There should also be a way to get a constant sampling rate with AZ mode active. It may not be that fast (e.g. sampling rate near 24/29 Hz) but ideally should allow for a reasonable constant rate.
There is one thing which did not migrated properly: external triggering using the Digital I/O connector in K2700 emulation mode. We had to (re)connect the trigger line to the BNC connector on te back of unit to make it work.I see what you're talking about, I couldn't get it to work either. I know 2700 emulation was tested pretty extensively so I'm not sure if there's a problem with the manual or the emulation mode. The person who tested it is out this week, so I'll get back to you next week with an update. I'm glad you were able to get your triggering to work over BNC though!
HighVoltage
Thanks for your experiment. Can you make this measurement with 1NPLC for both DMM's also? Can you show statistical data for all experiments? Thanks again.
Here you go.
Both instruments are parallel on a Fluke 731B
Both instruments are on 1 NPLC and no Filter
I is nice to see how well both instruments agree on the 10V value of my source.
Some scripting tips inside
I didn't see any DMM6500 Reference Manual in the moment, as it is there for the DMM7510.
The only command-, syntax-reference to the DMM6500 TSP (-TekVISA) is encapsulated as html-xml in Win-TextScriptBuilder.
Don't know if i be allowed to publish the extracted web help as zip here in the forum (asking Brad-O)?
Don't know if i be allowed to publish the extracted web help as zip here in the forum (asking Brad-O)?
https://www.tek.com/tektronix-and-keithley-digital-multimeter/dmm6500-manual/model-dmm6500-6-1-2-digit-bench-system-0
Hello MikeP,
I can't see actually no expressive difference between measuring a ltz1000 reference with lm399 based dmm6500 with 5 or 10 NLPC. The result is the same as shown, setting isn't more accurate. Also filtering do show everything else than more the truth, because we try to measure the missing 7th digit with a higher noisy dmm as the reference itself.
Don't know if i be allowed to publish the extracted web help as zip here in the forum (asking Brad-O)?That would be very convenient. I only use TSB to read help ))
If it's not difficult for you to make me 7510 please.
So, i believe, tell me, no need to explicide extract that 7510 file. ;-)
I try to get uniform readings in Digitize_V mode.
The best I could get looks like this. But there are a number of strange regular artifacts. The main number of readings has a deviation of no more than 1 ns. But a number of calculations following about 100 counts have a larger deviation of up to 40 ns. Single emissions up to 120 ns.
On the graphs on the X axis time. On the Y axis, the deviation of the duration of 1 measurement from the ideal. In this case, from 100 μs.
Update:
As i see now, there is a big difference between Reference Manual 7510 and Reference Manual 6500:So, the use of the above mentioned, extracted, intern correct linked HTML-Helpfile-Doc's for workflow TSP programming make sense, till the Reference Manual 6500 is corrected.
- the Links in the 6500 Manual are not working,
(DMM6500-901-01 Rev. A / April 2018)- the Links in the 7510 Manual do!
That was easy
Hello MikeP,
I can't see actually no expressive difference between measuring a ltz1000 reference with lm399 based dmm6500 with 5 or 10 NLPC. The result is the same as shown, setting isn't more accurate. Also filtering do show everything else than more the truth, because we try to measure the missing 7th digit with a higher noisy dmm as the reference itself.
There is one thing which did not migrated properly: external triggering using the Digital I/O connector in K2700 emulation mode. We had to (re)connect the trigger line to the BNC connector on te back of unit to make it work.I see what you're talking about, I couldn't get it to work either. I know 2700 emulation was tested pretty extensively so I'm not sure if there's a problem with the manual or the emulation mode. The person who tested it is out this week, so I'll get back to you next week with an update. I'm glad you were able to get your triggering to work over BNC though!
upgrading to V1.0.03 fixed the issue.
Another question regarding the K2700 emulation-mode: the K2700 has a a current range of 0 ... 20 mA, the DAQ6510 only has 0 ... 10 mA or 0 ... 100mA ranges. In emulation-mode a 0 ... 20mA range is available, but how is this implemented? Nothing more than 0 ... 100mA range capped at 20mA?
Tell me who knows: how to correctly determine that the buffer filling in the device is over? For example, set Count = 1000 with 10 NPLC. It's half an hour. What should I ask the device to find out if it has finished?
I tried to find out
defbuffer1.endindex
defbuffer1.n
But always the data collection stopped.
What should I ask the device in order not to interfere with its data collection?
Or should I calculate the time myself and maintain the timeout?
Here's a small walk through on how to use the trigger model to have equal spacing between your measurements, where the spacing you want isn't necessarily the minimum.I checked this model. Unfortunately, it has the same 1 μs jitter.
Are those DigiV measurements with the 7510 or 6500?
It sounds like you're in continuous mode and then send the box a query over the remote interface, is that right? Continuous mode isn't available when you're using the remote interface, so the box will always leave it and go to Manual Trigger mode if you send it a command (which puts the box into remote mode). The commands you listed are a good way to find how full the buffer is (in combination with defbuffer1.capacity) but unless you start the measurement from a remote interface, going into remote mode will interrupt your measurement.
With the settings I gave? I see <100ns variation off of 1s between each reading. I'll put together a script tomorrow for you to try.
Update:
As i see now, there is a big difference between Reference Manual 7510 and Reference Manual 6500:So, the use of the above mentioned, extracted, intern correct linked HTML-Helpfile-Doc's for workflow TSP programming make sense, till the Reference Manual 6500 is corrected.
- the Links in the 6500 Manual are not working,
(DMM6500-901-01 Rev. A / April 2018)- the Links in the 7510 Manual do!
The hyperlinks in the manual are working fine for me with Adobe Acrobat, is anyone else have trouble? Try downloading directly from Tek.com...
Also, the TSB command help files are compiled from the same source the Reference Manuals are compiled from. You can access the TSB version of the help directly without going through TSB with (in Windows 10 at least): Windows Key > Keithley Instruments folder > TSB for 65XX Documentation. Or, just keep the Reference Manual pdf open and jump back to page 17, where the TSP command list starts.
Are those DigiV measurements with the 7510 or 6500?I was working with 7510. It was necessary to indicate this.
It seems to me that they are very similar? Or is it not?
With the settings I gave? I see <100ns variation off of 1s between each reading. I'll put together a script tomorrow for you to try.It is very interesting. It looks like I do not notice some important nuance. I will try to show the results that I get.
Update:
As i see now, there is a big difference between Reference Manual 7510 and Reference Manual 6500:So, the use of the above mentioned, extracted, intern correct linked HTML-Helpfile-Doc's for workflow TSP programming make sense, till the Reference Manual 6500 is corrected.
- the Links in the 6500 Manual are not working,
(DMM6500-901-01 Rev. A / April 2018)- the Links in the 7510 Manual do!
The hyperlinks in the manual are working fine for me with Adobe Acrobat, is anyone else have trouble? Try downloading directly from Tek.com...
Also, the TSB command help files are compiled from the same source the Reference Manuals are compiled from. You can access the TSB version of the help directly without going through TSB with (in Windows 10 at least): Windows Key > Keithley Instruments folder > TSB for 65XX Documentation. Or, just keep the Reference Manual pdf open and jump back to page 17, where the TSP command list starts.
Hmm, that's weird.
Are there different Reference Manuals: DMM6500-901-01 Rev. A / April 2018?
Downloaded from:
https://www.tek.com/tektronix-and-keithley-digital-multimeter/dmm6500-manual/model-dmm6500-6-1-2-digit-bench-system-0
Look at pictures, green are real hyperlinks, red are no hyperlinks, only colored text.