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Search found 4 matches

by Matthew V
February 1st, 2019, 8:34 am
Forum: Low Current Measurements
Topic: Effective input resistance in current mode at high temp
Replies: 2
Views: 2502

Re: Effective input resistance in current mode at high temp

Thanks for the response, Dale C. I should have also mentioned earlier that in the lab the temperature does not remain stable. The temperature continues to rise in the lab with all the equipment on even after waiting 7+ hours. The electrometers were recalibrated within the last month in a 72°F enviro...
by Matthew V
January 30th, 2019, 5:43 pm
Forum: Low Current Measurements
Topic: Effective input resistance in current mode at high temp
Replies: 2
Views: 2502

Effective input resistance in current mode at high temp

Based on this forum and the low level measurement handbook, I read that the input resistance when operating within ±1°C of the calibration temperature is input resistance < voltage burden/full-scale current Unfortunately, the lab I am working in routinely becomes much hotter than the calibration tem...
by Matthew V
January 30th, 2019, 5:05 pm
Forum: Low Current Measurements
Topic: Synchronized Time Reference
Replies: 2
Views: 4613

Re: Synchronized Time Reference

Thanks for the reply. I was on time crunch and needed to get something working fast. I ended up using the trigger link on both instrument with a trigger signal generated by a waveform generator. Both electrometers store measurements into the buffer along with a timestamp. Sometimes the clock on one ...
by Matthew V
October 16th, 2018, 12:54 pm
Forum: Low Current Measurements
Topic: Synchronized Time Reference
Replies: 2
Views: 4613

Synchronized Time Reference

I am performing an experiment where two currents are measured over time using Keithley Model 6514 electrometers. I don’t necessarily need to measure both currents at the precisely the same time; however, I do need the timestamp associated with each measurement to be in reference to the same time. I ...

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