Keithley 2461 Reference Manual

Model 2461
Interactive SourceMeter® Instrument Reference Manual Section 8:
TSP command reference
2461-901-01 A/November 2015 8-107
smu.digitize.count
This attribute sets the number of measurements to digitize when a measurement is requested.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes
Restore configuration
Instrument reset
Power cycle
Configuration script 10,000
Usage
count = smu.digitize.count
smu.digitize.count = count
count
The number of measurements to make (1 to 55,000,000)
Details
The digitizer makes the number of readings set by this command in the time set by the sample rate.
This command does not affect the trigger model.
Example
smu.digitize.func = smu.FUNC_DIGITIZE_CURRENT
smu.digitize.aperture = smu.APERTURE_AUTO
smu.digitize.samplerate = 1000000
smu.digitize.count = 10
print(smu.digitize.read())
Set the digitize function to measure current.
Set the sample rate to 1,000,000, with a
count of 10, and automatic aperture.
Make a digitize measurement.
Example output:
-0.0039799990218
Also see
Digitize functions (on page 2-113)
smu.digitize.aperture (on page 8-106)
smu.digitize.samplerate (on page 8-128)
smu.digitize.displaydigits
This attribute describes the number of digits that are displayed on the front panel for the selected function.
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
smu.DIGITS_4_5
Usage
value = smu.digitize.displaydigits
smu.digitize.displaydigits = value
value
•
6½ display digits: smu.DIGITS_6_5
• 5½ display digits: smu.DIGITS_5_5
• 4½ display digits: smu.DIGITS_4_5
• 3½ display digits:
smu.DIGITS_3_5

Keithley 2461 Specifications

General

Maximum Current	7 A
Power	100 W
Resolution	6.5 digits
Source Measure Unit (SMU)	Yes
DC Voltage	100 V
Maximum Voltage	100 V
Display	5-inch capacitive touchscreen
Connectivity	USB, GPIB
Software	TSP
DC Current	7 A
Current Source Range	0 to 7 A
Voltage Measurement Range	100 mV to 100 V
Current Measurement Range	10 nA to 7 A
Voltage Measurement Resolution	100 nV