Front Panel Operation
3-92
3.10 Math
Model 2001 math operations are divided into four catego-
ries:
• Math performed on single readings (mX+b and per-
cent).
• 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 re-
called 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 avail-
able from the CONFIG-SCAN menu, as discussed in para-
graph 3.11.
Note that once enabled for a function, the mX+b, percentage,
and percent deviation calculations are in effect across func-
tion changes.
igure 3-41
nalog 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
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 accord-
ing 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 resulting
Y value is displayed in scientific notation.
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