Mx+B; Percent - Tektronix Keithley SourceMeter 2470 Reference Manual

Section 4: Sourcing and measuring

mx+b

The mx+b math operation lets you manipulate normal display readings (x) mathematically based on
the following calculation:
mx + b = Y
Where:
•
m is a user-defined constant for the scale factor
•
x is the measurement reading (if you are using a relative offset, this is the measurement with
relative offset applied)
•
b is a user-defined constant for the offset factor
•
Y is the displayed result
When the mx+b math operation is active, the unit of measure for the front-panel voltage and current
readings is X and the MATH indicator is displayed to the right of the measurement. For resistance
readings, the units of measure do not change. You cannot change this units designator.

Percent

The percent math function displays measurements as percent deviation from a specified reference
constant. The percent calculation is:
Where:
•
Percent = The result
•
Input = The measurement (if relative offset is being used, this is the relative offset value)
•
Reference = The user-specified constant
The result of the percent calculation is positive when the input is more than the reference. The result
is negative when the input is less than the reference.
When the percent operation is active, the unit of measure for the front-panel voltage and current
readings is % and the MATH indicator is displayed to the right of the measurement. For resistance
readings, the units of measure do not change. You cannot change the unit designator.
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2470 High Voltage SourceMeter Instrument Reference Manual
2470-901-01 Rev. A / May 2019