Model SR715 Model SR720 LCR Meters

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OPERATIONCONNECTING A DEVICEThe SR715/720 has a built in Kelvin fixture for measuring radial leaded components and adapters formeasuring axial leaded components. The fixture provides a 4-wire Kelvin connection to the device under testto minimize stray impedances that cause measurement errors. Most components will fit into this fixture, thuseliminating the need for special fixtures. Remember, whenever the fixture configuration is changed, openand short circuit calibrations should be performed before making measurements. Open and short circuitcalibration values are stored in non-volatile memory with the [Store] and [Recall] keys along with the completeinstrument setup. This allows compensation values for different fixtures to be stored then recalled wheneverdifferent measurement setups are required. Also remember that when measurements are in progress, keephands or any other objects away from the fixture because the measurement accuracy may be affected. Thereis a cover beneath the fixture to catch any leads that might fall through the fixture. For information on removingleads or general maintenance to the fixture in general, refer to the Maintenance section.RADIAL LEADED PARTSAXIAL LEADED PARTSTo measure parts with radial leads, (leads coming out the same side of thepackage) first remove any adapters or parts from the fixture, since they willinterfere with making a Kelvin connection. Next, make sure the leads arereasonably clean of wax or other coatings. These can cause an unreliable contactand gradually build up in the fixture. Insert one lead into each side of the fixture,approximately centered and make the measurement.To measure parts with axial leads, (leads coming out opposite ends of thepackage) first remove any parts from the fixture. Install the axial adapters in thecenter of each fixture half and slide them apart or together so the DUT will beapproximately centered in the fixture. Check that the leads are reasonably cleanand insert one lead in each side of the fixture adapter. After removing the axiallead adapters, replace them in the two storage slots behind the fixture so as notto misplace them.Radial Fixture (with part) Axial Fixture (with part)2-12
OPERATIONCOMPONENT DIMENSIONS The radial fixture can accommodate components with a lead spacing from0.2" (5mm) up to 3.8" (96.5mm) with a minimum lead length of 0.16" (4mm). Theaxial lead adapter can accommodate parts with a maximum body length of 2.7"(68.6mm) and a maximum diameter of 1.8" (45.7mm). The closest the adapterscan get is 0.12" (3.0mm). The minimum lead length (of each lead) is 0.25"(6.4mm). However the minimum length of the part and lead combined is 0.7"(17.8mm). See the diagrams below. Lead diameter for either fixture configurationcan vary from 0.008" (.20mm or 32 AWG) up to 0.070" (1.8mm or 13 AWG).OPTIONAL FIXTURESADAPTERThe Kelvin Clips, SMD Tweezers and BNC adapters all connect to theSR715/720 fixture using the same adapter. To install the fixture adapter, firstremove any parts or adapters from the fixture. Then plug the fixture adapter intothe fixture, matching the polarity of the adapter to the polarity of the SR715/720.Make certain that the center clips makes contact with the center guard ground.2-13
Page 1 and 2: User’s ManualModel SR715Model SR7
Page 3: TABLE OF CONTENTSOutput Voltage 5-2
Page 6 and 7: SR715/720 LCR METERGENERAL INFORMAT
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 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
Page 56 and 57: REMOTE PROGRAMMINGByte Character Me
Page 58 and 59: REMOTE PROGRAMMINGSR715/720 will us
Page 60 and 61: REMOTE PROGRAMMING8 Instrumentation
Page 62 and 63: REMOTE PROGRAMMINGSTANDARD EVENT bi
Page 64 and 65: REMOTE PROGRAMMINGexit (0);}ibwrt (
Page 66 and 67: REMOTE PROGRAMMINGTxGpib (sr720,"OU
Page 68 and 69: REMOTE PROGRAMMINGEXAMPLE PROGRAM 3
Page 70 and 71: REMOTE PROGRAMMING}printf ("bin 0 1
Page 72 and 73: REMOTE PROGRAMMINGEXAMPLE PROGRAM 4
Page 74 and 75: PERFORMANCE TESTS2. Self TestsThe i
Page 76 and 77: PERFORMANCE TESTSPERFORMANCE TESTST
Page 78 and 79: PERFORMANCE TESTSResistance Accurac
Page 80 and 81: PERFORMANCE TESTSSR715/720 PERFORMA
Page 82 and 83:
CALIBRATIONINTRODUCTIONCalibration
Page 84 and 85:
CALIBRATIONNecessary EquipmentInstr
Page 86 and 87:
CALIBRATION3. Standard Resistor Cal
Page 88 and 89:
TROUBLESHOOTINGError MessagesThe fo
Page 90 and 91:
TROUBLESHOOTINGCalibration ErrorsTh
Page 92 and 93:
MAINTENANCEAfter the fixture bracke
Page 94 and 95:
MAINTENANCE6-8
Page 96 and 97:
SR715/720 PARTS LISTREF. SRS PART#
Page 98 and 99:
Page 100 and 101:
Page 102 and 103:
Page 104 and 105:
Page 106:
SR715/720 PARTS LISTMiscellaneous a
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Model SR715 Model SR720 LCR Meters

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