B&K Precision 5492BGPIB - Manual - Manual (Page 32)

Basic Measurements
32
3.8 Math Functions
The multimeter 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 in this section, while buffered reading statistics and reading
limit testing are described in the next chapter, “Measurement Options”.
Notes: Once math is enabled for a function, the mX+b and percentage calculations will take
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 normally display actual reading
m and b are user-entered constants for scale factor and offset respectively
Y is the displayed result
To configure the mX+b calculation, perform the following steps:
1. Press for mX+b math operation and the present scale factor M will be displayed:
M: +1.00000
2. Use the and keys to select the cursor position and use and keys to
increment or decrement the selected digits respectively. When the cursor position selects “ ”, the
up and down arrow keys can be used to move the decimal place left or right of its current position.
3. Press (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. “m” is the default unit and represents
milli (10 -3 ).
B: +0.00000 m
4. Enter a value using the arrow keys, similar to step 2 above.
5. Press (ENTER) to confirm the B value, “CHANGE SAVED” will be displayed.
6. The multimeter then returns back to the main display and will now show the results of the mX+B
calculation. The right of the display will show MXB.
If you want to change the M and B parameter values after enabling the math function at any time, you
can also do the following:
1. Press → , “1: SET M ” will be displayed (Submenu level).
2. Press key to enter the parameter level and the present scale factor M will be displayed:
M: +1.00000 .
3. Use the and keys to select the cursor position and use and keys to