Dmm.measure.autorange - Keithley DMM7510 Reference Manual

Section 8: TSP command reference

dmm.measure.autorange

This attribute determines if the measurement range is set manually or automatically for the selected function.
Type TSP-Link accessible
Attribute (RW) Yes
Usage
state = dmm.measure.autorange
dmm.measure.autorange = state
state
Functions
dmm.FUNC_DC_VOLTAGE
dmm.FUNC_AC_VOLTAGE
dmm.FUNC_DC_CURRENT
dmm.FUNC_AC_CURRENT
dmm.FUNC_TEMPERATURE
Details
This command determines how the range is selected.
When this command is set to off, you must set the range. If you do not set the range, the instrument
remains at the range that was selected by autorange.
When this command is set to on, the instrument automatically goes to the most sensitive range to
perform the measurement.
If a range is manually selected through the front panel or a remote command, this command is
automatically set to off.
Auto range selects the best range in which to measure the signal that is applied to the input terminals
of the instrument. When auto range is enabled, the range increases at 120 percent of range and
decreases occurs when the reading is <10 percent of nominal range. For example, if you are on the 1
volt range and auto range is enabled, the instrument auto ranges up to the 10 volt range when the
measurement exceeds 1.2 volts. It auto ranges down to the 100 mV range when the measurement
falls below 1 volt.
When the TERMINALS switch is set to REAR and autorange is enabled, autoranging is limited to
ranges up to 3 A ranges. The 10 A range is not included in the autorange algorithm.
Example
dmm.measure.func = dmm.FUNC_DC_VOLTAGE
dmm.measure.range = 0.5
Also see
dmm.measure.range
Ranges (on page 3-3)
8-134
Model DMM7510 7½ Digit Graphical Sampling Multimeter Reference Manual
Affected by
Restore configuration
Instrument reset
Power cycle
Measure configuration list
Set the measurement range manually: dmm.OFF
Set the measurement range automatically: dmm.ON
dmm.FUNC_RESISTANCE
dmm.FUNC_4W_RESISTANCE
dmm.FUNC_DIODE
dmm.FUNC_CAPACITANCE
dmm.FUNC_CONTINUITY
(on page 8-175)
Where saved Default value
Configuration script dmm.ON
Measure configuration list
dmm.FUNC_ACV_FREQUENCY
dmm.FUNC_ACV_PERIOD
dmm.FUNC_DCV_RATIO
dmm.FUNC_DIGITIZE_CURRENT
dmm.FUNC_DIGITIZE_VOLTAGE
Select the measurement function to be DC voltage.
The instrument selects the 1 V range.
DMM7510-901-01 Rev. B / May 2015