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ABM-4082
3.8
Math Functions
Model DMM math operations are divided into four categories:
mX+b and percent
dB and dBm calculations
Statistics of buffered readings
Limit testing
The first two categories are discussed here; buffered reading statistics and reading limit testing are
described in the next chapter – Measurement Options
Notes: Once enabled for a function, the mX+b and percentage calculations are in effect across
function changes.
3.8.1
mX+b
This math operation lets you manipulate normal display readings (X) mathematically according to the
following calculation:
Y = mX + b
Where: X is the normal display reading
To configure the mX+b calculation, perform the following steps:
1. Press mX+b for mX+b math operation and the present scale factor M will be displayed:
M：+1.00000
2. Use the
and
increment or decrement the digits. Enter a value and units prefix.
3. Press Auto (ENTER) to confirm the M value and the message "CHANGE SAVED" will be displayed
for a moment and then the present B value will be displayed.
B：+0.00000 m
4. Enter a value and units prefix.
5. Press Auto (ENTER) to confirm the B value, "CHANGE SAVED" will be displayed.
6. DMM returns back to the measurement status and displays the results of calculations.
If you want to change the M and B parameter values after enabling the math function, besides the foregoing
method you can take actions as below:
1. Press Shift →
2. Press
key to enter the parameter level and the present scale factor M will be displayed:
M: +1.00000 .
3. Use the
and
increment or decrement the digits. Enter a value and units prefix.
4. Press Auto (ENTER) to confirm the M value and the message "CHANGE SAVED" will be displayed for
28
m and b are user-entered constants for scale factor and offset
Y is the displayed result
keys to choose a numerical place and use
, "1: SET
M" will be displayed (Command level).
keys to choose a numerical place and use
and
keys to
and
keys to
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