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All about Keithley DMM7510. Bugs and features, recipes, advice, notes.
MegaVolt:
--- Quote from: E-Design on November 25, 2019, 10:24:30 pm ---There is an internal signal path difference based on selection 10M or Auto.
--- End quote ---
Can you reveal the details? What is the difference? What is the input impedance in Auto mode? Does the device have the ability to work with an input impedance of 1 GΩ for the ranges 100V and 1000V ???
MegaVolt:
New firmware 1.7.0. Trying to write a large contiguous buffer (8 000 000 samples) at a time:
Settings:
Digi V + [Freq=1MHz] + [Aperture=1mks] + [count = 8,000,000]
When time-critical processes are not implemented on the hardware, but are given to programmers, it’s a disaster :( When the product is more than 5 years old. But he still cannot do a simple operation - write a buffer of a given size with a given frequency. But on the screen you can run the watch and other toys. :palm:
MegaVolt:
New KickStart released.
https://uk.tek.com/software/kickstart/2-2-1
MegaVolt:
Updated the header:
Added by:
- firmware 1.7.0 аdditional Information;
- link`s;
MegaVolt:
--- Quote from: MegaVolt on September 27, 2019, 12:05:38 am ---Measured the cutoff frequency in DigiV mode.
...
For the 100V range, the cutoff frequency is 7.5 kHz.
For 1000V, the cutoff frequency is 17.5 kHz.
--- End quote ---
I figured out different cutoff frequencies for 100V and 1000V
17.5 kHz available for:
1000 V + 10 MΩ
1000 V + Auto
100 V + 10 MΩ
7.5 kHz becomes at a combination of parameters 100 V + Auto
Why, when choosing the input resistance Auto for the range of 100 V, the strip changes I do not know. This is some kind of mystery.
I tried to measure the input impedance for Auto and for 10 MΩ = 10 MΩ without changes.
Something inside limits the band.
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