Keithley DMM7510 Reference Manual

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

Keithley DMM7510 Specifications

General

Resolution	7.5 digits
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
DC Current Range	10 µA to 10 A
Resistance Range	10 Ω to 1 GΩ
Sampling Rate	1 MS/s
Memory	27.5 million readings
Display	5 inch capacitive touchscreen
AC Voltage Accuracy	±0.06% of reading
AC Current Range	10 A
Connectivity	USB, LAN, GPIB