I have a question regarding the Keithely 6514 overhead time.

<p>I want to measure a low-current signal with an electrometer 6514.
I want to read the current value per second from my computer via GPIB communication.
Considering the noise, can I set it to 6 nplc and store 5 values in a buffer so that I can read the average value in 1 second?

1 nplc / 60hz = 16.7ms
16.7ms * 6 nplc = 100.2 ms
100.2 ms * 5 buffer = 501 ms...

I think I need to know the overhead time in addition to the integration time to make the calculation correct, but I can't find any information on the overhead time anywhere.

Last page of Datasheet says 1200 readings per second into buffer at 0.01 nplc and with other things turned off.
This gives some idea of the overhead.

using trigger model to acquire N measurements into buffer will be most time determinant was to operate the 6514.
Can the timestamps give you some info?

Alternately, there is an analog signal on the preamp output.  You can sample that for exactly 1 second with scope if looking for area under current vs time curve for amp-hr info.