Is there a way to check how much (turn on) power cycles the unit has?
This revision is intended for use with firmware version 1.7.0 and later.
Has this text always been present there for the DMM6500 Manual:
https://www.tek.com/product-support?series=DMM6500%206%C2%BD-Digit%20Graphical%20Touchscreen%20Digital%20MultimeterQuoteThis revision is intended for use with firmware version 1.7.0 and later.They updated the demo clock application to 2.0
Are we getting a firmware update as Christmas present??
So, it would appear that from this document at least, the "v1.7.0" firmware is not related to the DMM6500.
for key,value in pairs(getmetatable(localnode.fan).Setters) do print(key, value) end
results in:level function: 2238968
print(fan.level)
Results in fan.LEVEL_QUIET
fan.level = fan.OFF
Does not seem to work. But it should be the right enum value (2) to turn it off.So, it would appear that from this document at least, the "v1.7.0" firmware is not related to the DMM6500.Yes. Firmware "v1.7.0" has just appeared for 7510. And in this firmware for the first time added the ability to run applications. To interest users, the application of the clock has been fixed. Those. A new watch is needed for the 7510.
Has anyone encountered the relay constantly clicking problem on 6500 when measuring current of a light load (~4mA, switching reagulator) ?
Setting to 1A manually works, but setting it to 10mA or 100mA results in "Overflow".
The load may have spikes, but definitely nothing in the 100+mA range.
Measuring voltage with shunt (0,1Ohm) works fine (100mV Range).
Any ideas ? Anyone encountered that ?
Thanks,
Thomas
Could you please remind me, does the fan is always on, or only when the unit is booted up?
Hi All, long time lurker..
I can confirm, there is no officially sanctioned way to turn the fan off.
The specs (under all operating conditions) require the little bit of air movement inside the instrument.
My device is BTW about to be replaced by CN Rood. I hope the calibration date of the new device will be more recent. Are you tempted ?
I work on the product analog design for Keithley.
For the fan air - you could try blocking the vents with a breathable fabric. If placed loosely nearby it should still allow some air exchange while reducing the audible noise. If it is completely blocked off, the internal temp will rise and after some time, you may see measurements have drifted. A good test is turn autozero OFF then block up your airflow.. after 30 minutes see how much drift has occurred (in addition to the normal spec) - it might be perfectly acceptable to your application. This kind of operation wasn't characterized very much.
For your transformer hum - Early units are known to exhibit this. I think if you find it too loud, you can return it for exchange if its still in warranty. Brad O can better help with that. Otherwise, this problem can be fixed but it requires something most users would rather not deal with.
Everything I do on this forum is my free time but I can help answer questions since Brad seems quite busy these days - glad to help out.
MULTI-MEASURE bug - If I understood correctly what the video was showing (when going to 100V or 1kV range), then yes its a known hardware issue that will be resolved on the next revision.
Hi All, long time lurker..
I can confirm, there is no officially sanctioned way to turn the fan off.
The specs (under all operating conditions) require the little bit of air movement inside the instrument.
MULTI-MEASURE bug - If I understood correctly what the video was showing (when going to 100V or 1kV range), then yes its a known hardware issue that will be resolved on the next revision.
Ouch, I wonder if this will be covered under warranty or is at least a mod we can perform ourselves.. thanks for providing information btw.
I am unsure about covered under warranty (you will have to contact applications ENG for that) -- I don't recall all the details ATM, I thought it might only be reproduced with open voltage input connections or something along those lines (not a common or normal use case if I am remembering right)
If you could post your setup details and how the issue is causing problems for you, we can assist in finding a workaround that could be satisfactory for you. In any case, I think the issue is logged in our system.
JxR - sorry to hear you didnt get contacted again to get a satisfactory result to your issue. I'll "remind" some guys about this to close the loop with you. I dont follow the Tek forums (where you posted) as they seem to not be as active as this place. However, the Tek forums are the "official" place to document the reports / ask questions so you did the right thing.
MULTI-MEASURE bug - If I understood correctly what the video was showing (when going to 100V or 1kV range), then yes its a known hardware issue that will be resolved on the next revision.
Some comments
MULTI-MEASURE bug - If I understood correctly what the video was showing (when going to 100V or 1kV range), then yes its a known hardware issue that will be resolved on the next revision.
Maybe you can shine some light on the limitations of MULTI-MEASURE of voltage and current (excluding the 100V range bug)
In this thread we checked other DMMs (not Keithley) and also much more expensive DMMs and they all have this xx mV reading when running 1A through the device.
So that seems to be a common thing to happen, that is how it should work.
But how does Keithley or any other manufacture then say voltage can be measured while current is running through the device? Seems to me the best you can say is it can be done but then the voltage is completely out of spec.
Anyway it's better to have it and understand what the limitations are than having it disabled.
From what I experience it's rarely a good idea to do both on one device hence why I don't really worry about the 100V range bug.