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1. of Zes and Opens by referring to the appropriate table Table A 1 A 2 A 3 or A 4 3 Determine the maximum and minimum value by using the following equations Zas IZ meas X 1 Ay ZZ 1 Az 0 a7 Ones Ag Brin 8 a7 Ao 4 Determine the maximum and minimum value of the parameter of interest by substituting the values found in step 3 into one of the following equations There will be four combinations R zlZlcos0 R 1Z1 c050 ESR I Zi cos 8 G zcos0 1Zl X czIZlsine B sin0 lZI L X 2nf Lp 1 2xfB C 1 2 C B 2nf Q Iltmnel D 1 itan8l 5 Accuracy is found by determining the largest deviation from the measured values A 2 MEASUREMENT SIGNAL Frequency Range 40Hz 130Hz 10Hz steps 160 200 250817 300Hz 9 9kHz 100Hz steps 10 100 7 1kHz steps Accuracy 0 005 Output Impedance 1002 typ Signal Level voltage when drive terminal HCUR is open Range 10mVrms 1 100Vrms 1mV steps Accuracy 1 3 1mV for 1kHz 4 1mV for 40Hz 20kHz 5 1mV for 21kHz 100kHz Bias Voltage Internal 0 or 2VDC 5 External 0 to 35VDC A 3 COMPARATOR BINNING FUNCTIONS Number of bins 20 The comparator function can sort on the main parameters R L C or Z into bins 1 19 Also the comparator function can sort on the sub para meter into bin 0 Q D ESR G or X A 4 FRONT PANEL SET UP MEMORY Number of front panel set ups 10 Front panel set up contents All front pa
2. 100V 120V 1 24 250V slow blow 5mm x 20mm 220V 240V 1 4A 250V slow blow 5mm x 20mm 3 2 2 External Bias Fuse The external bias fuse protects the instrument from ex cessive current supplied by an external DC bias source Toreplace this fuse simply unscrew the fuse holder then replace with the following type 0 1A 250V fast blow 5mm x 20mm 3 3 CALIBRATION Model 3330 calibration requires a special computer pro gram which is included with a calibration kit along with complete calibration instructions Calibration kits are available free of charge from the factory Please call 1 800 552 1115 to obtain your calibration kit SECTION 3 Service Information 3 4 FAN FILTER CLEANING The fan filter should be cleaned at least once every three months when the unit is operated ina clean environment or at least once a month when the unit is operated in a dirty environment The fan filter element should be cleaned as follows 1 Turn off instrument power and disconnect the line cord Pry out the filter cover on the rear panel Remove the filter element Soak the filter elementin a solution of mild detergent and water until clean 5 Rinse the filter element thoroughly in clean water then allow the filter to dry thoroughly before re placement 6 When the filter has dried completely install the filter and cover PON CAUTION The instrument should not be operated without the filter in place 3 5 REPAIR
3. 3 5 1 Factory Service If the Model 3330 is still under warranty it is recom mended that the unit be returned to the factory or a Keithley authorized repair facility for calibration or re pair When returning the unit for service include the fol lowing Call the Instruments Division Repair Department at 1 800 552 1115 for a Return Material Authorization RMA number Write the RMA number and the following on the ship ping label ATTENTION REPAIR DEPARTMENT e Complete the service form at the back of this manual e Advise as to the warranty status of the instrument 3 5 2 Cover Removal The covers must be removed for repair Follow the steps below to remove the covers using Figure 3 1 as a guide 3 2 WARNING Disconnect the line cord and all other equip ment from the Model 3330 before removing the covers CAUTION A conductive coating is applied to the inner surfaces of the covers Be careful not to scratch the coating when removing covers Also be careful not to peel off the plastic film on the front panel 1 Place the instrument upside down ona soft cloth or rubber mat to avoid scratching the top cover 2 Remove the four screws that secure the bottom cover then remove the cover 3 Place the instrument right side up 4 Remove the top cover by separating it from the chas sis 3 5 3 Battery Replacement The battery which backs up setup and calibration con stants RAM should last for at least three ye
4. Output Impedance Accuracy 2 cece eee eee renee Hh Internal Bias Voltage Accuracy 60 e cece cee cee cece recente eee Hh nnn External DC Bias Voltage Range 1 ee eee eee cece cee eee eee eee eens MEASUREMENT ACCURACY TESTS Environmental Conditions lt os o o lt ooooscirscnsnrrr Recommended Equipment cece cece cece rr Recommended Standards Accuracy Resistance Measurement Accuracy Capacitance Reading Checks 2 26 2 eee eee ee ene eee ete eet tenes Inductance Reading Checks 2 2 2 2 22 cee ee eee eee ee ete eI INTRODUCTION sab BLOCK DIAGRAMS tall is CURRENT AND VOLTAGE DETECTION IMPEDANCE CALCULATION ds OSC A CURRENT TO VOLTAGE CONVERTER Line FU a A og SU ca A A Fre A A CALIBRATION 2000 REPAIR ce o o o o o o o oo op oo opon o oonon o 2 2 2 HH E 3 5 2 Cover Removal 1 A oe A A 3 5 3 Battery Replacement 3 5 4 Operation Check Procedure 855 RepairSummary 3 6 REPLACEABLE PARTS oooooocococoororrrrr eee III I m n 3 6 1 Parts List coa A A GA 3 6 2 Ordering Parts oooooooooorommorrcrrrrrrrrrr ehh APPENDICES A Specifications List of Tables SECTION 1 Performance Verification Table 1 1 Table 1 2 Table 1 3 Table 1 4 Table 1 5 Table 1 6 Table 1 7 Recommended Test Equ
5. ify that the instrument properly displays ca pacitance and inductance values 1 6 3 Resistance Standards Accuracy Resistance standards used for the measurement accuracy tests should be calibrated at certain intervals so as to en sure the accuracy of standards values Standards accu racy tolerances should be added to the stated measure ment limits 1 7 SECTION 1 Performance Verification AR 1 6 4 Resistance Measurement Accuracy Resistance accuracy measurements are made using the resistance standards listed in Table 1 3 and the test con nections shown in Figure 1 7 NOTE Be sure to connect the H and L terminals of the resistance standards to the H and L terminals respectively of the LCZ meter or inaccurate measurements may result Do not handle the standards excessively or the resulting tem perature rise may affect their values Procedure 1 Set the Model 3330 operating modes as follows A DISPLAY Z DISPLAY 0 FREQ 40Hz LEVEL 1Vrms SPEED MED RANGE AUTO Connect the OPEN resistance standard to the instru ment then press ZERO OPEN Allow the instrument to complete the zero cycle before proceeding Connect the SHORT resistance standard to the in strument then press ZERO SHORT Allow the in strument to complete the zero cycle before proceed in A Connect the 1000 resistance standard to the instru ment and allow the reading to settle Verify that the Z and 0 readings are
6. 0 15 0 25 0 50 2sIZi 10 0 37 0 25 0 20 0 15 0 20 0 32 0 50 0 80 1 5 0 22 0 15 0 10 0 07 0 12 0 20 0 30 0 40 0 80 1 lt iZi lt 2 0 52 0 35 0 30 0 20 0 25 0 50 0 70 1 0 2 0 0 335 0 22 0 20 0 122 0 155 0 305 0405 0 605 1 22 05sIZl 1 1 096 0 70 0 60 0 40 0 50 0 80 1 2 1 7 3 3 0 68 0455 0405 0 255 0 30 0 505 0705 1 05 205 025 IZI 05 2 196 1 4 1 1 0 80 1 1 1 2 1 8 2 7 5 5 1 3 0 90 0 70 0 50 0 70 0 80 115 1 65 3 0 Notes 1 For 5 C 18 C or 28 C 40 C multiply the 1Z 1 accuracy by 1 4 and the phase accuracy by 1 8 2 When measurement speed is FAST multiply the accuracies by 2 0 3 For test levels other than 0 9 1 1Vrms or 50mVrms see Accuracy Notes Table A 2 Impedance Magnitude Accuracy 760 and Phase Accuracy Level 50mVrms Speed Med or Slow Frequency Hz 40 160 Lik 5 1k Tik 90 900 5 0k 10k 20k 10Ms 1Z1 lt 20M 105 7 096 4 596 3 5 6 0 8 5 17 100 120 6 0 4 05 25 205 3 5 5 05 10 05 60 70 5Ms 1Z1 10M 5 25 3 5 22 1 7 2 7 3 5 7 0 50 60 3 0 2 0 1 3 1 05 1 6 205 4 03 30 35 2M lt IZI 5M 3 096 2 0 12 0 90 12 1 6 3 5 25 30 1 85 1 25 0 805 0 605 0 8 105 205 15 18 IMs 1Z 2M 15 1 0 0 60 0 40 0 60 0 80 1 6 12 14 0 90 0 60 0 35 0 255 0 355 0 505 0 902 705 8 05 200ks IZI 1M 0 7596 0 50 0 40 0 30 0 35 0 40 0 70 6 0 7 0 0455 0 305 0 255 0 185 0 205 0 255 0 405 3
7. 4 Example 3 Component 6804H Test Frequency 100kFiz Test Level 1V rms Temperature 18 28 C Speed Med or Slow 1 Determine the impedance magnitude accuracy of the 6804 H inductor at 100kHz by referring to Figure A 1 or by solving the following equation 2xfL 2r x 100kHz x 6804H 4270 2 Find the accuracy values corresponding to 4270 at 100kFiz on Table A 1 Record the impedance magnitude accuracy 0 7 and impedance phase accuracy 0 55 8 If the ambient temperature is 5 C 18 C or 28 C 40 C multiply the impedance magnitude accuracy by 1 4 and the impedance phase accuracy by 1 8 4 If measurement speed is set to FAST multiply the impedance magni tude accuracy by 2 0 and the impedance phase accuracy by 2 0 5 I Q 10 the inductance measurement accuracy is approximately equal to the impedance magnitude accuracy 6 If Q 10 see example 4 Example 4 Determine precision of parameters other than 1Zl and 0 at any frequency 1 First measure Z and 8 Or calculate them from other measured parameters by applying the following equations Oncas arctan Q Q 1 D 2nfL sin 6 2nfL ESR 1 2nfC sin 0 1 2nfC ESR 2xfL sin 8 2rfC G sin 6 2nfC 1 2xfL G where f frequency Fiz Cy L series equivalent circuit variables Cy Lp parallel equivalent circuit variables 2 Determine the impedance magnitude accuracy A and impedance phase accuracy
8. 6 MEASUREMENT ACCURACY TESTS Measurement accuracy tests include R resistance measurement accuracy e C capacitance reading checks e L inductance reading checks 1 6 1 Environmental Conditions All resistance measurement accuracy tests should be per formed at an ambient temperature of 23 1 C and ata relative humidity of 50 20 Capacitance and induc tance reading checks can be performed at 23 x 5 C 1 6 2 Recommended Equipment Table 1 3 lists the resistance standards capacitors induc tors and additional equipment required to perform the measurement accuracy tests The procedures for resis tance measurement accuracy verification tests are based on using these standards Listed capacitors and inductors are to be used to perform capacitance and inductance Mode 3330 Front Panel Mode 197A DMM Measure DCV Model 3325 Kelvin Test Leads Connections for External DC Bias Voltage Range Test reading checks that are not based on instrument accuracy specifications NOTE The Model 3330 makes all measurements based on the magnitude and phase of the im pedance of the DUT connected to the UN KNOWN terminals For that reason verifica tion of resistance measurement accuracy is sufficient to guarantee the accuracy of capaci tance and inductance measurements The re sistance standards values used are the same as those used for calibration Capacitance and in ductance reading checks are included to ver
9. Measurement signal tests paragraph 1 5 e Measurement accuracy and reading checks para graph 1 6 1 2 INITIAL CONDITIONS The Model 3330 should be turned on and allowed to warm up for at least one half hour before performing the verification procedures The test equipment should also be allowed to warm up for the time period recommended by the manufacturer If the instrument has been sub jected to extreme temperature or humidity allow addi tional time for internal circuits to reach normal operating temperature Typically it takes one additional hour to stabilize a unit that is 10 C 18 F outside the specified temperature range 1 3 LINE POWER Be sure to set the line voltage switch on the rear panel to the correct line voltage The instrument should be tested while operating on a line voltage within 15 of the line voltage switch setting and at a line frequency from 48Hz to 62 7 1 4 VERIFICATION LIMITS The performance verification limits stated in this section reflect only the accuracy specifications of the Model 3330 They do not include test equipment tolerance SECTION 1 Performance Verification 1 5 MEASUREMENT SIGNAL TESTS 1 5 1 Environmental Conditions All measurement signal tests should be performed at an 24 60 a ambient temperature of 23 5 C and ata relative humid 4 3095 tics of the test signal that is applied to the DUT These Ai Ed tests include 1 5 2 Recommended Test Equipmen
10. diagram 2 3 CURRENT AND VOLTAGE DETECTION The instrument drives the device under test DUT with a signal from the built in oscillator and it detects the cur rent I flowing through the DUT and the voltage Ev across the DUT The current is converted to a voltage E by the operational amplifier and the reference resistor Rr Both AC signals and Erare converted into digital data by the A D converter The microprocessor then multi plies these signals by the reference sine wave and inte grates the resultant signal digitally to obtain the voltage and current vectors magnitude and phase with respect to the reference oscillator signal Using this method it is possible to measure only the fundamental oscillator fre quency component minimizing the effects of distortion and noise 2 4 IMPEDANCE CALCULATION Impedance is calculated by dividing the voltage vector by the current vector As a result impedance is expressed as the ratio of the magnitudes and the differences in phase between the two vectors Any current to voltage conversion errors are corrected based on factors deter mined when the instrument is calibrated In addition true impedance Z Rs jX is obtained by correcting re sidual impedance Zss and floating admittance Yrr and the instrument automatically calculates main and auxil iary parameters from Rs and X SECTION 2 Principles o eration Display Figure 2 1 Measuring System Block Diagram 2 2 S
11. for 0 2 IZ 0 5 in Table A 1 0 2 171 When SPEED FAST multiply accuracy by 2 For 5 18 C or 28 40 C multiply accuracy by 2 Table A 4 Accuracy of Z and 0 for 1Z gt 20MQ LEVEL 1V rms SPEED MED or SLOW 120 500 5k IZI Accuracy Specified by the deviation S of admittance 1 Y shown 9 Accuracy 8 Accuracy for 10Ms Z i 20M in Table A 1 x IZ 20MQ When SPEED FAST multiply accuracy by 2 For 5 18 C or 28 40 C multiply accuracy by 2 Accuracy Notes 1 When a measurement is made at line frequency or at twice line frequency the measured value may deviate beyond the accuracy range due to interaction with line frequency In this case use 50Hz or 100Hz for a 60Hz line and 60Hz or 120Hz for a 50FIz line 2 Tables A 1 through A 4 show the worst case value in each impedance range A more precise value for accuracy may be obtained by interpolation 3 Inorderto determine the impedance magnitude accuracy and impedance phase accuracy at measurement signal levels LV other than 50mV or 0 9V 1 1V use one of the following equations Measurement Measured Signal Level Impedance LV Magnitude From To Zi 10mV 49mV lt 20MQand 20 20 5imV 899mV 220MQ 5imV 899mV lt 20MQ and 2020 5imV 899mV where LV Test level voltage Impedance Magnitude Accuracy A ACRES 1V v Ant le EE Es my 6 ET 0 20 192 Bp m0 Az I
12. reading Call this reading V2 6 Compute the output impedance from Vi and V2 as follows Zour 100 Vi V2 1 Q 7 Verify thattheoutputimpedance computed in step 6 is between 97Q and 1030 inclusive 13 SECTION 1 Performance Verification Model VP 7722A Distortion Analyzer Model 7051 2 Coaxial Cable cable shield Figure 1 3 Connections for Distortion Measurements Model 3330 Model 197A DMM Measure ACV to cable shield Model 7754 3 Coaxial Cable Model 1681 Test Leads R 1000 0 5 1 2 W Figure 1 4 Connections for Output Impedance Tests SECTION 1 Performance Verification mE T IN rM EE 1 5 7 Ng e 1 5 8 1 2 3 Figure 1 5 1 6 internal Bias Voltage Accuracy Connect the LCZ meter to the DMM using the Model 3324 cables see Figure 1 5 Note that connections are intended to measure the voltage between the H CUR and L CUR terminals Select the 2VDC range on the DMM Set the LCZ meter operating modes as follows LA DISPLAY C LEVEL 50mVrms RANGE AUTO BIAS INT EXT INT rear panel switch BIAS ON Verify that the DMM reading is between 1 9V and 2 1V inclusive 45 Set the LCZ meter to BIAS OFF Select the 200mVDC range on the DMM Verify that the DMM reading is OV 10mV External DC Bias Voltage Range Connect the LCZ meter to the DC power supply ca pacitor and DMM as shown in Figure 1 6 Select the DCV function and auto ranging on the D
13. 0013kQ 1 0010kQ 1 0011kQ 1 0017kQ 1 0040kQ 1 0070kQ 9 979to 9 986 to 9 990 to 9 988 to 9 980 to 9 960to 9 920to 10 021kQ 10 014kQ 10 010kQ 10 012kQ 10 020kQ 10 040kQ 10 080kQ2 99 78 to 99 85 to 99 90 to 99 82 to 99 70 to 99 40 to 98 80 to 100 22kQ 100 150kQ 100 100kQ 100 18kQ 100 30kQ2 100 60kQ 101 20kQ NOTE Limits shown do not include resistance standards tolerances All measurements to be made at 23 1 C 1 9 SECTION 1 Performance Verification Table 1 5 Resistance Measurement Accuracy Reading Limits 0 for 1Vrms Level 6 Reading Limits at Indicated Frequency Hz Value 4 120 so x s 10 20 sok 3o 0 0 12 0 x 0 08 0 0 035 0 0 10 0 0 255 05 x 0 50 0 x 0 12 0 50 085 0 0 03 0 x 0 10 0 0 25 0 x 0 50 0 0 13 0 0 095 0 0 03 0 x 0 08 0 3 0 30 0 0 60 0 0 155 0 0 10 0 0 04 0 x 0 15 0 0 40 0 3 0 80 NOTE Measurements should be made at 2234100 Table 1 6 Resistance Measurement Accuracy Reading Limits Z1 for 50Vrms Level Resistan i imi i d Zi Reading Limits at Indicated Frequency Hz Same ao xm m m s xw zx sw 99 70 to 99 80 to 99 82to 99 85to 99 80to 99 77to 99 68to 98 80to 98 40to 100 302 100 202 100 182 100 15O 100 200 100230 100 3220 101200 101 600 0 9970 to 0 9980to 0 9982to 0 9985 to 0
14. 241 00 546 00138 00 310 00169 00 302 04045 00 606 00250 00 516 07107 00 606 00080 00 332 19141 00 526 13003 00 332 19150 00 244 10870 00 080 33072 00 080 33099 00 080 33099 00 080 33510 00 FRONT PANEL SECTION NAAA WS A AAA pa The front panel has two code numbers and it is necessary to specify these two numbers when the front panel is ordered SECTION 3 Service Information APPENDIX A Model 3330 Specifications A 1 MEASUREMENT PARAMETERS Main Parameters Display A and Range L Inductance 0 1nH to 19 999kH C Capacitance 0 001pF to 199 99mF R Resistance 0 1m 2 to 19 999 1Z1 Magnitude of impedance 0 1mQ to 19 999MQ AUTO Automatically selects main parameters sub parameters and equivalent circuit Sub parameters Display B and Range Q Quality factor 0 0001 to 19999 D Dissipation factor 0 0001 to 19999 ESR Equivalent series resistance 0 1mQ to 19 999MQ G Parallel conductance 0 001pS to 199 995 X Series reactance 0 ImQ to 19 999MQ 6 Phase angle of impedance 180 00 to 179 99 V Voltage monitor RMS voltage across device 0 0mV to 1 999Vrms I Current monitor RMS current through device 0 00 Arms to 19 99mArms Measurement resolution will vary depending on frequency measure ment range and impedance phase angle Automatic Parameter Selection Phase Display A Display B 120 to 60 L Q 30 to 30 R Q 120 to 60 c D others 2 Deviation Measurem
15. 6 4 0 20ks IZI lt 200k 0 45 0 30 0 20 0 16 0 24 0 32 0 40 1 8 3 0 0 27 0 18 0 12 0 08 0 14 0 18 0 23 1 0 1 5 2ks IZI 20k 0 3796 0 2596 0 18 0 16 0 20 0 24 0 35 1 4 2 0 0 23 0 15 0 095 0 065 0 125 0 14 0 205 0 80 1 25 10s IZI 2k 0 30 0 20 0 18 0 15 0 20 0 23 0 32 1 2 1 6 0 18 0 12 0 09 0 065 0125 0 135 0 185 0 705 1 05 2s1Zi 10 0 73 0 50 0 35 0 25 0 35 0 50 0 70 3 4 4 0 0 450 0 305 0 205 0 145 0 205 0 305 0 405 205 235 1s Zi lt 2 1 5 1 0 0 60 0 50 0 60 0 80 1 1 6 0 8 0 0 9 0 605 0405 0 305 0405 0505 0 705 3 65 5 0 05siZi 1 27 1 8 1 2 1 0 12 15 1 8 10 14 1 65 1 1 0 705 0 605 0 705 0 905 115 6 05 8 55 02s1Zl 05 5 5596 3 7 2 6 2 0 2 6 2 9 3 4 21 28 3 3 2 2 1 5 12 15 1 75 205 135 165 Notes 1 For 5 C 18 C or 28 C 40 C multiply the IZ by 2 0 and the phase accuracy by 2 0 2 When measurement speed is fast multiply the accuracies by 2 0 3 Accuracy is not guaranteed in the following ranges Z gt 20MQ 0 20 4 For test levels other than 0 9 1 1Vrms or 50mVrms see Accuracy Notes Table A 3 Accuracy of Z and 0 for 0 20 LEVEL 1V rms SPEED MED or SLOW Frequency Fiz 100 200 1k 2k 10k 20k 50k 100k mole 1 a 0sIZ1 lt 02 1 796 1 5 1 0 1 3 1 4 2 0 3 0 6 0 Seana tna cana sto 0200 vi sa 1Z Accuracy reading R shown 9 Accuracy 8 Accuracy
16. 9980 to 0 9977 to 0 9968 to 0 9880 to 0 9840 to 1 0030kQ 1 0020kO 1 0018kQ 1 0015kQ 1 0020k 1 0023kQ 1 0032 1 0120k0 1 0160k02 9 963 to 9 975 to 9 982to 9 984to 9 980to 9 976to 9 965to 9 860to 9 800to 10 027kO 10 025kQ 10 018kQ 10 016kQ 10 020kQ 10 024kQ 10 035kQ 10 140kQ 10 200k2 99 55 to 9970to 99 80to 99 84to 99 76to 99 68to 99 60to 98 20to 97 00to 100 45kQ 100 30kQ 100 20kQ 100 16kQ 100 24kQ 100 32k 100 40kQ 101 80kQ 103 00kQ NOTE Limits shown do not include resistance standards tolerances All measurements to be made at 23 1 C Table 1 7 Resistance Measurement Accuracy Reading Limits 0 for 50Vrms Level 9 Reading Limits at Indicated Frequency Hz Vaue 40 312 5 m s xm x so 100K 0 0 18 0 0 12 0 0 09 050 065 0 0 12 0 0 13 090 185 0 0 705 0 1 0 0 0 18 0 0 12 050 095 000 065 0 0 12 0 0 13 05 40 185 0 0 70 0 1 0 0 0 23 0 x 0 15 00 09 0 0 06 090 125 0 0 14 0 0 205 0 0 805 1 2 0 0 27 0 0 18 05 0 12 0 0 08 0 0 14 0 0 18 0 0 23 051 05 0 1 5 NOTE Readings should be taken at 23 1 C 1 10 SECTION 1 Performance Verification 1 6 5 Capacitance Reading Checks 1 6 6 Inductance Reading Checks Capacitance reading checks are made using t
17. ECTION 2 ation iples Pri Power Supply ee dida mn IV Detector Hardware Block Diagram Figure 2 2 2 3 SECTION 2 Principles of Operation 2 5 OSCILLATOR The oscillator Figure 2 3 is a digital direct synthesis type frequency synthesizer which uses a quartz oscillator to generate the reference frequency The quartz oscillator is E to ensure that the synthesizer output remains sta e The synthesizer output which is a digital ramp signal is converted into a sine wave by the sine ROM and is then Crystal 4MHz Frequency Synthesizer Frequency Run Stop Sampling Pulse Generator Oscillator Block Diagram Figure 2 3 2 4 converted into an analog signal by the D A converter Since the D A converter output includes harmonics of the desired fundamental frequency the D A converter output signal is routed through the low pass filter to ob tain a pure sine wave The output of the oscillator is fed to the HCUR terminal to be applied to the DUT along with the DC bias voltage The equivalent output impedance is approximately 1000 H CUR To DUT Bias Voltage SECTION 2 Principles of Operation 2 6 CURRENT TO VOLTAGE CONVERTER The signal current from the DUT is converted to a voltage before measurement a function performed by the cur rent to voltage converter Figure 2 4 The converter is mad
18. I 296 IZ accuracy Accuracy of Z and 0 1 year 18 28 C For 0 22 lt lt 20MQ and 0 9 1 1V test level see Table A 1 For 0 20 1Z1 20MQ and 50mV test level see Table A 2 For 1Z 1 lt 0 20 and 1V test level see Table A 3 For 1Z gt 20MQ and 1V test level see Table A 4 when properly zero corrected and using Model 3323A test fixture Table A 1 Impedance Magnitude Accuracy and Phase Accuracy 9 Test Level 0 9 1 1Vrms Speed Med or Slow Frequency Hz p yet Lik 5 1k lik 5 0k 10k 20k p 10M lt IZ 20M 4 596 3 0 2 0 1 0 2 0 35 4 0 ES E 2 255 1 5 1 0 0 80 1 5 205 3 05 ES E 5Ms IZI 10M 2296 1 596 1 0 0 5 1 0 1 8 2 0 7 0 10 13 0 90 0 60 0 40 0 60 1 19 1 35 4 05 6 05 5 1 10 0 75 0 5 0 3 0 5 0 9 1 0 3 5 5 0 0 68 0 45 0 305 0 205 0 305 0 605 0 605 205 3 0 IMS 1Z1 2M 0 54 0 36 0 30 0 20 0 30 0 40 0 50 1 6 3 0 0 335 0 22 0 15 0 10 0 15 0205 0 305 105 205 200k s IZ 1M 0 37 0 25 0 20 0 15 0 20 0 27 0 35 1 0 2 0 0 225 0 15 0 125 0095 0 125 0 165 0 205 0 605 12 20ks 200k 0 2296 0 1596 0 12 0 10 0 18 0 25 0 30 0 60 1 2 0 15 0 10 0 06 0 045 0 085 0 155 0 205 0 405 0 85 2k lt IZI 20k 0 21 0 14 0 12 0 10 0 12 0 15 0 20 0 40 0 80 0 13 0 09 0 05 0 05 0 06 0 085 0 125 0 305 0 605 10s IZI 2k 0 20 0 13 0 11 0 10 0 11 0 13 0 17 0 40 0 70 0 12 0 08 0 05 0 03 0 08 0 10
19. MM Set LCZ meter operating modes as follows A DISPLAY C FREQ 120Hz LEVEL 50mVrms BIAS INT EXT EXT rear panel switch BIAS OFF Setthe unit to RANGE 2 as follows A Measure the value of the 104F capacitor in the RANGE AUTO mode DC BIAS OFF B Verify that the Model 3330 is properly measur ing the capacitor C Press the RANGE AUTO key and check that the AUTO LED goes off The unit is now set to RANGE 2 Check the voltage across the cap citor with BIAS OFF and with BIAS ON and a 35V external bias volt tting on the DC power supply 35V must be available with BIAS ON Disconnect the DMM and measure the capacitor value Verify that the reading is stable to within 32 digits of the center value four digits of span WARNING Hazardous voltage gt 30V will be used in the following steps Do not touch the capacitor until the testis complete and the capacitoris discharged Set the unit to BLAS OFF and set the external DC power supply voltage to 40V Set the LCZ meter to BIAS ON and verify that the BIAS fuse does not blow Set the unit to BIAS OFF then turn off and discon nect the external DC power supply Model 197A DMM Measure DCV Model 3324 4 Termina Test Leads Connections for DC Bias Accuracy Tests Red HCUR Black LCUR Black LCUR SECTION 1 Performance Verification DC Power Supply 0 40V Mode 7051 2 Coaxial Cable Figure 1 6 1
20. Model 3330 LCZ Meter Service Manual Uh DISPLAY Contains Servicing Information KEITHLEY WARRANTY Keithley Instruments Inc warrants this product to be free from defects in material and workmanship for a period of 1 year from date of shipment Keithley Instruments Inc warrants the following items for 90 days from the date of shipment probes cables rechargeable batter ies diskettes and documentation During the warranty period we will at our option either repair or replace any product that proves to be defective To exercise this warranty write or call your local Keithley representative or contact Keithley headquarters in Cleveland Ohio You will be given prompt assistance and return instructions Send the product transportation prepaid to the indicated service facility Repairs will be made and the product returned transportation prepaid Repaired or replaced products are warranted for the balance of the original warranty period or at least 90 days LIMITATION OF WARRANTY This warranty does not apply to defects resulting from product modification without Keithley s express written consent or misuse of any product or part This warranty also does not apply to fuses software non rechargeable batteries damage from battery leak age or problems arising from normal wear or failure to follow instructi
21. T double the accuracy 3 Accuracy is not guaranteed in the following ranges Z gt 20M2 Z lt 22 Level 50mV rms Speed Medium or Slow Figure A 3 Accuracy Diagram Analyzer 2 5 Battery Replacement 3 2 Block Diagram 2 1 Calibration 3 1 Capacitance Reading Checks 1 11 Cover Removal 3 2 Current and Voltage Detection 2 1 Current to Voltage Converter 2 5 E Environmental Conditions 1 2 1 7 External Bias Fuse 2 1 External DC Bias Voltage Range 1 6 F Factory Service 3 2 Fan Filter Cleaning 3 2 Frequency Accuracy 1 3 Fuse Replacement 3 1 Impedance Calculation 2 1 Inductance Reading Checks 1 11 Initial Conditions 1 1 Internal Bias Voltage Accuracy 1 6 L Line Fuse Line Power 1 1 Measurement Accuracy Tests 1 7 Measurement Signal Destination Measurement Signal Level Accuracy 1 3 Measurement Signal Tests 1 2 Operation Check Procedure 3 4 Index Ordering Parts 3 5 Oscillator 2 4 Output Impedance Accuracy 14 Parts List 3 5 Performance Verification 1 1 Principles of Operation 2 1 R Recommended Equipment i 7 Recommended Test Equipment 1 2 Repair 3 2 Repair Summary 3 4 Resistance Standards Accuracy S Service Information 3 1 V Verification Limits 1 1 SERVICE FORM Model No ______________ Serial No Date Name and Telephone No Company List all c
22. ables or jump ers installing or removing switching cards or making internal changes such as installing or removing jumpers Do not touch any object that could provide a current path to the common side of the circuit under test or power line earth ground Always make measurements with dry hands while standing on a dry insulated surface capable of withstanding the voltage being measured The instrument and accessories must be used in accordance with its specifications and operating instructions or the safety of the equip ment may be impaired Do not exceed the maximum signal levels of the instruments and ac cessories as defined in the specifications and operating informa tion and as shown on the instrument or test fixture panels or switching card When fuses are used in a product replace with same type and rating for continued protection against fire hazard Chassis connections must only be used as shield connections for measuring circuits NOT as safety earth ground connections If you are using a test fixture keep the lid closed while power is ap plied to the device under test Safe operation requires the use of a lid interlock Ifa screw is present connect it to safety earth ground using the wire recommended in the user documentation The A symbol on an instrument indicates that the user should re fer to the operating instructions located in the manual The A symbol on an instrument shows that it can source or
23. ano 38 20146 Milano 39 2 48303008 Fax 39 2 48302274 NETHERLANDS Keithley Instruments BV Avelingen West 49 4202 MS Gorinchem 31 0 183 635333 Fax 31 0 183 630821 SWITZERLAND Keithley Instruments SA Kriesbachstrasse 4 8600 D bendorf 41 1 8219444 Fax 41 1 8203081 TAIWAN Keithley Instruments Taiwan 1FL 85 Po Ai Street Hsinchu Taiwan 886 3 572 9077 Fax 886 3 572 9031 1 99 Model 3330 167 Meter Service Manual 1993 Keithley Instruments Inc Test Instrumentation Group All rights reserved Cleveland Ohio U S A First Printing February 1993 Document Number 3330 902 01 Rev A All Keithley product names are trademarks or registered trademarks of Keithley Instruments Inc Other brand and product names are trademarks or registered trademarks of their respective holders The following safety precautions should be observed before using this product and any associated instrumentation Although some in struments and accessories would normally be used with non haz ardous voltages there are situations where hazardous conditions may be present This product is intended for use by qualified personnel who recog nize shock hazards and are familiar with the safety precautions re quired to avoid possible injury Read the operating information carefully before using the product The types of product users are Responsible body 5 the individual or group responsible for the use and maintenance o
24. ars If you no tice the instrument no longer stores setups the battery should be replaced A calibration error during the self test may also indicate a discharged battery Follow the steps below to replace the battery CAUTION Many parts on the internal circuit boards are static sensitive To avoid possible damage perform any repair operations only ata prop erly grounded work station and use only grounded tip soldering irons and anti static de soldering tools Replacement of lithium batteries is normally a safe proce dure as long as the following safety precautions are fol lowed WARNING The precautions below must be followed to avoid possible personal injury 1 Wear safety glasses or goggles when working with lithium batteries 2 Do not short the battery terminals to gether 3 Do not incinerate or otherwise expose lithium batteries to excessive heat gt 60 C SECTION 3 Service Information 1 Remove Screws 2 Remove Bottom Cover Figure3 1 Cover Removal 4 Keep lithium batteries away from all 2 liquids 3 5 Do not attempt to charge lithium batter ies 6 Observe proper polarity when install 4 ing lithium batteries Calibration constants are stored in battery backed up RAM Model 3330 calibration will be required if the battery becomes fully dis charged or if you remove the battery o N from the Model 3330 3 Remove Top Cover Remove the top and bottom covers Note th
25. e positions of the various cables connected to the circuit board then disconnect all cables from the board Remove the screws that secure the circuit board to the chassis Remove the control board NOTE 6 Unsolder the battery terminals and remove the bat tery Install a new battery taking care to observe polarity Install the circuit board and connect all cables to the board Replace the covers 1 Disconnect the line cord and all other instruments 10 Calibrate the instrument after replacing the battery see paragraph 3 3 SECTION 3 Service Information 3 5 4 Operation Check Procedure 3 4 Connect the instrument to an appropriate power source using the supplied power cord Press in on the front panel POWER switch to turn on the power Verify thatthe instrument displays the ROM version number on the A DISPLAY area The instrument will then perform internal circuit checks and enter the self calibration mode During self calibration CAL is displayed on theLA DIS PLAY and a decrementing number is displayed on the B DISPLAY section The number on the DISPLAY section decre ments the self calibration cycle ends when this number reaches zero 6 If an error occurs an appropriate message will be displayed see Table 3 2 Turn the instrument off for three seconds then turn power back on to see if the error clears the error persists and cannot be clea
26. e that users are prevented access and or insulated from every connection point In some cases connections must be exposed to potential human contact Product users in these circumstances must be trained to protect themselves from the risk of electric shock If the circuit is capable of operating at or above 1000 volts no conductive part of the circuit may be exposed As described in the International Electrotechnical Commission IEC Standard IEC 664 digital multimeter measuring circuits e g Keithley Models 175A 199 2000 2001 2002 and 2010 are Installation Category IL All other instruments signal terminals are Installation Category I and must not be connected to mains Do not connect switching cards directly to unlimited power circuits They are intended to be used with impedance limited sources NEVER connect switching cards directly to AC mains When con necting sources to switching cards install protective devices to lim it fault current and voltage to the card Before operating an instrument make sure the line cord is connect ed to a properly grounded power receptacle Inspect the connecting cables test leads and jumpers for possible wear cracks or breaks before each use For maximum safety do not touch the product test cables or any other instruments while power is applied to the circuit under test ALWAYS remove power from the entire test system and discharge any capacitors before connecting or disconnecting c
27. e up of a high gain operational amplifier and a refer ence resistor Rr which forms the feedback loop for the op amp Since the operational amplifier has very high gain its in verting input is at virtual ground potential Conse quently the current flowing through Y can be neglected and the signal current I has the same magnitude as the current flowing through Rx As a result the voltage across Rr which is the same as the output voltage Vour is simply IRr Note that the value of can be changed ac cording to the value of the DUT being measured in order to increase the dynamic range of the instrument At higher frequencies the gain of the operational ampli fier decreases and the value of the floating admittance which is made up primarily of capacitance at higher fre Current to Voltage Converter Figure 2 4 quencies increases Consequently the current to ground increases substantially increasing the measurement er ror The error term is proportional to the product of Rr and the square of the frequency 2 7 ANALYZER To eliminate the effects of a common mode signal the voltages Ev and En across the DUT and are amplified by a differential amplifier and then routed to the A D converter through a signal conditioner consisting of am plifiers and a low pass filter Figure 2 5 The low pass filter attenuates any unwanted frequency components to prevent possible measurement errors The variable ga
28. ent A Deviation of main parameter range of deviation is at least 100 of the measurement range A deviation display of main parameter display range 199 99 Note Deviation and deviation of sub parameters cannot be dis played Execution Times Measurement Time TEEE 488 FAST 65msec typ MED 155msec typ SLOW 485msec typ Note 1kQ impedance 1kHz frequency and one shot trigger Specifications subject to change without notice Autoranging Time Approximately equal to measurement time Stabilization Time After Range Change 0 2 4 05 Stabilization Time After Frequency Change 0 15 4 05 Bias Stabilization Time 4 0 015C s where C capacitance of DUT in pF Equivalent Circuits AUTO Automatic selection SER Series PAR Parallel Automatic Equivalent Circuit Selection Equivalent Display A Display B Circuit L C Ror ESR or X Series Lor C IZI lt 1kQ Q 8 orl Series R 020 Q D 6 V orl Series Q D 8 Vori Series L C R or IZ G Parallel LorC Zl 1kQ Q D 8 Vorl Parallel R 8 lt 0 Q D 8 or Parallel Displayed Resolution 4 1 2 digits 19999 max counts D Q maximum resolution 0 0001 0 resolution 0 015 V resolution 0 1mV I resolution 14A when reference resistance is 1000 0 11 A when reference resistance is 1kQ 0 011 A when reference resistance is 10kQ or 50kQ Note Reference resistance is measurement range dependent Accuracy of V I Accuracy of V
29. f equipment for ensuring that the equipment is operated within its specifications and operating limits and for en suring that operators are adequately trained Operators use the product for its intended function They must be trained in electrical safety procedures and proper use of the instru ment They must be protected from electric shock and contact with hazardous live circuits Maintenance personnel perform routine procedures on the product to keep it operating for example setting the line voltage or replac ing consumable materials Maintenance procedures are described in the manual The procedures explicitly state if the operator may per form them Otherwise they should be performed only by service personnel Service personnel are trained to work on live circuits and perform safe installations and repairs of products Only properly trained ser vice personnel may perform installation and service procedures Exercise extreme caution when a shock hazard is present Lethal voltage may be present on cable connector jacks or test fixtures The American National Standards Institute ANSI states that a shock hazard exists when voltage levels greater than 30V RMS 42 4V peak or60VDC are present A goodsafety practiceistoexpect that hazardous voltage is present in any unknown cir cuit before measuring Safety Precautions Users of this product must be protected from electric shock at all times The responsible body must ensur
30. he 100pF Inductance reading checks are made using the 1004H and 0 01 capacitors summarized in Table 1 3 and 10mH inductors summarized in Table 1 3 NOTE l The capacitance reading check procedure is not based on instrument accuracy specifica tions and is included only to show that the in strument properly displays capacitance read ings As noted previously verification of re sistance measurement accuracy is sufficient to verify capacitance measurement accuracy NOTE The inductance reading check procedure is not based on instrument accuracy specifica tions and is included only to show that the in strument properly displays inductance read ings As noted previously verification of re sistance measurement accuracy is sufficient to verify inductance measurement accuracy Procedure Procedure 1 Set the Model 3330 operating modes as follows 1 Set the Model 3330 operating modes as follows CA DISPLAY C A DISPLAY L DISPLAY D DISPLAY Q CKT MODE SER CKT MODE SER FREQ 1kHz FREQ 1kHz LEVEL 1Vrms LEVEL 1Vrms SPEED MED SPEED MED RANGE AUTO RANGE AUTO 2 Connect the Model 3323 Direct Test Fixture to the 2 Connect the Model 3323 Direct Test Fixture to the unit Figure 1 8 but do not connect the capacitor to unit Figure 1 8 but do not connect the inductor to the test fixture at this time the test fixture at this time 3 Short the test fixture terminals by connecting a bare 3 Short the test fixture termi
31. ignal Distortion 1 Connect the H CUR jack of the LCZ meter to the dis tortion meter as shown in Figure 1 3 Be sure to con nect the G terminal of the LCZ meter to the cable shield as shown 2 Set the LCZ meter operating modes as follows LEVEL 1Vrms BLAS OFF FREQ 1kHz 3 Verify that the distortion reading is 0 3 or less as summarized in Table 1 2 Table 1 2 Distortion Measurement Summary Distortion Reading Change the frequency to 100kHz Verify that the distortion reading is 0 5 or less Set the Model 3330 frequency to 200Hz as follows A Press the SETUP key to enter the auxiliary setup mode The LED above the FREQ HZ marking blinks and the unit displays the present fre quency in the B DISPLAY area B Enter a frequency of 200 7 OQ e 1 4 C Press the ENTER EXIT key twice to complete 200Hz programming 7 Verify that the distortion reading is 0 370 or less 1 5 6 Output Impedance Accuracy 1 Connectthe LCZ meter to the DMM switch and re sistor as shown in Figure 1 4 Be sure that the G ter minal of the LCZ meter is connected to the cable shield and that the resistor and switch are connected as shown 2 Select the 2VAC range on the DMM 3 Setthe LCZ meter operating modes as follows FREQ 1kHz LEVEL 1Vrms BIAS OFF 4 Set the switch to the open position then note the DMM reading Call this reading Vi 5 Set the switch to the closed position then note the DMM
32. in amplifiers AMP x1 and AMP x8 are used to increase the resolution of the 16 bit A D con verter when the voltage and current are small The gain phase characteristics are measured at power on and in zero measurement OPEN and SHORT modes and the compensating factors are applied to subsequent imped ance measurements to ensure that amplifier characteris tics do not affect measurement accuracy Vour Rr Device under test Reference resistor 100 1kQ 10kQ 50kQ Floating admittance Operational amplifier SECTION 2 Principles o eration fc 500kHz 30kHz Figure2 5 Analyzer 2 6 SECTION 3 Service Information 3 1 INTRODUCTION This section contains information on fuse replacement instrument repair and replacement parts for the Model 3330 3 2 FUSE REPLACEMENT The following paragraphs discuss replacement of the line fuse and external bias fuse WARNING Disconnect the line cord and all other equip ment from the instrument before replacing fuses CAUTION Using the wrong fuse type may result in in strument damage 3 2 1 Line Fuse The line fuse which is located on the rear panel protects the power line input from excessive current To replace the fuse first unplug the line cord then pry out the fuse holder from the bottom of the line power receptacle Re place the fuse only with the type recommended in Table 3 1 Table 3 1 Recommended Line Fuses Line Voltage Description
33. ipment for Measurement Signal Distortion Measurement Summary oooooooooncrrconarana rr Recommended Equipment for Measurement Accuracy Resistance Measurement Accuracy Reading Limits 1Z1 for 1Vrms Level Resistance Measurement Accuracy Reading Limits 0 for 1Vrms Level Resistance Measurement Accuracy Reading Limits Z for 50Vrms Level Resistance Measurement Accuracy Reading Limits 0 for 50Vrms Level SECTION 3 Service Information Table 3 1 Table 3 2 Table 3 3 Table 3 4 Table 3 5 Recommended Line Fuse Self calibration Errors 96 9 9 9 9 o o 20 0b 0 9 9 v oo o Operation Check Problem Summary oooooooroccorraranr I Measurement Signal Problem Summary Model 3330 Replaceable Parts n PPP UU List of Illustrations SECTION 1 Performance Verification Figure 1 1 Connections for Measurement and Signal Level Accuracy en 6n Figure 1 2 Connections for Frequency Accuracy Measurement es ee ee reece n nn Figure 1 3 Connections for Distortion Measurements sere ee eee nnn nnn Figure 1 4 Connections for Output Impedance Tests sees Figure 1 5 Connections for DC Bias Accuracy Tests 22 2 eee ee ence eee ey Figure 1 6 Connections for E
34. le 3 5 summarizes available Model 3330 replacement parts and Figure 3 2 shows the location of mechanical parts Replace main board NP 10420 Perform calibration replace main board if calibration is not effective Replace main board Replace main board Replace main board Replace main board 3 6 2 Ordering Parts To order a part or to obtain information on replacement parts contact your Keithley representative or the factory When ordering parts include the following information Instrument model number Instrument serial number Keithley part number Part description 3 5 SECTION 3 Service Information 3 6 Table 3 5 Model 3330 Replaceable Parts Front panel Power switch Front Button Switch holder 1 BNC connector BNC137 Ground terminal REAR PANEL SECTION Rear panel Noise filter inlet Ground terminal Voltage selection switch Fan DC12V 60 x 60mm Air filter Flat head screw M3x40mm Grommet small BNC connector BNC137 Fuse holder Hex stud L 25 CHASSIS SECTION Chassis Hex stud L 8 Power switch Switch holder 2 Flexible wire Power transformer D 432768 BOARD ASSEMBLY NP 10457 MAIN NP 21101A 1 KEY NP 21101A 2 BIAS A D These two boards combined into one set 400 12310 00 506 00516 00 332 19133 00 359 03554 00 526 12996 00 310 00169 00 330 05346 00 400 12328 00 240 03212 00 330 05389 00 332 50057 00 300 00785 00 459 00205 00 600 01
35. mea sure 1000 volts or more including the combined effect of normal and common mode voltages Use standard safety precautions to avoid personal contact with these voltages The WARNING heading in a manual explains dangers that might result in personal injury or death Always read the associated infor mation very carefully before performing the indicated procedure The CAUTION heading in a manual explains hazards that could damage the instrument Such damage may invalidate the warranty Instrumentation and accessories shall not be connected to humans Before performing any maintenance disconnect the line cord and all test cables To maintain protection from electric shock and fire replacement components in mains circuits including the power transformer test leads and input jacks must be purchased from Keithley Instru ments Standard fuses with applicable national safety approvals may be used if the rating and type are the same Other components that are not safety related may be purchased from other suppliers as long as they are equivalent to the original component Note that se lected parts should be purchased only through Keithley Instruments to maintain accuracy and functionality of the product If you are unsure about the applicability of a replacement component call a Keithley Instruments office for information To clean the instrument use a damp cloth or mild water based cleaner Clean the exterior of the instrument o
36. mpedance Magnitude Accuracy from Table A 1 Aq Impedance Phase Accuracy 5 from Table A 1 A Impedance Magnitude Accuracy from Table A 2 A Impedance Phase Accuracy from Table A 2 Az Impedance Magnitude Accuracy from Table A 3 B Impedance Magnitude offset mQ from Table A 3 A Impedance Magnitude Accuracy from Table A Impedance Phase Accuracy from Table A 4 A Impedance Magnitude Accuracy for 5imV lt LV lt 899mV and 020 Impedance Phase Accuracy 5 A 50mV Ae N LV 1V Ant edn Cz 1 1 x 0 6 4 s u ree Nest ten tees s tasses rrena ae wy s s 10MQ 1MQ 10kQ 1kQ 100kQ 100 MP 100 120 Inductance L 50k 100k 5k 10k 20k 2k 100 200 500 ik 40 Frequency f Hz impedance Z the impedance magnitude of an particular frequency For example a 1H inductor at 10kHz and a 1uF capacitor at 1kHz are shown on the diagram rmine Use this chart to dete inductor or capacitor at a Notes 1H O 10kHz 63 1pF 1kHz 1602 Diagram Figure A L Conversi Examples of Determining Accuracy Example i Component 33kQ resistor Test Frequency 10kHz Test Level 1V rms Temperature 18 28 C Speed Med or Slow 1 Find the accuracy values corresponding to 33kQ and 10kHz on Table A 1 Record the im
37. nals by connecting a bare wire between them Press ZERO SHORT and allow wire between them Press ZERO SHORT and allow the instrument to complete the zero cycle Remove the instrument to complete the zero cycle Remove the shorting wire after the zero cycle is completed the shorting wire after the zero cycle is completed 4 Press ZERO OPEN and allow the instrument to 4 Press ZERO OPEN and allow the instrument to complete the zero cycle complete the zero cycle 5 Connect the 100pF 1 capacitor to the test fixture 5 Connect the 1004H 1 inductor to the test fixture _ terminals and verify that the capacitance reading is terminals and verify that the inductance reading is within 2 of 100pF 98pF to 102pF within 2 of 1004H 98H to 1024H 6 Connect the 0 01 1 capacitor to the test fixture 6 Connect the 10mH 1 inductor to the test fixture terminals and verify that the capacitance reading is within 2 of 10nF 9 8nF to 10 2nF terminals and verify that the inductance reading is within 2 of 10mH 9 8mH to 10 2mH 1 11 SECTION 1 P Verification Capacitor or inductor Model 3323 Test Fixture itance and Inductance Reading Checks 1 12 SECTION 2 Principles of Operation 2 1 INTRODUCTION This section discusses basic circuit operating principles for the Model 3330 LCZ Meter 2 2 BLOCK DIAGRAMS Figure 2 1 shows a block diagram of the measuring sys tem and Figure 2 2 is a hardware block
38. nel parameters except bias con trol i Battery life At least 3 years if storage temperture is less than 40 C A 5 HANDLER INTERFACE Connector 36 pin Centronics type Cinch 57 30360 Output signals BIN 0 11 Bin judgment signals A_NG Main parameter failure B_NG Sub parameter failure STROBE Judgment completion pulse pulse width gt 1 5ms BUSY Measurement in progress flag Output characteristics Type TTL negative logic Maximum TTL load 10 standard TTL Maximum output current 48mA sink output voltage lt 1V Input signals TRIG Measurement start trigger pulse width 2100ps LOCK Panel operation prohibited Input characteristics Low level input voltage 1 5 to 0 8V High level input voltage 2 4V to 30V TRIG 3 5V to 30V LOCK Low level input current Approximation TRIG 0 33mA LOCK 3mA Handler Interface Ground isolated from chassis ground Max voltage from chassis 42VDC Beeper two functions dip switch selectable Beeper on off Enables beeper function Beeper Mode 1 Beep only for NO GO 2 4KHz beep for GO and 2kHz beep for NO GO Note GOrefers to comparator bins 1 19 and NO GOrefers tocompara tor bin 0 A 6 IEEE 488 BUS IMPLEMENTATION Multiline Commands DCL SDC GET GTL UNT UNL SPE SPD Uniline Commands IFC REN EOI SRQ ATN Interface Functions SH1 AH1 T5 L4 SR1 RL2 PPO DC1 DT1 CO A 7 GENERAL Line Voltage 100 120 220 or 240 10 VAC external switch selectable E
39. nly Do not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument Rev 1 99 HOW TO USE THIS MANUAL pied m verify that the instrument meets SECTION 1 Performance Verification Describes basic operating principles for the various circuits in S E CTI O N 2 theM l inci i e Model 3330 Principles of Operation Covers fuse replacement calibration and repair theinstru S E CTI O N 3 Service Information WARNING The information in this manual is intended for qualified serv ice personnel who can recognize possible shock hazards Do not attempt these procedures unless you are qualified to do so Table of Contents SECTION 1 Performance Verification 1 1 12 1 3 1 4 15 15 1 1 5 2 1 5 9 1 5 4 1 5 5 1 5 6 1 5 7 1 5 8 1 6 1 6 1 1 6 2 1 6 3 1 6 4 1 6 5 1 6 6 SECTION 2 Principles of Operation 2 1 22 23 24 2 5 2 6 27 9 1 9 2 9 2 1 3 2 2 3 3 34 3 5 3 5 1 INTRODUCTION essesssessesercserssesssosesesoesssoesereoserssecesseeeseo MEASUREMENT SIGNAL TESTS oo oooccoocccrcorccrnccrrarorcrcocanaranaoooc Environmental Conditions oooocosormosrrrsrronnrnnsrcarorrrrrarr cr Recommended Test Equipment 2 6 eee eee cee eee rr Frequency Accuracy cece eee ehe Measurement Signal Level Accuracy 1 2 cece celle Measurement Signal Distortion lt ooooocorororrrrrrrrorrrr Hh
40. nvironment Operating 0 40 C 10 90 RH non condensing Storage 10 50 C 10 80 RH non condensing Dimensions Weight 132 5mm high x 216mm wide x 350mm deep 5 Y in x 8 Y in x 13 Y in Net weigth 3 7kg 8 1 Ibs instrument only excluding accessories Warm up 30 minutes Front Panel Connectors 4 BNC connectors and a five way binding post Rear Panel Connectors Handler Interface External Bias BNC IEEE Connector Floating Display Two 4 Y digit displays for main and sub parameters Trigger Mode Automatic continuous and manual Trigger Delay Time 0 199 99s Calibration Cycle 1 year 10MQ x 1MQ 3 v 100kQ SS SS 10kQ x S 1kQ Y S 1000 10 12 Capacitance C inductance L 40 100 200 500 tk 5k 10k 20k 50k 100k Impedance Z Frequency f Hz Note 1 For 5 C 18 C or 28 C 40 C multiply the Z accuracy by 1 4 and the phase accuracy by 1 8 2 When measurement speed is FAST double the accuracy Level 0 9V 1 1V rms Speed Medium or Slow Figure A 2 Accuracy Diagram SS 10MQ o X 1MQ x 2 S AN 5 100kQ 2 lt A NN S 10kQ 2 S 1kQ 2 4 ZA X S 1000 2 mM 10 2 o e x AN 10 Capacitance C inductance L 40 100 200 500 tk 2k 5k 10k 20k 50k 100k Impedance Z Frequency f Hz Note 1 For 5 C 18 C or 28 C 40 C multiply the Z accuracy by 2 0 and the phase accuracy by 2 0 2 When measurement speed is FAS
41. ons THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES NEITHER KEITHLEY INSTRUMENTS INC NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRU MENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS INC HAS BEEN ADVISED IN ADVANCE OF THE POS SIBILITY OF SUCH DAMAGES SUCH EXCLUDED DAMAGES SHALL INCLUDE BUT ARE NOT LIMITED TO COSTS OF REMOVAL AND INSTALLATION LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON OR DAM AGE TO PROPERTY KEITHLEY Keithley Instruments Inc 28775 Aurora Road Cleveland OH 44139 440 248 0400 Fax 440 248 6168 http www keithley com CHINA Keithley Instruments China Yuan Chen Xin Building Room 705 12 Yumin Road Dewai Madian Beijing 100029 8610 62022886 Fax 8610 62022892 FRANCE Keithley Instruments SARL BP 60 3 All e des Garays 91122 Palaiseau C dex 33 1 60 11 51 55 5 Fax 33 1 60 11 77 26 GERMANY Keithley Instruments GmbH Landsberger Strasse 65 9 D 82110 Germering Munich 49 89 8493070 Fax 49 89 84930759 GREAT BRITAIN Keithley Instruments Ltd The Minster 58 Portman Road Reading Berkshire England RG3 LEA e 44 1189 596469 Fax 44 1189 575666 ITALY Keithley Instruments SRL Viale S Gimign
42. ontrol settings describe problem and check boxes that apply to problem O Intermittent Analog output follows display Particular range or function bad specify IEEE failure ClObvious problem on power up Batteries and fuses are OK CJFront panel operational Al ranges or functions are bad Checked all cables Display or output circle one ODrifts Unable to zero Unstable CI Will not read applied input Overload CiCalibration only CiCertificate of Calibration required Data required attach any additional sheets as necessary Show a block diagram of your measurement system including all instruments connected whether power is turned on or not Also describe signal source Where is the measurement being performed factory controlled laboratory out of doors etc What power line voltage is used Ambient Temperature Relative humidity Other Any additional information If special modifications have been made by the user please describe Be sure to include your name and phone number on this service form Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44139 Printed in the U S A
43. pedance magnitude accuracy 0 25 and imped ance phase accuracy 0 155 2 If the ambient temperature is 5 C 18 C or 28 C 40 C multiply the impedance magnitude accuracy by 1 4 and the impedance phase accuracy by 1 8 3 If measurement speed is set to FAST multiply the impedance magni tude accuracy by 2 0 and the impedance phase accuracy by 2 0 4 Resistance accuracy is approximately equal to the impedance magni tude accuracy if Q s 0 1 5 If Q gt 0 1 see example 4 Example 2 Component 10 capacitor Test Frequency 1kHz Test Level 50mV Temperature 18 28 C Speed Med or Slow 1 Determine the impedance of the 10pF capacitor at 1kHz by referring to Figure A 1 or by solving the following equation l1 1 1 2 ae 2x x 1kHz x 104F 2 Find the accuracy values corresponding to 16Q at 1kHz on Table 2 Record the impedance magnitude accuracy 0 15 and impedance phase accuracy 0 063 3 If the ambient temperature is 5 C 18 C or 28 C 40 C multiply the impedance magnitude accuracy by 1 4 and the impedance phase accuracy by 1 8 4 If measurement speed is set to FAST multiply the impedance magni tude accuracy by 2 0 and the impedance phase accuracy by 2 0 5 If D 0 1 the accuracy of the capacitance measurement accuracy C is related to the impedance magnitude accuracy Z by the following equation Cs In this example Z 0 1 and C 0 1001 6 If D gt 0 1 see example
44. red the instrument requires the indicated serv ice 3 5 5 Repair Summary Table 3 3 summarizes the most likely source of the prob lem for the various operation check item problems see paragraph3 5 4 Table3 4 summarizes actions to take for various measurement signal problems See Section 1 for measurement signal measurements Table 32 Self calibration Errors Recommended Acton Err Err Circuit abnormality Repair instrument EEEEE 22222 Invalid cal constants Calibrate instrument 44444 77777 RAM error Check RAM EEEEE 99999 ROM error Check ROM Table 3 3 Operation Check Problem Summary Non resettable error except IEEEE 22222 Resettable error IEEEE 22222 error Calibration error Front panel keys and or LEDs do not function Handler interface does not function Replace RAM ROM or circuit board NP 10420 Reset error and proceed with operation Repeat test calibrate unit if problem persists Replace main board NP 10420 Replace front panel circuit board Replace handler interface board NP 21127 If the calibration error persists the internal battery may require replacement SECTION 3 Service Information Table 3 4 Measurement Signal Problem Summary Frequency accuracy Measurement signal level Measurement signal distortion Output impedance accuracy Internal DC bias accuracy External DC bias voltage range 3 6 REPLACEABLE PARTS 3 6 1 Parts List Tab
45. rmance Verification nal of the LCZ meter to the shield of the connecting cable as shown 1 Connect the Model3330 H CUR jack to input A of the 2 Select the ACV function and auto ranging on the 1 5 3 Frequency Accuracy Figure 1 1 counter timer as shown in Figure 1 1 Be sure to connect the G terminal of the LCZ meter to the shield of the connecting cable as shown Set the LCZ meter operating modes as follows FREQ 1kHz LEVEL 1Vrms BIAS OFF Set the counter timer to measure frequency on in put A Verify that the counter reading is between 0 999950kHz and 1 000050kHz 50ppm 1 5 4 Measurement Signal Level Accuracy 1 Connect the Model 3330 H CUR jack to the DMM as shown in Figure 1 2 Be sure to connect the G termi Model 3330 DMM Set the LCZ meter operating modes as follows LEVEL 1Vrms FREO 1kHz BIAS OFF Verify that the DMM reading is between the limits for 1Vrms 1kHz operation as follows 0 97Vrms to 1 03 Vrms 3 0 Change the LEVEL to 50mVrms and verify the sig nal level accuracy for 1kHz 50mVrms operation is as follows 47 5mVrms to 52 5mVrms 5 0 Model PM 6654C Timer Counter Model 7051 2 Coaxial Cable to cable shield Connections for Measurement and Signal Level Accuracy 1 3 SECTION 1 P nce Verification Model 197A DMM Pomona 1468 BNC Banana Model 7051 2 Coaxial Cable Connect G terminal to cable shield 1 5 5 Measurement S
46. t e Frequency accuracy Table 1 1 lists the test equipment required to perform the Measurement signal level accuracy measurement signal tests The procedures for measure e Measurement signal distortion ment signal verification tests are based on using this ex Output impedance accuracy actequipment Alternate equipment may be used as long Internal DC bias voltage accuracy as that equipment has specifications at least good as External DC bias voltage range those stated in Table 1 1 Table 1 1 Recommended Test Equipment for Measurement Signal Tests ETA TOO DMM AC volts DC volts 5 1 2 digits Timer counter TCXO option Audio analyzer DC power supply Test leads BNC interconnect cable BNC to alligator cable Test leads Test leads BNC banana adapter Capacitor Resistor Switch 1 2 2VDC range 0 011 of rdg 2 counts 2VAC range 0 35 of rdg 100 counts 0 01Hz 120MHz time base aging 1 x 107 month 10 110 0 01 accuracy at full scale 1dB har monic distortion accuracy from 10Hz to 15 99kHz 0 40VDC adjustable 5mVp p ripple Two leads terminated with banana plug and clip on probes 50Q coaxial cable RG 58C male BNC connectors 2ft 0 6m Coaxial cable male BNC connector two alligator clips 4 terminal alligator clip test lead set Kelvin clip test lead set Female BNC connector to double banana plug 104F 100VDC 1909 30 550 1 zn SECTION 1 Perfo
47. within the limits shown in Table 1 4 and Table 1 5 respectively Repeatsteps 4and 5 fortheremaining standards val ues listed in the table 1kQ through 100kQ and ver ify that all readings are within the required limits Repeat steps 2 through 6 for the remaining frequen cies listed in the tables Change the LEVEL to 50mVrms then repeat steps 2 through 7 for the frequencies summarized in Table 1 6 and Table 1 7 Table 1 3 Recommended Equipment for Measurement Accuracy Tests Manutan Modal Resistance standards Hewlett Packard HP 16074A OPEN SHORT 1000 1 10kO 100kQ Calibration Standard Capacitors User supplied Inductors User supplied 100pF 0 01 1 1004H 10mH 1 Test Fixture Keithley 3323 Fixture used to connect capacitors and inductors 1 8 SECTION 1 P nce Verification Model 3330 Top Cover Lc Lp Hp Hc MONO Standard Resistance Note Connect L and H terminals properly as shown Figure 1 7 Connections for Resistance Accuracy Measurements Table 1 4 Resistance Measurement Accuracy Reading Limits 1Z 1 for 1Vrms Level IZ Reading Limits at Indicated Frequency Hz Vale 40 12 s xx s 10k zoe sok 100K 99 80 to 99 87 to 99 90 to 99 89 to 99 87to 99 83to 99 60 to 99 30 to 100 200 100 130 100 10 2 100 1192 100 17Q 100 400 100 700 0 9980 to 0 9987 to 0 9990 to 0 9989 to 0 9983 to 0 9960 to 0 9930 to 1 0020kQ 1
48. xternal DC Bias Voltage Range Test Figure 1 7 Connections for Resistance Accuracy Measurements leen n Figure 1 8 Connections for Capacitance and Inductance Reading Checks ees SECTION 2 Principles of Operation Figure 2 1 Measuring System Block Diagram Figure 2 2 Hardware Block Diagram ooooooororrrrrrrre n nnn Figure 2 3 Oscillator Block Diagram 5 5 11 Figure 2 4 Current to Voltage Converter 6 0 eee ence eH Figure 2 5 Analyzer a see SECTION 3 Service Information Figure 3 1 Rs ds 3 3 Figure 3 2 Model 3330 Exploded View oooooooooororrrrr rr 3 7 SECTION 1 Performance Verification 1 1 INTRODUCTION The procedures outlined in this section may be used to verify that the Model 3330 LCZ Meteris operating within limits stated in the specifications Performance verifica tion may be done when the instrumentis first received to ensure that no damage or misadjustment has occurred during shipment Verification may also be performed whenever there is a question of instrument accuracy NOTE If instrument performance is outside the specified range and the instrument is still un der warranty contact your Keithley represen tative or the factory to determine the correct course of action Performance verification falls into the following two gen eral categories

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