Does it make noise in standby?
Some more information for you guys!
You can watch the video here: [48 Minutes]
youtu.be/Lezd27BzQLo
But the very most of them you can do with dmm6500 and scancard too?
But the very most of them you can do with dmm6500 and scancard too?A K2000 or DMM6500 with scan card is effectively a DAQ, unless I'm missing something.
But the very most of them you can do with dmm6500 and scancard too?A K2000 or DMM6500 with scan card is effectively a DAQ, unless I'm missing something.
Some more information for you guys!
You can watch the video here: [48 Minutes]
youtu.be/Lezd27BzQLoWhat took you that long nice to get some extra example of configuring a trigger and yes FFT please
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I couldn't justify the extra price for the DAQ6510 + Cards though, most of it is present in the DMM6500 and I would probably not use the cards very often assuming I would buy one.
edit: Also the DMM6500 has a 10A input at the back while the DAQ6510 is limited to 3A with a high burden voltage.
although there is a serious flaw with that either in hardware or software (not sure which since Keithley went dead silent after I pointed it out to them). I can only guess its in the hardware, but who knows since they won't discuss it.
Could you clarify the details of this problem?
here is the setup and pics below.
here is the setup and pics below.How exactly do you connect the device?
For 6500 there is a limit: "Sense terminals on inputs are limited to 10 V range during ratio measurement."
here is the setup and pics below.How exactly do you connect the device?
For 6500 there is a limit: "Sense terminals on inputs are limited to 10 V range during ratio measurement."
No sense terminals are used. The circuit diagram shows the connection points, and the polarity of the measurements in the pictures confirms which terminals I used.
Here are some pics. Hopefully the wire colors make it clearer.
I would love if someone else could confirm my findings, since I still really don't know if it is just isolated to my particular unit. There really is nothing I can find to explain the behavior, and my test setup is identical between two different meters.
Also, there is of course no problem measuring current or voltage separately (meaning either a connection to the Amp input or to the HI input, but not both simultaneously).
I wonder if this has something to do with the relay timings and/or measurement delays. Have you tried with different integration times (NPLC, repeat filters etc)?
I tried the same thing as your setup. Both with a battery and with a power supply. I could not replicate the issue. The instrument reports the correct results.
Very strange! Can you check (with a separate meter across the battery) if DMM6500 is reporting incorrect voltage? Presumably that is the case since the current does not change as you switch the voltage range.
If so, it could be a error in their switch matrix for different ranges.
There are no relays switching during the testing, except when you manually choose the 100V range (no relay switching occurs on the 1A/3A/10A ranges with simultaneous measurements). NPLC/filter has no effect. You do not have to technically even be doing a simultaneous measurement, it will occur only measuring voltage. But the circuit has to be wired up to do a simultaneous V/I measurement: Common LO, amp input near the low side of circuit, HI input where appropriate. Anyways, alot of people here have actual DMM6550, and it is a simple enough circuit to duplicate.
It can of course be done using a power supply and electronic load as well, just better to make sure you are pulling around 1A or above. It is not really apparent at all if you are only drawing say 1mA.
I see the same problem: In DC voltage mode if you pass some current through the amps-common connectors, the voltage is misreported. Passing 1A through the amps terminal causes ~ -45mV error in voltage measurement in 10V range, and ~-2.6V error in 100V and 1000V ranges. Halving the current causes the voltage measurement error to halve too.
There seems to be a cross-talk from amps circuit in voltage mode indeed.