User manual

Section 6: Relative, Math, and dB Series 3700 System Switch/Multimeter Reference Manual
6-4 3700S-901-01 Rev. C / July 2008
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.
m and b are the user-entered constants for scale factor and offset.
Y is the displayed result.
Use dmm.math.mxb.bfactor (on page 13-148) and
dmm.math.mxb.mfactor (on page 13-149) to set the b and m factor for mX+b.
Once all settings are configured, use dmm.math.enable = dmm.ON to enable
math operation.
NOTE The REL'ed reading of the input signal (if using REL) is used by the
mX+b calculation.
mX+b REL
Use the mX+b function to manually establish a REL value. To do this, set the
scale factor (M) to 1 and set the offset (b) to the REL value. Each subsequent
reading will be the difference between the actual input and the REL value
(offset).
Setting mX+b units
The attribute for dmm.math.mxb.units (on page 13-149) must be one
character enclosed in single or double quotes. It can be any letter of the
alphabet, the degrees symbol (°), or the ohms symbol (Ω).