Keithley Interactive SourceMeter 2450, Справочное руководство

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Model 2450 Interactive SourceMeter® Instrument Reference Manual Section 8: TSP command reference
2450-901-01 Rev. B/September 2013 8-115
smu.measure.math.percent
This attribute specifies the constant to use when math operation is set to percent.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes Restore configuration
Instrument reset
Power cycle
Measure configuration list
Function change
Configuration script
Measure configuration list
1
Usage
value = smu.measure.math.percent
smu.measure.math.percent = value
value
The constant when the math operation is set to percent; the range is − 4294967295
to + 4294967295
Details
This is the constant that is used when the math operation is set to percent for the selected measurement
function.
The percent math function displays measurements as percent deviation from a specified constant. The percent
calculation is:
Where:
• Percent is the result
• Input is the measurement (if relative offset is being used, this is the relative offset value)
• Reference is the user-specified constant
Example
smu.measure.func = smu.FUNC_DC_VOLTAGE
smu.measure.math.format =
smu.MATH_PERCENT
smu.measure.math.percent = 50
smu.measure.math.enable = smu.ON
Set the measurement function to voltage.
Set the math operations to percent.
Set the percentage value to 50 for voltage
measurements.
Enable math operations.
Also see
Calculations that you can apply to measurements (on page 3-6)
smu.measure.math.enable (on page 8-111)
smu.measure.math.format (on page 8-112)