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OWON XDM1041 the unknown multimeter...

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davebb:
Hi i have just connected 99.5ohm and am getting -000.6c and it does not change after 10min so yes i will have to try a pt100,
does the K type respond faster to temp change,
do you know what software we can use to extract and load the firmware ,

Thanks Dave

theHWcave:
I mentioned a few posts ago that there is no 10min cycle in PT100 mode...
Responsiveness depends a lot on the packaging. My PT100 sensor end is encased into some metal housing (like a short 6mm diameter pipe). That protects it well but makes it slower to respond than both my K-types which have the naked junction exposed.

The RS-components 409-4920 K-type I mentioned before has a  response time of 0.1s (datasheet). The PT100 (also RS) has no response time listed in the datasheet.

I am somewhat surprised you went for a PT100 not a "reputable" K-type. Unless of course you measure mostly high temperatures or got a probe with really short and thick leads. 

No idea how one would load firmware. I suppose it is possible that a certain button combination gets the processor into accepting firmware sent over the serial port but so far OWON has remained silent...

davebb:
Hi i have not yet got a PT100, yes i did read that you said your meter did not do the 10min, but as mine is v1.3.0 i would test mine.
i only used a resistor, i hope that we get new firmware that also fixes this,
Thanks Dave

kwass:
Dave said:

--- Quote ---Just stumbled across this myself on ebay.
I kinda like the look of it!
Shame it's not battery powered.
--- End quote ---

But mine is!  I took advantage of all the USB power stuff available for cheap and replaced the internal 5V supply with a Qi charged LiPo cell.  I used this https://www.amazon.com/gp/product/B07M6CRQ71/ Qi receiver on Amazon along with this https://www.amazon.com/gp/product/B08GWTBD3T/ charger/booster module.  I used a large Qi pad https://www.amazon.com/gp/product/B07PYQQ1R7/ that the meter fits nicely on and has an "active" green LED in front.

While not necessary I added a small voltage meter so that I could see the change state of the LiPo cell all the time through the back window I installed in place of the IEC socket.  Also I installed threaded inserts to make removing the cover easier.

While I keep the meter on all the time, when it's "off the Qi pad" battery life is around 10 hours at full brightness, measuring volts, using a 3000mAh LiPo cell.  If you reduce the brightness to the minimum setting, it will last a full day.

theHWcave:
@kwass: what a great mod! Very nice.

Can you tell me where you got these threaded inserts from? The number of times I open mine would make this a worth-while addition...

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