Section 9: Filters and math Model 6517B Electrometer Reference Manual
9-8 6517B-901-01 Rev. C / August 2015
Polynomial
This math operation allows you to mathematically manipulate normal display readings (X) according
to the following polynomial calculation:
Y = (a2)X
2
+ (a1)X + (a0)
Where:
X is the normal display reading
a2, a1, and a0 are user-entered constants
Y is the displayed result
The value of the a2, a1, and a0 constants can be changed through the CONFIGURE MATH menu.
The before and after calculation can be viewed with one of the multiple displays. When necessary,
the resulting Y value is displayed in scientific notation.
Percent
This operation lets you specify a target reading value. The displayed reading is expressed as a
percentage of the target value, often in scientific notation. The percentage calculation is performed as
follows:
As an example, consider the default target value for percentage calculations, where:
100 % = +1.000000e+00
Therefore, a 1V input would be 100 % of the target value and a typical reading would be displayed as
follows:
+100.000 V %
With the calculate multiple display selected, the display would be:
+100.000 V %
Reading = +1.00000
The bottom line displays the reading (in the units and multiplier prefix of the top line) before the
percentage calculation is performed.
Percent deviation
The following math calculation provides the percent deviation between the normal display reading
and the user specified reference value:
Where:
X is the normal display reading
Y is the specified reference value
Percent Deviation is enabled through the CONFIGURE MATH menu.
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