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Search found 6 matches

by Chess30
February 10th, 2016, 5:37 am
Forum: Electrometers
Topic: Reading rates of 6517B
Replies: 3
Views: 19303

Re: Reading rates of 6517B

Thanks.
So just to be clear, the 3300 readings / s isn't actually achievable it is 425 which is the max. If I include the timestamp data too I guess this will drop? If I want to read in low currents and voltages at higher frequencies what should I use then?
by Chess30
February 9th, 2016, 4:00 am
Forum: Electrometers
Topic: Reading rates of 6517B
Replies: 3
Views: 19303

Reading rates of 6517B

I am thinking of buying a 6517B to do some low current and voltage measurements that I want to measure over time at frequencies of 1 Hz - 1kHz. I was planning on using a labview program to control it via a USB-GPIB connection to the instrument. I was just looking at the specs though and the reading ...
by Chess30
January 26th, 2016, 9:39 am
Forum: PicoAmmeters
Topic: 6487 labview current vs. time measurement
Replies: 6
Views: 33101

Re: 6487 labview current vs. time measurement

Are you saying that when I change the range down to nA scale on the -, the sampling rate drops to 100 S/s? My current program reads at 50S/s even if the current is in mA. So you don't suggest getting a new DAQ? What about the DMM 2002? This has an even slower sampling rate, does it have the same pro...
by Chess30
January 25th, 2016, 8:24 am
Forum: PicoAmmeters
Topic: 6487 labview current vs. time measurement
Replies: 6
Views: 33101

Re: 6487 labview current vs. time measurement

I meant the 2002 for the voltage measurement.
by Chess30
January 25th, 2016, 7:52 am
Forum: PicoAmmeters
Topic: 6487 labview current vs. time measurement
Replies: 6
Views: 33101

Re: 6487 labview current vs. time measurement

Thanks for the useful comment. I am measuring very low currents down to pA - nA which is why I am using a - so I can't use the DMM7510. I am also measuring the voltage simultaneously vs. time with a Keithley 2400 (few V range). I used to use a DAQ (quite an old model) to measure voltage directly and...
by Chess30
January 24th, 2016, 10:01 am
Forum: PicoAmmeters
Topic: 6487 labview current vs. time measurement
Replies: 6
Views: 33101

6487 labview current vs. time measurement

I am trying to continuously measure and plot current vs. time using a GPIB-USB adaptor and a labview program (attached). When the program ends it then saves all the acquired data. I am trying to measure this at th highest possible sampling rate by using the buffer and each current measurment comes w...

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