9: Keithley External Control Interface (KXCI) Model 4200A-SCS Parameter Analyzer
9-44 4200A-901-01 Rev. C / February 2017
IT
This command sets the integration time.
Usage
ITA
IT4, X, Y, Z
• Short (0.1 PLC): 1
• Medium (1.0 PLC): 2
• Long (10 PLC): 3
• Custom (4200A command set only):
Delay factor for custom setting: 0.0 to 10.0
Filter factor for custom setting: 0.0 to 10.0
A/D converter integration time in number of PLCs for custom setting: 0.01 to 10.0
Details
The integration time is the time to convert a measurement. In general, a short integration time
provides the fastest measurement speed at the expense of noise. Conversely, a long integration time
provides stable readings at the expense of speed.
KXCI provides three preconfigured integration time settings that are equivalent to the Fast, Normal,
and Quiet settings available in Clarius. Short is equivalent to the Clarius Fast setting, Medium to
Normal, and Long to Quiet. Integration time is based on power line cycles (PLC). Assuming 60 Hz
line power, the integration time for a 1 PLC setting is 16.67 ms (1/60).
The custom setting combines delay factor, filter factor, and A/D integration time, which is comparable
to the individual Delay Factor, Filter Factor, and A/D converter integration time settings. For additional
information on the custom settings, see the Clarius timing window information.
Example 1
This command string sets the integration time to 1.0 PLC.
Example 2
This command string sets the delay factor to 2.5, the filter factor to 0.6, and the A/D converter integration
time to 1.3 PLCs.
Also see
Speed (on page 6-82)
Test settings (on page 6-80)
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