User manual

Front Panel Operation
3-92 2001-900-01 Rev. K/ August 2010
3.10 Math
Model 2001 math operations are divided into four
categories:
• Math performed on single readings (mX+b and
percent).
• Math performed on buffered readings (maximum and
minimum values, average, and standard deviation).
• Math performed on single readings as a part of a pass/
fail limits test.
• Math performed on scanned readings (ratio and delta).
The first category is configured from the CONFIG-MATH
menu and is described in this paragraph. Math operations on
buffered readings are available in multiple displays of
recalled data and are discussed in paragraph 3.8. Limit tests
are described in paragraph 3.12, under main menu
operations. Ratio and delta calculations on scanned channels
are available from the CONFIG-SCAN menu, as discussed
in paragraph 3.11.
Note that once enabled for a function, the mX+b, percentage,
and percent deviation calculations are in effect across
function changes.
NOTE
The Model 2001 uses IEEE-754 floating
point format for math calculations.
3.10.1 mX+b
This math operation allows you to automatically multiply
normal display readings (X) by a scale factor (m) and add an
offset (b). The result (Y) is displayed on the top line
according to the formula:
Y = mX + b
The mX+b math operation is useful when slope calculations
are required for a series of measurements.
The values of the “m” and “b” constants can be changed
through the CONFIG-MATH menu. The before and after
calculation can be viewed with one of the next displays, as
described in paragraph 3.10.5. When necessary, the result-
ing Y value is displayed in scientific notation.
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Analog filter
DCV
Input
Protection
Analog
Filter
Preamplifier
A/D
Converter
0.01-10 PLC
Digital
Filter
Off (GPIB default)
Averaging
Advanced (bench default)
Front Panel Display
IEEE-488 Bus
Buffer
Off (default)
On
Filter off
Filter on
10Hz 100Hz 1kHz 10kHz 100kHz 1MHz
-30dB
-20dB
-10dB
0dB
A. Model 2001 block diagram (DCV input)
B. Analog filter frequency response