13.07.2015 Views

Model SR715 Model SR720 LCR Meters

Model SR715 Model SR720 LCR Meters

Model SR715 Model SR720 LCR Meters

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REMOTE PROGRAMMING8 Instrumentation Amp Error. The input instrumentation amplifier failedits test.9 Output Error. The output impedance selector failed its test. Thiserror may occur if there is a part in the fixture when the test isexecuted.$CBT(?) i {,j}The $CBT command sets amplitude calbyte i to the value j. i may range from0 to 94, and j from 0 to 255.$CFT(?) i {,x} The $CFT command sets floating point calbyte i to the floating point value x.$CMJ(?) {x}$CMN(?) {x}$CNT?$CRN(?) {i}$CTS? i$DIA(?) {i}$FRQ(?) {x}$GAN(?) {i}$INP(?) {i}$INT(?) {i}$PHS(?) {i}The $CMJ command sets the major parameter to be used in the standardresistor calibration to x Ohms. If x differs by more than 10% from the nominalvalue of the range being calibrated an error is generated.The $CMN command sets the minor parameter value for standard resistorcalibration. x has units of ppm and may range between ±9999.9 ppm with 0.1ppm resolution. The $CMN? query reads the current minor parameter.Reads the raw A/D converter counts when in diagnostic mode.The $CRN command sets the range to be calibrated in standard resistorcalibration to range i. The $CRN? query reads the present calibration range.The $CTS? query returns the raw A/D converter counts during normalmeasurements. i = 0 and i = 1 return the inphase and quadrature counts forthe voltage measurement, while i = 2 and i = 3 return the inphase andquadrature counts for the current measurement.The $DIA command disables (i=0) and enables (i=1) diagnostic modemeasurements. The $DIA? query returns the diagnostic mode status.The $FRQ command sets the frequency correction factor to x ppm. x isrounded to the nearest 0.1 ppm and must be less than ±10000 ppm. The$FRQ? query returns the current frequency correction factor.The $GAN command sets the instrumentation amplifier gain to setting i whenthe instrument is in diagnostic mode. The $GAN? query returns the presentgain setting.The $INP command sets the input multiplexer to input i when the instrumentis in diagnostic mode. The $INP? query returns the present input setting.The $INT command sets the measurement time to i cycles of the drivewaveform. i may range between 1 and 10000 cycles, restricted so that thetotal measurement time is less than 10 seconds. The $INT? query returns thepresent measurement time.The $PHS command sets the phase of the measurement relative to the drivesignal when the instrument is in diagnostic mode. The phase can be 0° (i=0),180° (i=1), 90° (i=2), or 270° (i=3). The $PHS? query returns the presentmeasurement phase.$RND(?) {i} The $RND command sets the rounding of the measurement results. If i = -1the <strong>SR715</strong>/720 automatically rounds to the correct number of digits given thecurrent range, value, etc.. If i = 0, 1, 2, or 3 the measurement result will berounded to 5 - i digits of resolution. The $RND? query returns the currentrounding setting.4-9

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