Dmm.measure.aperture - Keithley DMM7510 Reference Manual

Model DMM7510 7½ Digit Graphical Sampling Multimeter Reference Manual

dmm.measure.aperture

This function determines the aperture setting for the selected function.
Type TSP-Link accessible
Attribute (RW) Yes
Usage
value = dmm.measure.aperture
dmm.measure.aperture = value
value
Functions
dmm.FUNC_DC_VOLTAGE
dmm.FUNC_AC_VOLTAGE
dmm.FUNC_DC_CURRENT
dmm.FUNC_AC_CURRENT
dmm.FUNC_TEMPERATURE
Details
Function
Voltage (AC and DC)
Current (AC and DC)
Resistance (2-wire and 4-wire)
Diode
Temperature
Frequency and Period
Voltage ratio
The aperture sets the amount of time the ADC takes when making a measurement, which is the
integration period for the selected measurement function. The integration period is specified in
seconds. In general, a short integration period provides a fast reading rate, while a long integration
period provides better accuracy. The selected integration period is a compromise between speed and
accuracy.
During the integration period, if an external trigger with a count of 1 is sent, the trigger is ignored. If
the count is set to more than 1, the first reading is initialized by this trigger. Subsequent readings
occur as rapidly as the instrument can make them. If a trigger occurs during the group measurement,
the trigger is latched and another group of measurements with the same count will be triggered after
the current group completes.
You can also set the integration rate by setting the number of power line cycles (NPLCs). Changing
the NPLC value changes the aperture time and changing the aperture time changes the NPLC value.
DMM7510-901-01 Rev. B / May 2015
Affected by Where saved
Restore configuration Configuration script
Instrument reset Measure configuration list
Power cycle
Measure configuration list
The integration rate; see Details for ranges
dmm.FUNC_RESISTANCE
dmm.FUNC_4W_RESISTANCE
dmm.FUNC_DIODE
dmm.FUNC_CAPACITANCE
dmm.FUNC_CONTINUITY
Default value
60 Hz: 16.67 ms
50 Hz: 20 ms
60 Hz: 16.67 ms
50 Hz: 20 ms
60 Hz: 16.67 ms
50 Hz: 20 ms
60 Hz: 16.67 ms
50 Hz: 20 ms
60 Hz: 16.67 ms
50 Hz: 20 ms
10 ms
60 Hz: 16.67 ms
50 Hz: 20 ms
Section 8: TSP command reference
Default value
See Details
dmm.FUNC_ACV_FREQUENCY
dmm.FUNC_ACV_PERIOD
dmm.FUNC_DCV_RATIO
dmm.FUNC_DIGITIZE_CURRENT
dmm.FUNC_DIGITIZE_VOLTAGE
Range
8.333 µs to 0.25 s
10 µs to 0.24 s
8.333 µs to 0.25 s
10 µs to 0.24 s
8.333 µs to 0.25 s
10 µs to 0.24 s
8.333 µs to 0.25 s
10 µs to 0.24 s
8.333 µs to 0.25 s
10 µs to 0.24 s
10 ms to 0.273 s
8.333 µs to 0.25 s
10 µs to 0.24 s
8-131