Keithley DMM7510 Reference Manual

Section
6: SCPI command reference Model DMM7510 7½ Digit Graphical Sampling Multimeter
Reference Manual
6-54 DMM7510-901-01 Rev. B / May 2015
Details
Function Default value Range
Voltage (AC and DC) 60 Hz: 16.67 ms
50 Hz: 20 ms
8.333 µs to 0.25 s
10
µ
s to 0.24 s
Current (AC and DC)
60 Hz: 16.67 ms
50 Hz: 20 ms
8.333 µs to 0.25 s
10
µ
s to 0.24 s
Resistance (2-wire and 4-wire) 60 Hz: 16.67 ms
50 Hz: 20 ms
8.333 µs to 0.25 s
10 µs to 0.24 s
Diode
60 Hz: 16.67 ms
50 Hz: 20 ms
8.333 µs to 0.25 s
10
µ
s to 0.24 s
Temperature 60 Hz: 16.67 ms
50 Hz: 20 ms
8.333 µs to 0.25 s
10
µ
s to 0.24 s
Frequency and Period
10 ms
10 ms to 0.273 s
Voltage ratio 60 Hz: 16.67 ms
50 Hz: 20 ms
8.333 µs to 0.25 s
10
µ
s to 0.24 s
Digitize (voltage and current)
Automatic
1 µs to 1 ms set in 1 µs increments
The functionality of aperture depends on whether you are using a measure function or a digitize
function.
Aperture for a measure function
If you are using a measure function, 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.
To calculate the aperture based on the NPLC value, use the following formula.
where:
• Aperture is the integration rate in seconds for each integration
• NPLC is the number of power line cycles for each integration
• f is the power line frequency

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