Lake Shore Cryotronics Measure Ready M91 FastHall, User Manual

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126 c
HAPTER
4: Computer Interface Operation
MeasureReady™ M91 FastHall™ Measurement Controller
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
<userDefinedFieldReadingInTesla> 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)
NOTE: When the resistivity is omitted or NaN (9.91 e+37),
mobility is not calculated.
Data type is
Number
<blankingTime> The time, in seconds, to wait for hardware to settle before
gathering readings.
0.5 ms to 300 s with a resolution of 0.1 ms
DEFault = 2 ms
MINimum = 0.5 ms
MAXimum = 300 s
Data type is
Number
<sampleThickness> Thickness of the sample in meters.
0 to 10 e-3 m
DEFault = 0 m
Data type is
Number
<MinimumSnr> The desired signal-to-noise ratio of the measured
resistance, calculated using measurement average voltage/
error of mean 1 - 1000, or INFinity (9.9e+37).
DEFault = Infinity
Data type is
Number
<samplingTime> The sampling time, in seconds, which measurements will be
averaged over to get one sample.
MINimum = 0.010 ms
MAXimum = 1 s
DEFault = 1/60 s
Data type is
Number
Example HAL:DC:START Current,10E-3,10E-3,10E-3,1.0,10,5,0.6,1,0.216,100e-3,1e-2,30