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Precise Offset Compensation Ohm Measurements and Validation of DMMs
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Smokey:
I just picked up a Keithley2700 with OCOMP. 
https://download.tek.com/manual/2700-900-01K_Feb_2016.pdf

There is no mention of NPLC related to that OCOMP process.  In fact they only let you select "fast"=0.1NPLC, "Medium"=1NPLC, or "Slow"=5NPLC from the front panel for measurements.  Using GPIB NPLC can be set up to 50, but that's it.

Update:  Just ran a test.  24Ohm resistor, 4W-OCOMP.  Square wave type signal with about +/-18mV.
Slow = 2.1Hz
Medium = 8.6Hz
Fast = 17.7Hz
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