Model SR715 Model SR720 LCR Meters

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OPERATIONTEST CONDITIONSDEFAULT CONDITIONSIf the back space key [
OPERATIONbeen programmed with the vernier setting, none of the primary drive voltage LEDs will be on. To return to theprimary output levels, press the [Select] key. The output voltage will be increased to the next highest primarylevel.The output voltage is applied to the device under test through a sourceimpedance, thus, the voltage across the device is always less than or equal to theoutput voltage. The different source impedances are 25 Ω (R3), 400 Ω (R2),6.4 kΩ (R1), and 100 kΩ (R0), all accurate to 2 %. The source impedance isselected as a function of the measurement range, unless the unit is in constantvoltage mode. In the constant voltage mode, the source impedance is always25 Ω. See the next section for determining which measurement range the unit isusing.1.0Voltage Across DUT vs DUT ImpedanceFor Different RangesNormalized to 1.0 Volt0.8R3 orCVR2 R1 R00.6Volts0.40.20.010 -110 010 110 210 310 410 510 610 710 8DUT ImpedanceThe graph above shows the voltage across the Device Under Test (DUT) vs theDUT impedance for the different measurement ranges. The values arenormalized to a 1.0 V output drive setting; for different applied voltages simplyscale the graph values by the applied voltage. Note that the voltage applied to theDUT is nearly equal to the output voltage at the upper end of each range anddecreases with lower impedance toward the lower end of the range. This isbecause of the output source impedance. If the unit is in constant voltage (CV)mode, the source impedance is always set to 25 Ω. For any impedancesignificantly larger than 25 Ω, the voltage across the part is essentially equal tothe output drive voltage.For most devices, including resistors, most capacitors and many inductors, the1.0 Vrms setting is the most appropriate setting. For some inductors and activedevices, such as diodes and transistors, the 0.25 or 0.10 Vrms setting should beused. Certain devices require a specific test voltage, such as Z5U ceramic disk2-5
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 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
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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