Selecting And Configuring Math - Keithley 6517B Reference Manual

Section 9: Filters and math

Selecting and configuring math

The polynomial, percent ratio, percent deviation, or logarithmic calculation is selected and configured
from the CONFIGURE MATH menu (see the table below). The selected calculation is enabled by
pressing the MATH key (MATH annunciator turns on). The Model 6517B then displays the result of
the calculation, using scientific notation where necessary. The following display messages indicate
which math calculation is being used:

NONE: No calculation selected

POLY: Polynomial

%: Percent calculation selected

%DEV: Percent deviation calculation selected

DEV: Deviation calculation selected

RAT: Ratio calculation selected

LOG: Logarithmic calculation selected
Pressing MATH a second time disables the calculation.
CONFIGURE MATH menu structure
Menu item
None
Polynomial
Percent
%DEV
DEVIATION Select deviation calculation and enter reference value
Ratio
Log10
NONE
With this menu item, no math operation goes into effect when the MATH key is pressed. The MATH
annunciator lights, but NONE is displayed on the top line.
Polynomial
This menu item selects the polynomial calculation and allows you to program the polynomial
constants. The "a2" constant is displayed first. You can retain the displayed value or key in a new
value. In either case, press ENTER to display the "a1" constant. Retain or change this constant and
press ENTER to display the "a0" constant. If you change the "a0" constant, be sure to press ENTER
again.
Percent
This menu item selects the percent calculation and lets you specify the target value. If you key in a
new target value, be sure to press ENTER.
%DEV
This menu item selects the percent deviation calculation and lets you specify the reference value. If
you key in a new reference, be sure to press ENTER.
9-10
Description
Select no calculation when MATH key is pressed
Select polynomial calculation and enter constants
Select percent calculation and enter target (reference) value
Select percent deviation calculation and enter reference value
Select ratio calculation and enter reference value
Select logarithmic base 10 calculation
Model 6517B Electrometer Reference Manual
6517B-901-01 Rev. C / August 2015