User manual

Section 13: Instrument Control Library (ICL) Series 3700 System Switch/Multimeter Reference Manual
13-148 3700S-901-01 Rev. C / July 2008
dmm.math.format
Remarks
To have no math operation performed on the measurements, set this attribute to
dmm.MATH_NONE. Having this equal dmm.MATH_NONE and enabling math
operation (dmm.math.enable), the equivalent effect is disabling math operation.
Use a setting of dmm.MATH_MXB to have
Y = mX + b where X is the normal measurement
m is user entered constant for scale factor (dmm.math.mxb.mfactor (on page 13-149))
b is user entered constant for offset (dmm.math.mxb.bfactor (on page 13-148))
Y is the result
When using relative offset measurement control (dmm.rel.enable (on page 13-159)),
the rel‟ed reading is used for X.
Use a setting of dmm.MATH_PERCENT to have:
where:
Input is the normal measurement (if using REL, it will be the Rel‟ed value)
Reference is user entered constant (dmm.math.percent (on page 13-150))
Percent is the result
Use a setting of dmm.MATH_RECIPROCAL for 1/X operation, where X is normal or
REL‟ed measurement value.
The desired math operation is performed before any of the enabled limit testing.
Default setting is dmm.MATH_PERCENT.
Also see
dmm.math.enable (on page 13-147)
dmm.math.mxb.bfactor (on page 13-148)
dmm.math.mxb.mfactor (on page 13-149)
dmm.math.percent (on page 13-150)
Example
To enable the reciprocal operation on measurements:
dmm.math.format = dmm.MATH_RECIPROCAL
dmm.math.enable = dmm.ON