Did you short out (or put some resistor) across the voltage inputs of the meters? Otherwise, they do read zero but its not an accurate representation of what happens if some voltage source is connected.
No, I forgot to short them, hence why on low ranges they were collecting charge (GOhms). But they behaved exactly the same when nothing is connected (also to current input) so I assume it is fine. DMM6500 was also tested the same way and yet it showed 2.5V out of nowhere, on 10MOhm ranges that don't accumulate that much charge.
Rigol DM3068 also didn't measure anything without shorting voltage input. I guess when shorted, we measure internal voltage drop on that branch of ground caused by current flow...
It all means pretty much nothing. It is using meter outside intended use..
Fact that you can program it, doesn't mean you can do what hardware wasn't meant to do...
What would be the typical "use cases" for such a setup (provided all work fine) with one common terminal? Normally, I would expect something like - to measure a voltage between the nodes A and B, and the current in any wire in my wiring. Thus I would need V+ V- and I+ and I- terminals, all floating.
I've attached a short clip demonstrating how the instrument is totally unresponsive. I can't be the only one having these issues right?
This DMM is completely unusable and extremely frustrating!Seems like your DMM want repair.
I use 6500 about 1 year - all works fine, captivate touch is very sensitive, and working on all my touches.
This DMM is completely unusable and extremely frustrating!
This can't possibly be right!
I've attached a short clip demonstrating how the instrument is totally unresponsive. I can't be the only one having these issues right?
https://mega.nz/#!MZURjIxQ!z3RixZ78lUd9IsXTKDPOkJ3QRNn7nYZNAlUjnb4h_-4
This DMM is completely unusable and extremely frustrating!
This can't possibly be right!
I've attached a short clip demonstrating how the instrument is totally unresponsive. I can't be the only one having these issues right?
https://mega.nz/#!MZURjIxQ!z3RixZ78lUd9IsXTKDPOkJ3QRNn7nYZNAlUjnb4h_-4
The firmware has rough edges, looks like people at Keithley made sure that the main use cases are mostly error free but if you go well outside the typical use cases it misbehaves. When I got my unit early this year it was crashing/freezing multiple times a day, probably because I was clicking the buttons, doing things outside of the typical use scenarios. After my learning phase ended the problems went away.
There are known issues, one is with swap screen and some scripts and applications. Brad O. said somewhere above that they were hoping to get a new firmware late March 2019 but that didn't happen and he got silent recently. Hope they are still working on a bug-fix firmware to be released sometime soon.
Anyhow if you installed some apps, scripts, especially a startup script, you may want to do a system reset and check again. With the current firmware it's easy to put the unit in an unstable state.
I've noticed that the placement of the DMM6500 affects this issue. When it was placed on a shelf as can be seen in the video, the issue appears. Now that I have it placed on my wooden computer desk it is back to working normally again
My theory is that the surface of whatever the DMM is sitting on and/or my position relative to the DMM is somehow affecting the capacitance of my finger which results in a functional or non function touchscreen
Have I gone mad or does this make any sense?
I've noticed that the placement of the DMM6500 affects this issue. When it was placed on a shelf as can be seen in the video, the issue appears. Now that I have it placed on my wooden computer desk it is back to working normally again
My theory is that the surface of whatever the DMM is sitting on and/or my position relative to the DMM is somehow affecting the capacitance of my finger which results in a functional or non function touchscreen
Have I gone mad or does this make any sense?
Never-mind, the problem is the power source.
For some reason it works fine when powered from the wall socket in my bedroom but not in another room
How does this make any sense?! Could it be that the instrument does not work properly when power from one of the 3 phases powering my house? Could it be a question of harmonics disturbing the sensitive components inside the meter?
I tried isolating the unit form the mains by powering it up from a pure sinewave inverter using a lead acid battery but the issue persisted.
!!!!DANGEROUS!!!!
Hi dear Brad O.
Hardware bug report:
DMM6500 do not compatible with Keithley 4299-9 Dual Fixed Rack-Mount Kit for 2U Graphical Display Instruments.
When i install front rack ear, down screw cannot install properly. That screew is too long and break current sense terminal if install it on full lenght.
PS.I use nut as spacer, for install that screw to proper letght... but it bad way... you need fix dmm6500! With 2450 that ear install's properly.
I've noticed that the placement of the DMM6500 affects this issue. When it was placed on a shelf as can be seen in the video, the issue appears. Now that I have it placed on my wooden computer desk it is back to working normally again
My theory is that the surface of whatever the DMM is sitting on and/or my position relative to the DMM is somehow affecting the capacitance of my finger which results in a functional or non function touchscreen
Have I gone mad or does this make any sense?
Never-mind, the problem is the power source.
For some reason it works fine when powered from the wall socket in my bedroom but not in another room
How does this make any sense?! Could it be that the instrument does not work properly when power from one of the 3 phases powering my house? Could it be a question of harmonics disturbing the sensitive components inside the meter?
I tried isolating the unit form the mains by powering it up from a pure sinewave inverter using a lead acid battery but the issue persisted.It could be a grounding issue. The touch-screen may work better if the instrument is properly grounded ( PE via the mains cable).
How can I tell if the touchscreen is the culprit or a bad firmware?
It could be a grounding issue. The touch-screen may work better if the instrument is properly grounded ( PE via the mains cable).
That could very well be the case, however the issue is that in Lebanon we do not install a ground connection for in residences so how can I properly ground the instrument to assure the touchscreen would work properly?
Could I create an artificial ground somehow?