Model DMM7510 7½ Digit Graphical Sampling Multimeter Reference Manual
Section 4: Measure considerations
DMM7510-901-01 Rev. B / May 2015
4-15
The offset-compensated ohms reading is then calculated as follows:
V
1
is the voltage measurement with the current source at its normal level.
V
2
is the voltage measurement using the lowest current source setting.
I
1
is the current measurement with the source set to a specific level.
I
2
is the current measurement with the source set to zero.
This 2-point measurement process and reading calculation eliminates the resistance contributed by
the presence of V
EMF
.
When the source is turned on, the output cycles between the programmed value and zero (0 A or
0 V) to derive the offset-compensated ohms measurement.
Order of operations
The measurements have filtering, relative offset values, math operations, and limit testing applied to
them in a predetermined order. The measurements that are displayed on the front panel and that are
stored in the reading buffers represent the measurements with any selected operations applied to
them.
These operations are applied to the measurement as shown in the following figure.
Figure 145: Model DMM7510 order of operations
