When running this program please start up the program first Then after the program is started power the 3550 5 28 3550 LCR Meter Instruction Manual Programming and Interfacing The GPIB Interface Optional General Description of GPIB Part 3505 is the optional GPIB communications board offered with the 3550 LCR Meter Installing the board onto the main unit of the 3550 LCR Meter makes remote control and data output possible After the 3505 has been installed into the 3550 it will have the capability to perform both talker and listener functions Primary Specifications of GPIB The GPIB connector is a standard 24 pin connector The pin arrangement and signal protocol conform to the IEEE 488 standard 1978 The GPIB interface functions are listed in the table below Table 5 7 GPIB Functions NAME Code FUNCTION 3672Ss3232 gt 2 gt O O OOo Source Handshake All source handshake functions Acceptor Handshake All accepting handshake functions Talker T5 Basic Talker functions Serial poll Talker deactivation using MLA Talk only function Listener deactivation using MTA 4 types of DT1 commands E0 E1 E2 E3 5 29 3550 LCR Meter Instruction Manual Programming and Interfacing The GPIB Interface Installation of the GPIB Board Option 3505 When installing this option board onto
128. ting the Percent Comparator is different Before attempting to set the Absolute Comparator limits verify that the 3550 is in the Absolute Comparator Mode After setting the limit values for the comparator the measurement parameters for DISPLAY A and DISPLAY B cannot be changed The measurement parameters must be defined before the comparator is set For DISPLAY B there are no units for D Q or 6 3 6 TEGAM Model 3550 LCR Meter Instruction Manual Quick Start Instructions Setting the Percent Comparator To set the Percent Comparator follow the procedure below The upper and lower limit for the nominal value are the same For the threshold values different values for the upper and lower limit must be set In order to proceed the 3550 must be in the percent comparator mode 1 Select the Upper or Lower Limit to Enter the Comparator Mode To input the Nominal value press the HIGH key The LOW key may also be pressed to enter the Comparator Set Mode 2 Select the Nominal Value Input Mode To input the Nominal Value press 0 when the first digit of DISPLAY C is flashing 3 Input the BIN No After selecting the Nominal Value Input Mode use the cursor gt to highlight the bin number and then press 1 9 to select the desired bin 4 Set the Nominal Value for DISPLAY A After inputting the bin number use the cursor gt to highlight DISPLAY A Enter a 5 digit Nominal Value for DISPLAY A using keys 0 9 N
129. tion cont d 4 14 SHIFT 7 Comparator Functions Mode Press SHIFT 7 to access the Comparator Functions Mode Either a flashing 0 or a 1 will appear on DISPLAY B The meaning of the numbers is as follows 0 Absolute Value Comparator Function 1 Percent Comparator Function To change the flashing digit press either 0 or 1 and press ENTER to store the new setting and return to the measurement mode SHIFT 8 Defining Spot Correction Frequencies for Zero Adjustments The spot correction frequency mode allows the user to identify up to three specific test frequencies where open and short circuit zero adjustments may be performed This feature condenses the default zero adjustment procedure by limiting the zero adjustments to user defined frequency points instead of stepping through the entire range of test frequencies 42Hz 5MHz Performing spot correction frequency zero adjustment saves time by eliminating the zero adjustment of unused test frequencies Select the Spot Frequency Number Press SHIFT 8 to enter the spot correction frequency editing mode The BIN LED will display a flashing 1 2 or 3 Press either the 1 2 or 3 keys to select the spot frequency you would like to set Entering the Spot Frequency Value Once a key is pressed DISPLAY C will display indicating that a spot frequency must be defined Press the 0 9 keys to enter the spot frequency
130. to return to measurement mode NOTE While in the Spot Correction Frequency Mode the Spot Correction Frequency high or low limit setting can be enabled or disabled This is done by pressing the IGNORE key SHIFT OPEN Spot Correction Mode Open Correction The spot correction Mode is used for making open and short circuit frequency corrections Pressing the SHIFT OPEN keys will allow an open circuit spot frequency correction to take place The open circuit correction is performed only on the three spot frequencies that are defined by pressing SHIFT 8 see Defining Spot Correction Frequencies for Zero Adjustments Note that Spot Frequency Zero Corrections have precedence over Normal Zero Corrections This means that the open and closed circuit zero correction factors for the spot frequencies will be stored and retained in the instrument s memory and will be written over unless an additional spot frequency correction procedure is performed Performing a standard zero correction procedure will write over the zero adjustment factors of all test frequencies except the three user defined spot correction frequencies SHIFT SHORT Spot Correction Mode Short Correction Pressing SHIFT SHORT initiates the Short Circuit Spot Frequency Correction process The offset adjustment affects only the three user defined Spot Correction Frequencies discussed in the Defining Spot Correction Frequencies for Zero Adjustme
131. tor Limits Panel Settings etc are stored in non volatile memory and are retained in the event of power loss Remote Operation The TEGAM Model 3550 provides standard RS 232C and I O Control Connector interfaces for remote operation There is an optional GPIB IEEE 488 interface available for purchase 1 3 Model 3550 LCR Meter Instruction Manual Instrument Description 3550 Options and Accessories Tran Tesi Adapter Model3510 LOI HIGH DE BIAS DL BLAS 2005B Chip Tweezers 5ft This four terminal tweezer set makes solid connections to chip components in manual sorting applications Capacity of jaws is el e eb This sorting fixture allows for efficient 1 5m 5 ft cable for connection to four wire measurement of leaded parts the 2150 2160 Contact tips are The test fixture features spring action replaceable P N 47422 contacts for easy insertion and removal l l of test components DIN GPIB IEEE 488 Cables o 1583 3 1 meter GPIB buss cable 1583 6 2 meter GPIB buss cable 1583 9 3 meter GPIB buss cable 47422 Chip Tweezer Replacement Kit Tweezer tips are intended to last 100 000 to 500 000 operations An optional tip replacement kit includes 47454 Kelvin Klips 12 replacement tips 2 screws and 1 Kelvin Klips allow solid four terminal KK100 Kelvin Klip Rebuild Kit Kelvin Klip replacements for construction or repair of Kelvin Klip leads 3510 Radial Lead Adapter wrench
132. tor cont d Percent Value Settings NOTE A condensed version of this procedure can be found in the Quick Start Section Set the Nominal Value 1 Make sure that panel 1 9 is selected Do this by pressing the 0 9 key until the desired panel appears on the Panel LED Press SHIFT 7 to access the Comparator Functions Mode Either a flashing O or a 1 will appear on DISPLAY B The meaning of the numbers is as follows 0 Absolute Value Comparator Function 1 Percent Comparator Function To change the flashing digit press 1 ENTER to call the percent comparator mode and return to the measurement mode 2 In the measurement mode press the LOW key in the Comparator Limit Set Panel Make sure that a panel number from 1 9 is active otherwise the comparator HIGH and LOW keys will be disabled The LOW LED will light This will cause the 4 digit if DISPLAY C to flash either a 1 or a 0 A flashing O indicates the Nominal Value Set Mode This is where the nominal value of the measured value will be entered High and low limits are calculated as a percent of this value A flashing 1 indicates the High and Low Percent Limits Set Mode The High and Low Percent Limits Mode requires a HIGH and LOW comparator setting The Nominal Value Set Mode requires only one setting Press the 0 key to set the instrument to Nominal Value Set Mode 3 Press the CURSOR once The BIN LED in the Comparator
133. tors V I CC CV Measurement Mode LED LED Open Circuit Test Voltage Mode OFF OFF Constant Voltage Mode ON Constant Current Mode OFF JON O ON Set Voltage Mode Measurements are taken using the open circuit Test Voltage The test voltage varies with current Use this mode for ordinary test objects that possess an overall impedance value with real and imaginary components Constant Voltage Measurement Mode This makes the measurement while keeping the voltage of the measurement terminals at a fixed level For example this mode can be used for testing inductors where terminal voltage will vary Using Constant Voltage mode can help stabilize a reading Constant Current Measurement Mode This makes the measurement stable by keeping the current passing through the DUT at a fixed level For example this mode can be used for testing capacitors where test current continuously varies with applied voltage 22 DISPLAY C Displays Frequency Hz kHz and MHz Open Circuit Test Voltage V Terminal Voltage Constant V and DUT Test Current Constant mA based on the settings of the DISPLAY C Measurement Panel The measurement values are displayed with 4 digit resolution Units of measure are annunciated beside the display for reading convenience 23 ENTER Key ENTER Used in the various programming modes to finalize user defined instrument settings For example the ENTER key is pressed to finalize any of the SHIFT 0 9
134. tructions Measurement Tips cont d Measurement Signal Levels Measurement signal levels are adjustable between 0 01V 5 00V It is recommended that the voltage level be kept at a high value usually 1V or larger to avoid potential stability problems associated with test frequency device impedance and noise Series or Parallel Circuit Modes The CIRCUIT MODE should always be AUTO mode unless there is a special circumstance that requires otherwise The 3550 is in the AUTO circuit mode when the pushbutton s LED is illuminated Manually setting the circuit mode should only be done in special circumstances where series or parallel measurement is necessary even if some discrepancy is known to occur Auto Range Switching Threshold When using Auto Range for measurement the relationship between the switching direction and indicated switching values are as follows When Dissipation Factor D 0 Range UP When Z 19999 counts Range DOWN When Z lt 17999 counts As the dissipation factor D increases then these threshold values will change Display Resolution The absolute impedance Z of the DUT determines the range of the 3550 All subsequent measurements will display with a resolution that is consistent with the instrument s current range setting AC Resistance of Coils with Cores In most cases the AC resistance of a coil with no core at low frequencies is the same as the DC resistance This is not the case for coils with high p
135. urement Measurement Mode Measurement Signal Voltage LEV Measurement Signal Current LEI Measurement Signal Voltage Settings Fixed Current Mode Current Settings 5 12 E ncn npn Z yj pD Re Ro G ygn gr g Measurement Item Measurement Item Measurement Item Measurement Item Measurement Item Measurement Item Measurement Item Measurement Item Measurement Item Measurement Item Measurement Item Measurement Item Measurement Item AUTO RANGE 100m Range 1QRange 10QRange 100QRange 1kQRange 10kQRange 100kQRange 1MQRange 10MQRange 100M2Range 42 0E0 5 00E6 Open Terminal Voltage Measurement Mode Fixed Voltage Measurement Mode Fixed Current Measurement Mode 0 01E0 5 00E0 0 01 99 99 3550 LCR Meter Instruction Manual Programming and Interfacing RS 232C Table 5 3b Command Summary cont d Program Service Request oY n SRQ Settings for GPIB Internal Trigger Address Command GET Start W mi O Measurement Start Up El External Trigger Start by MAN Trigger TRIGGER EXT Listener Address Designation TO Trigger Start Trigger Command Only Valid for E3 Initial Settings Clear Panel Clear All Panels Zero Offset e e Ul Offset Clear Clear Correction Value Measurement Terminal ZERO OPEN OPEN ZERO Correction Measurement ZERO SHORT Terminal SHORT ZERO Correction OPEN ZERO SPOL DPEN Spot Correction SHORT ZERO
136. us trigger mode The instrument automatically takes readings at regular intervals e MAN EXT Depressing the MAN EXT key will put the 3550 into manual one shot trigger mode which requires the MAN EXT key to be pressed for each reading 4 8 Model 3550 LCR Meter Instruction Manual Operating Instructions Front Panel Description cont d 4 ZERO Panel OPEN SHORT Performing OPEN and SHORT corrections before making an impedance reading greatly improves measurement accuracy Refer to page 4 4 Zero Correction of Parasitic Impedance for connection diagrams and other details regarding these procedures e OPEN The OPEN circuit zero correction procedure compensates for stray capacitance and conductance between test leads fixture Pressing the OPEN key initiates the open circuit zero correction procedure Make sure that the test fixture is in the open state before performing the OPEN circuit zero correction procedure e SHORT The SHORT circuit zero correction procedure compensates for residual resistance and inductance in the test leads fixture Pressing the SHORT key initiates this procedure Make sure that the test fixture is shorted before performing the SHORT circuit zero correction procedure There are three variations of zero correction procedures 1 Standard Zero Correction corrects all frequencies This process requires several minutes to step through all of the test frequencies See p 4 9 for
137. value range is defined for each BIN First the 3550 evaluates the measured value according to the defined range of BIN 1 If the measured falls within the range of BIN 1 then the component is sorted into BIN 1 If the measured value falls outside of the BIN 1 range then it is evaluated for BIN 2 If the component value falls within the BIN 2 range then it is sorted into BIN 2 If not then the 3550 proceeds the evaluation to BIN 3 and so on If the measured value does not fall within any defined ranges then the component will be sorted into BIN 0 the reject BIN Figure 4 6 Nested BIN Sorting LOWsBIN lt HIGH BIN 1 lilla aaa ae L1 1 H1 BIN 2 A L1 2 aaa 2 H1 4 40 Model 3550 LCR Meter Instruction Manual Operating Instructions The Comparator cont d Outputting the Comparator s Results There are two ways to determine the state of the comparator The LEDs of the Comparator Panel and the optically isolated open collector outputs of the Control I O Connector on the rear of the instrument Comparator values may be entered and sorted into BINs 1 9 When a measured value falls within ant of the ranges of BINs 1 9 the TOTAL GO LED will light When a measured value falls outside of the defined 1 9 BIN ranges then either the LO or HI LEDs on the Comparator Panel will illuminate depending on whether the measured value is higher or lower than the BIN settings Measured values outside of the comparator range will be sorted
138. vice department we will do our part in making sure that you receive the best possible customer service and turnaround time possible 6 5 Model 3550 LCR Meter Instruction Manual Service Information Expedite Repair amp Calibration Form Use this form to provide additional repair information and service instructions The completion of this form and including it with your instrument will expedite the processing and repair process RAT Tinstrument Mede Number Technical Contact Pone Numbers Additional Contact Info Repair Instructions LC Evaluation L Calibration Only L Repair Only L Repair amp Calibration L Z540 Extra Charge Detailed Symptoms Include information such as measurement range instrument settings type of components being tested is the problem intermittent When is the problem most frequent Has anything changed with the application since the last time the instrument was used etc 6 6 Model 3550 LCR Meter Instruction Manual Service Information Model 3550 Verification Procedure EQUIPMENT NEEDED MODEL NUMBER DESCRIPTION REQUIREMENTS Agilent 42033A 100mQ STANDARD RESISTOR Four terminal BNC male connectors 863in centers Agilent 42034A 10 STANDARD RESISTOR pour terminal dolo connectors 863in centers Agilent 42035A 100 STANDARD RESISTOR POL te ao ale connectors 863in centers Agilent 42036A 1000 STANDARD RESISTOR Four termina BNG malg connectors 863in centers
139. y 5 o T spuewwop DISEg spueuuuo p ijddy O O 3 32 QM 5 FT 30 A n Model 3550 LCR Meter Instruction Manual Quick Start Instructions Table 3 2b Control Command Summary cont d sue 5 2 ENTER Sua 5 2 ENTER SHIFT LOFE SHIFT SHORT Table 3 3 Shift Function Summary Set current for fixed current mode uN or O O 3 3 D gt o nm 3 4 Model 3550 LCR Meter Instruction Manual Quick Start Instructions Instrument Setup for Basic Measurements To perform basic measurements with the Model 3550 perform the steps below Refer to Operating Instructions for more details about specific commands or functions of the 3550 NOTE The numerals in parentheses reference the Control Command Tables on the previous pages The letters in parentheses reference the Settings Summary below Y Perform an open and closed circuit zero correction Normal correction 9 10 Frequency limit correction F or Spot correction E on the test leads or fixture Set DISPLAY A measurement parameters 1 Set DISPLAY B measurement parameters 2 Set measurement frequency 7 or 28 Set measurement mode Voltage 8 or 29 Constant Voltage A or Constant Current B Set the comparator limits and operation if necessary Absolute Comparator C or Percent Comparator D Set the trigger mode Continuous 21 or One Shot 22 trigger So e So e So e So e

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