Keithley 3700 series Reference Manual page 244

Section 9: Instrument Control Library (ICL)
dmm.math.enable
Example
dmm.math.format
Attribute
Usage
Remarks
9-100
To enable math operation on measurements:
dmm.math.enable = dmm.ON
Specifies the math operation to perform on measurements.
To read the math operation type:
value = dmm.math.format
To write the math operation type:
dmm.math.format = value
Set value to:

dmm.MATH _NONE or 0

dmm.MATH_MXB or 1

dmm.MATH_PERCENT or 2

dmm.MATH_RECIPROCAL or 3
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
b is user entered constant for offset
Y is the result
When using relative offset measurement control
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)
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.
Series 3700 System Switch/Multimeter Reference Manual
(dmm.math.mxb.mfactor
(dmm.math.mxb.bfactor
(dmm.rel.enable
Document Number: 3700S-901-01 Rev. A / August 2007
(on page 9-101))
(on page 9-101))
(on page 9-110)), the