Keithley DMM7510 Reference Manual

Model DMM7510
7½ Digit Graphical Sampling Multimeter Reference Manual Section 8:
TSP command reference
DMM7510-901-01 Rev. B / May 2015 8-171
dmm.measure.math.percent
This attribute specifies the reference constant that is used when math operations are set to percent.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes
Restore configuration
Instrument reset
Power cycle
Measure configuration list
Configuration script
Measure configuration list
1
Usage
reference = dmm.measure.math.percent
dmm.measure.math.percent = reference
reference
The reference used when the math operation is set to percent; the range is -1e12 to
+1e12
Details
The percent math function displays measurements as percent deviation from a specified reference
constant. The percent calculation is:
Where:
• Percent is the result
• Input is the measurement (if relative offset is being used, this is the relative offset value)
• Reference is the user-specified constant
Example
dmm.measure.func = dmm.FUNC_DC_VOLTAGE
dmm.measure.math.format = dmm.MATH_PERCENT
dmm.measure.math.percent = 50
dmm.measure.math.enable = dmm.ON
Set the measurement function to voltage.
Set the math operations to percent.
Set the reference constant to 50 for voltage
measurements.
Enable math operations.
Also see
Calculations that you can apply to measurements (on page 3-7)
dmm.digitize.math.percent (on page 8-107)
dmm.measure.math.enable (on page 8-167)
dmm.measure.math.format (on page 8-168)

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