Model SR715 Model SR720 LCR Meters

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SR715/720 LCR METERGENERAL INFORMATIONThe SR715/720 LCR Meters are multifrequency impedance measuring instruments, capable of measuringresistance, capacitance or inductance over a range of more than 13 orders of magnitude. The SR720 has abasic accuracy of 0.05% and has 5 test frequencies. The SR715 has a basic accuracy of 0.2% and 4 testfrequencies.The LCR meters are controlled by a high speed microcontroller that operates the display, keypad, RS232 andGPIB computer interfaces, and handler interface, as well as setting measurement conditions and performingcalculations. In addition, non-volatile storage is provided for 9 complete instrument settings.SPECIFICATIONSDISPLAYMeasurement ModesEquivalent CircuitParameters DisplayedAuto, R+Q, L+Q, C+D, C+RSeries or ParallelValue, Deviation, % Deviation or Bin Number.Deviation and % deviation are calculated from a stored relative value.2 - 10 MeasurementsAveragingMeasurement Range R+Q: R 0.0001 Ω - 2000 MΩQ 0.00001 - 50L+Q: L 0.0001 µH - 99999 HQ 0.00001 - 50C+D: C 0.0001 pF - 99999 µFD .00001 -10C+R: C 0.0001 pF - 99999 µFR .00001 - 99999 kΩTEST CONDITIONSTest Frequency100 Hz, 120 Hz, 1 kHz, 10 kHz, 100 kHz (100 kHz - SR720 only).Frequency accurate to ±100ppm.Drive VoltagePreset Levels: 0.10, 0.25, and 1.0 Vrms.Vernier: 0.1 to 1.0 Vrms with 50 mV resolution.Drive levels accuracy ±2%.Measurement Rate Slow, Medium, Fast: 2, 10, or 20 measurements per second at testfrequencies of 1 kHz and above and about 0.6, 2.4, or 6 measurements persecond at 100 Hz and 120 Hz.RangingAuto or ManualTriggeringContinuous, Manual, or Remote over RS232, GPIB or Handler InterfaceBias Voltage Internal: 2.0 VDC ±2%External : 0 to +40 VDC (fused @ 0.25 A)v
SR715/720 LCR METERACCURACYConditionsAt least 30 minute warm up, 23 °C ± 5 °C.Basic Accuracy SR715: 0.20%SR720: 0.05%See the Accuracy section for detailed accuracy specifications.The table below summarizes the typical use accuracy.Accuracy SR720 SR715better than 1% 0.125 Ω < R < 16 MΩ 0.143 Ω < R < 14 MΩ2.5 µH < L < 25 kH 2.9 µH < L < 22 kH1.25 pF < C < 12.8 mF 1.43 pF < C < 11.2 mFbetter than 5% 21 mΩ < R < 96 MΩ 21 mΩ < R < 94 MΩ420 nH < L < 150 kH 426 nH < L < 150 kH0.21 pF < C < 77 mF 0.21 pF < C < 75 mFThe following conditions apply:1) 1.0, 0.5 or 0.25 V output voltage2) Slow or medium measurement speed3) Q and D < 0.1 for R and C4) Q > 10 for L5) 100 Hz, 120 Hz or 1 kHz test frequency for R6) 100 Hz test frequency for Lmax and Cmax7) 10 kHz test frequency for Lmin and CminFEATURESFixture4-Wire Kelvin fixture for radial leaded parts with adapters for axial leadedparts.ProtectionProtected up to 1 Joule of stored energy, 200 VDC max (for chargedcapacitors).Fused at 0.25 A output current for biased measurement.ZeroingOpen and Short Circuit Compensation.Compensation Limits Short: R < 20 Ω, Z < 50 ΩOpen: Z > 10 kΩBinningUp to 8 Pass Bins, QDR and General Fail Bins, all defined from the frontpanel or over the computer interfaces. Binning setups may be stored in nonvolatilememory.Self TestTests the ROM, CPU, Non-Volatile RAM, Clock Generator, A/D Converter,Internal Bias, Multiplier, Output Drive Circuitry, Gain Circuitry, and SourceResistances.Store and RecallStores 9 Complete Instrument Setups. Recall 0 recalls Default Setup.RS232 InterfaceAll instrument functions can be controlled or read over the interface.GENERALOperating ConditionsPowerDimensions (W x H x L)WeightWarranty0 - 50 °C,
Page 1 and 2: User’s ManualModel SR715Model SR7
Page 3: TABLE OF CONTENTSOutput Voltage 5-2
Page 8 and 9: SR715/720 LCR METEROPTIONSGPIB / Ha
Page 10 and 11: SR715/720 LCR METERSeries and Paral
Page 12 and 13: SR715/720 LCR METERHow the SR715/72
Page 14 and 15: SR715/720 LCR METERSENA(?) {i} Set
Page 16 and 17: DISPLAYGETTING STARTEDThe LED displ
Page 18 and 19: GETTING STARTEDmode. The range can
Page 20 and 21: GETTING STARTEDREAR PANELPOWER ENTR
Page 22 and 23: OPERATIONSERIES and PARALLEL EQUIVA
Page 24 and 25: OPERATIONTEST CONDITIONSDEFAULT CON
Page 26 and 27: OPERATIONcapacitors (test voltage =
Page 28 and 29: OPERATIONRange Change Points When A
Page 30 and 31: OPERATIONwhere T s = settling time,
Page 32 and 33: OPERATIONCONNECTING A DEVICEThe SR7
Page 34 and 35: OPERATIONKELVIN CLIPSKelvin Clips p
Page 36 and 37: OPERATIONOPEN and SHORT CIRCUIT OR
Page 38 and 39: BINNINGOPERATIONThe SR715/720 has b
Page 40 and 41: OPERATIONVALUES FORFAIL BINS (8 & 9
Page 42 and 43: OPERATIONOption 01: GPIB/Handler In
Page 44 and 45: ACCURACYDETAILED ACCURACY SPECIFICA
Page 46 and 47: 3-3ACCURACY
Page 48 and 49: ACCURACYL + Q ACCURACYAccuracy of L
Page 50 and 51: ACCURACYC + R ACCURACYAccuracy of C
Page 52 and 53: REMOTE PROGRAMMINGINTRODUCTIONThe S
Page 54 and 55: REMOTE PROGRAMMINGDETAILED COMMAND
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REMOTE PROGRAMMINGByte Character Me
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REMOTE PROGRAMMINGSR715/720 will us
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REMOTE PROGRAMMING8 Instrumentation
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REMOTE PROGRAMMINGSTANDARD EVENT bi
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REMOTE PROGRAMMINGexit (0);}ibwrt (
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REMOTE PROGRAMMINGTxGpib (sr720,"OU
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REMOTE PROGRAMMINGEXAMPLE PROGRAM 3
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REMOTE PROGRAMMING}printf ("bin 0 1
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REMOTE PROGRAMMINGEXAMPLE PROGRAM 4
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PERFORMANCE TESTS2. Self TestsThe i
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PERFORMANCE TESTSPERFORMANCE TESTST
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PERFORMANCE TESTSResistance Accurac
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PERFORMANCE TESTSSR715/720 PERFORMA
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CALIBRATIONINTRODUCTIONCalibration
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CALIBRATIONNecessary EquipmentInstr
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CALIBRATION3. Standard Resistor Cal
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TROUBLESHOOTINGError MessagesThe fo
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TROUBLESHOOTINGCalibration ErrorsTh
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MAINTENANCEAfter the fixture bracke
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MAINTENANCE6-8
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SR715/720 PARTS LISTREF. SRS PART#
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SR715/720 PARTS LISTMiscellaneous a
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