NPLC rate at 2701

NPLC rate at 2701

Postby luli8697 » January 7th, 2013, 7:14 pm

in manual, which said 2701 is optmized for the 1 to 5 PLC reading rate. but it also said the lowest rate can be set to 50 PLC from bus operation (see manual page174), which should give lowest noise. which will be better? 5 or 50 if I need lowest noise level ()I don't care of speed)?
luli8697
 
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Re: NPLC rate at 2701

Postby RaymondR » January 8th, 2013, 10:30 am

Hi luli8697,

50 NPLC will give the lowest noise reading.

In this case each measurement is integrated over 50 power line cycles, which essentially means the measurement is continuously averaged for about 830 ms (for 60 Hz power). You can further include the digital filter to average over many of these measurements.

Note that you can easily configure these settings to have a measurement take over 10 seconds before you see any kind of data.

Let me know if I need to clarify anything.
RaymondR
Keithley Applications
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Re: NPLC rate at 2701

Postby luli8697 » January 8th, 2013, 7:56 pm

Thanks RaymondR!
this is very helpful!
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