Series 3700A System Switch/Multimeter Reference Manual
Section 4: Basic DMM operation
3700AS-901-01 Rev. D/June 2018
4-53
You can use the relative offset used to set the percent as follows:
-- Sets percent with relative offset acquire value.
dmm.math.percent = dmm.rel.acquire()
-- Send the result of relative offset acquire to a computer.
print(dmm.math.percent)
Reciprocal (1/X)
You can set math operation to reciprocal to display the reciprocal of a reading.
The reciprocal is 1/X, where X is the reading. If relative offset is on, the 1/X calculation uses the input
signal with the relative offset applied.
The result of the 1/X calculation may be displayed in exponential notation. For example, a displayed
reading of +2.500E+03 is equivalent to 2500.
Example:
Assume the normal displayed reading is 002.5000 Ω. The reciprocal of resistance is conductance.
When the reciprocal math function is enabled, the following conductance reading is displayed:
0.400000
When the reciprocal math operation is active, the unit of measure for the front-panel voltage and
current readings is
R
and the MATH indicator is displayed to the right of the measurement. For
resistance readings, the units of measure do not change. You cannot change this units designator.
Scanning
When a scan is configured, each channel can have its own unique math setup. For remote
programming, the channel list parameter is used to configure channels for a scan.
Example:
To perform the reciprocal math operation on DC volt measurements, send the following commands:
-- Select DC volts function.
dmm.func = "dcvolts"
-- Reset DC volts only.
dmm.reset("active")
-- Set the math operation to be reciprocal for measurements.
dmm.math.format = dmm.MATH_RECIPROCAL
-- Enable the math operation for measurements.
dmm.math.enable = dmm.ON
-- Call the configuration mymath.
dmm.configure.set("mymath")
-- Set Channels 1001 to 1030 to use the mymath configuration.
dmm.setconfig("1001:1030", "mymath")
-- Create scan list of channels 1001 to 1030 using mymath.
scan.create("1001:1030")
