Lake Shore Cryotronics Measure Ready M91 FastHall, User Manual

Page: 122 / 195

112 c
HAPTER
4: Computer Interface Operation
MeasureReady™ M91 FastHall™ Measurement Controller
HALl:HBAR[:DC]:STARt
Summary Performs a DC Hall measurement for a Hall bar sample.
Command Format HALl:HBAR[:DC]:STARt <excitationType>,<excitationValue>,<excitationRange>,
<excitationMeasurementRange>,<measurementRange>,<complianceLimit>,
<maxNumberOfSamples>,<userDefinedFieldReadingInTesla>,
<withFieldReversal>,<resistivity>,<blankingTime>,<sampleThickness>,
<minimumSnr>,<samplingTime>
Parameters <excitationType> VOLTage, CURRent
Data type is NAMED
<excitationValue> For voltage excitation, -10 to 10 V
For current excitation, -100 e-3 to 100 e-3 A
Data type is
NRf
<excitationRange> For voltage excitation 0 to 10 V
For current excitation 0 to 100 e-3 A
AUTO sets the range to the best fit range for a given
excitation value.
NOTE: The hardware will be configured to best meet the
desired range.
Data type is
Number
<excitationMeasurementRange> For voltage excitation 0 to 10 V
For current excitation 0 to 100 e-3 A
AUTO sets the measurement range to the best fit range for a
given excitation range.
NOTE: The hardware will be configured to best meet the
desired range.
Data type is
Number
<measurementRange> For voltage excitation, specify the current measurement
range 0 to 100 e-3 A
For current excitation, specify the voltage measurement
range 0 to 10 V
NOTE: The hardware will be configured to best meet the
desired range.
Data type is
Number
<complianceLimit> For voltage excitation, specify the current limit 100 e-9 to
100 e-3 A
For current excitation, specify the voltage compliance
1 to 10 V
Data type is
NRf
<maxNumberOfSamples> When minimumSnr is omitted or INFinity (9.9 e+37),
the total number of samples to average is 1-1000.
When minimumSnr is specified, the maximum number of
samples to average is 10-1000.
Data type is Number
<userDefinedFieldReadingsInTesla>The field, in units of tesla, the sample is being
subjected to. Used for calculations.
Data type is
NRf
<withFieldReversal> Specifies whether or not to apply reversal field.
DEFault = true
Data type is
bool
<resistivity> The resistivity of the sample in units of ohm*meters (bulk)
of ohms per square (sheet). Used for calculations.
Measure this value using the RESistivity SCPI subsystem.
Defaults to not a number which will propagate through
calculated values.
DEFault = NaN (9.91 e+37)