Memoq MR-720 Manuel d'utilisateur

User’s Manual Model SR715 Model SR720 LCR Meters 1290-D Reamwood Avenue Sunnyvale, California 94089 Phone: (408) 744-9040 •

SR715/720 LCR METER viiiOPTIONS GPIB / Handler Interface Option 01 provides both an IEEE-488 interface and a Handler interface. IEE

SR715/720 PARTS LIST 7-3REF. SRS PART# VALUE DESCRIPTIONC 1217 5-00225-548 .1U AXIAL Capacitor, Ceramic, 50V,+80/-20% Z5U AXC 1218 5-00225-548 .1U

SR715/720 PARTS LIST 7-4REF. SRS PART# VALUE DESCRIPTIONC 1277 5-00225-548 .1U AXIAL Capacitor, Ceramic, 50V,+80/-20% Z5U AXC 1278 5-00225-548 .1U

SR715/720 PARTS LIST 7-5REF. SRS PART# VALUE DESCRIPTIOND 1313 3-00547-310 RED COATED LED, Coated RectangularD 1314 3-00547-310 RED COATED LED, Coa

SR715/720 PARTS LIST 7-6REF. SRS PART# VALUE DESCRIPTIONJ 604B 0-00321-035 BLACK BANANA JACKJ 901 1-00139-130 28 PIN DIL Connector, MaleJ 902 1-001

SR715/720 PARTS LIST 7-7REF. SRS PART# VALUE DESCRIPTIONR 118 4-00662-407 2.00M Resistor, Metal Film, 1/8W, 1%, 50PPMR 119 4-00130-407 1.00K Resist

SR715/720 PARTS LIST 7-8REF. SRS PART# VALUE DESCRIPTIONR 610 4-00079-401 4.7K Resistor, Carbon Film, 1/4W, 5%R 611 4-00142-407 100K Resistor, Meta

SR715/720 PARTS LIST 7-9REF. SRS PART# VALUE DESCRIPTIONU 107 3-00423-340 5534 Integrated Circuit (Thru-hole Pkg)U 108 3-00383-340 LM6321 Integrate

SR715/720 PARTS LIST 7-10REF. SRS PART# VALUE DESCRIPTIONU 901 3-00401-340 74HCT244 Integrated Circuit (Thru-hole Pkg)U 902 3-00401-340 74HCT244 In

SR715/720 PARTS LIST 7-11REF. SRS PART# VALUE DESCRIPTIONZ 0 0-00231-043 #4 SHOULDER Washer, nylonZ 0 0-00241-021 4-40X3/16PP Screw, Panhead Philli

SR715/720 PARTS LIST 7-12Miscellaneous and Chassis Assembly Parts ListREF.SRS PART# VALUE DESCRIPTIONU 802 3-00449-342 27C256-120 EPROM/PROM, I.C.Z

SR715/720 LCR METER ixBASIC OPERATION This section is designed to help the user begin making measurements with the SR715/720 LCR meter and

SR715/720 LCR METER xSeries and Parallel circuit models Rs in capacitors is often referred to as ESR or equivalent series resistance. It

SR715/720 LCR METER xiTypical measurement setups The table below lists suggested test conditions for various types of components. This is b

SR715/720 LCR METER xiiHow the SR715/720 Works The SR715/720 measures the impedance of a component by measuring the voltage across the part

SR715/720 LCR METER xiiiCOMMAND LIST VARIABLES i,j Integers x Real Number MEASUREMENT SETUP $STL(?) {i} Set (query) settling time to bet

SR715/720 LCR METER xiv*STB? {i} Query Serial Poll status byte. If i is included, only bit i is queried. SENA(?) {i} Set (query) LCR Statu

SR715/720 LCR METER xv

GETTING STARTED 1-1SR715/720 LCR METERSThis section of the manual provides an overall viewof the SR715/720. For detailed operatinginformation on s

GETTING STARTED 1-2DISPLAYThe LED display shows measured values, enteredparameters, instrument status, and usermessages. There are two 5-digit LED

GETTING STARTED 1-3KEYPADThe keypad is used to select measurementconditions and to enter values. LEDs indicate theactualmeasurement conditions.PAR

GETTING STARTED 1-4mode. The range can also be entered with thenumeric keys in the entry display.EQUIV CIRCUITThe [Equiv Circuit] key selects betw

GETTING STARTED 1-5FIXTUREA versatile test fixture is provided with theSR715/720 that provides a 4 wire Kelvinconnection to most types of leaded d

GETTING STARTED 1-6REAR PANELPOWER ENTRY MODULEThe Power Entry Module is used to fuse the linepower, select the input voltage, and filter highfreq

OPERATION 2-1DISPLAYThe SR715/720 displays both major and minor parameters simultaneously. In addition to the parameterselection, the display type m

OPERATION 2-2SERIES and PARALLEL EQUIVALENT CIRCUITSAny non-ideal component can be represented as a resistive component either in series or in paral

OPERATION 2-3ENTRY The ENTRY display allows entry of nominal values, measurement conditions, andcalibration data. To view this display, press the [D

OPERATION 2-4TEST CONDITIONSDEFAULT CONDITIONSIf the back space key [<-] is held down while turning on the unit, it will be set to the default se

OPERATION 2-5been programmed with the vernier setting, none of the primary drive voltage LEDs will be on. To return to theprimary output levels, pre

OPERATION 2-6capacitors (test voltage = 0.5 Vrms). In these cases, use the vernier setting toobtain the exact voltage required. In general use the l

TABLE OF CONTENTS iGENERAL INFORMATION Safety and Preparation for Use iii Specifications v Basic Operation viii Passive Devices vii

OPERATION 2-7autorange to range 0 (or range 1 for 100 kHz) and then autorange back to theappropriate range when a part is inserted in the fixture. R

OPERATION 2-8Range Change Points When AutorangingRanging To Lower Impedances Ranging To Higher ImpedancesRange ChangeImpledance Range Change Impleda

OPERATION 2-9EXTERNAL BIAS The SR715/720 has rear panel connections to allow an external bias voltage ofup to +40VDC to be applied across the DUT. T

OPERATION 2-10where Ts = settling time, Ni = number of test frequency cycles used in themeasurement, f = test frequency, Tdi = deintegration time, T

OPERATION 2-11whenever the unit is triggered. In the triggered mode the unit will make a singlemeasurement per trigger.STORE and RECALL[Store] and

OPERATION 2-12CONNECTING A DEVICEThe SR715/720 has a built in Kelvin fixture for measuring radial leaded components and adapters formeasuring axial

OPERATION 2-13COMPONENT DIMENSIONS The radial fixture can accommodate components with a lead spacing from0.2" (5mm) up to 3.8" (96.5mm) wi

OPERATION 2-14KELVIN CLIPS Kelvin Clips provide a simple means to measure large or unusually sized parts.They can connect to any component lead up t

OPERATION 2-15marked. The side with the silkscreen is the positive side.) To make ameasurement, pick up the component with the SMD tweezers so that

OPERATION 2-16OPEN and SHORT CIRCUIT OR NULL CALIBRATIONCompensation of stray impedances is performed by open and short circuit or fixture null cali

TABLE OF CONTENTS iiTESTS and CALIBRATION Functional Tests 5-1 Front Panel Test 5-1 Self Test 5-2 Output Voltage 5-2 Resistance Mea

OPERATION 2-17separation as it will be when making measurements. Again keep hands or otherobjects away from the clips while performing null cal. See

OPERATION 2-18BINNINGThe SR715/720 has built in features to aid in component sorting. This is especially useful for productiontesting, incoming insp

OPERATION 2-19Binning data can be entered manually using the [Bin#], [Nominal] and [Limit] keys, or over the RS232 oroptional GPIB interface. A bin

OPERATION 2-20VALUES FORFAIL BINS (8 & 9) To set the QDR limit value, select bin 8 (using the [Bin#] [8] [ENTER] keys) andpress the [Nominal] ke

OPERATION 2-21Binning WorksheetDate: __________Nominal value of component: ______________________Tolerance to be sorted to: ______________________

OPERATION 2-22Option 01: GPIB/Handler InterfaceGPIB Interface:Detailed information on the GPIB interface and programming examples are available in t

OPERATION 2-23Mechanical Description:The handler interface is part of the Option 01 GPIB/Handler board and is accessed via a 25 pin maleconnector on

ACCURACY 3-1DETAILED ACCURACY SPECIFICATION GUIDECONDITIONSThe following conditions must be met for the unit to meet its accuracy specifications1)

ACCURACY 3-2IMPEDANCE ACCURACYAccuracy of Z = ± [A x Ki x Kv + (Kh + Kl) x 100] %A = Basic Impedance Accuracy Factorfrom graph on next page.If the

ACCURACY 3-3

SR715/720 LCR METER iiiSAFETY AND PREPARATION FOR USE WARNING Dangerous voltages, capable of causing injury or death, are present in this i

ACCURACY 3-4R + Q ACCURACYAccuracy of R = ± [A x Ki x Kv + (Kh + Kl) x 100] %A = Basic Resistance Accuracy Factorfrom graph.For |Q| > 0.1, multi

ACCURACY 3-5L + Q ACCURACYAccuracy of L = ± [A x Ki x Kv + (Kh + Kl) x 100] %A = Basic Inductance Accuracy Factorfrom graph.For Q < 10, multipl

ACCURACY 3-6C + D ACCURACYAccuracy of C = ± [A x Ki x Kv + (Kh + Kl) x 100] %A = Basic Capacitance AccuracyFactor from graph.For D > 0.1, multip

ACCURACY 3-7C + R ACCURACYAccuracy of C = ± [A x Ki x Kv + (Kh + Kl) x 100] %A = Basic Capacitance AccuracyFactor from graph on page 4-6.If the un

ACCURACY 3-8Accuracy when Holding a non-optimal RangeWhen a component is measured outside of its nominal range (in range hold), the accuracy of the

REMOTE PROGRAMMING 4-1INTRODUCTIONThe SR715 / SR720 LCR meters may be remotelyprogrammed via either the RS232 or GPIB (IEEE-488) interfaces. Any c

REMOTE PROGRAMMING 4-2Similarly, the SR715/720 has a 256 characteroutput buffer to store output until the hostcomputer is ready to receive it. If t

REMOTE PROGRAMMING 4-3DETAILED COMMAND LISTThe four letter mnemonic in each command sequence specifies the command. The rest of the sequenceconsis

REMOTE PROGRAMMING 4-4RNGH(?) {i} The RNGH command disables (i=0) and enables (i=1) range hold. Whenrange hold is disabled the SR715/720 will autor

REMOTE PROGRAMMING 4-5Byte Character Meaning2 0,1,2,3 The range on which this measurement was taken.3 R,L,C The major parameter type if querying t

SR715/720 LCR METER iv

REMOTE PROGRAMMING 4-6Concise Binary The same format as verbose binary except that the status byte (byte 3) is notsent.Note: When using the RS232 i

REMOTE PROGRAMMING 4-7SR715/720 will use the nominal value from the next lowest numbered bin witha non-zero nominal value (several bins can have t

REMOTE PROGRAMMING 4-8enable registers maintain their values at power down. This allows theproduction of a service request at power up.*SRE (?) {i}

REMOTE PROGRAMMING 4-98 Instrumentation Amp Error. The input instrumentation amplifier failedits test.9 Output Error. The output impedance selec

REMOTE PROGRAMMING 4-10STATUS BYTE DEFINITIONSThe SR715/720 reports on its status by means of three status bytes: the serial poll byte, the standar

REMOTE PROGRAMMING 4-11STANDARD EVENT bit nameusageSTATUS BYTE0 OPC Set by the OPC command when all measurements arecomplete1 unused2 Query Error

REMOTE PROGRAMMING 4-12EXAMPLE PROGRAM 1Using Microsoft C with the National Instruments GPIB card on the IBM PC.To successfully interface the SR715

REMOTE PROGRAMMING 4-13exit (0);}ibwrt (lcr, "*RST", 4L); /* reset LCR meter */ ibwrt (lcr, "MMOD1;PMOD3;FREQ0", 17L);

REMOTE PROGRAMMING 4-14EXAMPLE PROGRAM 2Using Microsoft C with the Capital Equipment Corp. (CEC) GPIB card on the IBM PC.To successfully interface

REMOTE PROGRAMMING 4-15 TxGpib (sr720,"OUTF2"); /* verbose binary output */TxGpib (sr720,"STRT;*WAI;XALL?"); /* trigger a meas

SR715/720 LCR METER v

REMOTE PROGRAMMING 4-16char cmd[25];sprintf (cmd, "UNT UNL MLA TALK %d", address); /* make the talk command string */transmit (&statu

REMOTE PROGRAMMING 4-17EXAMPLE PROGRAM 3Using Microsoft C with the Capital Equipment Corp. (CEC) GPIB card on the IBM PC.To successfully interface

REMOTE PROGRAMMING 4-18void main(void){ int i, b; double rmeas, q; char string[80]; InitGpib(); /* init GPIB controller */TxGpib (lcr, "*RST

REMOTE PROGRAMMING 4-19printf ("bin01234567QDR Fail\n");printf (" ");for (i=0; i<10; i++) printf("%d "

REMOTE PROGRAMMING 4-20do{ch = getch ();if ((ch == 'q')||(ch =='Q')){ flushall(); exit(0); }}while(ch != ' ');Erase(2

REMOTE PROGRAMMING 4-21EXAMPLE PROGRAM 4IBM PC, IBM BASIC using the RS232 interfaceIn this example, the IBM PC serial port COM1: is used at 9600 b

PERFORMANCE TESTS 5-1PERFORMANCE VERIFICATIONThe performance verification procedures in this section test and verify the performance of the SR715/

PERFORMANCE TESTS 5-22. Self TestsThe internal self tests verify the functionality of the SR715/720.1) Turn on the unit. The ROM firmware version

PERFORMANCE TESTS 5-35. Capacitance Measurement This verifies that the SR715/720 is able to measure components at different frequencies. The limit

PERFORMANCE TESTS 5-4PERFORMANCE TESTSThese tests are intended to measure the SR715/720's conformance with its published specifications. Thes

SR715/720 LCR METER viGENERAL INFORMATION The SR715/720 LCR Meters are multifrequency impedance measuring instruments, capable of measuring

PERFORMANCE TESTS 5-52. Amplitude AccuracyThis test measures the amplitude accuracy of the drive output. It should be within 2.0% of the nominalva

PERFORMANCE TESTS 5-6Resistance Accuracy Tableresistance rangeconditions SR715 tol. + R tol. SR720 tol. + R tol.10.0 3 1 kHz series 9.9780 - 10.02

PERFORMANCE TESTS 5-7Capacitance Accuracy Tablecapacitance Frequency Range SR715 tol. + C tol. SR720 tol. + C tol.1.0n 1 kHz 0 .99780n - 1.0022n .

PERFORMANCE TESTS 5-8SR715/720 PERFORMANCE TEST RECORDSerial # __________________ Date _________________Tested by _________________________Equipme

PERFORMANCE TESTS 5-9* 100 kHz measurements for SR720 only.Resistance Accuracyresistance range conditions Value Pass Fail10.0 3 1 kHz series _____

CALIBRATION 5-10INTRODUCTIONCalibration of the SR715/720 is composed of several parts: open and short circuit calibration, standard resistorcalibr

CALIBRATION 5-11Amplitude Calbytes Amplitude Calbyte Numbers 0 thru 94Range 0 - 255 (1 byte)Amplitude Calbyte OrganizationFrequencyAmplitude 100

CALIBRATION 5-12Necessary EquipmentInstrument Critical Specifications Recommended ModelTime Interval Counter Time Interval Accuracy SRS SR6201 ns

CALIBRATION 5-13 Amplitude Limits Tablecalbyte nominal voltage limits0-4 0.100 0.098 - 0.1025-9 0.150 0.147 - 0.15310-14 0.200 0.196 - 0.204

CALIBRATION 5-143. Standard Resistor CalibrationThis procedure determines the value of the internal standards for the different frequencies and ra

SR715/720 LCR METER viiACCURACY Conditions At least 30 minute warm up, 23 °C ± 5 °C. Basic Accuracy SR715: 0.20% SR720: 0.05%

TROUBLESHOOTING 6-1Nothing Happens At Turn On Make sure that the power entry module on the rear panel is set for the ac linevoltage for your regio

TROUBLESHOOTING 6-2Error Messages The following lists explain all of the error messages that the SR715/720 cangenerate. The messages are divided i

TROUBLESHOOTING 6-3Message Status MeaningCode Err XX 2 The SR715/720's ROM has a checksum error. XX is the checksumvalue.CPU Error 1 The SR71

TROUBLESHOOTING 6-4Calibration Errors These error messages can be generated by the open, short, and standardcalibration procedures. If the SR715/7

MAINETENANCE 6-5BUILT IN FIXTURECLEANING Several times a year, both the radial and axial test fixtures should be examinedfor any build up of waxy

MAINTENANCE 6-6After the fixture bracket is detached, remove the 1/4" nuts holding the fixture tothe bracket. Slide the plastic lead catcher

MAINETENANCE 6-7over the fixture and back of the unit. Finally, replace the four screws at thecorners of the unit.SURFACE MOUNT TWEEZERSCLEANING

MAINTENANCE 6-8

SR715/720 PARTS LIST 7-1Main Board Parts ListREF.SRS PART# VALUE DESCRIPTIONBT801 6-00001-612 BR-2/3A 2PIN PC BatteryC 101 5-00243-540 .47U Capacit

SR715/720 PARTS LIST 7-2REF. SRS PART# VALUE DESCRIPTIONC 610 5-00022-501 .001U Capacitor, Ceramic Disc, 50V, 10%, SLC 611 5-00022-501 .001U Capaci